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.
CVE-2026-90306
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-2026-90306
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": "c3f89986fde7bb9ccc86a901bf28e1f7d69fc3b3",
"lessThan": "314f1a6762b5d51b37784ed7dc701d4c3d893703",
"versionType": "git"
},
{
"status": "affected",
"version": "c3f89986fde7bb9ccc86a901bf28e1f7d69fc3b3",
"lessThan": "da64b150e4b7bee615b33ab21f3137c31ec36922",
"versionType": "git"
},
{
"status": "affected",
"version": "c3f89986fde7bb9ccc86a901bf28e1f7d69fc3b3",
"lessThan": "8ed9bff906cf8036531d1559f10e82733a52b41f",
"versionType": "git"
}
],
"programFiles": [
"arch/arm/kernel/hw_breakpoint.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.10"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.10",
"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": [
"arch/arm/kernel/hw_breakpoint.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-90306
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #36660 · Revision 1
- Added to Heist Feed
- Publisher date