7.8

CVE-2025-39990: linux

CVSS: 7.8v3.1HighDeferred
AliasesUBUNTU-CVE-2025-39990DEBIAN-CVE-2025-39990
Published 15-10-2025Last modified 21-10-2026
Open JSON

Vulnerability summary

CVE-2025-39990 is a high (CVSS 7.8) vulnerability in linux. EPSS estimates a 0.15% chance of exploitation in the next 30 days, higher than 4% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.15%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 6 · Related 6
OPENSUSE-SU-2025:20172-1SUSE-SU-2026:20012-1SUSE-SU-2026:20015-1SUSE-SU-2026:20021-1SUSE-SU-2026:20562-1USN-8781-1

Timeline

  1. 15-10-2025
    PublishedVulnerability first disclosed.
  2. 21-10-2026
    Last modifiedVulnerability information updated.

Description

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/202507160818.68358831-lkp@intel.com

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.15%

Chance of exploitation in the next 30 days

Percentile

4%

Versus all other CVEs

30-day change

0.00 pp

From 0.15% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.15%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Ubuntu138 products
  • linuxAll versions (No fix recorded)
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian1 product
  • linuxAll versions (No fix recorded) | < 6.12.57-1 | < 6.16.10-1
Linux1 product
  • linux≥ f470378c7562a2818b45ed11c98973f2b89eedd3, < dfbff47f120e4b0793ca0e0b8660361ccac25a74 | ≥ f470378c7562a2818b45ed11c98973f2b89eedd3, < 3d429cb1278e995e22995ef117fa96d223a67e93 | ≥ f470378c7562a2818b45ed11c98973f2b89eedd3, < 6233715b4b714068d6c831d214a4e8792109875a | ≥ f470378c7562a2818b45ed11c98973f2b89eedd3, < e4414b01c1cd9887bbde92f946c1ba94e40d6d64 | 5.8

3 vendors · 140 products

References

9 links