What is CVE-2026-64082?

CVE-2026-64082 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, affecting Linux kernel versions from 5.19 onward and patched in 6.1.187, 6.6.156, 6.12.108 and others. CVE-2026-64082 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-64082?

CVE-2026-64082 has a CVSS score of 7.8 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2026-64082?

Yes, CVE-2026-64082 has been patched. Fixed versions include 6.1.187, 6.6.156, 6.12.108 and others. If you are running Linux kernel 5.19 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-64082 actively exploited?

CVE-2026-64082 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-64082

High

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.

Package Linux Kernel

Published 2026-07-19

Last modified 2026-09-02

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

7.8

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected versions

Linux kernel versions 5.19 and later are affected. Fixed in 6.1.187, 6.6.156, 6.12.108, 6.18.49, 7.0.11, 7.1 and their respective stable series.

Affected from

≥ 5.19

Fixed in

✓ 6.1.187 6.1.x ✓ 6.6.156 6.6.x ✓ 6.12.108 6.12.x ✓ 6.18.49 6.18.x ✓ 7.0.11 7.0.x ✓ 7.1

References

6 total

Showing 5 of 6 references View all on NVD

Details

CVE ID CVE-2026-64082

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2026-07-19

Modified 2026-09-02

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-64082?

CVE-2026-64082 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 . It affects Linux kernel versions from 5.19 onward and has been patched in 6.1.187, 6.6.156, 6.12.108 and others. CVE-2026-64082 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-64082?

CVE-2026-64082 has a CVSS score of 7.8 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2026-64082?

Yes. CVE-2026-64082 has been patched. Fixed versions include 6.1.187, 6.6.156, 6.12.108 and others. If you are running Linux kernel 5.19 or later up to the fix versions, apply the relevant patch for your kernel branch.
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.