arm64: percpu: Fix LSE operations on {8,16}-bit types
In the Linux kernel, the following vulnerability has been resolved: arm64: percpu: Fix LSE operations on {8,16}-bit types The assembly for __percpu_##name##_case_##sz() and __percpu_##name##_return_case_##sz() doesn't use the 'sfx' macro argument to form the LSE instruction. Without 'sfx', a W register argument will imply a 32-bit memory location, and consequently {8,16}-bit ops will erroneously read and write 32 bits of memory when the LSE instruction is used. Fix this by appending 'sfx' to 'op_lse' to LSE instruction. It is not necessary (and not valid) to append 'sfx' to 'op_llsc', as 'op_llsc' is a register-register operation which does not access memory (and does not take a size suffix).
CVE-2026-98248
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-2026-98248
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": "959bf2fd03b59fc107584c21425f3dc73c49f762",
"lessThan": "d69ab4480e49bf925f4781afcc9f284affcb96b6",
"versionType": "git"
},
{
"status": "affected",
"version": "959bf2fd03b59fc107584c21425f3dc73c49f762",
"lessThan": "390742871a723b52de9b92a94c0d1c85a2531e3e",
"versionType": "git"
},
{
"status": "affected",
"version": "959bf2fd03b59fc107584c21425f3dc73c49f762",
"lessThan": "843ace1d0a39e9b1cfcbfb3856a7b0fbdd9cd003",
"versionType": "git"
},
{
"status": "affected",
"version": "959bf2fd03b59fc107584c21425f3dc73c49f762",
"lessThan": "8cf2093f5372952a9ebc805c418d45df7112cd14",
"versionType": "git"
}
],
"programFiles": [
"arch/arm64/include/asm/percpu.h"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.0"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.0",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.12.112",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.54",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.8",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"arch/arm64/include/asm/percpu.h"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98248
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #38326 · Revision 1
- Added to Heist Feed
- Publisher date