CVE-2026-89562

CVE CVE-2026-89562EUVD EUVD-2026-76473Published 2026-09-11T19:44:33.000ZLast changed 2026-09-14T12:01:02.000ZCVSS 7.8

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: ip6_gre: fix hardware header length for NBMA tunnels ip6gre_tnl_link_config_route() accumulates the lower device's hardware header length into dev->hard_header_len whenever header_ops is set. This is incorrect for both users of header_ops. ip6gretap and ip6erspan have a fixed Ethernet hardware header length. For an NBMA ip6gre tunnel, ip6gre_header() creates only the GRE header, the optional FOU or GUE header, and the outer IPv6 header. The lower device header is headroom needed later, not part of the tunnel device's hardware header. Keep the lower device header in needed_headroom. Set hard_header_len to the tunnel header length only for ARPHRD_IP6GRE devices with header_ops, and leave the fixed Ethernet header length unchanged for tap and erspan devices.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux patch: 6.18.50; 5.4.82 <5.5; 832ba596494b2c9eac7760259eff2d8b7dcad0ee <565038b0092f65afe384961c0f548d605bf438b9; 4.19.162 <4.20; 5.9.13 <5.10; patch: 0; 832ba596494b2c9eac7760259eff2d8b7dcad0ee <7719f6e7ed2ffddc2c3bb61f4467b76d49e0af6a; 187a6daf5db45adc807c85bbe285319107bed198; patch: 6.12.109; 832ba596494b2c9eac7760259eff2d8b7dcad0ee <8bfe746afee38dd6e4348ddcd22d554789dbb9ff; 832ba596494b2c9eac7760259eff2d8b7dcad0ee <b8282668d8fa7c61b80e8e4890729031c291a16c; 832ba596494b2c9eac7760259eff2d8b7dcad0ee <c3457a5aae5fb43f7023d3f3dc472c2afa22acf0; 832ba596494b2c9eac7760259eff2d8b7dcad0ee <505b6d296c486ef7d1274f279d4c43a172f63224; 832ba596494b2c9eac7760259eff2d8b7dcad0ee <b1e95e3602d8e112458627f14c6c31c21f2188cb; patch: 6.1.188; 5.10; patch: 5.10.270; d9897bb66ce989325b4bf4cdbb6a799e4ac878b6; cf3d9717a5271573fa193c4dfa0df856295d5b15; patch: 5.15.221; patch: 7.2.4; 832ba596494b2c9eac7760259eff2d8b7dcad0ee <cb1afd087aedc90e5274537e4fb9bf3f98e5afdb; patch: 6.6.157; patch: 7.3-rc1

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.

Linux — Linux

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