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VulnerabilityPublished Updated

CVE-2026-68449: Linux kernel · ata: sata_dwc_460ex: fix infinite loop in NCQ tag completion bit-scanning

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in ea9fa4dabe476f85fe73df30a6ab61a23c22fda4 : patch Linux kernel soon.

Data as of 30 Oct 2026, 13:33 UTC

Severity
High

Rated High by Threat Radar's AI analysis · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none
Patch
Available – fixed in ea9fa4dabe476f85fe73df30a6ab61a23c22fda4, d72e8089dc332ac48293512ef0de77cbe0e04d25, c2130f6553f4a5cbdc259de069600117a995f197 +5

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 12 Aug 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • ≥ 62936009f35a6659cc3ebe0d90c754182d60da73, < ea9fa4dabe476f85fe73df30a6ab61a23c22fda4
Fixed in
  • ea9fa4dabe476f85fe73df30a6ab61a23c22fda4
LinuxLinuxAffected
  • ≥ 62936009f35a6659cc3ebe0d90c754182d60da73, < d72e8089dc332ac48293512ef0de77cbe0e04d25
Fixed in
  • d72e8089dc332ac48293512ef0de77cbe0e04d25
LinuxLinuxAffected
  • ≥ 62936009f35a6659cc3ebe0d90c754182d60da73, < c2130f6553f4a5cbdc259de069600117a995f197
Fixed in
  • c2130f6553f4a5cbdc259de069600117a995f197
LinuxLinuxAffected
  • ≥ 62936009f35a6659cc3ebe0d90c754182d60da73, < 1842d45f461a78988254631893329bdf4596e954
Fixed in
  • 1842d45f461a78988254631893329bdf4596e954
LinuxLinuxAffected
  • ≥ 62936009f35a6659cc3ebe0d90c754182d60da73, < 90e8cf489b593814b9398aa187ddbb790e33ec6f
Fixed in
  • 90e8cf489b593814b9398aa187ddbb790e33ec6f
LinuxLinuxAffected
  • ≥ 62936009f35a6659cc3ebe0d90c754182d60da73, < 29b916d3556bd12a95be7c56ca391b8cd572f8be
Fixed in
  • 29b916d3556bd12a95be7c56ca391b8cd572f8be

AI-suggested

This vulnerability has been fixed in the Linux kernel. Users should update to a kernel version that includes the fix identified by the commits listed in establishedFacts.fixedVersions. No additional mitigation is required once the system is updated.

Description

A vulnerability in the Linux kernel's sata_dwc_460ex driver caused an infinite loop in the NCQ tag completion bit-scanning code. The issue occurs when the tag_mask has only high bits set, leading to an unbounded left shift that results in a spinlock-held infinite loop in hardirq context. This was fixed by replacing the custom bit-scanning loop with the __ffs() function, which correctly finds the least significant set bit and prevents the infinite loop.

References

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