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GHSA-QGWV-QGMF-MMF4

Vulnerability from github – Published: 2024-05-21 18:31 – Updated: 2025-09-23 21:30

Details

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

powerpc/64s/interrupt: Fix interrupt exit race with security mitigation switch

The RFI and STF security mitigation options can flip the interrupt_exit_not_reentrant static branch condition concurrently with the interrupt exit code which tests that branch.

Interrupt exit tests this condition to set MSR[EE|RI] for exit, then again in the case a soft-masked interrupt is found pending, to recover the MSR so the interrupt can be replayed before attempting to exit again. If the condition changes between these two tests, the MSR and irq soft-mask state will become corrupted, leading to warnings and possible crashes. For example, if the branch is initially true then false, MSR[EE] will be 0 but PACA_IRQ_HARD_DIS clear and EE may not get enabled, leading to warnings in irq_64.c.

Severity

4.7 (Medium)


                  
                    CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2023-52740"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-362"
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    "github_reviewed": false,
    "github_reviewed_at": null,
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    "severity": "MODERATE"
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  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/64s/interrupt: Fix interrupt exit race with security mitigation switch\n\nThe RFI and STF security mitigation options can flip the\ninterrupt_exit_not_reentrant static branch condition concurrently with\nthe interrupt exit code which tests that branch.\n\nInterrupt exit tests this condition to set MSR[EE|RI] for exit, then\nagain in the case a soft-masked interrupt is found pending, to recover\nthe MSR so the interrupt can be replayed before attempting to exit\nagain. If the condition changes between these two tests, the MSR and irq\nsoft-mask state will become corrupted, leading to warnings and possible\ncrashes. For example, if the branch is initially true then false,\nMSR[EE] will be 0 but PACA_IRQ_HARD_DIS clear and EE may not get\nenabled, leading to warnings in irq_64.c.",
  "id": "GHSA-qgwv-qgmf-mmf4",
  "modified": "2025-09-23T21:30:53Z",
  "published": "2024-05-21T18:31:19Z",
  "references": [
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    },
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      "url": "https://git.kernel.org/stable/c/2ea31e2e62bbc4d11c411eeb36f1b02841dbcab1"
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}

CVE-2023-52740 (GCVE-0-2023-52740)

Vulnerability from cvelistv5 – Published: 2024-05-21 15:23 – Updated: 2026-05-11 19:32

Title

powerpc/64s/interrupt: Fix interrupt exit race with security mitigation switch

Summary

In the Linux kernel, the following vulnerability has been resolved: powerpc/64s/interrupt: Fix interrupt exit race with security mitigation switch The RFI and STF security mitigation options can flip the interrupt_exit_not_reentrant static branch condition concurrently with the interrupt exit code which tests that branch. Interrupt exit tests this condition to set MSR[EE|RI] for exit, then again in the case a soft-masked interrupt is found pending, to recover the MSR so the interrupt can be replayed before attempting to exit again. If the condition changes between these two tests, the MSR and irq soft-mask state will become corrupted, leading to warnings and possible crashes. For example, if the branch is initially true then false, MSR[EE] will be 0 but PACA_IRQ_HARD_DIS clear and EE may not get enabled, leading to warnings in irq_64.c.

Severity

No CVSS data available.

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

Assigner

Linux

References

3 references

URL	Tags
https://git.kernel.org/stable/c/86f7e423933608d53…
https://git.kernel.org/stable/c/6f097c24815e67909…
https://git.kernel.org/stable/c/2ea31e2e62bbc4d11…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 13799748b957bc5659f97c036224b0f4b42172e2 , < 86f7e423933608d536015a0f2eb9e0338c1227e0 (git) Affected: 13799748b957bc5659f97c036224b0f4b42172e2 , < 6f097c24815e67909a1fcc2c605586d02babd673 (git) Affected: 13799748b957bc5659f97c036224b0f4b42172e2 , < 2ea31e2e62bbc4d11c411eeb36f1b02841dbcab1 (git)
Linux	Linux	Affected: 5.14 Unaffected: 0 , < 5.14 (semver) Unaffected: 5.15.94 , ≤ 5.15.* (semver) Unaffected: 6.1.12 , ≤ 6.1.* (semver) Unaffected: 6.2 , ≤ * (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.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-QGWV-QGMF-MMF4

CVE-2023-52740 (GCVE-0-2023-52740)

Tags

Sightings

Nomenclature