CVE-2026-89989

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.

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References

Other References

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

Frequently Asked Questions

What is 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.

How do I check if I'm vulnerable to CVE-2026-89989? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

CVE-2026-89989

Description

References

Other References

Frequently Asked Questions

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