wifi: brcmfmac: make release_scratchbuffers idempotent
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.
CVE-2026-68192
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-68192
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4684997d9eea29380000e062755aa6d368d789a3",
"lessThan": "81c58a206d1deee01f4c29236d4154c0872f2a38",
"versionType": "git"
},
{
"status": "affected",
"version": "4684997d9eea29380000e062755aa6d368d789a3",
"lessThan": "382ee00b2d1e31869ae576a60d3fbe7a2153512f",
"versionType": "git"
},
{
"status": "affected",
"version": "4684997d9eea29380000e062755aa6d368d789a3",
"lessThan": "739b686aecdb14a6065300ea53401f043e51fd22",
"versionType": "git"
},
{
"status": "affected",
"version": "4684997d9eea29380000e062755aa6d368d789a3",
"lessThan": "b7d1d8cb1bdca56aecebacd2896615da0acc126a",
"versionType": "git"
},
{
"status": "affected",
"version": "4684997d9eea29380000e062755aa6d368d789a3",
"lessThan": "5a045c2f0fbf029873d2295178fa0785ade35af0",
"versionType": "git"
},
{
"status": "affected",
"version": "4684997d9eea29380000e062755aa6d368d789a3",
"lessThan": "044fca8f45ba9ab6ca526163155234cf88287ff5",
"versionType": "git"
},
{
"status": "affected",
"version": "4684997d9eea29380000e062755aa6d368d789a3",
"lessThan": "0ca80328df23f851c86866720d4977783c919ee6",
"versionType": "git"
},
{
"status": "affected",
"version": "4684997d9eea29380000e062755aa6d368d789a3",
"lessThan": "538c51e9d124cf656f2dd0c0394a8545efc7102d",
"versionType": "git"
}
],
"programFiles": [
"drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.2"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.2",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.265",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.216",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.183",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.148",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.101",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.42",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.6",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-68192
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #41151 · Revision 1
- Added to Heist Feed
- Publisher date