CVE-2026-93264
CVE CVE-2026-93264EUVD EUVD-2026-86136Published 2026-09-24T15:52:03.000Z
What the advisory describes
In the Linux kernel, the following vulnerability has been resolved: RDMA/efa: Fix PBL chunk length computation On register MR, when creating the PBL, if it's an indirect PBL we create a chunk list to hold the PBL pages pointers. Each chunk is 4KB in size and can hold 510 addresses (EFA_PTRS_PER_CHUNK) and has a 12-byte control buffer at the end of it holding the next chunk's pointer and its length. If the PBL number of pages is a multiple of EFA_PTRS_PER_CHUNK, the calculated last chunk length is wrongly computed as 0, even though that chunk is fully populated with 510 real page pointers. This wrong length is used both to DMA map the chunk and is propagated to the device, causing the device to see the chunk as empty and reject the memory registration. Fix the calculation so it will be performed only if the number of pages isn't a multiple of EFA_PTRS_PER_CHUNK, if it is, its already handled in the above loop correctly. Also prevent out-of-bounds reach in the chunks array in such scenario.
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 40909f664d279765af430acc5db348a0b71c9b0a <665cd418b8561a099c3854443f8ad8ae751b72a0; 40909f664d279765af430acc5db348a0b71c9b0a <489b28f2377afa70c18c45b06a6387f3d39bb123; 40909f664d279765af430acc5db348a0b71c9b0a <1d4b5902773475fc97151379b7e5f09cad0fa57b; 40909f664d279765af430acc5db348a0b71c9b0a <3982714e15512b83115897806dacc94899683420; 40909f664d279765af430acc5db348a0b71c9b0a <aadf3f9b5edb7f0a77e9172b237d2e07c754829c; patch: 7.2.6; patch: 6.12.110; 40909f664d279765af430acc5db348a0b71c9b0a <932e5684906a090644a9061fae2d254041c3b8f2; patch: 0; patch: 6.18.52; patch: 5.10.270; 5.2; patch: 5.15.221; patch: 7.3-rc1; 40909f664d279765af430acc5db348a0b71c9b0a <229b42d7450c1cf96f45ec39ebb69211b06bc036; patch: 6.1.188; 40909f664d279765af430acc5db348a0b71c9b0a <da7805f0211af19968584e621074f253ac07dba7; patch: 6.6.157
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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