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VulnerabilityPublished Updated

CVE-2026-23335: Linux kernel · RDMA/irdma: Fix kernel stack leak in irdma_create_user_ah()

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in cfe962216c164fe2b1c1fb6ac925a7413f5abc84 : update Linux kernel when convenient.

Data as of 5 Nov 2026, 21:49 UTC

Severity
Unrated

Rated by Threat Radar · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none
CISA SSVC
Exploitation
No evidence of active exploitation and no public proof of concept
Automatable
Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact
Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-11-05.

Patch
Available – fixed in cfe962216c164fe2b1c1fb6ac925a7413f5abc84, c9bd0007c4bdb7806bbd323287e50f9cf467c51a, 74586c6da9ea222a61c98394f2fc0a604748438c +4

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 25 Mar 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • ≥ b48c24c2d710cf34810c555dcef883a3d35a9c08, < cfe962216c164fe2b1c1fb6ac925a7413f5abc84
Fixed in
  • cfe962216c164fe2b1c1fb6ac925a7413f5abc84
LinuxLinuxAffected
  • ≥ b48c24c2d710cf34810c555dcef883a3d35a9c08, < c9bd0007c4bdb7806bbd323287e50f9cf467c51a
Fixed in
  • c9bd0007c4bdb7806bbd323287e50f9cf467c51a
LinuxLinuxAffected
  • ≥ b48c24c2d710cf34810c555dcef883a3d35a9c08, < 74586c6da9ea222a61c98394f2fc0a604748438c
Fixed in
  • 74586c6da9ea222a61c98394f2fc0a604748438c
LinuxLinuxAffected
  • ≥ b48c24c2d710cf34810c555dcef883a3d35a9c08, < 14b47c07c69930254f549a17ee245c80a65b1609
Fixed in
  • 14b47c07c69930254f549a17ee245c80a65b1609
LinuxLinuxAffected
  • ≥ b48c24c2d710cf34810c555dcef883a3d35a9c08, < 2fd37450d271d74b3847baed284f9cfdf198c6f8
Fixed in
  • 2fd37450d271d74b3847baed284f9cfdf198c6f8
LinuxLinuxAffected
  • ≥ b48c24c2d710cf34810c555dcef883a3d35a9c08, < 1f70df004fdd944653013ccc2e1dfd472a693b46
Fixed in
  • 1f70df004fdd944653013ccc2e1dfd472a693b46

Description

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.

References

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