CVE-2026-89989

In the Linux kernel, the following vulnerability has been resolved: ima: Check for ERR_PTR from dentry_path() in validate_hash_algo() dentry_path() returns ERR_PTR(-ENAMETOOLONG) when the path exceeds the buffer. validate_hash_algo() passes the result straight to integrity_audit_msg() without checking. ERR_PTR is not NULL, so integrity_audit_message() sees a valid pointer and calls strlen() on it, which faults: BUG: unable to handle page fault for address: ffffffffffffffdc RIP: 0010:strlen+0x30/0xa0 Call Trace: audit_log_untrustedstring+0x19/0x30 integrity_audit_message+0x366/0x4f0 ima_inode_setxattr+0x512/0x5f0 Check for IS_ERR() and use NULL instead, which makes the audit message skip the name= field instead of crashing.

Status

Received - 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Published

2026-09-16

Last modified

2026-10-19

Affected products

• Linux Kernel (Linux)

References

• https://git.kernel.org/stable/c/d6fade89903c8fd0af6c956242aec8b927040e02
• https://git.kernel.org/stable/c/0de5b525c0cd7d202848b8adfde3c01c287fb1a6
• https://git.kernel.org/stable/c/30b5c0e17dcad72b6b2f987319aa645570e6376d
• https://git.kernel.org/stable/c/9e69d683ebd7def04557fe758ff123105d7d9840
• https://git.kernel.org/stable/c/f8a2f2a4602318eb93d49d27fd0d0fdaab17edde
• https://git.kernel.org/stable/c/d62a84a78de5f29c642fa3bd4eee072ba7289cb4
• https://git.kernel.org/stable/c/8861f6d5c0678a7c5089c7b272509fc5931b8437