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CVE-2026-90272

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.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerLinux
≫
Produkt Linux
Default Statusunaffected
Version 58074a0fce66c6c97b35ce8a28ed4e7b780f9a8f
Version < 57b72442c1672963fd51ab441ca1b71f6dc79b66
Status affected
Version 58074a0fce66c6c97b35ce8a28ed4e7b780f9a8f
Version < 988e11b69ef9d4034e19c64407030fa948580c3d
Status affected
Version 58074a0fce66c6c97b35ce8a28ed4e7b780f9a8f
Version < 7c3b63386c27bed8d59a4b4c283d02860420eb0a
Status affected
HerstellerLinux
≫
Produkt Linux
Default Statusaffected
Version 6.17
Status affected
Version 0
Version < 6.17
Status unaffected
Version <= 6.18.*
Version 6.18.52
Status unaffected
Version <= 7.2.*
Version 7.2.6
Status unaffected
Version <= *
Version 7.3-rc1
Status unaffected
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.2% 0.099
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
Es wurden noch keine Informationen zu CWE veröffentlicht.
https://git.kernel.org/stable/c/57b72442c1672963fd51ab441ca1b71f6dc79b66
https://git.kernel.org/stable/c/988e11b69ef9d4034e19c64407030fa948580c3d
https://git.kernel.org/stable/c/7c3b63386c27bed8d59a4b4c283d02860420eb0a