Not yet scoredPublished Oct 6, 2026

CVE-2026-98245btrfs: take commit root semaphore when iterating in mark_block_group_to_copy()

Updated under an hour ago (Oct 26, 2026, 9:50 PM ET)

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Exploited in the last 30 days

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.

CVSS: Not yet scored
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Received
Record last updated: Oct 21, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 78ce9fc269af6e69c1399ab910ba6bc81c934f67 before 93a025166495c63ba5b8ac721c7040d5312e8335; 78ce9fc269af6e69c1399ab910ba6bc81c934f67 builds before 8e2007b263ea250251ec3021a0a197da990ee1a8; from 78ce9fc269af6e69c1399ab910ba6bc81c934f67 before 709f6a5e986535005110c6c69b322f63631cb200; from 78ce9fc269af6e69c1399ab910ba6bc81c934f67 before c32490c6d3f3a9f2d177d57c7eb8bbc347561d08; from 78ce9fc269af6e69c1399ab910ba6bc81c934f67 before 0594e3423f4ba3137c734371169491f9a98e9af4	CNA record

References

References

https://git.kernel.org/stable/c/93a025166495c63ba5b8ac721c7040d5312e8335
https://git.kernel.org/stable/c/8e2007b263ea250251ec3021a0a197da990ee1a8
https://git.kernel.org/stable/c/709f6a5e986535005110c6c69b322f63631cb200
https://git.kernel.org/stable/c/c32490c6d3f3a9f2d177d57c7eb8bbc347561d08
https://git.kernel.org/stable/c/0594e3423f4ba3137c734371169491f9a98e9af4

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.