Medium 5.5Published Mar 25, 2026

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

Updated under an hour ago (Oct 27, 2026, 7:40 PM ET)

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It affects Linux and 4 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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.

CVSS: 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Oct 14, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from b48c24c2d710cf34810c555dcef883a3d35a9c08 before 1f70df004fdd944653013ccc2e1dfd472a693b46; from b48c24c2d710cf34810c555dcef883a3d35a9c08 before 14b47c07c69930254f549a17ee245c80a65b1609; from b48c24c2d710cf34810c555dcef883a3d35a9c08 before 1b1fac4c7a3ab7f52e9cfb91e5c91216646ca4d8; from b48c24c2d710cf34810c555dcef883a3d35a9c08 before 2fd37450d271d74b3847baed284f9cfdf198c6f8; from b48c24c2d710cf34810c555dcef883a3d35a9c08 before cfe962216c164fe2b1c1fb6ac925a7413f5abc84; from b48c24c2d710cf34810c555dcef883a3d35a9c08 before c9bd0007c4bdb7806bbd323287e50f9cf467c51a; from b48c24c2d710cf34810c555dcef883a3d35a9c08 before 74586c6da9ea222a61c98394f2fc0a604748438c	CNA record
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518_4_pn_dp_mfp (from the name)	from V3.1.6	CISA ADP
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518f_4_pn_dp_mfp (from the name)	from V3.1.6	CISA ADP
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP siemens:siplus_s7_1500_cpu_1518_4_pn_dp_mfp (from the name)	from V3.1.6	CISA ADP
linux linux_kernel linux:linux_kernel	from 5.14.1 before 5.15.203; from 5.16 before 6.1.167; from 6.2 before 6.6.130; from 6.7 before 6.12.77; from 6.13 before 6.18.17; from 6.19 before 6.19.7; 5.14; 7.0; and 6 more ranges	NVD

References

References

https://git.kernel.org/stable/c/1f70df004fdd944653013ccc2e1dfd472a693b46	patch
https://git.kernel.org/stable/c/14b47c07c69930254f549a17ee245c80a65b1609	patch
https://git.kernel.org/stable/c/1b1fac4c7a3ab7f52e9cfb91e5c91216646ca4d8	patch
https://git.kernel.org/stable/c/2fd37450d271d74b3847baed284f9cfdf198c6f8	patch
https://git.kernel.org/stable/c/cfe962216c164fe2b1c1fb6ac925a7413f5abc84	patch
https://git.kernel.org/stable/c/c9bd0007c4bdb7806bbd323287e50f9cf467c51a	patch
https://git.kernel.org/stable/c/74586c6da9ea222a61c98394f2fc0a604748438c	patch
https://cert-portal.siemens.com/productcert/html/ssa-019113.html
https://cert-portal.siemens.com/productcert/html/ssa-082556.html
https://cert-portal.siemens.com/productcert/html/ssa-457936.html

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.