CVE-2026-98244

In the Linux kernel, the following vulnerability has been resolved: btrfs: clear free space tree creation state on rebuild failure btrfs_rebuild_free_space_tree() sets BTRFS_FS_CREATING_FREE_SPACE_TREE before rebuilding the free space tree. Several error paths return without clearing this flag. The transaction restart failure path can leave the flag set on a live filesystem, causing delayed reference processing to be skipped. Clear it on all free space tree rebuild failure paths. Keep BTRFS_FS_FREE_SPACE_TREE_UNTRUSTED set, since a failed rebuild leaves the free space tree untrusted. Callers must fall back to extent-tree caching.

Package Linux Kernel
Published 2026-10-06
Last modified 2026-10-06
Patch available
Yes

Affected versions

Linux kernel versions 6.14 and later are affected. Fixed in 6.18.54, 7.2.8, 7.3-rc4 and their respective stable series.

Affected from
≥ 6.14
Fixed in
✓ 6.18.54 6.18.x ✓ 7.2.8 7.2.x ✓ 7.3-rc4

References

3 total

Frequently asked questions

  • What is CVE-2026-98244?

    CVE-2026-98244 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.14 onward and has been patched in 6.18.54, 7.2.8 and 7.3-rc4. CVE-2026-98244 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • Is there a patch available for CVE-2026-98244?

    Yes. CVE-2026-98244 has been patched. Fixed versions include 6.18.54, 7.2.8 and 7.3-rc4. If you are running Linux kernel 6.14 or later up to the fix versions, apply the relevant patch for your kernel branch.

  • Is CVE-2026-98244 actively exploited?

    No. CVE-2026-98244 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

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