CVE-2026-68449None▾ SunlitIn the Linux kernel, the following vulnerability has been resolved: ata: sata_dwc_460ex: fix infinite loop in NCQ tag completion bit-scanning The hand-rolled bit-scanning loop in the NCQ completion path has an infinite loop bug. When …
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Nov 5.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.2%
In the Linux kernel, the following vulnerability has been resolved:
ata: sata_dwc_460ex: fix infinite loop in NCQ tag completion bit-scanning
The hand-rolled bit-scanning loop in the NCQ completion path has an infinite loop bug. When tag_mask has only high bits set (e.g. 0x80000000), the inner while loop left-shifts tag_mask until it overflows to 0. At that point !(0 & 1) is always true and 0 <<= 1 stays 0, causing an infinite loop in hardirq context with a spinlock held.
Replace the open-coded bit-scanning with __ffs() which correctly finds the least significant set bit and is bounded by the width of the argument.
Linux >= 62936009f35a6659cc3ebe0d90c754182d60da73 < ea9fa4dabe476f85fe73df30a6ab61a23c22fda4Linux >= 62936009f35a6659cc3ebe0d90c754182d60da73 < d72e8089dc332ac48293512ef0de77cbe0e04d25Linux >= 62936009f35a6659cc3ebe0d90c754182d60da73 < 90e8cf489b593814b9398aa187ddbb790e33ec6fLinux >= 62936009f35a6659cc3ebe0d90c754182d60da73 < 4c6e64cae2b2dab32ad9099faa339f6a72c0ce16Linux >= 62936009f35a6659cc3ebe0d90c754182d60da73 < 8c5de0d8ab6824cfdadcbbe1be4c6c9d9f4c1f80Linux >= 62936009f35a6659cc3ebe0d90c754182d60da73 < 1842d45f461a78988254631893329bdf4596e954Linux >= 62936009f35a6659cc3ebe0d90c754182d60da73 < 29b916d3556bd12a95be7c56ca391b8cd572f8beLinux >= 62936009f35a6659cc3ebe0d90c754182d60da73 < c2130f6553f4a5cbdc259de069600117a995f197Linux 2.6.36Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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