CVE-2025-39990

bpf: Check the helper function is valid in get_helper_proto

At a glance

Severity: HIGH 7.8
EPSS: EPSS 0.19 % · percentile 9 (2026-10-27)
State: PUBLISHED
Published: 2025-10-15
Updated: 2026-10-21
Assigner: Linux
NVD status: Deferred

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

Scores

Version	Score	Vector	Scored by
CVSS 3.1	HIGH 7.8	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	Linux
CVSS 3.1	HIGH 7.8	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	NVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary)

European references

ENISA EUVD · EUVD-2025-34583
GCVE · GCVE-0-2025-39990

CERT-FR advisories

CERTFR-2026-AVI-1203 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
CERTFR-2026-AVI-0326 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
CERTFR-2026-AVI-0316 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
CERTFR-2026-AVI-0059 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
CERTFR-2025-AVI-0899 — Multiples vulnérabilités dans les produits Microsoft · cert.ssi.gouv.fr

Affected products

Product	Versions
Linux · Linux	affected f470378c7562a2818b45ed11c98973f2b89eedd3 < dfbff47f120e4b0793ca0e0b8660361ccac25a74 ; affected f470378c7562a2818b45ed11c98973f2b89eedd3 < 3d429cb1278e995e22995ef117fa96d223a67e93 ; affected f470378c7562a2818b45ed11c98973f2b89eedd3 < 6233715b4b714068d6c831d214a4e8792109875a ; affected f470378c7562a2818b45ed11c98973f2b89eedd3 < e4414b01c1cd9887bbde92f946c1ba94e40d6d64
Linux · Linux	affected 5.8 ; unaffected 0 < 5.8 ; unaffected 6.6.160 ≤ 6.6.* ; unaffected 6.12.50 ≤ 6.12.* ; unaffected 6.16.10 ≤ 6.16.* ; unaffected 6.17 ≤ *

References

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)	Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD