CVE-2026-23335: Linux kernel · RDMA/irdma: Fix kernel stack leak in irdma_create_user_ah()
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in cfe962216c164fe2b1c1fb6ac925a7413f5abc84 : update Linux kernel when convenient.
Data as of 5 Nov 2026, 21:49 UTC
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
Disclosed: evidence found.
CVE published 25 Mar 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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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
- git.kernel.org/stable/c/1f70df004fdd944653013ccc2e1dfd472a693b46 (opens in a new tab)
- git.kernel.org/stable/c/14b47c07c69930254f549a17ee245c80a65b1609 (opens in a new tab)
- git.kernel.org/stable/c/1b1fac4c7a3ab7f52e9cfb91e5c91216646ca4d8 (opens in a new tab)
- git.kernel.org/stable/c/2fd37450d271d74b3847baed284f9cfdf198c6f8 (opens in a new tab)
- git.kernel.org/stable/c/cfe962216c164fe2b1c1fb6ac925a7413f5abc84 (opens in a new tab)
- git.kernel.org/stable/c/c9bd0007c4bdb7806bbd323287e50f9cf467c51a (opens in a new tab)
- git.kernel.org/stable/c/74586c6da9ea222a61c98394f2fc0a604748438c (opens in a new tab)
- cert-portal.siemens.com/productcert/html/ssa-082556.html (opens in a new tab)
- cert-portal.siemens.com/productcert/html/ssa-019113.html (opens in a new tab)
- cert-portal.siemens.com/productcert/html/ssa-457936.html (opens in a new tab)