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CVE-2026-89989 (GCVE-0-2026-89989)

Vulnerability from cvelistv5 – Published: 2026-09-16 10:33 – Updated: 2026-09-16 10:33
VLAI
Title
ima: Check for ERR_PTR from dentry_path() in validate_hash_algo()
Summary
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.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 4f2946aa0c45c78b4f4ef101bab9694e38c68db0 , < d6fade89903c8fd0af6c956242aec8b927040e02 (git)
Affected: 4f2946aa0c45c78b4f4ef101bab9694e38c68db0 , < 0de5b525c0cd7d202848b8adfde3c01c287fb1a6 (git)
Affected: 4f2946aa0c45c78b4f4ef101bab9694e38c68db0 , < 30b5c0e17dcad72b6b2f987319aa645570e6376d (git)
Affected: 4f2946aa0c45c78b4f4ef101bab9694e38c68db0 , < 9e69d683ebd7def04557fe758ff123105d7d9840 (git)
Affected: 4f2946aa0c45c78b4f4ef101bab9694e38c68db0 , < f8a2f2a4602318eb93d49d27fd0d0fdaab17edde (git)
Affected: 4f2946aa0c45c78b4f4ef101bab9694e38c68db0 , < d62a84a78de5f29c642fa3bd4eee072ba7289cb4 (git)
Affected: 4f2946aa0c45c78b4f4ef101bab9694e38c68db0 , < 8861f6d5c0678a7c5089c7b272509fc5931b8437 (git)
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Linux Linux Affected: 5.15
Unaffected: 0 , < 5.15 (semver)
Unaffected: 5.15.221 , ≤ 5.15.* (semver)
Unaffected: 6.1.188 , ≤ 6.1.* (semver)
Unaffected: 6.6.157 , ≤ 6.6.* (semver)
Unaffected: 6.12.110 , ≤ 6.12.* (semver)
Unaffected: 6.18.51 , ≤ 6.18.* (semver)
Unaffected: 7.2.5 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc2 , ≤ * (original_commit_for_fix)
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{
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          "product": "Linux",
          "programFiles": [
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          "value": "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-16T10:33:03.703Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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    "datePublished": "2026-09-16T10:33:03.703Z",
    "dateReserved": "2026-09-11T19:38:34.780Z",
    "dateUpdated": "2026-09-16T10:33:03.703Z",
    "state": "PUBLISHED"
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  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


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