CVE-2024-26828

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That means that because of type promotion, the comparison is\ndone as an unsigned and if we have negative bytes left the loop\ncontinues instead of ending."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H", "baseScore": 9.4, "baseSeverity": "CRITICAL"}, "scenarios": [{"lang": "en", "value": "AV:N - The vulnerable parser consumes an SMB2 IOCTL response body received over TCP/445 from the remote SMB server, so a malicious or compromised server (or a MITM on an unsigned connection) triggers it purely with network data. No local access to the victim is required.\nAC:L - The server controls both the response length and every `Next` field, so making `bytes_left` underflow is a single deterministic value choice (e.g. buf_len=152, Next=160) with no race, timing, or memory-layout condition outside the attacker's control.\nPR:N - The attacker is the server side of the connection and needs no credentials or privileges on the victim host; it simply answers the client's own FSCTL_QUERY_NETWORK_INTERFACE_INFO request with a crafted reply.\nUI:N - Beyond the mount path, `smb2_query_server_interfaces()` re-issues the query from a self-re-arming cifsiod delayed work every 600 seconds, and `smb2_reconnect()` issues it on every tcon reconnect, so an already-mounted share is attacked with zero user action.\nS:U - The out-of-bounds read and the resulting crash are entirely within the kernel's own security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The loop walks arbitrary kernel memory at an attacker-chosen stride and stores the OOB bytes as interface speeds and IPv4/IPv6 addresses in `ses->iface_list`, which is printed verbatim to world-readable `/proc/fs/cifs/DebugData` and used as multichannel connect targets \u2014 an unbounded, repeatable kernel heap disclosure primitive.\nI:L - There is no out-of-bounds write, but garbage harvested from unrelated kernel heap memory is installed as the session's authoritative interface list and drives which addresses the client opens additional SMB channels to, a limited unauthorized modification of client connection state.\nA:H - With `Next` up to 4 GiB the pointer walk dereferences unmapped memory and oopses the kernel, and the loop can only exit when an OOB `Next` is zero, additionally causing unbounded `iface_list`/`iface_count` growth from a workqueue context."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", 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However,\nthe problem is that \"bytes_left\" is type ssize_t while sizeof() is type\nsize_t. 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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/smb/client/smb2ops.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "3babdcb5f1809a9a41e31547a063dedf6bb44cca", "status": "affected", "version": "fe856be475f7cf5ffcde57341d175ce9fd09434b", "versionType": "git"}, {"lessThan": "7190353835b4a219abb70f90b06cdcae97f11512", "status": "affected", "version": "fe856be475f7cf5ffcde57341d175ce9fd09434b", "versionType": "git"}, {"lessThan": "f7ff1c89fb6e9610d2b01c1821727729e6609308", "status": "affected", "version": "fe856be475f7cf5ffcde57341d175ce9fd09434b", "versionType": "git"}, {"lessThan": "df2af9fdbc4ddde18a3371c4ca1a86596e8be301", "status": "affected", "version": "fe856be475f7cf5ffcde57341d175ce9fd09434b", "versionType": "git"}, {"lessThan": "cffe487026be13eaf37ea28b783d9638ab147204", "status": "affected", "version": "fe856be475f7cf5ffcde57341d175ce9fd09434b", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/smb/client/smb2ops.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.18"}, {"lessThan": "4.18", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.224", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.79", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.18", "versionType": "semver"}, {"lessThanOrEqual": "6.7.*", "status": "unaffected", "version": "6.7.6", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.8", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "93A31488-A7BB-4D16-B4B7-141095C7A9A4", "versionEndExcluding": "6.1.79", "versionStartIncluding": "4.18", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "BD961E49-FEDA-47CF-BF23-4D2BD942B4E0", "versionEndExcluding": "6.6.18", "versionStartIncluding": "6.2", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "C6D6A5C8-7308-42A9-8A72-ABF3DEA4BB82", "versionEndExcluding": "6.7.6", "versionStartIncluding": "6.7", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.8:rc1:*:*:*:*:*:*", "matchCriteriaId": "B9F4EA73-0894-400F-A490-3A397AB7A517", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.8:rc2:*:*:*:*:*:*", "matchCriteriaId": "056BD938-0A27-4569-B391-30578B309EE3", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.8:rc3:*:*:*:*:*:*", "matchCriteriaId": "F02056A5-B362-4370-9FF8-6F0BD384D520", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.8:rc4:*:*:*:*:*:*", "matchCriteriaId": "62075ACE-B2A0-4B16-829D-B3DA5AE5CC41", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncifs: fix underflow in parse_server_interfaces()\n\nIn this loop, we step through the buffer and after each item we check\nif the size_left is greater than the minimum size we need. However,\nthe problem is that \"bytes_left\" is type ssize_t while sizeof() is type\nsize_t. That means that because of type promotion, the comparison is\ndone as an unsigned and if we have negative bytes left the loop\ncontinues instead of ending."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: cifs: corrige el desbordamiento insuficiente en parse_server_interfaces() En este bucle, recorremos el b\u00fafer y despu\u00e9s de cada elemento comprobamos si size_left es mayor que el tama\u00f1o m\u00ednimo que necesitamos. Sin embargo, el problema es que \"bytes_left\" es del tipo ssize_t mientras que sizeof() es del tipo size_t. Eso significa que debido a la promoci\u00f3n de tipo, la comparaci\u00f3n se realiza sin firmar y si nos quedan bytes negativos, el ciclo contin\u00faa en lugar de finalizar."}], "id": "CVE-2024-26828", "lastModified": "2026-10-30T13:17:22.047", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.4, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.5, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.7, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.5, "impactScore": 5.2, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2024-26828", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-06-12T17:36:16.490979Z", "version": "2.0.3"}}]}, "published": "2024-04-17T10:15:09.300", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3babdcb5f1809a9a41e31547a063dedf6bb44cca"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/7190353835b4a219abb70f90b06cdcae97f11512"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/cffe487026be13eaf37ea28b783d9638ab147204"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/df2af9fdbc4ddde18a3371c4ca1a86596e8be301"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f7ff1c89fb6e9610d2b01c1821727729e6609308"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/7190353835b4a219abb70f90b06cdcae97f11512"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/cffe487026be13eaf37ea28b783d9638ab147204"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/df2af9fdbc4ddde18a3371c4ca1a86596e8be301"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f7ff1c89fb6e9610d2b01c1821727729e6609308"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-191"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2024:5363", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-427.31.1.el9_4", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2024-08-15T00:00:00Z"}, {"advisory": "RHSA-2024:5363", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-427.31.1.el9_4", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2024-08-15T00:00:00Z"}, {"advisory": "RHSA-2024:3461", "cpe": "cpe:/a:redhat:rhel_eus:9.2", "package": "kernel-0:5.14.0-284.67.1.el9_2", "product_name": "Red Hat Enterprise Linux 9.2 Extended Update Support", "release_date": "2024-05-29T00:00:00Z"}, {"advisory": "RHSA-2024:3460", "cpe": "cpe:/a:redhat:rhel_eus:9.2::nfv", "package": "kernel-rt-0:5.14.0-284.67.1.rt14.352.el9_2", "product_name": "Red Hat Enterprise Linux 9.2 Extended Update Support", "release_date": "2024-05-29T00:00:00Z"}], "bugzilla": {"description": "kernel: cifs: fix underflow in parse_server_interfaces()", "id": "2275600", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2275600"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.7", "cvss3_scoring_vector": "CVSS:3.1/AV:A/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:H", "status": "verified"}, "cwe": "CWE-191", "details": ["In the Linux kernel, the following vulnerability has been resolved:\ncifs: fix underflow in parse_server_interfaces()\nIn this loop, we step through the buffer and after each item we check\nif the size_left is greater than the minimum size we need. However,\nthe problem is that \"bytes_left\" is type ssize_t while sizeof() is type\nsize_t. That means that because of type promotion, the comparison is\ndone as an unsigned and if we have negative bytes left the loop\ncontinues instead of ending."], "name": "CVE-2024-26828", "package_state": [{"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": "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": "2024-04-17T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-26828\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-26828\nhttps://lore.kernel.org/linux-cve-announce/2024041703-CVE-2024-26828-b2be@gregkh/T"], "threat_severity": "Low"}

{}