CVE-2026-68300
CVE CVE-2026-68300EUVD EUVD-2026-55401Published 2026-08-10T12:02:34.000Z
What the advisory describes
In the Linux kernel, the following vulnerability has been resolved: sctp: auth: verify auth requirement when auth_chunk is NULL sctp_auth_chunk_verify() returns true unconditionally when chunk->auth_chunk is NULL, silently skipping authentication. This is incorrect when: 1. skb_clone() failed in the BH receive path, leaving auth_chunk NULL. In sctp_endpoint_bh_rcv() asoc is NULL for new connections, so the early sctp_auth_recv_cid() check cannot catch this. 2. No AUTH chunk precedes COOKIE-ECHO, so skb_clone() is never called and auth_chunk remains NULL. Fix by checking sctp_auth_recv_cid() when auth_chunk is NULL: if authentication is required, return false to drop the chunk; otherwise continue normally.
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: 7.1.6; bbd0d59809f923ea2b540cbd781b32110e249f6e <83f5031f2a6a49d696eb4cc0898345d12f9c6451; patch: 6.18.42; bbd0d59809f923ea2b540cbd781b32110e249f6e <ec2e157fc9678a9bc411305a25aec3fd337d7efb; bbd0d59809f923ea2b540cbd781b32110e249f6e <28c5fdce9dd955d2baf5e28987819b6d7cfaf646; 2.6.24; bbd0d59809f923ea2b540cbd781b32110e249f6e <8e04823c120b376ef7dab14b60ebf6823aa16c14; patch: 0; patch: 6.6.148; bbd0d59809f923ea2b540cbd781b32110e249f6e <18957373920caf5cdaf5cf32e5d1d7a99ca7700a; patch: 6.12.101; patch: 7.2-rc5
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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