CVE-2024-40948mm/page_table_check: fix crash on ZONE_DEVICE
- 5.5MediumCVSS base score
- 0.25%Exploitation in 30 daysEPSS · top 84% 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: mm/page_table_check: fix crash on ZONE_DEVICE Not all pages may apply to pgtable check. One example is ZONE_DEVICE pages: they map PFNs directly, and they don't allocate page_ext at all even if there's struct page around. One may reference devm_memremap_pages(). When both ZONE_DEVICE and page-table-check enabled, then try to map some dax memories, one can trigger kernel bug constantly now when the kernel was trying to inject some pfn maps on the dax device: kernel BUG at mm/page_table_check.c:55! While it's pretty legal to use set_pxx_at() for ZONE_DEVICE pages for page fault resolutions, skip all the checks if page_ext doesn't even exist in pgtable checker, which applies to ZONE_DEVICE but maybe more.
Timeline
ID reserved
By Linux
Published
- 22 months later
· 22 months 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)
- 0.25% · top 84% of all CVEs (12 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 df4e817b710809425d899340dbfa8504a3ca4ba5 – < 51897f99351fff7b57f4f141940fa93b4e90fd2b
- affected df4e817b710809425d899340dbfa8504a3ca4ba5 – < 84d3549d54f5ff9fa3281257be3019386f51d1a0
- affected df4e817b710809425d899340dbfa8504a3ca4ba5 – < dec2382247860d2134c8d41e103e26460c099629
- affected df4e817b710809425d899340dbfa8504a3ca4ba5 – < 8bb592c2eca8fd2bc06db7d80b38da18da4a2f43
- affected 5.17
- unaffected < 5.17
- unaffected 6.1.96 – ≤ 6.1.*
- unaffected 6.6.36 – ≤ 6.6.*
- unaffected 6.9.7 – ≤ 6.9.*
- unaffected 6.10 – ≤ *
References
References5
- https://git.kernel.org/stable/c/51897f99351fff7b57f4f141940fa93b4e90fd2b (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/84d3549d54f5ff9fa3281257be3019386f51d1a0 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/dec2382247860d2134c8d41e103e26460c099629 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/8bb592c2eca8fd2bc06db7d80b38da18da4a2f43 (opens in a new tab)x_transferred
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.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-2024-38835 (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-2024-40948)Record last updated .