perf: arm_pmuv3: Zero initialize hw_id branch stack field
In the Linux kernel, the following vulnerability has been resolved: perf: arm_pmuv3: Zero initialize hw_id branch stack field PERF_SAMPLE_BRANCH_HW_INDEX is supported by BRBE so hw_id is passed to userspace, but it's never set by the BRBE driver. Zero initialize it as it should be according to the docs: * For the architectures whose raw branch records are * already stored in age order, the hw_idx should be 0. It's probably too risky to remove PERF_SAMPLE_BRANCH_HW_INDEX from BRBE now in case anyone is setting it and reading the value, but zero initializing the whole struct also protects against the same issue with new fields that are added in the future.
CVE-2026-90272
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-2026-90272
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": "58074a0fce66c6c97b35ce8a28ed4e7b780f9a8f",
"lessThan": "57b72442c1672963fd51ab441ca1b71f6dc79b66",
"versionType": "git"
},
{
"status": "affected",
"version": "58074a0fce66c6c97b35ce8a28ed4e7b780f9a8f",
"lessThan": "988e11b69ef9d4034e19c64407030fa948580c3d",
"versionType": "git"
},
{
"status": "affected",
"version": "58074a0fce66c6c97b35ce8a28ed4e7b780f9a8f",
"lessThan": "7c3b63386c27bed8d59a4b4c283d02860420eb0a",
"versionType": "git"
}
],
"programFiles": [
"drivers/perf/arm_pmuv3.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.17"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.17",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.18.52",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.6",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/perf/arm_pmuv3.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-90272
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #36633 · Revision 1
- Added to Heist Feed
- Publisher date