NetSight
IP …
high7.8

CVE-2026-46331

In the Linux kernel, the following vulnerability has been resolved: net/sched: fix pedit partial COW leading to page cache corruption tcf_pedit_act() computes …

Impact

In the Linux kernel, the following vulnerability has been resolved: net/sched: fix pedit partial COW leading to page cache corruption tcf_pedit_act() computes the COW range for skb_ensure_writable() once before the key loop using tcfp_off_max_hint, but the hint does not account for the runtime header offset added by typed keys. This can leave part of the write region un-COW'd. Fix by moving skb_ensure_writable() inside the per-key loop where the actual write offset is known, and add overflow checking on the offset arithmetic. For negative offsets (e.g. Ethernet header edits at ingress), use skb_cow() to COW the headroom instead. Guard offset_valid() against INT_MIN, where negation is undefined.

Affected products

VendorProductAffected versions
LinuxLinux Kernel
from 4.19.244 before 4.20
from 5.4.195 before 5.5
from 5.10.117 before 5.11
from 5.15.41 before 5.16
from 5.17.9 before 5.18
from 5.18.1 before 6.12.94

Weakness classification

CWE-190CWE-787

References