Linux Kernel up to 7.0-rc2 rawsock_release use after free

CVSS Meta Temp Score
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CTI Interest Score
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7.6$0-$5k0.16

Summaryinfo

A vulnerability was found in Linux Kernel up to 7.0-rc2. It has been rated as critical. Affected by this vulnerability is the function rawsock_release. The manipulation leads to use after free. This vulnerability is referenced as CVE-2026-23372. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel up to 7.0-rc2. This issue affects the function rawsock_release. The manipulation with an unknown input leads to a use after free vulnerability. Using CWE to declare the problem leads to CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: nfc: rawsock: cancel tx_work before socket teardown In rawsock_release(), cancel any pending tx_work and purge the write queue before orphaning the socket. rawsock_tx_work runs on the system workqueue and calls nfc_data_exchange which dereferences the NCI device. Without synchronization, tx_work can race with socket and device teardown when a process is killed (e.g. by SIGKILL), leading to use-after-free or leaked references. Set SEND_SHUTDOWN first so that if tx_work is already running it will see the flag and skip transmitting, then use cancel_work_sync to wait for any in-progress execution to finish, and finally purge any remaining queued skbs.

The advisory is shared at git.kernel.org. The identification of this vulnerability is CVE-2026-23372 since 01/13/2026. The exploitation is known to be easy. 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 03/30/2026).

The vulnerability scanner Nessus provides a plugin with the ID 303732 (Linux Distros Unpatched Vulnerability : CVE-2026-23372), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.1.167, 6.6.130, 6.12.77, 6.18.17, 6.19.7 or 7.0-rc3 eliminates this vulnerability. Applying the patch 3ae592ed91bb4b6b51df256b51045c13d2656049/722a28b635ec281bb08a23885223526d8e7d6526/78141b8832e16d80d09cbefb4258612db0777a24/edc988613def90c5b558e025b1b423f48007be06/da4515fc8263c5933ed605e396af91079806dc45/d793458c45df2aed498d7f74145eab7ee22d25aa 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 vulnerability database at Tenable (303732). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.0
VulDB Meta Temp Score: 7.6

VulDB Base Score: 8.0
VulDB Temp Score: 7.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 303732
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-23372

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.1.167/6.6.130/6.12.77/6.18.17/6.19.7/7.0-rc3
Patch: 3ae592ed91bb4b6b51df256b51045c13d2656049/722a28b635ec281bb08a23885223526d8e7d6526/78141b8832e16d80d09cbefb4258612db0777a24/edc988613def90c5b558e025b1b423f48007be06/da4515fc8263c5933ed605e396af91079806dc45/d793458c45df2aed498d7f74145eab7ee22d25aa

Timelineinfo

01/13/2026 CVE reserved
03/25/2026 +71 days Advisory disclosed
03/25/2026 +0 days VulDB entry created
03/30/2026 +5 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-23372 (🔒)
GCVE (CVE): GCVE-0-2026-23372
GCVE (VulDB): GCVE-100-353045

Entryinfo

Created: 03/25/2026 13:16
Updated: 03/30/2026 12:51
Changes: 03/25/2026 13:16 (58), 03/26/2026 07:33 (2), 03/30/2026 12:51 (1)
Complete: 🔍
Cache ID: 216:A76:103

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