UNKNOWN NVD
CVE-2026-98543
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_in
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.
References
- https://git.kernel.org/stable/c/35d442ed1f86465e49df3119fb898f985186db13
- https://git.kernel.org/stable/c/640d37fbd34d03af727dbc567f48c0203d1de6b4
- https://git.kernel.org/stable/c/7504b677c4370c9e4b153c553ff8831c093b1ff6
This unknown severity vulnerability was published on 2026-10-18 via NVD.
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