7.8

CVE-2026-90392: bpf: Fix potential UAF when reading bpf link info

Received
AliasesUBUNTU-CVE-2026-90392DEBIAN-CVE-2026-90392
Published 17-09-2026Last modified 19-10-2026

Vulnerability summary

CVE-2026-90392 is a high (CVSS 7.8) vulnerability in linux. EPSS estimates a 0.16% chance of exploitation in the next 30 days, higher than 5.2% 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
0.16%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1 · Related 1
OPENSUSE-SU-2026:11893-1

Timeline

  1. 17-09-2026
    PublishedVulnerability first disclosed.
  2. 19-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix potential UAF when reading bpf link info In bpf_link_show_fdinfo and bpf_link_get_info_by_fd, link->prog is accessed without holding any locks. If the prog is concurrently replaced via bpf_link_update, the old prog can be freed, leading to a potential UAF issue. Fix this by accessing link->prog under RCU protection to safely fetch the pointer and guarantee its lifetime while reading its fields.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.16%

Chance of exploitation in the next 30 days

Percentile

5%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.16% on 22-09-2026

22-09-202622-10-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Ubuntu157 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)
Debian2 products
  • linuxAll versions (No fix recorded) | < 6.12.111-1 | < 7.2.6-1
  • linux-6.12< 6.12.111-1~deb12u1
Linux1 product
  • linux≥ 0c991ebc8c69d29b7fc44db17075c5aa5253e2ab, < a5c936ac904767fc1d943d40b0308bcb2ae2509b | ≥ 0c991ebc8c69d29b7fc44db17075c5aa5253e2ab, < d7d7208e2603b45724b684f4df73904fb347741e | ≥ 0c991ebc8c69d29b7fc44db17075c5aa5253e2ab, < 85cf991c881e7198be32be05a9daa2625390c8b3 | ≥ 0c991ebc8c69d29b7fc44db17075c5aa5253e2ab, < 79347e42cfbc9e78872922e8f08a70609c9af82f | ≥ 0c991ebc8c69d29b7fc44db17075c5aa5253e2ab, < 863f3ddd0b8ac65abfb50d3be0869268ac0e277b | 5.7

3 vendors · 160 products

References

10 links