GHSA-F29M-6GQ2-85CM
Vulnerability from github – Published: 2026-09-16 12:30 – Updated: 2026-09-16 12:30In 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.
{
"affected": [],
"aliases": [
"CVE-2026-89989"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-16T11:17:10Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nima: Check for ERR_PTR from dentry_path() in validate_hash_algo()\n\ndentry_path() returns ERR_PTR(-ENAMETOOLONG) when the path exceeds the\nbuffer. validate_hash_algo() passes the result straight to\nintegrity_audit_msg() without checking. ERR_PTR is not NULL, so\nintegrity_audit_message() sees a valid pointer and calls strlen() on\nit, which faults:\n\n BUG: unable to handle page fault for address: ffffffffffffffdc\n RIP: 0010:strlen+0x30/0xa0\n Call Trace:\n audit_log_untrustedstring+0x19/0x30\n integrity_audit_message+0x366/0x4f0\n ima_inode_setxattr+0x512/0x5f0\n\nCheck for IS_ERR() and use NULL instead, which makes the audit message\nskip the name= field instead of crashing.",
"id": "GHSA-f29m-6gq2-85cm",
"modified": "2026-09-16T12:30:44Z",
"published": "2026-09-16T12:30:44Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89989"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/0de5b525c0cd7d202848b8adfde3c01c287fb1a6"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/30b5c0e17dcad72b6b2f987319aa645570e6376d"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/8861f6d5c0678a7c5089c7b272509fc5931b8437"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/9e69d683ebd7def04557fe758ff123105d7d9840"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d62a84a78de5f29c642fa3bd4eee072ba7289cb4"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d6fade89903c8fd0af6c956242aec8b927040e02"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f8a2f2a4602318eb93d49d27fd0d0fdaab17edde"
}
],
"schema_version": "1.4.0",
"severity": []
}
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