Review reviewHigh

CVE-2026-64374

Linux

In the Linux kernel, the following vulnerability has been resolved: sched/rt: Have RT_PUSH_IPI be default off for non PREEMPT_RT RT migration is done aggressively. When a CPU schedules out a high priority RT task for a lower priority task, it will look to see if there's any RT tasks that are waiting to run on another CPU that is of higher priority than the task this CPU is about to run. If it finds one, it will pull that task over to the CPU and allow it to run there instead. Normally, this pulling is done by looking at the RT overloaded mask (rto) which contains all the CPUs in the schedul...

CVSS
7.5
EPSS
-
- percentile
CISA KEV
Not listed
Published
2026.07.25
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability-
Technical severityCVSS 7.5

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: sched/rt: Have RT_PUSH_IPI be default off for non PREEMPT_RT RT migration is done aggressively. When a CPU schedules out a high priority RT task for a lower priority task, it will look to see if there's any RT tasks that are waiting to run on another CPU that is of higher priority than the task this CPU is about to run. If it finds one, it will pull that task over to the CPU and allow it to run there instead. Normally, this pulling is done by looking at the RT overloaded mask (rto) which contains all the CPUs in the schedul...

Affected product and versions

Product
Linux
Affected versions
>= b6366f048e0caff28af5335b7af2031266e1b06b < b99f04ae3d200d2f8844aa29145bd18eccbeecde, >= b6366f048e0caff28af5335b7af2031266e1b06b < d8312a56d9a162e3ec76476aa487e7d20bc602e9, >= b6366f048e0caff28af5335b7af2031266e1b06b < 44aae426dbfd51286f7eb601cfa14bc32164812a, >= b6366f048e0caff28af5335b7af2031266e1b06b < 860aaff72c8446fed5e576249e19952883a18885, >= b6366f048e0caff28af5335b7af2031266e1b06b < 89237c8fc15d8016a194076e648ccb57d75e65ae, >= b6366f048e0caff28af5335b7af2031266e1b06b < 4bd0da48fbc1dbef6774175129107fbbdd353e26, >= b6366f048e0caff28af5335b7af2031266e1b06b < a18f80bf5359238c4f067d691b96af00286fdd89, >= b6366f048e0caff28af5335b7af2031266e1b06b < dd29c017aed628076e915fe4cdfb5392fd4c5cab, >= 4.1
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
Not available
CVE-2026-64374 — Linux | SECUFOCUS NOW