Linux Kernel up to 6.6.134/6.12.81/6.18.22/6.19.12 list_del_rcu infinite loop

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CTI Interest Score
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5.0$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in Linux Kernel up to 6.6.134/6.12.81/6.18.22/6.19.12. This affects the function list_del_rcu. Executing a manipulation can lead to infinite loop. This vulnerability is handled as CVE-2026-31642. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in Linux Kernel up to 6.6.134/6.12.81/6.18.22/6.19.12. This vulnerability affects the function list_del_rcu. The manipulation with an unknown input leads to a infinite loop vulnerability. The CWE definition for the vulnerability is CWE-835. The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop. As an impact it is known to affect availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: rxrpc: Fix call removal to use RCU safe deletion Fix rxrpc call removal from the rxnet->calls list to use list_del_rcu() rather than list_del_init() to prevent stuffing up reading /proc/net/rxrpc/calls from potentially getting into an infinite loop. This, however, means that list_empty() no longer works on an entry that's been deleted from the list, making it harder to detect prior deletion. Fix this by: Firstly, make rxrpc_destroy_all_calls() only dump the first ten calls that are unexpectedly still on the list. Limiting the number of steps means there's no need to call cond_resched() or to remove calls from the list here, thereby eliminating the need for rxrpc_put_call() to check for that. rxrpc_put_call() can then be fixed to unconditionally delete the call from the list as it is the only place that the deletion occurs.

The advisory is shared for download at git.kernel.org. This vulnerability was named CVE-2026-31642 since 03/09/2026. The exploitation appears to be difficult. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 310510 (Linux Distros Unpatched Vulnerability : CVE-2026-31642), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.6.135, 6.12.82, 6.18.23 or 6.19.13 eliminates this vulnerability. Applying the patch 93fc15be44a35b8e3c58d0238ac0d9b7c53465ff/c63abf25203b50243fe228090526f9dbf37727bd/3be718f659683ad89fad6f1eb66bee99727cae64/ac5f54691be06a32246179d41be2d73598036deb/146d4ab94cf129ee06cd467cb5c71368a6b5bad6 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (310510) and CERT Bund (WID-SEC-2026-1279). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

  • Google Container-Optimized OS
  • Debian Linux
  • Red Hat Enterprise Linux
  • Oracle Linux
  • Open Source Linux Kernel

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.1
VulDB Meta Temp Score: 5.0

VulDB Base Score: 4.8
VulDB Temp Score: 4.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔒

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Infinite loop
CWE: CWE-835 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 310510
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-31642

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.6.135/6.12.82/6.18.23/6.19.13
Patch: 93fc15be44a35b8e3c58d0238ac0d9b7c53465ff/c63abf25203b50243fe228090526f9dbf37727bd/3be718f659683ad89fad6f1eb66bee99727cae64/ac5f54691be06a32246179d41be2d73598036deb/146d4ab94cf129ee06cd467cb5c71368a6b5bad6

Timelineinfo

03/09/2026 CVE reserved
04/24/2026 +45 days Advisory disclosed
04/24/2026 +0 days VulDB entry created
06/04/2026 +41 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-31642 (🔒)
GCVE (CVE): GCVE-0-2026-31642
GCVE (VulDB): GCVE-100-359416
CERT Bund: WID-SEC-2026-1279 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 04/24/2026 17:59
Updated: 06/04/2026 05:06
Changes: 04/24/2026 17:59 (58), 04/28/2026 08:41 (2), 05/26/2026 12:28 (7), 06/04/2026 05:06 (11)
Complete: 🔍
Cache ID: 216::103

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