# CVE-2026-31635: kernel: In the Linux kernel, the following vulnerability has been resolved: rxrpc: fix oversized RESPONSE authenticator lengt...

CVE-2026-31635 is fixed in 76 products on 1 platform, first by DEBIAN-CVE-2026-31635, released May 15, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-31635
- Priority: High
- CVSS: 7.8 (moderate)
- EPSS: 0.0113
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Apr 24, 2026

## Description

In the Linux kernel, the following vulnerability has been resolved: rxrpc: fix oversized RESPONSE authenticator length check rxgk_verify_response() decodes auth_len from the packet and is supposed to verify that it fits in the remaining bytes. The existing check is inverted, so oversized RESPONSE authenticators are accepted and passed to rxgk_decrypt_skb(), which can later reach skb_to_sgvec() with an impossible length and hit BUG_ON(len). Decoded from the original latest-net reproduction logs with scripts/decode_stacktrace.sh: RIP: __skb_to_sgvec() [net/core/skbuff.c:5285 (discriminator 1)] Call Trace: skb_to_sgvec() [net/core/skbuff.c:5305] rxgk_decrypt_skb() [net/rxrpc/rxgk_common.h:81] rxgk_verify_response() [net/rxrpc/rxgk.c:1268] rxrpc_process_connection() [net/rxrpc/conn_event.c:266 net/rxrpc/conn_event.c:364 net/rxrpc/conn_event.c:386] process_one_work() [kernel/workqueue.c:3281] worker_thread() [kernel/workqueue.c:3353 kernel/workqueue.c:3440] kthread() [kernel/kthread.c:436] ret_from_fork() [arch/x86/kernel/process.c:164] Reject authenticator lengths that exceed the remaining packet payload.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | kernel RHEL 10 | 6.12.0-211.40.1.el10_2 | [RHSA-2026:47017](https://patchblox.com/security/data/fix/linux/rhsa-2026-47017.md) | Jun 26, 2026 |
| Linux | kernel almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-64k almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-64k-core almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-64k-debug almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-64k-debug-core almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-64k-debug-devel almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-64k-debug-devel-matched almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-64k-debug-modules almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-64k-debug-modules-core almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-64k-debug-modules-extra almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-64k-devel almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-64k-devel-matched almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-64k-modules almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-64k-modules-core almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-64k-modules-extra almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-abi-stablelists almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-core almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-cross-headers almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-debug almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-debug-core almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-debug-devel almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-debug-devel-matched almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-debug-modules almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-debug-modules-core almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-debug-modules-extra almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-debug-uki-virt almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-devel almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-devel-matched almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-doc almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-headers almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-modules almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-modules-core almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-modules-extra almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-modules-extra-matched almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-rt almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-rt-64k almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-rt-64k-core almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-rt-64k-debug almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-rt-64k-debug-core almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-rt-64k-debug-devel almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-rt-64k-debug-modules almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-rt-64k-debug-modules-core almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-rt-64k-debug-modules-extra almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-rt-64k-devel almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-rt-64k-modules almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-rt-64k-modules-core almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-rt-64k-modules-extra almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-rt-core almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-rt-debug almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-rt-debug-core almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-rt-debug-devel almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-rt-debug-modules almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-rt-debug-modules-core almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-rt-debug-modules-extra almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-rt-devel almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-rt-modules almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-rt-modules-core almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-rt-modules-extra almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-tools almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-tools-libs almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-tools-libs-devel almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-uki-virt almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-uki-virt-addons almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-zfcpdump almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-zfcpdump-core almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-zfcpdump-devel almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-zfcpdump-devel-matched almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-zfcpdump-modules almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-zfcpdump-modules-core almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | kernel-zfcpdump-modules-extra almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | libperf almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | linux Debian 14 | 6.19.13-1 | [DEBIAN-CVE-2026-31635](https://patchblox.com/security/data/fix/linux/debian-cve-2026-31635.md) | May 15, 2026 |
| Linux | perf almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | python3-perf almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | rtla almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |
| Linux | rv almalinux 10 | 6.12.0-211.40.1.el10_2 | [ALSA-2026:47017](https://patchblox.com/security/data/fix/linux/alsa-2026-47017.md) | Jul 28, 2026 |

---

Data as of 2026-11-09T01:18:40Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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