kernel: rseq: Fix segfault on registration when rseq_cs is non-zero

In the Linux kernel, the following vulnerability has been resolved: rseq: Fix segfault on registration when rseqcs is non-zero The rseqcs field is documented as being set to 0 by user-space prior to registration, however this is not currently enforced by the kernel. This can result in a segfault ...

rseq: Fix segfault on registration when rseq_cs is non-zero

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UBUNTU-CVE-2025-38067

In the Linux kernel, the following vulnerability has been resolved: rseq: Fix segfault on registration when rseqcs is non-zero The rseqcs field is documented as being set to 0 by user-space prior to registration, however this is not currently enforced by the kernel. This can result in a segfault ...