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CVE-2026-89447 (GCVE-0-2026-89447)

Vulnerability from cvelistv5 – Published: 2026-09-11 19:43 – Updated: 2026-09-11 19:43
VLAI
Title
iommufd: Avoid locking internal accesses during unmap
Summary
In the Linux kernel, the following vulnerability has been resolved: iommufd: Avoid locking internal accesses during unmap iommufd_access_notify_unmap() skips internal accesses because they do not have an external unmap callback to invoke. However, the current test calls iommufd_lock_obj() before checking whether the access is internal. If iommufd_lock_obj() succeeds, the loop then sees the internal access and continues, bypassing the matching iommufd_put_object() used by the normal unmap path. This leaks the object reference taken by iommufd_lock_obj(). Check for internal accesses first so skipped entries are never locked.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 27b77ea5feaa8fcf385ea99ce757982b0ac9d1f0 , < 436189ee4bb2c7c993b945d68570dd38c3e4349e (git)
Affected: 27b77ea5feaa8fcf385ea99ce757982b0ac9d1f0 , < 50a66a63d1c841ae6b28a4551f642c1bba4c9529 (git)
Affected: 27b77ea5feaa8fcf385ea99ce757982b0ac9d1f0 , < 0dbcdf4473a614adbd732d567c9b39ac0e040e0c (git)
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Linux Linux Affected: 6.17
Unaffected: 0 , < 6.17 (semver)
Unaffected: 6.18.50 , ≤ 6.18.* (semver)
Unaffected: 7.2.4 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)
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      "status": "interim",
      "title": "SUSE CVE CVE-2026-89447",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-89447.json",
      "version": "2"
    }
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}



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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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