Answer in brief
CVE-2026-68300 records a Critical severity (CVSS 9.8) vulnerability in sctp: auth: verify auth requirement when auth_chunk is NULL. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 9.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=bbd0d59809f923ea2b540cbd781b32110e249f6e <ec2e157fc9678a9bc411305a25aec3fd337d7efb || >=bbd0d59809f923ea2b540cbd781b32110e249f6e <28c5fdce9dd955d2baf5e28987819b6d7cfaf646 || >=bbd0d59809f923ea2b540cbd781b32110e249f6e <18957373920caf5cdaf5cf32e5d1d7a99ca7700a || >=bbd0d59809f923ea2b540cbd781b32110e249f6e <83f5031f2a6a49d696eb4cc0898345d12f9c6451 || >=bbd0d59809f923ea2b540cbd781b32110e249f6e <8e04823c120b376ef7dab14b60ebf6823aa16c14 | ec2e157fc9678a9bc411305a25aec3fd337d7efb, 28c5fdce9dd955d2baf5e28987819b6d7cfaf646, 18957373920caf5cdaf5cf32e5d1d7a99ca7700a, 83f5031f2a6a49d696eb4cc0898345d12f9c6451, 8e04823c120b376ef7dab14b60ebf6823aa16c14 |
| Linux/Linuxgeneric | 2.6.24 | Not reported |
| Linux/Linuxgeneric | >=bbd0d59809f923ea2b540cbd781b32110e249f6e <a129792b3aef15002746c13522781d92ed3522c3 || >=bbd0d59809f923ea2b540cbd781b32110e249f6e <5a022ac51ad83b4ce6c898f4b9eefc65bd26b247 || >=bbd0d59809f923ea2b540cbd781b32110e249f6e <6caf0e8590c0bf05a76b0d387726adf3a6f3725c || >=bbd0d59809f923ea2b540cbd781b32110e249f6e <ec2e157fc9678a9bc411305a25aec3fd337d7efb || >=bbd0d59809f923ea2b540cbd781b32110e249f6e <28c5fdce9dd955d2baf5e28987819b6d7cfaf646 || >=bbd0d59809f923ea2b540cbd781b32110e249f6e <18957373920caf5cdaf5cf32e5d1d7a99ca7700a || >=bbd0d59809f923ea2b540cbd781b32110e249f6e <83f5031f2a6a49d696eb4cc0898345d12f9c6451 || >=bbd0d59809f923ea2b540cbd781b32110e249f6e <8e04823c120b376ef7dab14b60ebf6823aa16c14 | a129792b3aef15002746c13522781d92ed3522c3, 5a022ac51ad83b4ce6c898f4b9eefc65bd26b247, 6caf0e8590c0bf05a76b0d387726adf3a6f3725c, ec2e157fc9678a9bc411305a25aec3fd337d7efb, 28c5fdce9dd955d2baf5e28987819b6d7cfaf646, 18957373920caf5cdaf5cf32e5d1d7a99ca7700a, 83f5031f2a6a49d696eb4cc0898345d12f9c6451, 8e04823c120b376ef7dab14b60ebf6823aa16c14 |
Published upstream
Aug 10, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 10, 2026
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.
Quoted source text, attributed separately from HOL analysis.