CVE-2026-90347

CVE CVE-2026-90347EUVD EUVD-2026-82008Published 2026-09-17T16:08:56.000ZLast changed 2026-09-18T17:54:46.000ZCVSS 8.4

What the advisory describes

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.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

• Linux — Linux a5cd110cb8369d6b37ef5ccfe56b3fa1338c9615 <88b839ce497ccb1ff92f7ae742c78dd2937ba572; patch: 7.2.6; patch: 7.3-rc1; patch: 0; 4.8; a5cd110cb8369d6b37ef5ccfe56b3fa1338c9615 <f433869f23841a50455c4087d85540d5b4d37cde

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.

• Linux — Linux

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