CVE-2026-68192

CVE CVE-2026-68192EUVD EUVD-2026-55293Published 2026-08-10T12:00:10.000Z

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: wifi: brcmfmac: make release_scratchbuffers idempotent brcmf_pcie_release_scratchbuffers() frees the shared.scratch and shared.ringupd DMA buffers with dma_free_coherent() but does not clear the pointers afterwards, unlike the sibling release_ringbuffers() which NULLs commonrings/flowrings/idxbuf on release. Both the bus_reset .reset callback (brcmf_pcie_reset) and brcmf_pcie_remove() call release_scratchbuffers. When reset teardown has run before removal, remove's own teardown would call dma_free_coherent() a second time on the already-freed DMA allocation. NULL the pointers after free, matching release_ringbuffers(), so a later release observes that the allocation has already been released. This patch makes repeated sequential release safe; the reset-work lifetime is handled separately by the following patch. This issue was found by an in-house static analysis tool.

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 4684997d9eea29380000e062755aa6d368d789a3 <5a045c2f0fbf029873d2295178fa0785ade35af0; 4684997d9eea29380000e062755aa6d368d789a3 <538c51e9d124cf656f2dd0c0394a8545efc7102d; patch: 6.6.148; patch: 7.2-rc5; patch: 6.18.42; patch: 0; 4684997d9eea29380000e062755aa6d368d789a3 <b7d1d8cb1bdca56aecebacd2896615da0acc126a; patch: 7.1.6; patch: 6.12.101; 4684997d9eea29380000e062755aa6d368d789a3 <0ca80328df23f851c86866720d4977783c919ee6; 4684997d9eea29380000e062755aa6d368d789a3 <044fca8f45ba9ab6ca526163155234cf88287ff5; 5.2

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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