CVE-2026-53146
HIGH 7.1In the Linux kernel, the following vulnerability has been resolved: thunderbolt: Limit XDomain response copy to actual frame size tb_xdomain_copy() copies req->response_size bytes from the received packet buffer regardless of the actual frame size. When a short response arrives, this reads past the valid frame data in the DMA pool buffer into stale contents from previous transactions. Use the minimum of frame size and expected response size for the copy length.
Severe if exploited (CVSS 7.1), but no known exploitation and low modeled probability. Patch on a normal cadence.
Exploitation likelihood
0.2%chance of exploitation in 30 days · 15th percentile
Impact if exploited
7.1CVSS 3.1 · HIGH
- ConfidentialityHigh
- IntegrityLow
- AvailabilityNone
What an attacker needs
- ⚠Access: Must sit on the same / adjacent network
- ✓Privileges: No account or privileges required
- ✓User interaction: No user interaction needed
- ✓Complexity: No special conditions — reliably repeatable
✓ lowers the bar for an attacker · ⚠ raises it
Weakness (CWE)
Not classified.
CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
References
Technical & other
- https://git.kernel.org/stable/c/c55da494dfb445fb28df3a9d293c2be6a299cd01
- https://git.kernel.org/stable/c/7720654b4842bcdfeb64bc002f6186041849e1e7
- https://git.kernel.org/stable/c/033dfa63bf6be2653441a1dccae4a8313a91bb9d
- https://git.kernel.org/stable/c/fc261397295b8ad0654cec747b0ec25ea0011995
- https://git.kernel.org/stable/c/a15b6d3136accb2bf84b04d9a3ddd991f7fbf1cb
- https://git.kernel.org/stable/c/b5daa920f44cb582272fc9bfaeb67408776cbaef
- https://git.kernel.org/stable/c/b2c1e5d9f1598cc1a4736d5c6bd1218f90805ee4
- https://git.kernel.org/stable/c/4db2bd2ed4785dbadaeeab9f4e346b21ac5fb8eb