CVE-2026-31631: rxrpc: Fix buffer overread in rxgk_do_verify_authenticator()
In the Linux kernel, the following vulnerability has been resolved:
rxrpc: Fix buffer overread in rxgkdoverifyauthenticator()
Fix rxgkdoverifyauthenticator() to check the buffer size before checking the nonce.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
ubuntu/linux-nvidiato a version that resolves this vulnerability.Fixed in 7.0.0-1006.6 - Upgrade
Upgrade
debian/linuxto a version that resolves this vulnerability.Fixed in 6.19.13-1 - Upgrade
Upgrade
debian/linuxto a version that resolves this vulnerability.Fixed in 6.1.176-1Fixed in 6.1.190-1Fixed in 6.12.107-1Fixed in 6.12.116-1Fixed in 7.2.15-1Fixed in 7.3.4-1 - Compensating control
Modify rxgk_do_verify_authenticator() to check the buffer size before checking the nonce.
Event History
Frequently Asked Questions
What is the severity of CVE-2026-31631?
CVE-2026-31631 is categorized as having a medium severity level due to its potential for causing a buffer overread.
How do I fix CVE-2026-31631?
To fix CVE-2026-31631, update your Linux kernel to a version that includes the patch addressing this vulnerability.
Which versions of the Linux kernel are affected by CVE-2026-31631?
CVE-2026-31631 affects various versions of the Linux kernel from 6.16.1 up to 6.19.13 and specific release candidates of version 7.0.
What are the implications of CVE-2026-31631 on system security?
The implications of CVE-2026-31631 on system security include potential unauthorized access to sensitive data due to the ability to exploit a buffer overread.
Is there a workaround for CVE-2026-31631?
Currently, there are no officially recommended workarounds for CVE-2026-31631, so it is advised to apply the kernel patch as soon as possible.