CVE-2025-37960: Linux kernel · memblock: Accept allocated memory before use in memblock_double_array()
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 5 Nov 2026, 22:02 UTC
Rated High by Threat Radar's AI analysis · No CVSS score from NVD or the CNA
Thin evidence
One scorer or noneExploitation evidence
Disclosed: evidence found.
CVE published 20 May 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.
What to do
AI-suggested
Apply the fix by ensuring accept_memory() is called on the allocated memory range before the slab allocator is available. For kernels prior to version 6.12, adjust the accept_memory() call parameters accordingly. Since this is a kernel-level issue, update to a kernel version that includes this fix once available.
Description
A vulnerability in the Linux kernel's memblock subsystem could cause a crash during booting of an SNP guest due to unaccepted allocated memory being used before acceptance in memblock_double_array(). This occurs when increasing the array size and the slab allocator is not yet available. The issue is mitigated by calling accept_memory() on the allocated memory range before the slab is available. The fix involves adjusting the accept_memory() call for kernels prior to version 6.12 due to parameter differences.
References
- git.kernel.org/stable/c/7bcd29181bab8d508d2adfdbb132de8b1e088698 (opens in a new tab)
- git.kernel.org/stable/c/d66a22f6a432a9dd376c9b365d7dc89bd416909c (opens in a new tab)
- git.kernel.org/stable/c/aa513e69e011a2b19fa22ce62ce35effbd5e0c81 (opens in a new tab)
- git.kernel.org/stable/c/da8bf5daa5e55a6af2b285ecda460d6454712ff4 (opens in a new tab)