CVE-2026-89989

ima: Check for ERR_PTR from dentry_path() in validate_hash_algo()

State: Published
Severity: Not scored
Published: Sep 16, 2026
Updated: Oct 19, 2026
Reserved: Sep 11, 2026

Description

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	4f2946aa0c45c78b4f4ef101bab9694e38c68db0 to before d6fade89903c8fd0af6c956242aec8b927040e02Affected 4f2946aa0c45c78b4f4ef101bab9694e38c68db0 to before 0de5b525c0cd7d202848b8adfde3c01c287fb1a6Affected 4f2946aa0c45c78b4f4ef101bab9694e38c68db0 to before 30b5c0e17dcad72b6b2f987319aa645570e6376dAffected 4f2946aa0c45c78b4f4ef101bab9694e38c68db0 to before 9e69d683ebd7def04557fe758ff123105d7d9840Affected 4f2946aa0c45c78b4f4ef101bab9694e38c68db0 to before f8a2f2a4602318eb93d49d27fd0d0fdaab17eddeAffected 4f2946aa0c45c78b4f4ef101bab9694e38c68db0 to before d62a84a78de5f29c642fa3bd4eee072ba7289cb4Affected 4f2946aa0c45c78b4f4ef101bab9694e38c68db0 to before 8861f6d5c0678a7c5089c7b272509fc5931b8437Affected
LinuxLinux	5.15Affected before 5.15Not affected 5.15.221 through 5.15.Not affected 6.1.188 through 6.1.Not affected 6.6.157 through 6.6.Not affected 6.12.110 through 6.12.Not affected 6.18.51 through 6.18.Not affected 7.2.5 through 7.2.Not affected 7.3 and laterNot affected

Product

Versions

LinuxLinux

4f2946aa0c45c78b4f4ef101bab9694e38c68db0 to before d6fade89903c8fd0af6c956242aec8b927040e02Affected
4f2946aa0c45c78b4f4ef101bab9694e38c68db0 to before 0de5b525c0cd7d202848b8adfde3c01c287fb1a6Affected
4f2946aa0c45c78b4f4ef101bab9694e38c68db0 to before 30b5c0e17dcad72b6b2f987319aa645570e6376dAffected
4f2946aa0c45c78b4f4ef101bab9694e38c68db0 to before 9e69d683ebd7def04557fe758ff123105d7d9840Affected
4f2946aa0c45c78b4f4ef101bab9694e38c68db0 to before f8a2f2a4602318eb93d49d27fd0d0fdaab17eddeAffected
4f2946aa0c45c78b4f4ef101bab9694e38c68db0 to before d62a84a78de5f29c642fa3bd4eee072ba7289cb4Affected
4f2946aa0c45c78b4f4ef101bab9694e38c68db0 to before 8861f6d5c0678a7c5089c7b272509fc5931b8437Affected

LinuxLinux

5.15Affected
before 5.15Not affected
5.15.221 through 5.15.*Not affected
6.1.188 through 6.1.*Not affected
6.6.157 through 6.6.*Not affected
6.12.110 through 6.12.*Not affected
6.18.51 through 6.18.*Not affected
7.2.5 through 7.2.*Not affected
7.3 and laterNot affected

References

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