Signal is active with 2 mentions in latest observed window
Recommended action window: Monitor and triage in normal cycle
NVD description
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.
Priority
LOW
Exploitation
NONE
PoC
NONE
Patch
NONE
Momentum
NONE
We have just added an important vulnerability affecting Linux Kernel (CVE-2026-68442) https://vuldb.com/vuln/388895
Post summary
The post announces the addition of CVE-2026-68442 to a vulnerability database, with no further technical, exploit, or remediation information provided.
CVE-2026-68442 Linux Kernel btrfs Use-After-Free Due to EXTENT_FLAG_LOGGING Propagation https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-68442
Post summary
The post announces CVE‑2026‑68442 as a Linux Kernel btrfs use‑after‑free issue and links to an external detail page, but provides no exploit or mitigation information.