PoC Index85,079 CVEs with PoCs

CVE-2026-46300

net: skbuff: preserve shared-frag marker during coalescing

HIGH 7.8EPSS 2.4%

In the Linux kernel, the following vulnerability has been resolved: net: skbuff: preserve shared-frag marker during coalescing skb_try_coalesce() can attach paged frags from @from to @to. If @from has SKBFL_SHARED_FRAG set, the resulting @to skb can contain the same externally-owned or page-cache-backed frags, but the shared-frag marker is currently lost. That breaks the invariant relied on by later in-place writers. In particular, ESP input checks skb_has_shared_frag() before deciding whether an uncloned nonlinear skb can skip skb_cow_data(). If TCP receive coalescing has moved shared frags into an unmarked skb, ESP can see skb_has_shared_frag() as false and decrypt in place over page-cache backed frags. Propagate SKBFL_SHARED_FRAG when skb_try_coalesce() transfers paged frags. The tailroom copy path does not need the marker because it copies bytes into @to's linear data rather than transferring frag descriptors.

Affected
Linux
CVSS v3.1 NVD
7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS
2.43% chance of exploitation in the next 30 days, 84th percentile
Published
2026-05-23
Updated
2026-10-16

Proof-of-concept exploits (12)

Metasploit modules (1)

ExploitDB entries (1)

Security advisories

References

Related