CVE-2026-80844
CVE CVE-2026-80844EUVD EUVD-2026-71294Published 2026-09-04T15:54:54.000Z
What the advisory describes
In the Linux kernel, the following vulnerability has been resolved: xfrm: ah6: validate routing header segments_left AH6 rearranges routing-header addresses before computing or verifying the ICV. ipv6_rearrange_rthdr() assumes that segments_left is not larger than the number of addresses described by the routing header's hdrlen field. That assumption does not hold for raw IPv6 HDRINCL packets. A packet with hdrlen equal to 2 describes one address, but can carry an arbitrary segments_left value. With segments_left equal to 255, the function moves its address pointer 4,064 bytes backwards and passes a 4,064-byte length to memmove(), resulting in an out-of-bounds access. Validate the invariant locally before modifying the routing header or performing any address-pointer arithmetic, and propagate malformed-header errors to the existing AH6 input and output error paths.
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: 5.10.269; patch: 6.1.187; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <48b0e36cf54358276ee7aa897034c973097d2bc9; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1516e31ac458a738be485620579d8f7fb2700fcb; patch: 7.1.13; patch: 7.3-rc1; patch: 6.6.156; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2dc650956e4e163b879b3fb1027f9557abc5c985; patch: 7.2.3; 2.6.12; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7bad4bda74dc4713f398d3b7624ff05478e3a568; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1b7e066eabcc7d6d8f476c34739b45932f2f4c31; patch: 5.15.220; patch: 6.12.108; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f00df8500e5a36ba70d336fd34bd2152ea074e5f; patch: 0; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6733ae71268a27d598cfb3f3339a3c950b9b656d; patch: 6.18.49; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <46640c814f25f096b0b0045ca50e1b7030cd8a30; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0bf11081ad3753938a2b48723ce6298dbac743a1
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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