x86/mm: Fix pti_clone_pgtable() alignment assumption (Linux Linux)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.22 % · percentile 13 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Modified
Description
In the Linux kernel, the following vulnerability has been resolved: x86/mm: Fix pti_clone_pgtable() alignment assumption Guenter reported dodgy crashes on an i386-nosmp build using GCC-11 that had the form of endless traps until entry stack exhaust and then #DF from the stack guard. It turned out that pti_clone_pgtable() had alignment assumptions on the start address, notably it hard assumes start is PMD aligned. This is true on x86_64, but very much not true on i386. These assumptions can cause the end condition to malfunction, leading to a 'short' clone. Guess what happens when the user mapping has a short copy of the entry text? Use the correct increment form for addr to avoid alignment assumptions.
References
- https://git.kernel.org/stable/c/18da1b27ce16a14a9b636af9232acb4fb24f4c9e
- https://git.kernel.org/stable/c/25a727233a40a9b33370eec9f0cad67d8fd312f8
- https://git.kernel.org/stable/c/d00c9b4bbc442d99e1dafbdfdab848bc1ead73f6
- https://git.kernel.org/stable/c/4d143ae782009b43b4f366402e5c37f59d4e4346
- https://git.kernel.org/stable/c/5c580c1050bcbc15c3e78090859d798dcf8c9763
- https://git.kernel.org/stable/c/ca07aab70dd3b5e7fddb62d7a6ecd7a7d6d0b2ed
- https://git.kernel.org/stable/c/df3eecb5496f87263d171b254ca6e2758ab3c35c
- https://git.kernel.org/stable/c/41e71dbb0e0a0fe214545fe64af031303a08524c
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
- https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html
- https://cert-portal.siemens.com/productcert/html/ssa-355557.html
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | MEDIUM 5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H | NVD · nvd@nist.gov (Primary) |
European references
- ENISA EUVD · EUVD-2024-41167
- GCVE · GCVE-0-2024-44965
CERT-FR advisories
- CERTFR-2025-AVI-0677 — Multiples vulnérabilités dans les produits Siemens · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0022 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0002 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
- CERTFR-2024-AVI-1080 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2024-AVI-1013 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0997 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0957 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0872 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0870 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 4.19 < 4.19.320cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 4.20 < 5.4.282cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.5 < 5.10.224cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.11 < 5.15.165cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.16 < 6.1.105cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.2 < 6.6.46cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.7 < 6.10.5cpe:2.3:o:linux:linux_kernel:6.11:rc1:*:*:*:*:*:*
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected 16a3fe634f6a568c6234b8747e5d50487fed3526 < 18da1b27ce16a14a9b636af9232acb4fb24f4c9e ; affected 16a3fe634f6a568c6234b8747e5d50487fed3526 < 25a727233a40a9b33370eec9f0cad67d8fd312f8 ; affected 16a3fe634f6a568c6234b8747e5d50487fed3526 < d00c9b4bbc442d99e1dafbdfdab848bc1ead73f6 ; affected 16a3fe634f6a568c6234b8747e5d50487fed3526 < 4d143ae782009b43b4f366402e5c37f59d4e4346 ; affected 16a3fe634f6a568c6234b8747e5d50487fed3526 < 5c580c1050bcbc15c3e78090859d798dcf8c9763 ; affected 16a3fe634f6a568c6234b8747e5d50487fed3526 < ca07aab70dd3b5e7fddb62d7a6ecd7a7d6d0b2ed |
| Linux · Linux | affected 4.19 ; unaffected 0 < 4.19 ; unaffected 4.19.320 ≤ 4.19.* ; unaffected 5.4.282 ≤ 5.4.* ; unaffected 5.10.224 ≤ 5.10.* ; unaffected 5.15.165 ≤ 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 |