CVE-2026-74744
CVE CVE-2026-74744EUVD EUVD-2026-66574Published 2026-08-26T14:36:54.000ZLast changed 2026-08-27T05:01:05.000ZCVSS 9.8
What the advisory describes
In the Linux kernel, the following vulnerability has been resolved: ipvlan: inherit needed_headroom and needed_tailroom from phy_dev ipvlan devices inherit hard_header_len from phy_dev during ipvlan_init(), but leave needed_headroom and needed_tailroom set to 0. When the underlying phy_dev (or stacked lower device) requires extra headroom or tailroom for headers/trailers (e.g. macsec, ipsec, wireguard, tunnels, or veth with rx headroom), upper layers calculating packet headroom and tailroom fail to reserve sufficient space. This can result in reallocation overhead, skb headroom underflows, or KASAN slab-use-after-free crashes when dev_hard_header() / ipvlan_hard_header() prepends header data or when lower devices append tailroom. Fix this by: 1. Inheriting needed_headroom and needed_tailroom from phy_dev in ipvlan_init(). 2. Propagating needed_headroom and needed_tailroom updates to attached ipvlans in ipvlan_device_event() when receiving NETDEV_FEAT_CHANGE events.
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: 6.1.184; patch: 0; patch: 7.2; 2ad7bf3638411cb547f2823df08166c13ab04269 <5c2ca77212eb38559b0353b8363b7a84f4b019dd; 3.19; patch: 6.6.153; patch: 6.18.46; patch: 6.12.105; 2ad7bf3638411cb547f2823df08166c13ab04269 <5f33188457bbcc1b11ca87084037963c516ed3d9; 2ad7bf3638411cb547f2823df08166c13ab04269 <f3c17ff65f54781cde696e16a6c577615ed735aa; patch: 7.1.10; 2ad7bf3638411cb547f2823df08166c13ab04269 <e16e960d55a40d36bd7c2494cc005e757dc9a1ef; 2ad7bf3638411cb547f2823df08166c13ab04269 <c0fbe31f6b20ade0465130685859faa5c86fda59; 2ad7bf3638411cb547f2823df08166c13ab04269 <af602c4d0ee548da18e2409b4b4da1079625a372
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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