CVE-2026-74346None▾ SunlitIn the Linux kernel, the following vulnerability has been resolved: RDMA/irdma: Fix OOB read during CQ MR registration Sashiko pointed out an unrelated bug during a previous patch: https://sashiko.dev/#/patchset/20260512183852.614045-1…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Nov 6.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.2%
In the Linux kernel, the following vulnerability has been resolved:
RDMA/irdma: Fix OOB read during CQ MR registration
Sashiko pointed out an unrelated bug during a previous patch: https://sashiko.dev/#/patchset/20260512183852.614045-1-jmoroni%40google.com
This change fixes the bug by eliminating the cqmr->split field which was not being set properly and instead just checks the CQ resize feature flag directly.
The cqmr->split field essentially tracks whether IRDMA_FEATURE_CQ_RESIZE is set, but it was not being set until CQ creation time, which is after CQ memory registration (the only other place where it is referenced).
As a result, it would always be false during MR registration and would therefore cause irdma_handle_q_mem to populate cqmr->shadow even for GEN_2 HW and beyond:
cqmr->shadow = (dma_addr_t)arr[req->cq_pages];
The issue is that for GEN_2 and beyond, req->cq_pages may be exactly equal to iwmr->page_cnt and therefore equal to the size of arr, which would cause an OOB read by one.
Linux >= b48c24c2d710cf34810c555dcef883a3d35a9c08 < a80b3b13786e9ab1c52b31a1f16c7d6708fa9220Linux >= b48c24c2d710cf34810c555dcef883a3d35a9c08 < 3159c6fac43dc24b34d31971884d98a7a1bf4c4bLinux >= b48c24c2d710cf34810c555dcef883a3d35a9c08 < ad360a31092a870633ec255b96f50181628b4de0Linux >= b48c24c2d710cf34810c555dcef883a3d35a9c08 < d566002de555b18cc395012c5c1cb8682fc6d2a9Linux >= b48c24c2d710cf34810c555dcef883a3d35a9c08 < 54cab78df0375196aaec4e3109191653d21751dfLinux >= b48c24c2d710cf34810c555dcef883a3d35a9c08 < d5aa82da8f65562da996d184686db9d0ea718b91Linux >= b48c24c2d710cf34810c555dcef883a3d35a9c08 < 4385ddd654d90245eeb83b3cb539670ab5c85ba4Linux 5.14Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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