CVE-2026-43284

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: xfrm: esp: avoid in-place decrypt on shared skb frags MSG_SPLICE_PAGES can attach pages from a pipe directly to an skb. TCP marks such skbs with SKBFL_SHARED_FRAG after skb_splice_from_iter(), so later paths that may modify packet data can first make a private copy. The IPv4/IPv6 datagram append paths did not set this flag when splicing pages into UDP skbs. That leaves an ESP-in-UDP packet made from shared pipe pages looking like an ordinary uncloned nonlinear skb. ESP input then takes the no-COW fast path for uncloned skbs...

Affected product and versions

Product

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

Affected versions

>= cac2661c53f35cbe651bef9b07026a5a05ab8ce0 < a6cb440f274a22456ef3e86b457344f1678f38f9, >= cac2661c53f35cbe651bef9b07026a5a05ab8ce0 < ab8b995323e5237041472d07e5055f5f7dcdf15b, >= cac2661c53f35cbe651bef9b07026a5a05ab8ce0 < fe785bb3a8096dffcc4048a85cd0c83337eeecad, >= cac2661c53f35cbe651bef9b07026a5a05ab8ce0 < 5d55c7336f8032d434adcc5fab987ccc93a44aec, >= cac2661c53f35cbe651bef9b07026a5a05ab8ce0 < 8253aab4659ca16116b522203c2a6b18dccacea7, >= cac2661c53f35cbe651bef9b07026a5a05ab8ce0 < 50ed1e7873100f77abad20fd31c51029bc49cd03, >= cac2661c53f35cbe651bef9b07026a5a05ab8ce0 < b54edf1e9a3fd3491bdcb82a21f8d21315271e0d, >= cac2661c53f35cbe651bef9b07026a5a05ab8ce0 < 71a1d9d985d26716f74d21f18ee8cac821b06e97, >= cac2661c53f35cbe651bef9b07026a5a05ab8ce0 < 52646cbd00e765a6db9c3afe9535f26218276034, >= cac2661c53f35cbe651bef9b07026a5a05ab8ce0 < f4c50a4034e62ab75f1d5cdd191dd5f9c77fdff4, >= 4.11, >= V3.1.6, >= V3.1.5, >= 4.11 < 5.10.255, >= 5.12 < 5.15.205, >= 5.16 < 6.1.171, >= 6.2 < 6.6.138, >= 6.7 < 6.12.87, >= 6.13 < 6.18.28, >= 7.0 < 7.0.5

Fixed versions

5.10.255, 5.15.205, 6.1.171, 6.6.138, 6.12.87, 6.18.28, 7.0.5

Technical data

CVSS vector

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

CWE

CWE-123