arm64: ptrace: Keep 'orig_x0' in-sync with x0 on syscall entry
In the Linux kernel, the following vulnerability has been resolved: arm64: ptrace: Keep 'orig_x0' in-sync with x0 on syscall entry Commit e057b9477232 ("arm64: syscall: Ensure saved x0 is kept in-sync with tracer updates") attempted to resolve a long-standing issue with syscall entry tracing, where a tracer is able to manipulate the first syscall argument without being subjected to seccomp or audit checking. Unfortunately, that fix was incomplete [1], as it failed to update 'orig_x0' between a tracer updating x0 during a seccomp ptrace exit (SECCOMP_RET_TRACE) and the seccomp filter being re-evaluated. Rather than add hooks to the core seccomp code, instead move the synchronisation code into the ptrace GPR and syscall setting code so that 'orig_x0' is kept up to date with x0 whenever we're stopped on the syscall entry path.
CVE-2026-90347
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-2026-90347
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": "a5cd110cb8369d6b37ef5ccfe56b3fa1338c9615",
"lessThan": "332c9c1a148d0425326989c1187face8f6b2a60c",
"versionType": "git"
},
{
"status": "affected",
"version": "a5cd110cb8369d6b37ef5ccfe56b3fa1338c9615",
"lessThan": "ce17c651a90e242ad48df0df89b1e4cebcda5e14",
"versionType": "git"
},
{
"status": "affected",
"version": "a5cd110cb8369d6b37ef5ccfe56b3fa1338c9615",
"lessThan": "e9e2854fcff5733ffc607e8ecc87e0e591ab41fd",
"versionType": "git"
},
{
"status": "affected",
"version": "a5cd110cb8369d6b37ef5ccfe56b3fa1338c9615",
"lessThan": "f433869f23841a50455c4087d85540d5b4d37cde",
"versionType": "git"
},
{
"status": "affected",
"version": "a5cd110cb8369d6b37ef5ccfe56b3fa1338c9615",
"lessThan": "88b839ce497ccb1ff92f7ae742c78dd2937ba572",
"versionType": "git"
}
],
"programFiles": [
"arch/arm64/kernel/ptrace.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.8"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.8",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.114",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.57",
"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/arm64/kernel/ptrace.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-90347
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #48673 · Revision 1
- Added to Heist Feed
- Publisher date