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🛡️ CVE-2024-56583 — kernel

🟡 CVSS 5.5 — Medium ✅ No Known Exploit NVD
5.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

sched/deadline: Fix warning in migrate_enable for boosted tasks

In the Linux kernel, the following vulnerability has been resolved:

sched/deadline: Fix warning in migrate_enable for boosted tasks

When running the following command:

while true; do

stress-ng --cyclic 30 --timeout 30s --minimize --quiet

done

a warning is eventually triggered:

WARNING: CPU: 43 PID: 2848 at kernel/sched/deadline.c:794

setup_new_dl_entity+0x13e/0x180

...

Call Trace:

<TASK>

? show_trace_log_lvl+0x1c4/0x2df

? enqueue_dl_entity+0x631/0x6e0

? setup_new_dl_entity+0x13e/0x180

? __warn+0x7e/0xd0

? report_bug+0x11a/0x1a0

? handle_bug+0x3c/0x70

? exc_invalid_op+0x14/0x70

? asm_exc_invalid_op+0x16/0x20

enqueue_dl_entity+0x631/0x6e0

enqueue_task_dl+0x7d/0x120

__do_set_cpus_allowed+0xe3/0x280

__set_cpus_allowed_ptr_locked+0x140/0x1d0

__set_cpus_allowed_ptr+0x54/0xa0

migrate_enable+0x7e/0x150

rt_spin_unlock+0x1c/0x90

group_send_sig_info+0xf7/0x1a0

? kill_pid_info+0x1f/0x1d0

kill_pid_info+0x78/0x1d0

kill_proc_info+0x5b/0x110

__x64_sys_kill+0x93/0xc0

do_syscall_64+0x5c/0xf0

entry_SYSCALL_64_after_hwframe+0x6e/0x76

RIP: 0033:0x7f0dab31f92b

This warning occurs because set_cpus_allowed dequeues and enqueues tasks

with the ENQUEUE_RESTORE flag set. If the task is boosted, the warning

is triggered. A boosted task already had its parameters set by

rt_mutex_setprio, and a new call to setup_new_dl_entity is unnecessary,

hence the WARN_ON call.

Check if we are requeueing a boosted task and avoid calling

setup_new_dl_entity if that's the case.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability high.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

  • Attack vector: Local — a local account, shell or session on the host is needed.
  • Attack complexity: Low — the attack works reliably, with no preparation.
  • Privileges required: Low — an ordinary user account is enough.
  • User interaction: None — nobody has to be tricked into anything.
  • Scope: Unchanged — the damage stays inside the vulnerable component.
  • Confidentiality impact: None.
  • Integrity impact: None.
  • Availability impact: High — total loss, or loss the attacker controls.

Affected software

CVE-2024-56583 is recorded against 2 packages.

  • kernel (from 6.7.0 up to 6.12.5)
  • linux-kernel

Timeline and source

Published on 27 December 2024 and last revised on 12 August 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
github.com (Advisory)
nvd.nist.gov (Advisory)
git.kernel.org (Package)

Other advisories for this package

kernel has other advisories on record. If you are patching this one, these are worth checking on the same host:

Details

Severity Medium
CVSS Score 5.5
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE N/A
Public Exploit ✅ No
Source NVD
Published 2024-12-27
Updated 2026-08-20
Modified 2026-08-12

Affected Packages

Software From version Fixed in
kernel 6.7.0 6.12.5
linux-kernel — —

Similar Threats

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