CVE Tools
Track your stack

CVE-2026-64507

x86/bugs: Enable IBPB flush on BPF JIT allocation

No known exploitation. EPSS puts it in the 14th percentile. Fixed versions are out.

CVSS —Not scoredEPSS percentile14th0.2% chance in 30 daysCISA KEVNot listedNo confirmed exploitation
No public exploit knownFix1 product4 fixed builds listed below

Published Updated Sources: CVE.org, NVD

NVD CVE.org

What to do

Find your product and version, then upgrade to the build on the right.

  • LinuxAffected: ≥ 57631054fae6dcc9c892ae6310b58bbb6f6e5048, < 25dbcd31781e2bc3cd63d873af1fcd06f863a126Upgrade to: 25dbcd31781e2bc3cd63d873af1fcd06f863a126Affected: ≥ 57631054fae6dcc9c892ae6310b58bbb6f6e5048, < cb27f3bf915cc0f20fc0c48da9059304e39ebd35Upgrade to: cb27f3bf915cc0f20fc0c48da9059304e39ebd35Affected: ≥ 57631054fae6dcc9c892ae6310b58bbb6f6e5048, < 9354248fc1c33a844ca1872761f6668b393e8c37Upgrade to: 9354248fc1c33a844ca1872761f6668b393e8c37Affected: ≥ 57631054fae6dcc9c892ae6310b58bbb6f6e5048, < 8a4c8af9ae67eb072d90d1b339f14d27a82bd2a1Upgrade to: 8a4c8af9ae67eb072d90d1b339f14d27a82bd2a1 + 2 more branchesStated by: CVE record

Versions as the sources state them. Full version matrix after sign-in

Check it yourselfA free OpenVAS check exists for this CVE. Run it against your hosts.Is your organisation exposed?Request an assessment to establish which checks fit your systems.

Coverage timeline

3 publishers

  1. Technical analysis published

    ·Хакер (xakep.ru) summary

Sourced from public security reporting — each date is when it was published, not when it happened.

What it is

From the CVE record

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.

In plain language

No plain-language summary for this CVE yet.

Exploitation

Where each signal puts this CVE on the scale from published to confirmed exploited.

EPSS14th
CISA KEV

Not in the catalog. CISA has not confirmed exploitation.

Public exploits

No public exploit or proof of concept found in the sources we track.

EPSS

0.2% chance of exploitation activity in the next 30 days, which ranks it in the 14th percentile of scored CVEs.

Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.

Lifecycle

6 events over 25 days, from the signal feeds we watch.

  1. Record updated
  2. Record updated
  3. OpenVAS check added
  4. Record updated
  5. Publishedrecord updated

Affected products

Sources

References in the record

And 3 more references. See all after sign-in

In the news

Watch the software you run.

My Stack ranks new CVEs for your products by real-world exploitation, so the next serious one reaches you without reading every advisory.

We'll flag the next CVE, public exploit or patch for Linux, not every advisory.