CVE-2026-46300

high · 7.8

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.

7.8

CVSS

10.2%

EPSS (exploit prob.)

96th

EPSS percentile

2026-05-23

Published

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weaknesses

CWE-787CWE-456CWE-123

Affected products

Vendor	Product	Affected versions
linux	linux_kernel	>= 3.9, <= 5.10.257
linux	linux_kernel	>= 5.11, < 5.15.208
linux	linux_kernel	>= 5.16, < 6.1.174
linux	linux_kernel	>= 6.2, < 6.6.141
linux	linux_kernel	>= 6.7, < 6.12.91
linux	linux_kernel	>= 6.13, < 6.18.33
linux	linux_kernel	>= 6.19, < 7.0.10
linux	linux_kernel	7.1
linux	linux_kernel	7.1
linux	linux_kernel	7.1
linux	linux_kernel	7.1

Check a specific version with /api/v1/cve/match.

References

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-46300