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
- 2026-04-24T14:44:54Z
- Modified
- 2026-08-12T03:51:47Z
- 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 rxrpc_post_response(), 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
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31640.json" }- 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