CVE-2026-31482
- Source
- https://cve.org/CVERecord?id=CVE-2026-31482
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-31482.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2026-31482
- Downstream
- Published
- 2026-04-22T13:54:08.888Z
- Modified
- 2026-06-18T03:56:22.444567918Z
- Summary
- s390/entry: Scrub r12 register on kernel entry
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
s390/entry: Scrub r12 register on kernel entry
Before commit f33f2d4c7c80 ("s390/bp: remove TIFISOLATEBP"), all entry handlers loaded r12 with the current task pointer (lg %r12,_LCCURRENT) for use by the BPENTER/BPEXIT macros. That commit removed TIFISOLATEBP, dropping both the branch prediction macros and the r12 load, but did not add r12 to the register clearing sequence.
Add the missing xgr %r12,%r12 to make the register scrub consistent across all entry points.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31482.json" }- References
-
- https://git.kernel.org/stable/c/0738d395aab8fae3b5a3ad3fc640630c91693c27
- https://git.kernel.org/stable/c/7f4e3233faa8470dd0627bc49b2809f2bfebd909
- https://git.kernel.org/stable/c/95c899cd791803a5bf7b73e5994fbbe1cc1a9c36
- https://git.kernel.org/stable/c/99a8b420f3f0e162eb9c9c9253929d4d23f9bd30
- https://git.kernel.org/stable/c/a58d298a83a3a9b7ca99ded9d60a1e77231159ef
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31482.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-31482
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedf33f2d4c7c80c641f6ca3dfe5e7dfe1f91543780Fixeda58d298a83a3a9b7ca99ded9d60a1e77231159efFixed95c899cd791803a5bf7b73e5994fbbe1cc1a9c36Fixed7f4e3233faa8470dd0627bc49b2809f2bfebd909Fixed99a8b420f3f0e162eb9c9c9253929d4d23f9bd30Fixed0738d395aab8fae3b5a3ad3fc640630c91693c27