RDMA/irdma: Fix kernel stack leak in irdma_create_user_ah()
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.
02 / AFFECTED SOFTWARE
Affected packages
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
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.
05 / REFERENCES
Further evidence
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html
- https://cert-portal.siemens.com/productcert/html/ssa-082556.html
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/14b47c07c69930254f549a17ee245c80a65b1609
- https://git.kernel.org/stable/c/1b1fac4c7a3ab7f52e9cfb91e5c91216646ca4d8
- https://git.kernel.org/stable/c/1f70df004fdd944653013ccc2e1dfd472a693b46
- https://git.kernel.org/stable/c/2fd37450d271d74b3847baed284f9cfdf198c6f8
- https://git.kernel.org/stable/c/74586c6da9ea222a61c98394f2fc0a604748438c
- https://git.kernel.org/stable/c/c9bd0007c4bdb7806bbd323287e50f9cf467c51a
- https://git.kernel.org/stable/c/cfe962216c164fe2b1c1fb6ac925a7413f5abc84
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23335.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-23335