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

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

https://cvefeed.io/rssfeed/latest.atom / Wed, 08/12/2026 - 04:25
CVE ID :CVE-2026-68449
Published : Aug. 12, 2026, 12:51 a.m. | 36 minutes ago
Description :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.
Severity: 0.0 | NA
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