CVE-2025-38364
maple_tree: fix MA_STATE_PREALLOC flag in mas_preallocate()
In the Linux kernel, the following vulnerability has been resolved: maple_tree: fix MA_STATE_PREALLOC flag in mas_preallocate() Temporarily clear the preallocation flag when explicitly requesting allocations. Pre-existing allocations are already counted against the request through mas_node_count_gfp(), but the allocations will not happen if the MA_STATE_PREALLOC flag is set. This flag is meant to avoid re-allocating in bulk allocation mode, and to detect issues with preallocation calculations. The MA_STATE_PREALLOC flag should also always be set on zero allocations so that detection of underflow allocations will print a WARN_ON() during consumption. User visible effect of this flaw is a WARN_ON() followed by a null pointer dereference when subsequent requests for larger number of nodes is ignored, such as the vma merge retry in mmap_region() caused by drivers altering the vma flags (which happens in v6.6, at least)
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| Linux Linux |
≥ 54a611b605901c7d5d05b6b8f5d04a6ceb0962aa; < d69cd64bd5af41c6fd409313504089970edaf02f (affected, git) ≥ 54a611b605901c7d5d05b6b8f5d04a6ceb0962aa; < e63032e66bca1d06e600033f3369ba3db3af0870 (affected, git) ≥ 54a611b605901c7d5d05b6b8f5d04a6ceb0962aa; < cf95f8426f889949b738f51ffcd72884411f3a6a (affected, git) ≥ 54a611b605901c7d5d05b6b8f5d04a6ceb0962aa; < 9e32f4700867abbd5d19abfcf698dbd0d2ce36a4 (affected, git) ≥ 54a611b605901c7d5d05b6b8f5d04a6ceb0962aa; < fba46a5d83ca8decb338722fb4899026d8d9ead2 (affected, git) Other versions: unaffected |
CNA: Linux |
| Linux Linux |
6.1 (affected) ≥ 0; < 6.1 (unaffected, semver) ≥ 6.1.146; ≤ 6.1.* (unaffected, semver) ≥ 6.6.99; ≤ 6.6.* (unaffected, semver) ≥ 6.12.36; ≤ 6.12.* (unaffected, semver) ≥ 6.15.5; ≤ 6.15.* (unaffected, semver) ≥ 6.16; ≤ * (unaffected, original_commit_for_fix) Other versions: affected |
CNA: Linux |
| SIMATIC S7-1500 CPU 1518-4 PN/DP MFP Siemens |
≥ V3.1.5; < * (affected, custom)
Other versions: unknown |
ADP: siemens-SADP |
| SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP Siemens |
≥ V3.1.5; < * (affected, custom)
Other versions: unknown |
ADP: siemens-SADP |
| SIPLUS S7-1500 CPU 1518-4 PN/DP MFP Siemens |
≥ V3.1.5; < * (affected, custom)
Other versions: unknown |
ADP: siemens-SADP |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
No CVSS assessment reported. An unscored record is not a low-severity determination.
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://git.kernel.org/stable/c/d69cd64bd5af41c6fd409313504089970edaf02fCNA: Linux
- https://git.kernel.org/stable/c/e63032e66bca1d06e600033f3369ba3db3af0870CNA: Linux
- https://git.kernel.org/stable/c/cf95f8426f889949b738f51ffcd72884411f3a6aCNA: Linux
- https://git.kernel.org/stable/c/9e32f4700867abbd5d19abfcf698dbd0d2ce36a4CNA: Linux
- https://git.kernel.org/stable/c/fba46a5d83ca8decb338722fb4899026d8d9ead2CNA: Linux
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.htmlADP: CVE
- https://cert-portal.siemens.com/productcert/html/ssa-082556.htmlADP: siemens-SADP
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