What is CVE-2025-39990?

CVE-2025-39990 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, affecting Linux kernel versions from 5.8 onward and patched in 6.12.50, 6.16.10 and 6.17. CVE-2025-39990 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2025-39990?

CVE-2025-39990 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-2025-39990?

Yes, CVE-2025-39990 has been patched. Fixed versions include 6.12.50, 6.16.10 and 6.17. If you are running Linux kernel 5.8 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2025-39990 actively exploited?

CVE-2025-39990 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2025-39990

High

In the Linux kernel, the following vulnerability has been resolved: bpf: Check the helper function is valid in get_helper_proto kernel test robot reported verifier bug [1] where the helper func pointer could be NULL due to disabled config option. As Alexei suggested we could check on that in get_helper_proto directly. Marking tail_call helper func with BPF_PTR_POISON, because it is unused by design. [1] https://lore.kernel.org/oe-lkp/[email protected]

Package Linux Kernel

Published 2025-10-15

Last modified 2026-07-30

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 5.8 and later are affected. Fixed in 6.12.50, 6.16.10, 6.17 and their respective stable series.

Affected from

≥ 5.8

Fixed in

✓ 6.12.50 6.12.x ✓ 6.16.10 6.16.x ✓ 6.17

References

3 total

Details

CVE ID CVE-2025-39990

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2025-10-15

Modified 2026-07-30

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2025-39990?

CVE-2025-39990 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 . It affects Linux kernel versions from 5.8 onward and has been patched in 6.12.50, 6.16.10 and 6.17. CVE-2025-39990 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2025-39990?

CVE-2025-39990 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-2025-39990?

Yes. CVE-2025-39990 has been patched. Fixed versions include 6.12.50, 6.16.10 and 6.17. If you are running Linux kernel 5.8 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2025-39990 actively exploited?

No. CVE-2025-39990 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.