Linux Kernel up to 6.18.17/6.19.7/7.0-rc2 call_rcu state issue

CVSS Meta Temp Score
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CTI Interest Score
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6.5$0-$5k0.00

Summaryinfo

A vulnerability identified as critical has been detected in Linux Kernel up to 6.18.17/6.19.7/7.0-rc2. Impacted is the function call_rcu. The manipulation leads to state issue. This vulnerability is documented as CVE-2026-23245. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.18.17/6.19.7/7.0-rc2. It has been rated as critical. This issue affects the function call_rcu. The manipulation with an unknown input leads to a state issue vulnerability. Using CWE to declare the problem leads to CWE-371. The impact remains unknown. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: net/sched: act_gate: snapshot parameters with RCU on replace The gate action can be replaced while the hrtimer callback or dump path is walking the schedule list. Convert the parameters to an RCU-protected snapshot and swap updates under tcf_lock, freeing the previous snapshot via call_rcu(). When REPLACE omits the entry list, preserve the existing schedule so the effective state is unchanged.

The advisory is shared at git.kernel.org. The identification of this vulnerability is CVE-2026-23245 since 01/13/2026. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 06/24/2026).

The vulnerability scanner Nessus provides a plugin with the ID 302909 (Linux Distros Unpatched Vulnerability : CVE-2026-23245), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.18.18, 6.19.8 or 7.0-rc3 eliminates this vulnerability. Applying the patch 04d75529dc0f9be78786162ebab7424af4644df2/58b162e318d0243ad2d7d92456c0873f2494c351/62413a9c3cb183afb9bb6e94dd68caf4e4145f4c 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 (302909), EUVD (EUVD-2026-12808) and CERT Bund (WID-SEC-2026-0774). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Affected

  • Google Container-Optimized OS
  • Debian Linux
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • SUSE Linux
  • Oracle Linux
  • SUSE openSUSE
  • RESF Rocky Linux
  • Open Source Linux Kernel

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.6
VulDB Meta Temp Score: 6.5

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.8
CNA Vector (Linux): 🔒

CVSSv2info

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

Exploitinginfo

Class: State issue
CWE: CWE-371
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: 302909
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-23245

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.18.18/6.19.8/7.0-rc3
Patch: 04d75529dc0f9be78786162ebab7424af4644df2/58b162e318d0243ad2d7d92456c0873f2494c351/62413a9c3cb183afb9bb6e94dd68caf4e4145f4c

Timelineinfo

01/13/2026 CVE reserved
03/18/2026 +64 days Advisory disclosed
03/18/2026 +0 days VulDB entry created
06/24/2026 +97 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-23245 (🔒)
GCVE (CVE): GCVE-0-2026-23245
GCVE (VulDB): GCVE-100-351521
EUVD: 🔒
CERT Bund: WID-SEC-2026-0774 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 03/18/2026 11:58
Updated: 06/24/2026 01:43
Changes: 03/18/2026 11:58 (58), 03/18/2026 12:24 (1), 03/18/2026 16:08 (7), 03/19/2026 13:39 (2), 03/25/2026 13:10 (1), 04/29/2026 21:49 (1), 05/21/2026 22:07 (11), 06/24/2026 01:43 (1)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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