CVE-2026-74495

Summary

In the Linux kernel, the following vulnerability has been resolved:

igbvf: Fix leak in TX DMA error cleanup

If an error is encountered while mapping TX buffers, the driver should unmap any buffers already mapped for that skb.

Because count is incremented before each frag mapping, it will always match the correct number of unmappings needed when dma_error is reached. Decrementing count before the while loop in dma_error causes an off-by-one error. If any mapping was successful before an unsuccessful mapping, exactly one DMA mapping (the head) would leak.

This bug was introduced by a 2010 fix for an endless loop in dma_error. All other affected drivers have already been fixed.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxc1fa347f20f17f14a4a1575727fa24340e8a9117 < 31089f4eab42e0fc248ec80c26f9b0bad59ba4ccaffected
LinuxLinuxc1fa347f20f17f14a4a1575727fa24340e8a9117 < bc25d56c03e41c10bc4b40e99ca5d7b941675c04affected
LinuxLinuxc1fa347f20f17f14a4a1575727fa24340e8a9117 < 845a9cdd9b03b7b6fa8de3ee80579780350a7f65affected
LinuxLinuxc1fa347f20f17f14a4a1575727fa24340e8a9117 < df07003b5a6c6c9fce60d765d6a3da815a74c41caffected
LinuxLinuxc1fa347f20f17f14a4a1575727fa24340e8a9117 < 0565052b7e2f436b7f1541f4849da96dc0aa7a0eaffected
LinuxLinux2.6.33affected
LinuxLinux0 < 2.6.33unaffected
LinuxLinux6.6.151 <= 6.6.*unaffected
LinuxLinux6.12.103 <= 6.12.*unaffected
LinuxLinux6.18.44 <= 6.18.*unaffected
LinuxLinux7.1.8 <= 7.1.*unaffected
LinuxLinux7.2 <= *unaffected

Weaknesses

References