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EUVD-2026-312892

European Vulnerability Database identifier assigned by ENISA

Reserved

2026-10-02 07:25

Assigner

ENISA

Alias of

a CVE record, shown under related vulnerabilities. This identifier carries no description, severity or references of its own: they belong to that CVE.

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{
  "assigner": "ENISA",
  "date_reserved": "2026-10-02T07:25:27.239673+00:00",
  "id": "EUVD-2026-312892"
}

CVE-2024-38613 (GCVE-0-2024-38613)

Vulnerability from cvelistv5 – Published: 2024-06-19 13:56 – Updated: 2026-05-11 20:20

Title

m68k: Fix spinlock race in kernel thread creation

Summary

In the Linux kernel, the following vulnerability has been resolved: m68k: Fix spinlock race in kernel thread creation Context switching does take care to retain the correct lock owner across the switch from 'prev' to 'next' tasks. This does rely on interrupts remaining disabled for the entire duration of the switch. This condition is guaranteed for normal process creation and context switching between already running processes, because both 'prev' and 'next' already have interrupts disabled in their saved copies of the status register. The situation is different for newly created kernel threads. The status register is set to PS_S in copy_thread(), which does leave the IPL at 0. Upon restoring the 'next' thread's status register in switch_to() aka resume(), interrupts then become enabled prematurely. resume() then returns via ret_from_kernel_thread() and schedule_tail() where run queue lock is released (see finish_task_switch() and finish_lock_switch()). A timer interrupt calling scheduler_tick() before the lock is released in finish_task_switch() will find the lock already taken, with the current task as lock owner. This causes a spinlock recursion warning as reported by Guenter Roeck. As far as I can ascertain, this race has been opened in commit 533e6903bea0 ("m68k: split ret_from_fork(), simplify kernel_thread()") but I haven't done a detailed study of kernel history so it may well predate that commit. Interrupts cannot be disabled in the saved status register copy for kernel threads (init will complain about interrupts disabled when finally starting user space). Disable interrupts temporarily when switching the tasks' register sets in resume(). Note that a simple oriw 0x700,%sr after restoring sr is not enough here - this leaves enough of a race for the 'spinlock recursion' warning to still be observed. Tested on ARAnyM and qemu (Quadra 800 emulation).

Severity

No CVSS data available.

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-09-10 17:13 UTC

Assigner

Linux mitre root Scorecard

References

9 references

URL	Tags
https://git.kernel.org/stable/c/2a8d1d95302c7d52c…
https://git.kernel.org/stable/c/5213cc01d0464c011…
https://git.kernel.org/stable/c/4eeffecc8e3cce25b…
https://git.kernel.org/stable/c/77b2b67a0f8bce260…
https://git.kernel.org/stable/c/0d9ae1253535f6e85…
https://git.kernel.org/stable/c/f3baf0f4f92af3294…
https://git.kernel.org/stable/c/f1d4274a84c069be0…
https://git.kernel.org/stable/c/95f00caf767b5968c…
https://git.kernel.org/stable/c/da89ce46f02470ef0…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 533e6903bea0440816a0f517b0845ccea4cc7917 , < 2a8d1d95302c7d52c6ac8fa5cb4a6948ae0d3a14 (git) Affected: 533e6903bea0440816a0f517b0845ccea4cc7917 , < 5213cc01d0464c011fdc09f318705603ed3a746b (git) Affected: 533e6903bea0440816a0f517b0845ccea4cc7917 , < 4eeffecc8e3cce25bb559502c2fd94a948bcde82 (git) Affected: 533e6903bea0440816a0f517b0845ccea4cc7917 , < 77b2b67a0f8bce260c53907e5749d61466d90c87 (git) Affected: 533e6903bea0440816a0f517b0845ccea4cc7917 , < 0d9ae1253535f6e85a016e09c25ecbe6f7f59ef0 (git) Affected: 533e6903bea0440816a0f517b0845ccea4cc7917 , < f3baf0f4f92af32943ebf27b960e0552c6c082fd (git) Affected: 533e6903bea0440816a0f517b0845ccea4cc7917 , < f1d4274a84c069be0f6098ab10c3443fc1f7134c (git) Affected: 533e6903bea0440816a0f517b0845ccea4cc7917 , < 95f00caf767b5968c2c51083957b38be4748a78a (git) Affected: 533e6903bea0440816a0f517b0845ccea4cc7917 , < da89ce46f02470ef08f0f580755d14d547da59ed (git)
Linux	Linux	Affected: 3.7 Unaffected: 0 , < 3.7 (semver) Unaffected: 4.19.316 , ≤ 4.19.* (semver) Unaffected: 5.4.278 , ≤ 5.4.* (semver) Unaffected: 5.10.219 , ≤ 5.10.* (semver) Unaffected: 5.15.161 , ≤ 5.15.* (semver) Unaffected: 6.1.93 , ≤ 6.1.* (semver) Unaffected: 6.6.33 , ≤ 6.6.* (semver) Unaffected: 6.8.12 , ≤ 6.8.* (semver) Unaffected: 6.9.3 , ≤ 6.9.* (semver) Unaffected: 6.10 , ≤ * (original_commit_for_fix)

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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EUVD-2026-312892

CVE-2024-38613 (GCVE-0-2024-38613)

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