CVE-2021-47429
published 2024-05-21CVE-2021-47429: In the Linux kernel, the following vulnerability has been resolved: powerpc/64s: Fix unrecoverable MCE calling async handler from NMI The machine check handler…
PriorityP419medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.19%
9.3th percentile
In the Linux kernel, the following vulnerability has been resolved:
powerpc/64s: Fix unrecoverable MCE calling async handler from NMI
The machine check handler is not considered NMI on 64s. The early
handler is the true NMI handler, and then it schedules the
machine_check_exception handler to run when interrupts are enabled.
This works fine except the case of an unrecoverable MCE, where the true
NMI is taken when MSR[RI] is clear, it can not recover, so it calls
machine_check_exception directly so something might be done about it.
Calling an async handler from NMI context can result in irq state and
other things getting corrupted. This can also trigger the BUG at
arch/powerpc/include/asm/interrupt.h:168
BUG_ON(!arch_irq_disabled_regs(regs) && !(regs->msr & MSR_EE));
Fix this by making an _async version of the handler which is called
in the normal case, and a NMI version that is called for unrecoverable
interrupts.
Affected
9 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 5.14.12-1 (bookworm) | linux 5.14.12-1 (bookworm) |
| linux | linux | — | — |
| linux | linux | >= 2b43dd7653cca47d297756980846ebbfe8887fa1 < d7a8e38999fbd6910516e44cb43f9f4317e54f73 | d7a8e38999fbd6910516e44cb43f9f4317e54f73 |
| linux | linux | >= 2b43dd7653cca47d297756980846ebbfe8887fa1 < f08fb25bc66986b0952724530a640d9970fa52c1 | f08fb25bc66986b0952724530a640d9970fa52c1 |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 0 < 5.14.12-1 | 5.14.12-1 |
| linux | linux_kernel | >= 0 < 5.14.12-1 | 5.14.12-1 |
| linux | linux_kernel | >= 0 < 5.14.12-1 | 5.14.12-1 |
| linux | linux_kernel | >= 5.14 < 5.14.12 | 5.14.12 |
CVSS provenance
nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv5.5MEDIUM
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
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Red Hat
kernel: powerpc/64s: Fix unrecoverable MCE calling async handler from NMI
vendor_redhat·2024-05-21·CVSS 5.5
CVE-2021-47429 [MEDIUM] CWE-99 kernel: powerpc/64s: Fix unrecoverable MCE calling async handler from NMI
kernel: powerpc/64s: Fix unrecoverable MCE calling async handler from NMI
In the Linux kernel, the following vulnerability has been resolved:
powerpc/64s: Fix unrecoverable MCE calling async handler from NMI
The machine check handler is not considered NMI on 64s. The early
handler is the true NMI handler, and then it schedules the
machine_check_exception handler to run when interrupts are enabled.
This works fine except the case of an unrecoverable MCE, where the true
NMI is taken when MSR[RI] is clear, it can not recover, so it calls
machine_check_exception directly so something might be done about it.
Calling an async handler from NMI context can result in irq state and
other things getting corrupted. This can also trigger the BUG at
arch/powerpc/include/asm/interrupt.h:168
BUG_ON(!arch
Debian
CVE-2021-47429: linux - In the Linux kernel, the following vulnerability has been resolved: powerpc/64s...
vendor_debian·2021·CVSS 5.5
CVE-2021-47429 [MEDIUM] CVE-2021-47429: linux - In the Linux kernel, the following vulnerability has been resolved: powerpc/64s...
In the Linux kernel, the following vulnerability has been resolved: powerpc/64s: Fix unrecoverable MCE calling async handler from NMI The machine check handler is not considered NMI on 64s. The early handler is the true NMI handler, and then it schedules the machine_check_exception handler to run when interrupts are enabled. This works fine except the case of an unrecoverable MCE, where the true NMI is taken when MSR[RI] is clear, it can not recover, so it calls machine_check_exception directly so something might be done about it. Calling an async handler from NMI context can result in irq state and other things getting corrupted. This can also trigger the BUG at arch/powerpc/include/asm/interrupt.h:168 BUG_ON(!arch_irq_disabled_regs(regs) && !(regs->msr & MSR_EE)); Fix this by making an _
GHSA
GHSA-g8c8-mwvp-jcrr: In the Linux kernel, the following vulnerability has been resolved:
powerpc/64s: Fix unrecoverable MCE calling async handler from NMI
The machine ch
ghsa_unreviewed·2024-05-21
CVE-2021-47429 [MEDIUM] GHSA-g8c8-mwvp-jcrr: In the Linux kernel, the following vulnerability has been resolved:
powerpc/64s: Fix unrecoverable MCE calling async handler from NMI
The machine ch
In the Linux kernel, the following vulnerability has been resolved:
powerpc/64s: Fix unrecoverable MCE calling async handler from NMI
The machine check handler is not considered NMI on 64s. The early
handler is the true NMI handler, and then it schedules the
machine_check_exception handler to run when interrupts are enabled.
This works fine except the case of an unrecoverable MCE, where the true
NMI is taken when MSR[RI] is clear, it can not recover, so it calls
machine_check_exception directly so something might be done about it.
Calling an async handler from NMI context can result in irq state and
other things getting corrupted. This can also trigger the BUG at
arch/powerpc/include/asm/interrupt.h:168
BUG_ON(!arch_irq_disabled_regs(regs) && !(regs->msr & MSR_EE));
Fix this by making
OSV
CVE-2021-47429: In the Linux kernel, the following vulnerability has been resolved: powerpc/64s: Fix unrecoverable MCE calling async handler from NMI The machine chec
osv·2024-05-21·CVSS 5.5
CVE-2021-47429 [MEDIUM] CVE-2021-47429: In the Linux kernel, the following vulnerability has been resolved: powerpc/64s: Fix unrecoverable MCE calling async handler from NMI The machine chec
In the Linux kernel, the following vulnerability has been resolved: powerpc/64s: Fix unrecoverable MCE calling async handler from NMI The machine check handler is not considered NMI on 64s. The early handler is the true NMI handler, and then it schedules the machine_check_exception handler to run when interrupts are enabled. This works fine except the case of an unrecoverable MCE, where the true NMI is taken when MSR[RI] is clear, it can not recover, so it calls machine_check_exception directly so something might be done about it. Calling an async handler from NMI context can result in irq state and other things getting corrupted. This can also trigger the BUG at arch/powerpc/include/asm/interrupt.h:168 BUG_ON(!arch_irq_disabled_regs(regs) && !(regs->msr & MSR_EE)); Fix this by making an _
No detection rules found.
No public exploits indexed.
2024-05-21
Published