{"id":"CVE-2026-68192","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-68192","summary":"wifi: brcmfmac: make release_scratchbuffers idempotent","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: brcmfmac: make release_scratchbuffers idempotent\n\nbrcmf_pcie_release_scratchbuffers() frees the shared.scratch and\nshared.ringupd DMA buffers with dma_free_coherent() but does not clear\nthe pointers afterwards, unlike the sibling release_ringbuffers() which\nNULLs commonrings/flowrings/idxbuf on release.\n\nBoth the bus_reset .reset callback (brcmf_pcie_reset) and\nbrcmf_pcie_remove() call release_scratchbuffers.  When reset teardown\nhas run before removal, remove's own teardown would call\ndma_free_coherent() a second time on the already-freed DMA allocation.\n\nNULL the pointers after free, matching release_ringbuffers(), so a later\nrelease observes that the allocation has already been released.  This\npatch makes repeated sequential release safe; the reset-work lifetime is\nhandled separately by the following patch.\n\nThis issue was found by an in-house static analysis tool.","published":"2026-08-10T12:00:10.041Z","modified":"2026-08-14T04:03:56.462026752Z","cvss":{"score":8.8,"severity":"HIGH","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Linux","name":"Kernel","fixedVersion":"6.6.148"}],"fix":null,"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/044fca8f45ba9ab6ca526163155234cf88287ff5"},{"type":"WEB","url":"https://git.kernel.org/stable/c/0ca80328df23f851c86866720d4977783c919ee6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/538c51e9d124cf656f2dd0c0394a8545efc7102d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5a045c2f0fbf029873d2295178fa0785ade35af0"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b7d1d8cb1bdca56aecebacd2896615da0acc126a"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68192.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-68192"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-14T04:03:56.462026752Z"}}