CVE-2026-53147
In the Linux kernel, the following vulnerability has been resolved: thunderbolt: Validate XDomain request packet size before type cast tb_xdp_handle_request() casts the received packet buffer to protocol-specific structs without verifying that the…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.27%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
In the Linux kernel, the following vulnerability has been resolved: thunderbolt: Validate XDomain request packet size before type cast tb_xdp_handle_request() casts the received packet buffer to protocol-specific structs without verifying that the allocation is large enough for the target type. A peer can send a minimal XDomain packet that passes the generic header length check but is shorter than the struct accessed after the cast, causing out-of- bounds reads from the kmemdup allocation. Plumb the packet length through xdomain_request_work and validate it against the expected struct size before each cast.
- CVSS 3.1
- 8.1 HIGHCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
- EPSS
- 0.27% probability · 19th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-125
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/07cd2787cdf8942d24a1a3ef81aa89b526fb6381Patch
- https://git.kernel.org/stable/c/0dd61ba03d05187726ecdf9c0e2175a81b9b24f6Patch
- https://git.kernel.org/stable/c/46da5c3ea011e884028a91cf913db093920a915bPatch
- https://git.kernel.org/stable/c/79235c8add5da4bf27a12f5a5dbb579f300c059ePatch
- https://git.kernel.org/stable/c/a504b9f2797b739e0304d537e8aa4ce883ecce39Patch
- https://git.kernel.org/stable/c/a770e62923090d7572f1f5a8507ae551d354a057Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.