Use After Free The advisory has been revoked - it doesn't affect any version of package rtla (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-RHEL10-RTLA-18745093
- published13 Aug 2026
- disclosed12 Aug 2026
Introduced: 12 Aug 2026
CVE-2026-68442 (opens in a new tab)Amendment
The Red Hat security team deemed this advisory irrelevant for RHEL:10.
NVD Description
Note: Versions mentioned in the description apply only to the upstream rtla package and not the rtla package as distributed by RHEL.
In the Linux kernel, the following vulnerability has been resolved:
btrfs: don't propagate EXTENT_FLAG_LOGGING to split extent maps
When btrfs_drop_extent_map_range() splits an extent map, the new split maps inherit the original map's flags through a local 'flags' variable. Commit f86f7a75e2fb ("btrfs: use the flags of an extent map to identify the compression type") changed the EXTENT_FLAG_LOGGING clearing to operate on em->flags instead of that local 'flags' copy, so a split of an extent map that is currently being logged wrongly inherits EXTENT_FLAG_LOGGING.
The flag is then never cleared on the split, and when it is freed while still on the inode's modified_extents list (for example by the extent map shrinker) it trips the WARN_ON(!list_empty(&em->list)) in btrfs_free_extent_map() and leads to a use-after-free.
Clear EXTENT_FLAG_LOGGING from the local 'flags' copy used for the splits and only clear EXTENT_FLAG_PINNED from em->flags, restoring the behaviour prior to f86f7a75e2fb.
References
- https://bugzilla.redhat.com/show_bug.cgi?id=2514449
- https://access.redhat.com/security/cve/CVE-2026-68442
- https://git.kernel.org/stable/c/0e465c63f103a5ce6849614d6bda048d70eebec8
- https://git.kernel.org/stable/c/2a9246a424f45f33a1b8367052611ebe874868ad
- https://git.kernel.org/stable/c/5eff4d5b17fa1950e80bfd1ba43dc0699e61a644
- https://git.kernel.org/stable/c/9304713b70e7e1450e3a76e758836fe5391bfa95