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CVE-2026-90306

ARM: 9481/2: breakpoint: CFI breakpoints only on demand

In the Linux kernel, the following vulnerability has been resolved:

ARM: 9481/2: breakpoint: CFI breakpoints only on demand

This removes the stub hw_breakpoint_cfi_handler() from ARM, making
it not steal breakpoint type 0x03 (ARM_ENTRY_CFI_BREAKPOINT) unless
CFI is actively used in the kernel.

When not instrumenting with CFI, or when a breakpoint is issued in
userspace, we fall through to return 1 from hw_breakpoint_pending()
"unhandled fault" so userspace can make use of this breakpoint.

Tested with LKDTM and this command line:
echo CFI_FORWARD_PROTO > /sys/kernel/debug/provoke-crash/DIRECT
still works as expected.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerLinux
≫
Produkt Linux
Default Statusunaffected
Version c3f89986fde7bb9ccc86a901bf28e1f7d69fc3b3
Version < 314f1a6762b5d51b37784ed7dc701d4c3d893703
Status affected
Version c3f89986fde7bb9ccc86a901bf28e1f7d69fc3b3
Version < da64b150e4b7bee615b33ab21f3137c31ec36922
Status affected
Version c3f89986fde7bb9ccc86a901bf28e1f7d69fc3b3
Version < 8ed9bff906cf8036531d1559f10e82733a52b41f
Status affected
HerstellerLinux
≫
Produkt Linux
Default Statusaffected
Version 6.10
Status affected
Version 0
Version < 6.10
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% 0.102
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/314f1a6762b5d51b37784ed7dc701d4c3d893703
https://git.kernel.org/stable/c/da64b150e4b7bee615b33ab21f3137c31ec36922
https://git.kernel.org/stable/c/8ed9bff906cf8036531d1559f10e82733a52b41f