CVE-2024-26630
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2024-26630
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-26630.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2024-26630
- Downstream
- Related
- Published
- 2024-03-13T15:50:32Z
- Modified
- 2025-10-15T08:14:38.092276Z
- Summary
- mm: cachestat: fix folio read-after-free in cache walk
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
mm: cachestat: fix folio read-after-free in cache walk
In cachestat, we access the folio from the page cache's xarray to compute its page offset, and check for its dirty and writeback flags. However, we do not hold a reference to the folio before performing these actions, which means the folio can concurrently be released and reused as another folio/page/slab.
Get around this altogether by just using xarray's existing machinery for the folio page offsets and dirty/writeback states.
This changes behavior for tmpfs files to now always report zeroes in their dirty and writeback counters. This is okay as tmpfs doesn't follow conventional writeback cache behavior: its pages get "cleaned" during swapout, after which they're no longer resident etc.
- References
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedcf264e1329fb0307e044f7675849f9f38b44c11aFixedba60fdf75e89ea762bb617be578dc47f27655117
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedcf264e1329fb0307e044f7675849f9f38b44c11aFixedfe7e008e0ce728252e4ec652cceebcc62211657c
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedcf264e1329fb0307e044f7675849f9f38b44c11aFixed3a75cb05d53f4a6823a32deb078de1366954a804
Affected versions
v6.*
v6.4
v6.4-rc5
v6.4-rc6
v6.4-rc7
v6.5
v6.5-rc1
v6.5-rc2
v6.5-rc3
v6.5-rc4
v6.5-rc5
v6.5-rc6
v6.5-rc7
v6.6
v6.6-rc1
v6.6-rc2
v6.6-rc3
v6.6-rc4
v6.6-rc5
v6.6-rc6
v6.6-rc7
v6.6.1
v6.6.10
v6.6.11
v6.6.12
v6.6.13
v6.6.14
v6.6.15
v6.6.16
v6.6.17
v6.6.18
v6.6.19
v6.6.2
v6.6.20
v6.6.3
v6.6.4
v6.6.5
v6.6.6
v6.6.7
v6.6.8
v6.6.9
v6.7
v6.7-rc1
v6.7-rc2
v6.7-rc3
v6.7-rc4
v6.7-rc5
v6.7-rc6
v6.7-rc7
v6.7-rc8
v6.7.1
v6.7.2
v6.7.3
v6.7.4
v6.7.5
v6.7.6
v6.7.7
v6.7.8
v6.8-rc1
v6.8-rc2
v6.8-rc3
v6.8-rc4
v6.8-rc5
Database specific
{
"vanir_signatures": [
{
"signature_version": "v1",
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@fe7e008e0ce728252e4ec652cceebcc62211657c",
"signature_type": "Function",
"target": {
"function": "filemap_cachestat",
"file": "mm/filemap.c"
},
"deprecated": false,
"digest": {
"length": 1208.0,
"function_hash": "147423665638425255982219034019202306609"
},
"id": "CVE-2024-26630-0bbf3665"
},
{
"signature_version": "v1",
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"target": {
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},
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"digest": {
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},
"id": "CVE-2024-26630-41577698"
},
{
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"target": {
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"id": "CVE-2024-26630-cf1ff29d"
}
]
}