bpf: Fix stackmap overflow check on 32-bit arches

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2024-26883
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2024-04-17 11:15:10 UTC
Updated2026-05-12 12:16:23 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: bpf: Fix stackmap overflow check on 32-bit arches The stackmap code relies on roundup_pow_of_two() to compute the number of hash buckets, and contains an overflow check by checking if the resulting value is 0. However, on 32-bit arches, the roundup code itself can overflow by doing a 32-bit left-shift of an unsigned long value, which is undefined behaviour, so it is not guaranteed to truncate neatly. This was triggered by syzbot on the DEVMAP_HASH type, which contains the same check, copied from the hashtab code. The commit in the fixes tag actually attempted to fix this, but the fix did not account for the UB, so the fix only works on CPUs where an overflow does result in a neat truncation to zero, which is not guaranteed. Checking the value before rounding does not have this problem.

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Problem Types: CWE-119

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Debian Debian Linux 10.0 All All All
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 063c722dd9d285d877e6fd499e753d6224f4c046 d0e214acc59145ce25113f617311aa79dda39cb3 git Not specified
CNA Linux Linux affected 7e3a6b820535eb395784060ae26c5af579528fa0 21e5fa4688e1a4d3db6b72216231b24232f75c1d git Not specified
CNA Linux Linux affected 8032bf2af9ce26b3a362b9711d15f626ab946a74 15641007df0f0d35fa28742b25c2a7db9dcd6895 git Not specified
CNA Linux Linux affected 6183f4d3a0a2ad230511987c6c362ca43ec0055f ca1f06e72dec41ae4f76e7b1a8a97265447b46ae git Not specified
CNA Linux Linux affected 6183f4d3a0a2ad230511987c6c362ca43ec0055f f06899582ccee09bd85d0696290e3eaca9aa042d git Not specified
CNA Linux Linux affected 6183f4d3a0a2ad230511987c6c362ca43ec0055f 7070b274c7866a4c5036f8d54fcaf315c64ac33a git Not specified
CNA Linux Linux affected 6183f4d3a0a2ad230511987c6c362ca43ec0055f 43f798b9036491fb014b55dd61c4c5c3193267d0 git Not specified
CNA Linux Linux affected 6183f4d3a0a2ad230511987c6c362ca43ec0055f 0971126c8164abe2004b8536b49690a0d6005b0a git Not specified
CNA Linux Linux affected 6183f4d3a0a2ad230511987c6c362ca43ec0055f 7a4b21250bf79eef26543d35bd390448646c536b git Not specified
CNA Linux Linux affected 253150830a012adfccf90afcebae8fda5b05a80f git Not specified
CNA Linux Linux affected 766107351731ae223ebf60ca22bdfeb47ce6acc8 git Not specified
CNA Linux Linux affected 5.11 Not specified
CNA Linux Linux unaffected 5.11 semver Not specified
CNA Linux Linux unaffected 4.19.311 4.19.* semver Not specified
CNA Linux Linux unaffected 5.4.273 5.4.* semver Not specified
CNA Linux Linux unaffected 5.10.214 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.153 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.83 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.23 6.6.* semver Not specified
CNA Linux Linux unaffected 6.7.11 6.7.* semver Not specified
CNA Linux Linux unaffected 6.8.2 6.8.* semver Not specified
CNA Linux Linux unaffected 6.9 * original_commit_for_fix Not specified
ADP Siemens SIMATIC S7-1500 TM MFP - GNU/Linux Subsystem affected * custom Not specified

References

ReferenceSourceLinkTags
lists.debian.org/debian-lts-announce/2024/06/msg00017.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org Mailing List
git.kernel.org/stable/c/d0e214acc59145ce25113f617311aa79dda39cb3 af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
git.kernel.org/stable/c/0971126c8164abe2004b8536b49690a0d6005b0a af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
cert-portal.siemens.com/productcert/html/ssa-265688.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
git.kernel.org/stable/c/7070b274c7866a4c5036f8d54fcaf315c64ac33a af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
git.kernel.org/stable/c/f06899582ccee09bd85d0696290e3eaca9aa042d af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
git.kernel.org/stable/c/15641007df0f0d35fa28742b25c2a7db9dcd6895 af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
git.kernel.org/stable/c/7a4b21250bf79eef26543d35bd390448646c536b af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
git.kernel.org/stable/c/43f798b9036491fb014b55dd61c4c5c3193267d0 af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
lists.debian.org/debian-lts-announce/2024/06/msg00020.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org Mailing List
git.kernel.org/stable/c/ca1f06e72dec41ae4f76e7b1a8a97265447b46ae af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
git.kernel.org/stable/c/21e5fa4688e1a4d3db6b72216231b24232f75c1d af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
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