CVE-2026-64082
In the Linux kernel, the following vulnerability has been resolved: riscv: Fix register corruption from uninitialized cregs on error compat_riscv_gpr_set() calls cregs_to_regs() unconditionally, even when user_regset_copyin() fails. Since cregs is an uninitialized stack variable, a copyin failure causes uninitialized stack data to be written into the target task's pt_regs, corrupting its register state and potentially leaking kernel stack contents. compat_restore_sigcontext() has the same issue: it calls cregs_to_regs() even when __copy_from_user() fails, leading to the same corruption of the signal-returning task's register state on error. Only call cregs_to_regs() when the user copy succeeds.
Affected versions
Linux kernel versions
5.19
and later are affected. Fixed in
7.0.11,
7.1
and their respective stable series.
References
2 totalFrequently asked questions
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What is CVE-2026-64082?
CVE-2026-64082 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 5.19 onward and has been patched in 7.0.11 and 7.1. CVE-2026-64082 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-64082?
Yes — CVE-2026-64082 has been patched. Fixed versions include 7.0.11 and 7.1. If you are running Linux kernel 5.19 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-64082 actively exploited?
No — CVE-2026-64082 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.