Linux Kernel up to 7.0-rc1 irdma irdma_create_user_ah memory leak

CVSS Meta Temp Score
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CTI Interest Score
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5.5$0-$5k1.56

Summaryinfo

A vulnerability classified as critical was found in Linux Kernel up to 7.0-rc1. This affects the function irdma_create_user_ah of the component irdma. Executing a manipulation can lead to memory leak. This vulnerability is registered as CVE-2026-23335. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as critical was found in Linux Kernel up to 7.0-rc1. This vulnerability affects the function irdma_create_user_ah of the component irdma. The manipulation with an unknown input leads to a memory leak vulnerability. The CWE definition for the vulnerability is CWE-401. The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory. As an impact it is known to affect availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: RDMA/irdma: Fix kernel stack leak in irdma_create_user_ah() struct irdma_create_ah_resp { // 8 bytes, no padding __u32 ah_id; // offset 0 - SET (uresp.ah_id = ah->sc_ah.ah_info.ah_idx) __u8 rsvd[4]; // offset 4 - NEVER SET <- LEAK }; rsvd[4]: 4 bytes of stack memory leaked unconditionally. Only ah_id is assigned before ib_respond_udata(). The reserved members of the structure were not zeroed.

The advisory is shared for download at git.kernel.org. This vulnerability was named CVE-2026-23335 since 01/13/2026. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 303738 (Linux Distros Unpatched Vulnerability : CVE-2026-23335), 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-rc2 eliminates this vulnerability. Applying the patch 14b47c07c69930254f549a17ee245c80a65b1609/1b1fac4c7a3ab7f52e9cfb91e5c91216646ca4d8/2fd37450d271d74b3847baed284f9cfdf198c6f8/cfe962216c164fe2b1c1fb6ac925a7413f5abc84/c9bd0007c4bdb7806bbd323287e50f9cf467c51a/74586c6da9ea222a61c98394f2fc0a604748438c 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 (303738). Once again VulDB remains the best source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.7
VulDB Meta Temp Score: 5.5

VulDB Base Score: 5.7
VulDB Temp Score: 5.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

Class: Memory leak
CWE: CWE-401 / CWE-404
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: 303738
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-23335

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-rc2
Patch: 14b47c07c69930254f549a17ee245c80a65b1609/1b1fac4c7a3ab7f52e9cfb91e5c91216646ca4d8/2fd37450d271d74b3847baed284f9cfdf198c6f8/cfe962216c164fe2b1c1fb6ac925a7413f5abc84/c9bd0007c4bdb7806bbd323287e50f9cf467c51a/74586c6da9ea222a61c98394f2fc0a604748438c

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-2026-23335 (🔒)
GCVE (CVE): GCVE-0-2026-23335
GCVE (VulDB): GCVE-100-353080

Entryinfo

Created: 03/25/2026 13:25
Updated: 03/30/2026 06:54
Changes: 03/25/2026 13:25 (59), 03/26/2026 05:57 (2), 03/30/2026 06:54 (1)
Complete: 🔍
Cache ID: 216:A6D:103

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