CVE-2026-74545
Description
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.
How to fix
- Linux Linux4f09172aff5f73a5e914f4fbc0d00a1c2ea9f7cb, db986098f30881fafcc752800aa3b13fd289c922, de691dc3227b061c4d0beba9f0128fe1ff33dd68, 6fb7b769d6ed6d1d2e02af4a80e57a2477f35086 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | d6e882b89fdf80be0ab4f914ec10f75215e49495 ≤ v < 4f09172aff5f73a5e914f4fbc0d00a1c2ea9f7cb, d6e882b89fdf80be0ab4f914ec10f75215e49495 ≤ v < db986098f30881fafcc752800aa3b13fd289c922, d6e882b89fdf80be0ab4f914ec10f75215e49495 ≤ v < de691dc3227b061c4d0beba9f0128fe1ff33dd68, d6e882b89fdf80be0ab4f914ec10f75215e49495 ≤ v < 6fb7b769d6ed6d1d2e02af4a80e57a2477f35086, 6.12 | 4f09172aff5f73a5e914f4fbc0d00a1c2ea9f7cb, db986098f30881fafcc752800aa3b13fd289c922, de691dc3227b061c4d0beba9f0128fe1ff33dd68, 6fb7b769d6ed6d1d2e02af4a80e57a2477f35086 |
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