CVE-2026-74346

CVE CVE-2026-74346EUVD EUVD-2026-59493Published 2026-08-15T05:58:34.000ZLast changed 2026-08-17T05:17:38.000Z

What the advisory describes

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.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux patch: 6.1.178; patch: 6.12.97; b48c24c2d710cf34810c555dcef883a3d35a9c08 <ad360a31092a870633ec255b96f50181628b4de0; patch: 7.1.5; patch: 5.15.212; patch: 7.2; b48c24c2d710cf34810c555dcef883a3d35a9c08 <3159c6fac43dc24b34d31971884d98a7a1bf4c4b; b48c24c2d710cf34810c555dcef883a3d35a9c08 <a80b3b13786e9ab1c52b31a1f16c7d6708fa9220; b48c24c2d710cf34810c555dcef883a3d35a9c08 <d5aa82da8f65562da996d184686db9d0ea718b91; b48c24c2d710cf34810c555dcef883a3d35a9c08 <54cab78df0375196aaec4e3109191653d21751df; 5.14; b48c24c2d710cf34810c555dcef883a3d35a9c08 <4385ddd654d90245eeb83b3cb539670ab5c85ba4; patch: 6.6.145; patch: 6.18.40; patch: 0; b48c24c2d710cf34810c555dcef883a3d35a9c08 <d566002de555b18cc395012c5c1cb8682fc6d2a9

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

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Linux — Linux

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