CVE-2024-36929: net: core: reject skb_copy(_expand) for fraglist GSO skbs

Description

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

net: core: reject skb_copy(_expand) for fraglist GSO skbs

SKB_GSO_FRAGLIST skbs must not be linearized, otherwise they become
invalid. Return NULL if such an skb is passed to skb_copy or
skb_copy_expand, in order to prevent a crash on a potential later
call to skb_gso_segment.

Classification

CVE ID: CVE-2024-36929

Affected Products

Vendor: Linux

Product: Linux

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.04% (probability of being exploited)

EPSS Percentile: 12.41% (scored less or equal to compared to others)

EPSS Date: 2025-02-04 (when was this score calculated)

References

https://git.kernel.org/stable/c/faa83a7797f06cefed86731ba4baa3b4dfdc06c1
https://git.kernel.org/stable/c/c7af99cc21923a9650533c9d77265c8dd683a533
https://git.kernel.org/stable/c/989bf6fd1e1d058e73a364dce1a0c53d33373f62
https://git.kernel.org/stable/c/cfe34d86ef9765c388f145039006bb79b6c81ac6
https://git.kernel.org/stable/c/aea5e2669c2863fdd8679c40ee310b3bcaa85aec
https://git.kernel.org/stable/c/d091e579b864fa790dd6a0cd537a22c383126681

Timeline