CVE-2023-52740
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…
Does this matter?
Lower severity and a low EPSS score (0.18%). Track it; it rarely justifies an emergency change on its own.
Description
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.
- CVSS 3.1
- 4.7 MEDIUMCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.18% probability · 8th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-362
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/2ea31e2e62bbc4d11c411eeb36f1b02841dbcab1Patch
- https://git.kernel.org/stable/c/6f097c24815e67909a1fcc2c605586d02babd673Patch
- https://git.kernel.org/stable/c/86f7e423933608d536015a0f2eb9e0338c1227e0Patch
- https://git.kernel.org/stable/c/2ea31e2e62bbc4d11c411eeb36f1b02841dbcab1Patch
- https://git.kernel.org/stable/c/6f097c24815e67909a1fcc2c605586d02babd673Patch
- https://git.kernel.org/stable/c/86f7e423933608d536015a0f2eb9e0338c1227e0Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.