CVE-2026-46300

Vulnerability overview

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 frag...

Affected product and versions

Product

Linux Linux, NVIDIA for RHEL 10, Red Hat Enterprise Linux 10

Affected versions

>= cef401de7be8c4e155c6746bfccf721a4fa5fab9 < 3599e6b3cc1ada96883d496a50a210d3afbb6987, >= cef401de7be8c4e155c6746bfccf721a4fa5fab9 < 2f2b16022a2e10ca7bccfb98db5ed2ec0f72641c, >= cef401de7be8c4e155c6746bfccf721a4fa5fab9 < 9d3e5fd19fe1063bf607219e8562fbd567b8e8d5, >= cef401de7be8c4e155c6746bfccf721a4fa5fab9 < 78bf6b6bb19541d19fbda6242e7cfe2c682763c0, >= cef401de7be8c4e155c6746bfccf721a4fa5fab9 < 760e1addc27ba1a7beb4a0a7e8b3e9ec49e7a34e, >= cef401de7be8c4e155c6746bfccf721a4fa5fab9 < 3bd9e113d50034db99d7ef69fd8e5242d15e414a, >= cef401de7be8c4e155c6746bfccf721a4fa5fab9 < 3884358a9286b17f389a72b1426fc4547c23c111, >= cef401de7be8c4e155c6746bfccf721a4fa5fab9 < f84eca5817390257cef78013d0112481c503b4a3, >= 3.9, >= V3.1.6, >= V3.1.5, >= 3.9 <= 5.10.257, >= 5.11 < 5.15.208, >= 5.16 < 6.1.174, >= 6.2 < 6.6.141, >= 6.7 < 6.12.91, >= 6.13 < 6.18.33, >= 6.19 < 7.0.10, 7.1

Fixed versions

5.15.208, 6.1.174, 6.6.141, 6.12.91, 6.18.33, 7.0.10

Technical data

CVSS vector

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

CWE

CWE-123, CWE-787