CVE-2026-68300

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Source
https://cve.org/CVERecord?id=CVE-2026-68300
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-68300.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-68300
Downstream
Published
2026-08-10T12:02:34Z
Modified
2026-08-21T03:30:45Z
Severity
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
sctp: auth: verify auth requirement when auth_chunk is NULL
Details

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.

Database specific 
{
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68300.json"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
bbd0d59809f923ea2b540cbd781b32110e249f6e
Fixed
a129792b3aef15002746c13522781d92ed3522c3
Fixed
5a022ac51ad83b4ce6c898f4b9eefc65bd26b247
Fixed
6caf0e8590c0bf05a76b0d387726adf3a6f3725c
Fixed
ec2e157fc9678a9bc411305a25aec3fd337d7efb
Fixed
28c5fdce9dd955d2baf5e28987819b6d7cfaf646
Fixed
18957373920caf5cdaf5cf32e5d1d7a99ca7700a
Fixed
83f5031f2a6a49d696eb4cc0898345d12f9c6451
Fixed
8e04823c120b376ef7dab14b60ebf6823aa16c14

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-68300.json"

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
2.6.24
Fixed
5.10.265
Type
ECOSYSTEM
Events
Introduced
5.11.0
Fixed
5.15.216
Type
ECOSYSTEM
Events
Introduced
5.16.0
Fixed
6.1.183
Type
ECOSYSTEM
Events
Introduced
6.2.0
Fixed
6.6.148
Type
ECOSYSTEM
Events
Introduced
6.7.0
Fixed
6.12.101
Type
ECOSYSTEM
Events
Introduced
6.13.0
Fixed
6.18.42
Type
ECOSYSTEM
Events
Introduced
6.19.0
Fixed
7.1.6

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-68300.json"