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CVE-2026-98245

Unknown

Last modified

CVE-2026-98245 is a vulnerability of currently unknown severity. 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..

Description

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.

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 78ce9fc269af6e69c1399ab910ba6bc81c934f67, < 8e2007b263ea250251ec3021a0a197da990ee1a8; >= 78ce9fc269af6e69c1399ab910ba6bc81c934f67, < 709f6a5e986535005110c6c69b322f63631cb200; >= 78ce9fc269af6e69c1399ab910ba6bc81c934f67, < c32490c6d3f3a9f2d177d57c7eb8bbc347561d08; >= 78ce9fc269af6e69c1399ab910ba6bc81c934f67, < 0594e3423f4ba3137c734371169491f9a98e9af4
LinuxLinux5.12

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-98245?
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.
How severe is CVE-2026-98245?
Severity scoring for CVE-2026-98245 is pending analysis.
How do I fix CVE-2026-98245?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST