CVE-2022-49058

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Add a check to ensure that 'link_len' is not larger than\nthe size of the 'link_str' buffer."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H", "baseScore": 9.1, "baseSeverity": "CRITICAL"}, "scenarios": [{"lang": "en", "value": "AV:N - The attacker-controlled MF symlink payload is delivered over SMB as remote file contents and parsed in the CIFS client (query_mf_symlink/check_mf_symlink \u2192 parse_mf_symlink), so a malicious or compromised file server triggers the bug across the network.\nAC:L - A crafted 1067-byte MF symlink with an sscanf-derived link_len above 1024 (up to 9999 via %04u) deterministically drives crypto_shash_update/kstrndup past the in-buffer link_str; no race or layout luck is required.\nPR:N - The attacker only needs to operate or impersonate the SMB endpoint; no credentials or privileges on the victim client are required for the server to return the malicious object.\nUI:N - In the worst reasonable deployment (cifsroot defaults include mfsymlinks; fstab/autofs/container shares), ordinary client lookup/revalidate/get_link activity on an already-mounted share parses the planted object with no exploit-time victim action.\nS:U - The heap over-read and any resulting oops stay within the host kernel CIFS client authority and do not cross a VM, IOMMU, or sandbox boundary.\nC:H - parse_mf_symlink feeds an attacker-chosen link_len into hashing/string duplication over link_str, over-reading up to ~9KB past the kmalloc object; that is a large OOB read and can surface heap bytes via kstrndup if the MD5 check is satisfied.\nI:N - The defect is an out-of-bounds read of server-supplied symlink bytes into MD5/kstrndup paths, not an out-of-bounds write or control-flow corruption primitive, matching other SMB client OOB-read symlink parses.\nA:H - Reading thousands of bytes past a 1067-byte allocation can fault unmapped heap and oops the kernel, and a malicious server can trigger the malformed object repeatedly on path access."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/cifs/link.c"], "versions": [{"version": "c69c1b6eaea1b3e1eecf7ad2fba0208ac4a11131", "lessThan": "3e582749e742e662a8e9bb37cffac62dccaaa1e2", "status": "affected", "versionType": "git"}, {"version": "c69c1b6eaea1b3e1eecf7ad2fba0208ac4a11131", "lessThan": "1316c28569a80ab3596eeab05bf5e01991e7e739", "status": "affected", "versionType": "git"}, {"version": "c69c1b6eaea1b3e1eecf7ad2fba0208ac4a11131", "lessThan": "eb5f51756944735ac70cd8bb38637cc202e29c91", "status": "affected", "versionType": "git"}, {"version": "c69c1b6eaea1b3e1eecf7ad2fba0208ac4a11131", "lessThan": "22d658c6c5affed10c8907e67160cef0b6c92186", "status": "affected", "versionType": "git"}, {"version": "c69c1b6eaea1b3e1eecf7ad2fba0208ac4a11131", "lessThan": "4e166a41180be2f1e66bbb6d46448e80a9a5ec05", "status": "affected", "versionType": "git"}, {"version": "c69c1b6eaea1b3e1eecf7ad2fba0208ac4a11131", "lessThan": "9901b07ba42b39266b34a888e48d7306fd707bee", "status": "affected", "versionType": "git"}, {"version": "c69c1b6eaea1b3e1eecf7ad2fba0208ac4a11131", "lessThan": "515e7ba11ef043d6febe69389949c8ef5f25e9d0", "status": "affected", "versionType": "git"}, {"version": "c69c1b6eaea1b3e1eecf7ad2fba0208ac4a11131", "lessThan": "64c4a37ac04eeb43c42d272f6e6c8c12bfcf4304", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/cifs/link.c"], "versions": [{"version": "2.6.37", "status": "affected"}, {"version": "0", "lessThan": "2.6.37", "status": "unaffected", "versionType": "semver"}, {"version": "4.9.311", "lessThanOrEqual": "4.9.*", "status": "unaffected", "versionType": "semver"}, {"version": "4.14.276", "lessThanOrEqual": "4.14.*", "status": "unaffected", "versionType": "semver"}, {"version": "4.19.239", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.4.190", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.112", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.35", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.17.4", "lessThanOrEqual": "5.17.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.18", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.37", "versionEndExcluding": "4.9.311"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", 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[{"url": "https://git.kernel.org/stable/c/3e582749e742e662a8e9bb37cffac62dccaaa1e2"}, {"url": "https://git.kernel.org/stable/c/1316c28569a80ab3596eeab05bf5e01991e7e739"}, {"url": "https://git.kernel.org/stable/c/eb5f51756944735ac70cd8bb38637cc202e29c91"}, {"url": "https://git.kernel.org/stable/c/22d658c6c5affed10c8907e67160cef0b6c92186"}, {"url": "https://git.kernel.org/stable/c/4e166a41180be2f1e66bbb6d46448e80a9a5ec05"}, {"url": "https://git.kernel.org/stable/c/9901b07ba42b39266b34a888e48d7306fd707bee"}, {"url": "https://git.kernel.org/stable/c/515e7ba11ef043d6febe69389949c8ef5f25e9d0"}, {"url": "https://git.kernel.org/stable/c/64c4a37ac04eeb43c42d272f6e6c8c12bfcf4304"}], "title": "cifs: potential buffer overflow in handling symlinks", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2022-49058", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2025-10-01T19:50:01.997451Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-120", "description": "CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')"}]}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-10-01T19:57:06.701Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2022-49058", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2025-10-01T19:50:01.997451Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-120", "description": "CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')"}]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-10-01T16:03:29.276Z"}}], "cna": {"title": "cifs: potential buffer overflow in handling symlinks", "metrics": [{"cvssV3_1": {"version": "3.1", "baseScore": 9.1, "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H"}, "scenarios": [{"lang": "en", "value": "AV:N - The attacker-controlled MF symlink payload is delivered over SMB as remote file contents and parsed in the CIFS client (query_mf_symlink/check_mf_symlink \u2192 parse_mf_symlink), so a malicious or compromised file server triggers the bug across the network.\nAC:L - A crafted 1067-byte MF symlink with an sscanf-derived link_len above 1024 (up to 9999 via %04u) deterministically drives crypto_shash_update/kstrndup past the in-buffer link_str; no race or layout luck is required.\nPR:N - The attacker only needs to operate or impersonate the SMB endpoint; no credentials or privileges on the victim client are required for the server to return the malicious object.\nUI:N - In the worst reasonable deployment (cifsroot defaults include mfsymlinks; fstab/autofs/container shares), ordinary client lookup/revalidate/get_link activity on an already-mounted share parses the planted object with no exploit-time victim action.\nS:U - The heap over-read and any resulting oops stay within the host kernel CIFS client authority and do not cross a VM, IOMMU, or sandbox boundary.\nC:H - parse_mf_symlink feeds an attacker-chosen link_len into hashing/string duplication over link_str, over-reading up to ~9KB past the kmalloc object; that is a large OOB read and can surface heap bytes via kstrndup if the MD5 check is satisfied.\nI:N - The defect is an out-of-bounds read of server-supplied symlink bytes into MD5/kstrndup paths, not an out-of-bounds write or control-flow corruption primitive, matching other SMB client OOB-read symlink parses.\nA:H - Reading thousands of bytes past a 1067-byte allocation can fault unmapped heap and oops the kernel, and a malicious server can trigger the malformed object repeatedly on path access."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "c69c1b6eaea1b3e1eecf7ad2fba0208ac4a11131", "lessThan": "3e582749e742e662a8e9bb37cffac62dccaaa1e2", "versionType": "git"}, {"status": "affected", "version": "c69c1b6eaea1b3e1eecf7ad2fba0208ac4a11131", "lessThan": "1316c28569a80ab3596eeab05bf5e01991e7e739", "versionType": "git"}, {"status": "affected", "version": "c69c1b6eaea1b3e1eecf7ad2fba0208ac4a11131", "lessThan": "eb5f51756944735ac70cd8bb38637cc202e29c91", "versionType": "git"}, {"status": "affected", "version": "c69c1b6eaea1b3e1eecf7ad2fba0208ac4a11131", "lessThan": "22d658c6c5affed10c8907e67160cef0b6c92186", "versionType": "git"}, {"status": "affected", "version": "c69c1b6eaea1b3e1eecf7ad2fba0208ac4a11131", "lessThan": "4e166a41180be2f1e66bbb6d46448e80a9a5ec05", "versionType": "git"}, {"status": "affected", "version": "c69c1b6eaea1b3e1eecf7ad2fba0208ac4a11131", "lessThan": "9901b07ba42b39266b34a888e48d7306fd707bee", "versionType": "git"}, {"status": "affected", "version": "c69c1b6eaea1b3e1eecf7ad2fba0208ac4a11131", "lessThan": "515e7ba11ef043d6febe69389949c8ef5f25e9d0", "versionType": "git"}, {"status": "affected", "version": "c69c1b6eaea1b3e1eecf7ad2fba0208ac4a11131", "lessThan": "64c4a37ac04eeb43c42d272f6e6c8c12bfcf4304", "versionType": "git"}], "programFiles": ["fs/cifs/link.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "2.6.37"}, {"status": "unaffected", "version": "0", "lessThan": "2.6.37", "versionType": "semver"}, {"status": "unaffected", "version": "4.9.311", "versionType": "semver", "lessThanOrEqual": "4.9.*"}, {"status": "unaffected", "version": "4.14.276", "versionType": "semver", "lessThanOrEqual": "4.14.*"}, {"status": "unaffected", "version": "4.19.239", "versionType": "semver", "lessThanOrEqual": "4.19.*"}, {"status": "unaffected", "version": "5.4.190", "versionType": "semver", "lessThanOrEqual": "5.4.*"}, {"status": "unaffected", "version": "5.10.112", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.35", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "5.17.4", "versionType": "semver", "lessThanOrEqual": "5.17.*"}, {"status": "unaffected", "version": "5.18", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["fs/cifs/link.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/3e582749e742e662a8e9bb37cffac62dccaaa1e2"}, {"url": "https://git.kernel.org/stable/c/1316c28569a80ab3596eeab05bf5e01991e7e739"}, {"url": "https://git.kernel.org/stable/c/eb5f51756944735ac70cd8bb38637cc202e29c91"}, {"url": "https://git.kernel.org/stable/c/22d658c6c5affed10c8907e67160cef0b6c92186"}, {"url": "https://git.kernel.org/stable/c/4e166a41180be2f1e66bbb6d46448e80a9a5ec05"}, {"url": "https://git.kernel.org/stable/c/9901b07ba42b39266b34a888e48d7306fd707bee"}, {"url": "https://git.kernel.org/stable/c/515e7ba11ef043d6febe69389949c8ef5f25e9d0"}, {"url": "https://git.kernel.org/stable/c/64c4a37ac04eeb43c42d272f6e6c8c12bfcf4304"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncifs: potential buffer overflow in handling symlinks\n\nSmatch printed a warning:\n\tarch/x86/crypto/poly1305_glue.c:198 poly1305_update_arch() error:\n\t__memcpy() 'dctx->buf' too small (16 vs u32max)\n\nIt's caused because Smatch marks 'link_len' as untrusted since it comes\nfrom sscanf(). Add a check to ensure that 'link_len' is not larger than\nthe size of the 'link_str' buffer."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "4.9.311", "versionStartIncluding": "2.6.37"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "4.14.276", "versionStartIncluding": "2.6.37"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "4.19.239", "versionStartIncluding": "2.6.37"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.4.190", "versionStartIncluding": "2.6.37"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.10.112", "versionStartIncluding": "2.6.37"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.35", "versionStartIncluding": "2.6.37"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.17.4", "versionStartIncluding": "2.6.37"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.18", "versionStartIncluding": "2.6.37"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:53:40.101Z"}}}, "cveMetadata": {"cveId": "CVE-2022-49058", "state": "PUBLISHED", "dateUpdated": "2026-08-05T08:53:40.101Z", "dateReserved": "2025-02-26T01:49:39.243Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2025-02-26T01:54:29.195Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

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Add a check to ensure that 'link_len' is not larger than\nthe size of the 'link_str' buffer."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: cifs: desbordamiento de b\u00fafer potencial al manejar enlaces simb\u00f3licos Smatch imprimi\u00f3 una advertencia: arch/x86/crypto/poly1305_glue.c:198 poly1305_update_arch() error: __memcpy() 'dctx->buf' demasiado peque\u00f1o (16 vs u32max) Esto se debe a que Smatch marca 'link_len' como no confiable ya que proviene de sscanf(). Agregue una verificaci\u00f3n para asegurarse de que 'link_len' no sea m\u00e1s grande que el tama\u00f1o del b\u00fafer 'link_str'."}], "id": "CVE-2022-49058", "lastModified": "2026-08-04T10:17:32.710", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.1, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.2, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2022-49058", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2025-10-01T19:50:01.997451Z", "version": "2.0.3"}}]}, "published": "2025-02-26T07:00:43.047", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1316c28569a80ab3596eeab05bf5e01991e7e739"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/22d658c6c5affed10c8907e67160cef0b6c92186"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3e582749e742e662a8e9bb37cffac62dccaaa1e2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/4e166a41180be2f1e66bbb6d46448e80a9a5ec05"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/515e7ba11ef043d6febe69389949c8ef5f25e9d0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/64c4a37ac04eeb43c42d272f6e6c8c12bfcf4304"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/9901b07ba42b39266b34a888e48d7306fd707bee"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/eb5f51756944735ac70cd8bb38637cc202e29c91"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-120"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-120"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"affected_release": [{"advisory": "RHSA-2023:2458", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-284.11.1.el9_2", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2023-05-09T00:00:00Z"}, {"advisory": "RHSA-2023:2458", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-284.11.1.el9_2", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2023-05-09T00:00:00Z"}], "bugzilla": {"description": "kernel: cifs: potential buffer overflow in handling symlinks", "id": "2348254", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2348254"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "verified"}, "cwe": "CWE-120", "details": ["In the Linux kernel, the following vulnerability has been resolved:\ncifs: potential buffer overflow in handling symlinks\nSmatch printed a warning:\narch/x86/crypto/poly1305_glue.c:198 poly1305_update_arch() error:\n__memcpy() 'dctx->buf' too small (16 vs u32max)\nIt's caused because Smatch marks 'link_len' as untrusted since it comes\nfrom sscanf(). Add a check to ensure that 'link_len' is not larger than\nthe size of the 'link_str' buffer.", "A buffer overflow vulnerability has been identified in the Linux kernel's Common Internet File System (CIFS) module, specifically within the parse_mf_symlink() function. This flaw is caused by insufficient input validation on the link_len value, which dictates the length of a symbolic link. An attacker could exploit this issue by providing an overly large symlink string, leading to a buffer overflow. This can result in memory corruption, system instability, or a denial-of-service condition."], "name": "CVE-2022-49058", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-02-26T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-49058\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-49058\nhttps://lore.kernel.org/linux-cve-announce/2025022653-CVE-2022-49058-5df2@gregkh/T"], "threat_severity": "Moderate"}

{}