CVE-2026-74390
CVE CVE-2026-74390EUVD EUVD-2026-59537Published 2026-08-15T05:59:04.000ZLast changed 2026-08-17T05:46:38.000ZCVSS 7.8
What the advisory describes
In the Linux kernel, the following vulnerability has been resolved: RDMA/irdma: Fix out-of-bounds write in irdma_copy_user_pgaddrs The irdma_copy_user_pgaddrs function loops through all of the umem DMA blocks to populate the PBLEs and will stop when either the last DMA block is reached or palloc->total_cnt is reached. The issue is that the logic for checking palloc->total_cnt would only work for non-zero values. When irdma_setup_pbles is called with lvl==0, it calls irdma_copy_user_pgaddrs with palloc->total_cnt==0, which means the only way to break out of the loop is to reach the last umem DMA block, which means it could end up going beyond the fixed size of 4 iwmr->pgaddrmem array that is used in the lvl==0 case. In the case of QP/CQ/SRQ rings, the value of lvl is determined by a separate input (for example, req.cq_pages in the case of a CQ). So, we must perform explicit checking to ensure we don't overflow the pgaddrmem array if the user provides a umem that consists of more blocks than their provided req.cq_pages.
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 5.14; patch: 6.6.145; patch: 6.12.97; patch: 5.15.212; b48c24c2d710cf34810c555dcef883a3d35a9c08 <5ebb3ed757be3e04cf803026004aa0beaeb13e9b; patch: 7.2; b48c24c2d710cf34810c555dcef883a3d35a9c08 <424d51d33c7541a86934067c2c0538124687fc90; b48c24c2d710cf34810c555dcef883a3d35a9c08 <192a3be0e3759daa24af2841208b074ca6dbaabc; b48c24c2d710cf34810c555dcef883a3d35a9c08 <4780f58672ee6328accd54a95f9c00683477e499; patch: 6.18.40; patch: 6.1.178; b48c24c2d710cf34810c555dcef883a3d35a9c08 <abd27a977b419d584efa659488c22d2306987b29; b48c24c2d710cf34810c555dcef883a3d35a9c08 <9f8f0d2099e3de1194e37dc933ae0c4206b09aaf; patch: 0; b48c24c2d710cf34810c555dcef883a3d35a9c08 <79a20a8e201a779224b4bf115250a7713bde72c0; patch: 7.1.5
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
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Linux — Linux
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