CVE-2024-50196

MEDIUM EPSS 10.8%
Published Nov 8, 20241y ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Nov 8, 2024 1y ago
Last Modified Jun 17, 2026 2w ago

Description

In the Linux kernel, the following vulnerability has been resolved: pinctrl: ocelot: fix system hang on level based interrupts The current implementation only calls chained_irq_enter() and chained_irq_exit() if it detects pending interrupts. ``` for (i = 0; i < info->stride; i++) { uregmap_read(info->map, id_reg + 4 * i, &reg); if (!reg) continue; chained_irq_enter(parent_chip, desc); ``` However, in case of GPIO pin configured in level mode and the parent controller configured in edge mode, GPIO interrupt might be lowered by the hardware. In the result, if the interrupt is short enough, the parent interrupt is still pending while the GPIO interrupt is cleared; chained_irq_enter() never gets called and the system hangs trying to service the parent interrupt. Moving chained_irq_enter() and chained_irq_exit() outside the for loop ensures that they are called even when GPIO interrupt is lowered by the hardware. The similar code with chained_irq_enter() / chained_irq_exit() functions wrapping interrupt checking loop may be found in many other drivers: ``` grep -r -A 10 chained_irq_enter drivers/pinctrl ```

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
10.8% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-754

Affected Products 7

VendorProductVersionRange
linuxlinux_kernel* <5.15.169
linuxlinux_kernel*≥5.16  –  <6.1.114
linuxlinux_kernel*≥6.2  –  <6.6.58
linuxlinux_kernel*≥6.7  –  <6.11.5
linuxlinux_kernel6.12any
linuxlinux_kernel6.12any
linuxlinux_kernel6.12any

References 6

  • git.kernel.org https://git.kernel.org/stable/c/20728e86289ab463b99b7ab4425515bd26aba417
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/4a81800ef05bea5a9896f199677f7b7f5020776a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/655f5d4662b958122b260be05aa6dfdf8768efe6
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/93b8ddc54507a227087c60a0013ed833b6ae7d3c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/dcbe9954634807ec54e22bde278b5b269f921381
    Patch
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/20728e86289ab463b99b7ab4425515bd26aba417
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/4a81800ef05bea5a9896f199677f7b7f5020776a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/655f5d4662b958122b260be05aa6dfdf8768efe6
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/93b8ddc54507a227087c60a0013ed833b6ae7d3c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/dcbe9954634807ec54e22bde278b5b269f921381
    Patch