CVE-2024-44965x86/mm: Fix pti_clone_pgtable() alignment assumption
- 5.5MediumCVSS base score
- 0.22%Exploitation in 30 daysEPSS · top 87% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By Linux
- 14 days later
· 14 days later
Published
- 2 years later
· 2 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.22% · top 87% of all CVEs (14 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected 16a3fe634f6a568c6234b8747e5d50487fed3526 – < 18da1b27ce16a14a9b636af9232acb4fb24f4c9e
- affected 16a3fe634f6a568c6234b8747e5d50487fed3526 – < 25a727233a40a9b33370eec9f0cad67d8fd312f8
- affected 16a3fe634f6a568c6234b8747e5d50487fed3526 – < d00c9b4bbc442d99e1dafbdfdab848bc1ead73f6
- affected 16a3fe634f6a568c6234b8747e5d50487fed3526 – < 4d143ae782009b43b4f366402e5c37f59d4e4346
- affected 16a3fe634f6a568c6234b8747e5d50487fed3526 – < 5c580c1050bcbc15c3e78090859d798dcf8c9763
- affected 16a3fe634f6a568c6234b8747e5d50487fed3526 – < ca07aab70dd3b5e7fddb62d7a6ecd7a7d6d0b2ed
- affected 16a3fe634f6a568c6234b8747e5d50487fed3526 – < df3eecb5496f87263d171b254ca6e2758ab3c35c
- affected 16a3fe634f6a568c6234b8747e5d50487fed3526 – < 41e71dbb0e0a0fe214545fe64af031303a08524c
- affected 4.19
- unaffected < 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.*
- unaffected 6.1.105 – ≤ 6.1.*
- unaffected 6.6.46 – ≤ 6.6.*
- unaffected 6.10.5 – ≤ 6.10.*
- unaffected 6.11 – ≤ *
References
References12
- https://git.kernel.org/stable/c/18da1b27ce16a14a9b636af9232acb4fb24f4c9e (opens in a new tab)
- https://git.kernel.org/stable/c/25a727233a40a9b33370eec9f0cad67d8fd312f8 (opens in a new tab)
- https://git.kernel.org/stable/c/d00c9b4bbc442d99e1dafbdfdab848bc1ead73f6 (opens in a new tab)
- https://git.kernel.org/stable/c/4d143ae782009b43b4f366402e5c37f59d4e4346 (opens in a new tab)
- https://git.kernel.org/stable/c/5c580c1050bcbc15c3e78090859d798dcf8c9763 (opens in a new tab)
- https://git.kernel.org/stable/c/ca07aab70dd3b5e7fddb62d7a6ecd7a7d6d0b2ed (opens in a new tab)
- https://git.kernel.org/stable/c/df3eecb5496f87263d171b254ca6e2758ab3c35c (opens in a new tab)
- https://git.kernel.org/stable/c/41e71dbb0e0a0fe214545fe64af031303a08524c (opens in a new tab)
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html (opens in a new tab)
- https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-355557.html (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2024-41167 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2024-44965)Record last updated .