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)
CVE-2025-38364
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2025-38364
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "54a611b605901c7d5d05b6b8f5d04a6ceb0962aa",
"lessThan": "d69cd64bd5af41c6fd409313504089970edaf02f",
"versionType": "git"
},
{
"status": "affected",
"version": "54a611b605901c7d5d05b6b8f5d04a6ceb0962aa",
"lessThan": "e63032e66bca1d06e600033f3369ba3db3af0870",
"versionType": "git"
},
{
"status": "affected",
"version": "54a611b605901c7d5d05b6b8f5d04a6ceb0962aa",
"lessThan": "cf95f8426f889949b738f51ffcd72884411f3a6a",
"versionType": "git"
},
{
"status": "affected",
"version": "54a611b605901c7d5d05b6b8f5d04a6ceb0962aa",
"lessThan": "9e32f4700867abbd5d19abfcf698dbd0d2ce36a4",
"versionType": "git"
},
{
"status": "affected",
"version": "54a611b605901c7d5d05b6b8f5d04a6ceb0962aa",
"lessThan": "fba46a5d83ca8decb338722fb4899026d8d9ead2",
"versionType": "git"
}
],
"programFiles": [
"lib/maple_tree.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.1"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.1",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.1.146",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.99",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.36",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.15.5",
"versionType": "semver",
"lessThanOrEqual": "6.15.*"
},
{
"status": "unaffected",
"version": "6.16",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"lib/maple_tree.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2025-38364
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #27035 · Revision 1
- Added to Heist Feed
- Publisher date