CVE-2024-26883
bpf: Fix stackmap overflow check on 32-bit arches
HIGH 7.8
At a glance
- Source
- NVD
- EPSS
- EPSS 0.25 % · percentile 17 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Modified
Description
In 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.
Weaknesses (CWE)
- CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer
References
- https://git.kernel.org/stable/c/d0e214acc59145ce25113f617311aa79dda39cb3
- https://git.kernel.org/stable/c/21e5fa4688e1a4d3db6b72216231b24232f75c1d
- https://git.kernel.org/stable/c/15641007df0f0d35fa28742b25c2a7db9dcd6895
- https://git.kernel.org/stable/c/ca1f06e72dec41ae4f76e7b1a8a97265447b46ae
- https://git.kernel.org/stable/c/f06899582ccee09bd85d0696290e3eaca9aa042d
- https://git.kernel.org/stable/c/7070b274c7866a4c5036f8d54fcaf315c64ac33a
- https://git.kernel.org/stable/c/43f798b9036491fb014b55dd61c4c5c3193267d0
- https://git.kernel.org/stable/c/0971126c8164abe2004b8536b49690a0d6005b0a
- https://git.kernel.org/stable/c/7a4b21250bf79eef26543d35bd390448646c536b
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html
- https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | Linux |
| CVSS 3.1 | HIGH 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | NVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary) |
| CVSS 3.1 | HIGH 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | NVD · nvd@nist.gov (Primary) |
European references
- ENISA EUVD · EUVD-2024-24145
- GCVE · GCVE-0-2024-26883
CERT-FR advisories
- CERTFR-2024-AVI-0717 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0645 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0633 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0611 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0580 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0546 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0527 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0526 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0458 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0440 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0420 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0381 — Multiples vulnérabilités dans le noyau Linux de Debian · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 4.9.258 < 4.10cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 4.14.222 < 4.15cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 4.19.177 < 4.19.311cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.4.99 < 5.4.273cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.10.17 < 5.10.214cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.11 < 5.15.153cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.16 < 6.1.83cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.2 < 6.6.23cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.7 < 6.7.11cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.8 < 6.8.2
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected 063c722dd9d285d877e6fd499e753d6224f4c046 < d0e214acc59145ce25113f617311aa79dda39cb3 ; affected 7e3a6b820535eb395784060ae26c5af579528fa0 < 21e5fa4688e1a4d3db6b72216231b24232f75c1d ; affected 8032bf2af9ce26b3a362b9711d15f626ab946a74 < 15641007df0f0d35fa28742b25c2a7db9dcd6895 ; affected 6183f4d3a0a2ad230511987c6c362ca43ec0055f < ca1f06e72dec41ae4f76e7b1a8a97265447b46ae ; affected 6183f4d3a0a2ad230511987c6c362ca43ec0055f < f06899582ccee09bd85d0696290e3eaca9aa042d ; affected 6183f4d3a0a2ad230511987c6c362ca43ec0055f < 7070b274c7866a4c5036f8d54fcaf315c64ac33a |
| Linux · Linux | affected 5.11 ; unaffected 0 < 5.11 ; unaffected 4.19.311 ≤ 4.19.* ; unaffected 5.4.273 ≤ 5.4.* ; unaffected 5.10.214 ≤ 5.10.* ; unaffected 5.15.153 ≤ 5.15.* |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |