CVE-2026-74545

Summary

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

rtase: fix double free of multi-frag skb on DMA map failure

In rtase_start_xmit(), when the head buffer DMA mapping fails after rtase_xmit_frags() has mapped all fragments, the error path clears the fragment descriptors with rtase_tx_clear_range(), which frees the skb through the last-frag slot and accounts tx_dropped. Control then falls through to the common error label, which frees the same skb a second time and counts it again.

Return right after clearing the fragments when the skb owns frags; the no-frag case still drops through and frees the head skb once.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxd6e882b89fdf80be0ab4f914ec10f75215e49495 < 4f09172aff5f73a5e914f4fbc0d00a1c2ea9f7cbaffected
LinuxLinuxd6e882b89fdf80be0ab4f914ec10f75215e49495 < db986098f30881fafcc752800aa3b13fd289c922affected
LinuxLinuxd6e882b89fdf80be0ab4f914ec10f75215e49495 < de691dc3227b061c4d0beba9f0128fe1ff33dd68affected
LinuxLinuxd6e882b89fdf80be0ab4f914ec10f75215e49495 < 6fb7b769d6ed6d1d2e02af4a80e57a2477f35086affected
LinuxLinux6.12affected
LinuxLinux0 < 6.12unaffected
LinuxLinux6.12.103 <= 6.12.*unaffected
LinuxLinux6.18.44 <= 6.18.*unaffected
LinuxLinux7.1.8 <= 7.1.*unaffected
LinuxLinux7.2-rc6 <= *unaffected

Weaknesses

References