CVE-2025-38071x86/mm: Check return value from memblock_phys_alloc_range()
- 5.5MediumCVSS base score
- 0.19%Exploitation in 30 daysEPSS · top 91% 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: Check return value from memblock_phys_alloc_range() At least with CONFIG_PHYSICAL_START=0x100000, if there is < 4 MiB of contiguous free memory available at this point, the kernel will crash and burn because memblock_phys_alloc_range() returns 0 on failure, which leads memblock_phys_free() to throw the first 4 MiB of physical memory to the wolves. At a minimum it should fail gracefully with a meaningful diagnostic, but in fact everything seems to work fine without the weird reserve allocation.
Timeline
ID reserved
By Linux
- 2 months later
· 2 months later
Published
- 17 months later
· 17 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)
- 0.19% · top 91% of all CVEs (13 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 a7259df7670240ee03b0cfce8a3e5d3773911e24 – < 8c18c904d301ffeb33b071eadc55cd6131e1e9be
- affected a7259df7670240ee03b0cfce8a3e5d3773911e24 – < bffd5f2815c5234d609725cd0dc2f4bc5de2fc67
- affected a7259df7670240ee03b0cfce8a3e5d3773911e24 – < c6f2694c580c27dca0cf7546ee9b4bfa6b940e38
- affected a7259df7670240ee03b0cfce8a3e5d3773911e24 – < dde4800d2b0f68b945fd81d4fc2d4a10ae25f743
- affected a7259df7670240ee03b0cfce8a3e5d3773911e24 – < 631ca8909fd5c62b9fda9edda93924311a78a9c4
- affected 5.15
- unaffected < 5.15
- unaffected 6.1.141 – ≤ 6.1.*
- unaffected 6.6.93 – ≤ 6.6.*
- unaffected 6.12.31 – ≤ 6.12.*
- unaffected 6.14.9 – ≤ 6.14.*
- unaffected 6.15 – ≤ *
References
References7
- https://git.kernel.org/stable/c/8c18c904d301ffeb33b071eadc55cd6131e1e9be (opens in a new tab)
- https://git.kernel.org/stable/c/bffd5f2815c5234d609725cd0dc2f4bc5de2fc67 (opens in a new tab)
- https://git.kernel.org/stable/c/c6f2694c580c27dca0cf7546ee9b4bfa6b940e38 (opens in a new tab)
- https://git.kernel.org/stable/c/dde4800d2b0f68b945fd81d4fc2d4a10ae25f743 (opens in a new tab)
- https://git.kernel.org/stable/c/631ca8909fd5c62b9fda9edda93924311a78a9c4 (opens in a new tab)
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-082556.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-2025-18582 (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-2025-38071)Record last updated .