CVE-2026-98543bpf: fs/xattr: don't assume the inode is locked in path_unlink/path_rmdir
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: bpf: fs/xattr: don't assume the inode is locked in path_unlink/path_rmdir bpf_lsm_has_d_inode_locked() makes the verifier rewrite bpf_[set|remove]_dentry_xattr() to the _locked variants, which assume that the caller already holds the inode's i_rwsem. The path_unlink and path_rmdir hooks are listed, but security_path_unlink() and security_path_rmdir() run before vfs_unlink()/vfs_rmdir() take the victim inode's i_rwsem, so a sleepable BPF LSM program attached to either hook mutates the victim's xattrs without the lock held. Drop the two path hooks from d_inode_locked_hooks so that the verifier keeps the locking bpf_[set|remove]_dentry_xattr() variants, which take the lock themselves.
- 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 18, 2026
- First seen by InfoSec Signals
- Oct 18, 2026
Affected products
Linux Linux linux:linux (from the name) | 56467292794b800164df20c076c409ac548e56ec builds before 7504b677c4370c9e4b153c553ff8831c093b1ff6; 56467292794b800164df20c076c409ac548e56ec builds before 640d37fbd34d03af727dbc567f48c0203d1de6b4; 56467292794b800164df20c076c409ac548e56ec builds before 35d442ed1f86465e49df3119fb898f985186db13 | CNA record |
References
- https://git.kernel.org/stable/c/7504b677c4370c9e4b153c553ff8831c093b1ff6
- https://git.kernel.org/stable/c/640d37fbd34d03af727dbc567f48c0203d1de6b4
- https://git.kernel.org/stable/c/35d442ed1f86465e49df3119fb898f985186db13
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.