5.7

CVE-2026-64507: linux

CVSS: 5.7v4.0MediumReceived
AliasesUBUNTU-CVE-2026-64507DEBIAN-CVE-2026-64507
Published 25-07-2026Last modified 19-08-2026
Open JSON

Vulnerability summary

CVE-2026-64507 is a medium (CVSS 5.7) vulnerability in linux. EPSS estimates a 0.16% chance of exploitation in the next 30 days, higher than 4.9% of scored vulnerabilities.

Overall risk
23/100
0100
Low · default modelHow is this calculated?
CVSS score
5.7/10
010
Medium · v4.0 (OSV · Ubuntu), selected by version preference
EPSS score
0.16%
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 25 · Related 23
OPENSUSE-SU-2026:11476-1OPENSUSE-SU-2026:21910-1RHSA-2026:81406RHSA-2026:81552SUSE-SU-2026:23881-1SUSE-SU-2026:23887-1

Timeline

  1. 25-07-2026
    PublishedVulnerability first disclosed.
  2. 19-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: x86/bugs: Enable IBPB flush on BPF JIT allocation Enable hardening against JIT spraying when Spectre-v2 mitigations are in use. Specifically, issue an IBPB flush on BPF JIT memory reuse. Skip enabling the IBPB flush if the BPF dispatcher is already using a retpoline sequence. This hardening applies only when BPF-JIT is in use. Guard the enabling under CONFIG_BPF_JIT so that bugs.c still builds with CONFIG_BPF_JIT=n.

CVSS metrics

1 score · 1 source · 1 version

EPSS trend

Probability

0.16%

Chance of exploitation in the next 30 days

Percentile

5%

Versus all other CVEs

30-day change

0.00 pp

From 0.16% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.16%

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

Ubuntu169 products
  • linuxAll versions (No fix recorded) | < 6.8.0-147.147 | < 7.0.0-31.31
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 6.8.0-1067.70 | < 7.0.0-1012.12
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian2 products
  • linux< 6.1.187-1 | < 6.12.100-1 | < 7.1.4-1
  • linux-6.12< 6.12.100-1~deb12u1
Linux1 product
  • linux≥ 57631054fae6dcc9c892ae6310b58bbb6f6e5048, < 25dbcd31781e2bc3cd63d873af1fcd06f863a126 | ≥ 57631054fae6dcc9c892ae6310b58bbb6f6e5048, < cb27f3bf915cc0f20fc0c48da9059304e39ebd35 | ≥ 57631054fae6dcc9c892ae6310b58bbb6f6e5048, < 9354248fc1c33a844ca1872761f6668b393e8c37 | ≥ 57631054fae6dcc9c892ae6310b58bbb6f6e5048, < 8a4c8af9ae67eb072d90d1b339f14d27a82bd2a1 | ≥ 57631054fae6dcc9c892ae6310b58bbb6f6e5048, < 52440e15d9628f8f239373c0f2e5e8f92feea2df | ≥ 57631054fae6dcc9c892ae6310b58bbb6f6e5048, < a3af84b0fa00ead01fcd0e28b5d773ff25990a0d | 5.18

3 vendors · 172 products

References

24 links
Show all 24 references