CVE-2024-42140
riscv: kexec: Avoid deadlock in kexec crash path
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Description
In the Linux kernel, the following vulnerability has been resolved: riscv: kexec: Avoid deadlock in kexec crash path If the kexec crash code is called in the interrupt context, the machine_kexec_mask_interrupts() function will trigger a deadlock while trying to acquire the irqdesc spinlock and then deactivate irqchip in irq_set_irqchip_state() function. Unlike arm64, riscv only requires irq_eoi handler to complete EOI and keeping irq_set_irqchip_state() will only leave this possible deadlock without any use. So we simply remove it.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
- https://git.kernel.org/stable/c/484dd545271d02d1571e1c6b62ea7df9dbe5e692
- https://git.kernel.org/stable/c/653deee48a4682ea17a05b96fb6842795ab5943c
- https://git.kernel.org/stable/c/7692c9b6baacdee378435f58f19baf0eb69e4155
- https://git.kernel.org/stable/c/bb80a7911218bbab2a69b5db7d2545643ab0073d
- https://git.kernel.org/stable/c/c562ba719df570c986caf0941fea2449150bcbc4
References (6)
SSVC — Action Prioritization
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
- Attack Vector
- LOCAL
- Complexity
- LOW
- Privileges
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- NONE
- Availability
- HIGH
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