CVE-2026-98543: Linux

Описание

Оригинално описание

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.

Засегнати продукти

• Linux Linux: 56467292794b800164df20c076c409ac548e56ec преди 7504b677c4370c9e4b153c553ff8831c093b1ff6; 56467292794b800164df20c076c409ac548e56ec преди 640d37fbd34d03af727dbc567f48c0203d1de6b4; 56467292794b800164df20c076c409ac548e56ec преди 35d442ed1f86465e49df3119fb898f985186db13
• Linux Linux: 6.15; преди 6.15; 6.18.55 до 6.18.*; 7.2.9 до 7.2.*; от 7.3 нататък

История

Други уязвимости в Linux Linux

• 8.1CVE-2026-99270
• 7.8CVE-2026-99269
• CVE-2026-99265
• CVE-2026-99261
• CVE-2026-99260

Първоизточници

• https://www.cve.org/CVERecord?id=CVE-2026-98543
• https://nvd.nist.gov/vuln/detail/CVE-2026-98543
• https://git.kernel.org/stable/c/7504b677c4370c9e4b153c553ff8831c093b1ff6
• https://git.kernel.org/stable/c/640d37fbd34d03af727dbc567f48c0203d1de6b4
• https://git.kernel.org/stable/c/35d442ed1f86465e49df3119fb898f985186db13