CVE-2026-31482: Linux

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: s390/entry: Scrub r12 register on kernel entry Before commit f33f2d4c7c80 ("s390/bp: remove TIF_ISOLATE_BP"), all entry handlers loaded r12 with the current task pointer (lg %r12,__LC_CURRENT) for use by the BPENTER/BPEXIT macros. That commit removed TIF_ISOLATE_BP, 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.

Засегнати продукти

• Linux Linux: f33f2d4c7c80c641f6ca3dfe5e7dfe1f91543780 преди a58d298a83a3a9b7ca99ded9d60a1e77231159ef; f33f2d4c7c80c641f6ca3dfe5e7dfe1f91543780 преди 95c899cd791803a5bf7b73e5994fbbe1cc1a9c36; f33f2d4c7c80c641f6ca3dfe5e7dfe1f91543780 преди 7f4e3233faa8470dd0627bc49b2809f2bfebd909; f33f2d4c7c80c641f6ca3dfe5e7dfe1f91543780 преди 99a8b420f3f0e162eb9c9c9253929d4d23f9bd30; f33f2d4c7c80c641f6ca3dfe5e7dfe1f91543780 преди 0738d395aab8fae3b5a3ad3fc640630c91693c27
• Linux Linux: 6.4; преди 6.4; 6.6.131 до 6.6.*; 6.12.80 до 6.12.*; 6.18.21 до 6.18.*; 6.19.11 до 6.19.*; от 7.0 нататък

История

Други уязвимости в Linux Linux

• 8.1CVE-2026-99270
• 7.8CVE-2026-99269
• CVE-2026-99268
• CVE-2026-99266
• CVE-2026-99267

Първоизточници

• https://www.cve.org/CVERecord?id=CVE-2026-31482
• https://nvd.nist.gov/vuln/detail/CVE-2026-31482
• https://git.kernel.org/stable/c/a58d298a83a3a9b7ca99ded9d60a1e77231159ef
• https://git.kernel.org/stable/c/95c899cd791803a5bf7b73e5994fbbe1cc1a9c36
• https://git.kernel.org/stable/c/7f4e3233faa8470dd0627bc49b2809f2bfebd909
• https://git.kernel.org/stable/c/99a8b420f3f0e162eb9c9c9253929d4d23f9bd30
• https://git.kernel.org/stable/c/0738d395aab8fae3b5a3ad3fc640630c91693c27