CVE-2026-31640
- Source
- https://cve.org/CVERecord?id=CVE-2026-31640
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-31640.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-31640
- Downstream
- Published
- 2026-04-24T14:44:54.024Z
- Modified
- 2026-07-08T07:01:43.211570398Z
- Severity
-
- 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- rxrpc: Fix use of wrong skb when comparing queued RESP challenge serial
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
rxrpc: Fix use of wrong skb when comparing queued RESP challenge serial
In rxrpcpostresponse(), the code should be comparing the challenge serial number from the cached response before deciding to switch to a newer response, but looks at the newer packet private data instead, rendering the comparison always false.
Fix this by switching to look at the older packet.
Fix further[1] to substitute the new packet in place of the old one if newer and also to release whichever we don't use.
- Database specific
{ "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31640.json", "cna_assigner": "Linux" }- References
-
- https://git.kernel.org/stable/c/20386e7f8d97475b8d815873e246423317ec4260
- https://git.kernel.org/stable/c/9132b1a7bf83b4a8042fffbc99d075b727a16742
- https://git.kernel.org/stable/c/b33f5741bb187db8ff32e8f5b96def77cc94dfca
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31640.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-31640
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git