CVE-2026-74545rtase: fix double free of multi-frag skb on DMA map failure
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Aug 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from d6e882b89fdf80be0ab4f914ec10f75215e49495 before 4f09172aff5f73a5e914f4fbc0d00a1c2ea9f7cb; from d6e882b89fdf80be0ab4f914ec10f75215e49495 before db986098f30881fafcc752800aa3b13fd289c922; from d6e882b89fdf80be0ab4f914ec10f75215e49495 before de691dc3227b061c4d0beba9f0128fe1ff33dd68; from d6e882b89fdf80be0ab4f914ec10f75215e49495 before 6fb7b769d6ed6d1d2e02af4a80e57a2477f35086 | CNA record |
References
- https://git.kernel.org/stable/c/4f09172aff5f73a5e914f4fbc0d00a1c2ea9f7cb
- https://git.kernel.org/stable/c/db986098f30881fafcc752800aa3b13fd289c922
- https://git.kernel.org/stable/c/de691dc3227b061c4d0beba9f0128fe1ff33dd68
- https://git.kernel.org/stable/c/6fb7b769d6ed6d1d2e02af4a80e57a2477f35086
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.