btrfs: take commit root semaphore when iterating in mark_block_group_to_copy()
In the Linux kernel, the following vulnerability has been resolved: btrfs: take commit root semaphore when iterating in mark_block_group_to_copy() mark_block_group_to_copy() iterates over the commit root with skip_locking=true. A concurrent transaction commit can swap and free the commit root during iteration, causing use-after-free when accessing extent buffers. Fix it by using path->need_commit_sem to protect the commit root search.
CVE-2026-98245
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-2026-98245
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": "78ce9fc269af6e69c1399ab910ba6bc81c934f67",
"lessThan": "93a025166495c63ba5b8ac721c7040d5312e8335",
"versionType": "git"
},
{
"status": "affected",
"version": "78ce9fc269af6e69c1399ab910ba6bc81c934f67",
"lessThan": "8e2007b263ea250251ec3021a0a197da990ee1a8",
"versionType": "git"
},
{
"status": "affected",
"version": "78ce9fc269af6e69c1399ab910ba6bc81c934f67",
"lessThan": "709f6a5e986535005110c6c69b322f63631cb200",
"versionType": "git"
},
{
"status": "affected",
"version": "78ce9fc269af6e69c1399ab910ba6bc81c934f67",
"lessThan": "c32490c6d3f3a9f2d177d57c7eb8bbc347561d08",
"versionType": "git"
},
{
"status": "affected",
"version": "78ce9fc269af6e69c1399ab910ba6bc81c934f67",
"lessThan": "0594e3423f4ba3137c734371169491f9a98e9af4",
"versionType": "git"
}
],
"programFiles": [
"fs/btrfs/dev-replace.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.12"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.12",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.112",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.54",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.8",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/btrfs/dev-replace.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98245
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #48872 · Revision 1
- Added to Heist Feed
- Publisher date