CVE-2024-26883

{"dataType": "CVE_RECORD", "cveMetadata": {"cveId": "CVE-2024-26883", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-02-19T14:20:24.185Z", "datePublished": "2024-04-17T10:27:39.036Z", "dateUpdated": "2026-10-15T00:39:05.259Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:28:08.431Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix stackmap overflow check on 32-bit arches\n\nThe stackmap code relies on roundup_pow_of_two() to compute the number\nof hash buckets, and contains an overflow check by checking if the\nresulting value is 0. However, on 32-bit arches, the roundup code itself\ncan overflow by doing a 32-bit left-shift of an unsigned long value,\nwhich is undefined behaviour, so it is not guaranteed to truncate\nneatly. This was triggered by syzbot on the DEVMAP_HASH type, which\ncontains the same check, copied from the hashtab code.\n\nThe commit in the fixes tag actually attempted to fix this, but the fix\ndid not account for the UB, so the fix only works on CPUs where an\noverflow does result in a neat truncation to zero, which is not\nguaranteed. Checking the value before rounding does not have this\nproblem."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The vulnerability is reached solely through the bpf(BPF_MAP_CREATE) syscall from a local process; no network or remote peer data is involved in stackmap creation.\nAC:L - A single syscall with max_entries > 0x80000000 deterministically bypasses the overflow check on a 32-bit kernel \u2014 no race, no memory-layout precondition, and the attacker fully controls max_entries and value_size (hence the OOB write stride).\nPR:L - Creating a BPF_MAP_TYPE_STACK_TRACE map requires CAP_BPF (bpf_capable()/bpf_token_capable()), a delegated capability routinely granted to unprivileged observability agents, container runtimes and BPF-token-holding workloads rather than full root.\nUI:N - The attacker triggers the entire flaw with its own syscall; no victim action, mount, or file open is needed.\nS:U - The corruption is confined to kernel memory within the same security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The truncated allocation leaves pcpu_freelist nodes pointing into arbitrary kernel memory, which subsequent bpf_get_stackid()/map lookups copy back to userspace, and the resulting heap corruption is generally leverageable for arbitrary kernel memory disclosure.\nI:H - pcpu_freelist_populate() performs ~2^31 pointer writes at an attacker-chosen stride past a tiny (attacker-sized) allocation, an unbounded out-of-bounds write of kernel pointer values that is exploitable for control-flow hijacking.\nA:H - The wild writes sweep gigabytes of kernel address space and reliably corrupt slab metadata and unmapped pages, guaranteeing an oops/panic; even on trees where the write is avoided the path is a hard map-creation failure."}]}], "affected": [{"product": "Linux", "vendor": "Linux", 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"semver"}, {"version": "5.10.17", "lessThan": "5.10.214", "status": "affected", "versionType": "semver"}, {"version": "4.9.258", "lessThan": "4.10", "status": "affected", "versionType": "semver"}, {"version": "4.14.222", "lessThan": "4.15", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/bpf/stackmap.c"], "versions": [{"version": "5.11", "status": "affected"}, {"version": "0", "lessThan": "5.11", "status": "unaffected", "versionType": "semver"}, {"version": "4.19.311", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.4.273", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.214", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.153", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.83", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.23", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.7.11", "lessThanOrEqual": "6.7.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.8.2", "lessThanOrEqual": "6.8.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.9", "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": "4.19.177", "versionEndExcluding": "4.19.311"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4.99", "versionEndExcluding": "5.4.273"}, {"vulnerable": true, "criteria": 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no network or remote peer data is involved in stackmap creation.\nAC:L - A single syscall with max_entries > 0x80000000 deterministically bypasses the overflow check on a 32-bit kernel \u2014 no race, no memory-layout precondition, and the attacker fully controls max_entries and value_size (hence the OOB write stride).\nPR:L - Creating a BPF_MAP_TYPE_STACK_TRACE map requires CAP_BPF (bpf_capable()/bpf_token_capable()), a delegated capability routinely granted to unprivileged observability agents, container runtimes and BPF-token-holding workloads rather than full root.\nUI:N - The attacker triggers the entire flaw with its own syscall; no victim action, mount, or file open is needed.\nS:U - The corruption is confined to kernel memory within the same security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The truncated allocation leaves pcpu_freelist nodes pointing into arbitrary kernel memory, which subsequent bpf_get_stackid()/map lookups copy back to userspace, and the resulting heap corruption is generally leverageable for arbitrary kernel memory disclosure.\nI:H - pcpu_freelist_populate() performs ~2^31 pointer writes at an attacker-chosen stride past a tiny (attacker-sized) allocation, an unbounded out-of-bounds write of kernel pointer values that is exploitable for control-flow hijacking.\nA:H - The wild writes sweep gigabytes of kernel address space and reliably corrupt slab metadata and unmapped pages, guaranteeing an oops/panic; even on trees where the write is avoided the path is a hard map-creation failure."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "063c722dd9d285d877e6fd499e753d6224f4c046", "lessThan": "d0e214acc59145ce25113f617311aa79dda39cb3", "versionType": "git"}, {"status": "affected", "version": "7e3a6b820535eb395784060ae26c5af579528fa0", "lessThan": "21e5fa4688e1a4d3db6b72216231b24232f75c1d", "versionType": "git"}, {"status": "affected", "version": "8032bf2af9ce26b3a362b9711d15f626ab946a74", "lessThan": "15641007df0f0d35fa28742b25c2a7db9dcd6895", "versionType": "git"}, {"status": "affected", "version": "6183f4d3a0a2ad230511987c6c362ca43ec0055f", "lessThan": "ca1f06e72dec41ae4f76e7b1a8a97265447b46ae", "versionType": "git"}, {"status": "affected", "version": "6183f4d3a0a2ad230511987c6c362ca43ec0055f", "lessThan": "f06899582ccee09bd85d0696290e3eaca9aa042d", "versionType": "git"}, {"status": "affected", "version": "6183f4d3a0a2ad230511987c6c362ca43ec0055f", "lessThan": "7070b274c7866a4c5036f8d54fcaf315c64ac33a", "versionType": "git"}, {"status": "affected", "version": "6183f4d3a0a2ad230511987c6c362ca43ec0055f", "lessThan": "43f798b9036491fb014b55dd61c4c5c3193267d0", "versionType": "git"}, {"status": "affected", "version": "6183f4d3a0a2ad230511987c6c362ca43ec0055f", "lessThan": "0971126c8164abe2004b8536b49690a0d6005b0a", "versionType": "git"}, {"status": "affected", "version": "6183f4d3a0a2ad230511987c6c362ca43ec0055f", "lessThan": "7a4b21250bf79eef26543d35bd390448646c536b", "versionType": "git"}, {"status": "affected", "version": "253150830a012adfccf90afcebae8fda5b05a80f", "versionType": "git"}, {"status": "affected", "version": "766107351731ae223ebf60ca22bdfeb47ce6acc8", "versionType": "git"}, {"status": "affected", "version": "4.19.177", "lessThan": "4.19.311", "versionType": "semver"}, {"status": "affected", "version": "5.4.99", "lessThan": "5.4.273", "versionType": "semver"}, {"status": "affected", "version": "5.10.17", "lessThan": "5.10.214", "versionType": "semver"}, {"status": "affected", "version": "4.9.258", "lessThan": "4.10", "versionType": "semver"}, {"status": "affected", "version": "4.14.222", "lessThan": "4.15", "versionType": "semver"}], "programFiles": ["kernel/bpf/stackmap.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.11"}, {"status": "unaffected", "version": "0", "lessThan": "5.11", "versionType": "semver"}, {"status": "unaffected", "version": "4.19.311", "versionType": "semver", "lessThanOrEqual": "4.19.*"}, {"status": "unaffected", "version": "5.4.273", "versionType": "semver", "lessThanOrEqual": "5.4.*"}, {"status": "unaffected", "version": "5.10.214", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.153", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.83", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.23", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.7.11", "versionType": "semver", "lessThanOrEqual": "6.7.*"}, {"status": "unaffected", "version": "6.8.2", "versionType": "semver", "lessThanOrEqual": "6.8.*"}, {"status": "unaffected", "version": "6.9", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["kernel/bpf/stackmap.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/d0e214acc59145ce25113f617311aa79dda39cb3"}, {"url": "https://git.kernel.org/stable/c/21e5fa4688e1a4d3db6b72216231b24232f75c1d"}, {"url": "https://git.kernel.org/stable/c/15641007df0f0d35fa28742b25c2a7db9dcd6895"}, {"url": "https://git.kernel.org/stable/c/ca1f06e72dec41ae4f76e7b1a8a97265447b46ae"}, {"url": "https://git.kernel.org/stable/c/f06899582ccee09bd85d0696290e3eaca9aa042d"}, {"url": "https://git.kernel.org/stable/c/7070b274c7866a4c5036f8d54fcaf315c64ac33a"}, {"url": "https://git.kernel.org/stable/c/43f798b9036491fb014b55dd61c4c5c3193267d0"}, {"url": "https://git.kernel.org/stable/c/0971126c8164abe2004b8536b49690a0d6005b0a"}, {"url": "https://git.kernel.org/stable/c/7a4b21250bf79eef26543d35bd390448646c536b"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix stackmap overflow check on 32-bit arches\n\nThe stackmap code relies on roundup_pow_of_two() to compute the number\nof hash buckets, and contains an overflow check by checking if the\nresulting value is 0. However, on 32-bit arches, the roundup code itself\ncan overflow by doing a 32-bit left-shift of an unsigned long value,\nwhich is undefined behaviour, so it is not guaranteed to truncate\nneatly. This was triggered by syzbot on the DEVMAP_HASH type, which\ncontains the same check, copied from the hashtab code.\n\nThe commit in the fixes tag actually attempted to fix this, but the fix\ndid not account for the UB, so the fix only works on CPUs where an\noverflow does result in a neat truncation to zero, which is not\nguaranteed. 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However, on 32-bit arches, the roundup code itself\ncan overflow by doing a 32-bit left-shift of an unsigned long value,\nwhich is undefined behaviour, so it is not guaranteed to truncate\nneatly. This was triggered by syzbot on the DEVMAP_HASH type, which\ncontains the same check, copied from the hashtab code.\n\nThe commit in the fixes tag actually attempted to fix this, but the fix\ndid not account for the UB, so the fix only works on CPUs where an\noverflow does result in a neat truncation to zero, which is not\nguaranteed. Checking the value before rounding does not have this\nproblem."}, {"lang": "es", "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: bpf: corrige la verificaci\u00f3n de desbordamiento del mapa de pila en arcos de 32 bits. El c\u00f3digo del mapa de pila se basa en roundup_pow_of_two() para calcular el n\u00famero de dep\u00f3sitos de hash y contiene una verificaci\u00f3n de desbordamiento verificando si el valor resultante es 0. Sin embargo, en arcos de 32 bits, el c\u00f3digo de resumen en s\u00ed puede desbordarse al realizar un desplazamiento hacia la izquierda de 32 bits de un valor largo sin signo, lo cual es un comportamiento indefinido, por lo que no se garantiza que se trunque claramente. Esto fue activado por syzbot en el tipo DEVMAP_HASH, que contiene la misma verificaci\u00f3n, copiada del c\u00f3digo hashtab. La confirmaci\u00f3n en la etiqueta de correcciones en realidad intent\u00f3 solucionar este problema, pero la correcci\u00f3n no tuvo en cuenta la UB, por lo que la correcci\u00f3n solo funciona en CPU donde un desbordamiento resulta en un truncamiento claro a cero, lo cual no est\u00e1 garantizado. Verificar el valor antes de redondear no tiene este problema."}], "id": "CVE-2024-26883", "lastModified": "2026-10-15T01:17:28.667", "metrics": {"cvssMetricV31": [{"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": "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"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2024-26883", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-09-10T15:48:22.381696Z", "version": "2.0.3"}}]}, "published": "2024-04-17T11:15:10.113", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0971126c8164abe2004b8536b49690a0d6005b0a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/15641007df0f0d35fa28742b25c2a7db9dcd6895"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/21e5fa4688e1a4d3db6b72216231b24232f75c1d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/43f798b9036491fb014b55dd61c4c5c3193267d0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/7070b274c7866a4c5036f8d54fcaf315c64ac33a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/7a4b21250bf79eef26543d35bd390448646c536b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ca1f06e72dec41ae4f76e7b1a8a97265447b46ae"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d0e214acc59145ce25113f617311aa79dda39cb3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f06899582ccee09bd85d0696290e3eaca9aa042d"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0971126c8164abe2004b8536b49690a0d6005b0a"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/15641007df0f0d35fa28742b25c2a7db9dcd6895"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/21e5fa4688e1a4d3db6b72216231b24232f75c1d"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/43f798b9036491fb014b55dd61c4c5c3193267d0"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/7070b274c7866a4c5036f8d54fcaf315c64ac33a"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/7a4b21250bf79eef26543d35bd390448646c536b"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ca1f06e72dec41ae4f76e7b1a8a97265447b46ae"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d0e214acc59145ce25113f617311aa79dda39cb3"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f06899582ccee09bd85d0696290e3eaca9aa042d"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List"], "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List"], "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html"}, {"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "url": "https://cert-portal.siemens.com/productcert/html/ssa-265688.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-119"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: bpf: Fix stackmap overflow check on 32-bit arches", "id": "2275684", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2275684"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.7", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-121", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nbpf: Fix stackmap overflow check on 32-bit arches\nThe stackmap code relies on roundup_pow_of_two() to compute the number\nof hash buckets, and contains an overflow check by checking if the\nresulting value is 0. However, on 32-bit arches, the roundup code itself\ncan overflow by doing a 32-bit left-shift of an unsigned long value,\nwhich is undefined behaviour, so it is not guaranteed to truncate\nneatly. This was triggered by syzbot on the DEVMAP_HASH type, which\ncontains the same check, copied from the hashtab code.\nThe commit in the fixes tag actually attempted to fix this, but the fix\ndid not account for the UB, so the fix only works on CPUs where an\noverflow does result in a neat truncation to zero, which is not\nguaranteed. Checking the value before rounding does not have this\nproblem."], "name": "CVE-2024-26883", "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": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "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": "2024-04-17T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-26883\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-26883\nhttps://lore.kernel.org/linux-cve-announce/2024041741-CVE-2024-26883-1fc4@gregkh/T"], "threat_severity": "Low"}

{}