CVE-2026-43163 (GCVE-0-2026-43163)
Vulnerability from cvelistv5
Published
2026-05-06 11:27
Modified
2026-05-11 22:18
Severity ?
VLAI Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
md/bitmap: fix GPF in write_page caused by resize race
A General Protection Fault occurs in write_page() during array resize:
RIP: 0010:write_page+0x22b/0x3c0 [md_mod]
This is a use-after-free race between bitmap_daemon_work() and
__bitmap_resize(). The daemon iterates over `bitmap->storage.filemap`
without locking, while the resize path frees that storage via
md_bitmap_file_unmap(). `quiesce()` does not stop the md thread,
allowing concurrent access to freed pages.
Fix by holding `mddev->bitmap_info.mutex` during the bitmap update.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Version: d60b479d177a5735b6b4db6ee5280ef6653f50e7 Version: d60b479d177a5735b6b4db6ee5280ef6653f50e7 Version: d60b479d177a5735b6b4db6ee5280ef6653f50e7 Version: d60b479d177a5735b6b4db6ee5280ef6653f50e7 Version: d60b479d177a5735b6b4db6ee5280ef6653f50e7 Version: d60b479d177a5735b6b4db6ee5280ef6653f50e7 Version: d60b479d177a5735b6b4db6ee5280ef6653f50e7 Version: d60b479d177a5735b6b4db6ee5280ef6653f50e7 |
||
{
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"status": "unaffected",
"version": "5.10.252",
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{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.202",
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},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.165",
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{
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{
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"version": "6.12.75",
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{
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"version": "6.18.16",
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}
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"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmd/bitmap: fix GPF in write_page caused by resize race\n\nA General Protection Fault occurs in write_page() during array resize:\nRIP: 0010:write_page+0x22b/0x3c0 [md_mod]\n\nThis is a use-after-free race between bitmap_daemon_work() and\n__bitmap_resize(). The daemon iterates over `bitmap-\u003estorage.filemap`\nwithout locking, while the resize path frees that storage via\nmd_bitmap_file_unmap(). `quiesce()` does not stop the md thread,\nallowing concurrent access to freed pages.\n\nFix by holding `mddev-\u003ebitmap_info.mutex` during the bitmap update."
}
],
"providerMetadata": {
"dateUpdated": "2026-05-11T22:18:58.873Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
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"references": [
{
"url": "https://git.kernel.org/stable/c/140cc839fbeb1ddb33a8da8811b716d88d3905b7"
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{
"url": "https://git.kernel.org/stable/c/ebcacc7ca22d5e8a03a970f0621ae1d1356b9ae8"
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{
"url": "https://git.kernel.org/stable/c/d3af62411e19752c663fe4f424dbf49d95a4cc7c"
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{
"url": "https://git.kernel.org/stable/c/d92b8fac294b5f915c50e65ce4ae2262e53614ec"
},
{
"url": "https://git.kernel.org/stable/c/a437e3bf30e32846079e470c1ba5ee790bccdf89"
},
{
"url": "https://git.kernel.org/stable/c/9a6f8cd28bb9bb6ed86a6df19331fb08016dee7f"
},
{
"url": "https://git.kernel.org/stable/c/5f73c8b33df9a605a591eab72d43a969600c1f8c"
},
{
"url": "https://git.kernel.org/stable/c/46ef85f854dfa9d5226b3c1c46493d79556c9589"
}
],
"title": "md/bitmap: fix GPF in write_page caused by resize race",
"x_generator": {
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"cveMetadata": {
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"assignerShortName": "Linux",
"cveId": "CVE-2026-43163",
"datePublished": "2026-05-06T11:27:41.265Z",
"dateReserved": "2026-05-01T14:12:55.990Z",
"dateUpdated": "2026-05-11T22:18:58.873Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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