CVE-2022-49770

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And then it'll\nput it twice and could cause random use-after-free, BUG_ON, etc\nissues."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL"}, "scenarios": [{"lang": "en", "value": "AV:N - Corrupted snap traces reach ceph_update_snap_trace() via MDS-originated CephFS messages (CEPH_MSG_CLIENT_SNAP, cap IMPORT snaptrace, reply snapblobs) over the TCP messenger; a malicious, compromised, or on-path MDS triggers the bug with network traffic alone.\nAC:L - A malicious MDS can craft a multi-realm snap trace whose first realm decodes successfully (setting first_realm) and whose subsequent record fails ceph_decode_need, reliably hitting the double-put path with no race or layout dependency.\nPR:N - Exploitation needs no privileges on the victim client\u2014the attacking MDS peer requires no local account or capability, matching other CephFS client MDS-message bugs scored PR:N.\nUI:N - With CephFS already mounted (normal deployment state), the MDS can unilaterally push snap/cap messages during snapshot ops or reconnect without any further victim action at exploit time.\nS:U - Impact stays inside the client kernel and CephFS mount authority; there is no VM escape, IOMMU bypass, or other cross-boundary effect.\nC:H - Double-putting the snap realm frees struct ceph_snap_realm while inodes and hierarchy links retain dangling pointers, yielding a classic heap UAF read primitive over attacker-reclaimable slab memory.\nI:H - The same UAF write path (nref/list updates on a recycled snap_realm, plus later use via get_quota_realm/ceph_get_snap_realm) enables heap corruption and control-flow hijack primitives.\nA:H - Production reports show LIST_POISON GPFs and client hangs requiring reboot after the double-put, and any UAF of this form can oops or panic the kernel."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/ceph/snap.c"], "versions": [{"version": "982d6011bc30a26e8a3d546e0e7fc7db2c255d85", "lessThan": "274e4c79a3a2a24fba7cfe0e41113f1138785c37", "status": "affected", "versionType": "git"}, {"version": "982d6011bc30a26e8a3d546e0e7fc7db2c255d85", "lessThan": "cb7495fe957526555782ce0723f79ce92a6db22e", "status": "affected", "versionType": "git"}, {"version": "982d6011bc30a26e8a3d546e0e7fc7db2c255d85", "lessThan": "044bc6d3c2c0e9090b0841e7b723875756534b45", "status": "affected", "versionType": "git"}, {"version": "982d6011bc30a26e8a3d546e0e7fc7db2c255d85", "lessThan": "2f6e2de3a5289004650118b61f138fe7c28e1905", "status": "affected", "versionType": "git"}, {"version": "982d6011bc30a26e8a3d546e0e7fc7db2c255d85", "lessThan": "fd879c83e87735ab8f00ef7755752cf0cbae24b2", "status": "affected", "versionType": "git"}, {"version": "982d6011bc30a26e8a3d546e0e7fc7db2c255d85", "lessThan": "51884d153f7ec85e18d607b2467820a90e0f4359", "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/ceph/snap.c"], "versions": [{"version": "4.0", "status": "affected"}, {"version": "0", "lessThan": "4.0", "status": "unaffected", "versionType": "semver"}, {"version": "4.19.268", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.4.226", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.157", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.81", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.0.10", "lessThanOrEqual": "6.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1", "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": "4.0", "versionEndExcluding": "4.19.268"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.0", "versionEndExcluding": "5.4.226"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.0", "versionEndExcluding": "5.10.157"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.0", "versionEndExcluding": "5.15.81"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.0", "versionEndExcluding": "6.0.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.0", "versionEndExcluding": "6.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/274e4c79a3a2a24fba7cfe0e41113f1138785c37"}, {"url": "https://git.kernel.org/stable/c/cb7495fe957526555782ce0723f79ce92a6db22e"}, {"url": "https://git.kernel.org/stable/c/044bc6d3c2c0e9090b0841e7b723875756534b45"}, {"url": "https://git.kernel.org/stable/c/2f6e2de3a5289004650118b61f138fe7c28e1905"}, {"url": "https://git.kernel.org/stable/c/fd879c83e87735ab8f00ef7755752cf0cbae24b2"}, {"url": "https://git.kernel.org/stable/c/51884d153f7ec85e18d607b2467820a90e0f4359"}], "title": "ceph: avoid putting the realm twice when decoding snaps fails", "x_generator": {"engine": "bippy-1.2.0"}}}}

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And then it'll\nput it twice and could cause random use-after-free, BUG_ON, etc\nissues."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ceph: evita repetir el dominio cuando falla la decodificaci\u00f3n de snaps. Al fallar la decodificaci\u00f3n de snaps, puede que \"first_realm\" y \"realm\" apunten a la misma memoria de snaprealm. En ese caso, lo repetir\u00e1, lo que podr\u00eda causar problemas aleatorios de use-after-free, BUG_ON, etc."}], "id": "CVE-2022-49770", "lastModified": "2026-08-15T13:17:28.167", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "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"}]}, "published": "2025-05-01T15:15:59.920", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/044bc6d3c2c0e9090b0841e7b723875756534b45"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/274e4c79a3a2a24fba7cfe0e41113f1138785c37"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2f6e2de3a5289004650118b61f138fe7c28e1905"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/51884d153f7ec85e18d607b2467820a90e0f4359"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/cb7495fe957526555782ce0723f79ce92a6db22e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/fd879c83e87735ab8f00ef7755752cf0cbae24b2"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: ceph: avoid putting the realm twice when decoding snaps fails", "id": "2363493", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2363493"}, "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": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nceph: avoid putting the realm twice when decoding snaps fails\nWhen decoding the snaps fails it maybe leaving the 'first_realm'\nand 'realm' pointing to the same snaprealm memory. And then it'll\nput it twice and could cause random use-after-free, BUG_ON, etc\nissues."], "name": "CVE-2022-49770", "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": "Not affected", "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": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-05-01T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-49770\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-49770\nhttps://lore.kernel.org/linux-cve-announce/2025050115-CVE-2022-49770-0b74@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-06-23T09:16:30.336640+00:00", "updated": "2025-06-23T09:16:30.336744+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}