Improper Check for Unusual or Exceptional Conditions Affecting kernel-uek-debug-core package, versions <0:5.15.0-303.171.5.2.el8uek


Severity

Recommended
high

Based on Oracle Linux security rating.

Threat Intelligence

EPSS
0.05% (18th percentile)

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  • Snyk IDSNYK-ORACLE8-KERNELUEKDEBUGCORE-8537725
  • published20 Dec 2024
  • disclosed8 Nov 2024

Introduced: 8 Nov 2024

CVE-2024-50196  (opens in a new tab)
CWE-754  (opens in a new tab)

How to fix?

Upgrade Oracle:8 kernel-uek-debug-core to version 0:5.15.0-303.171.5.2.el8uek or higher.
This issue was patched in ELSA-2024-12887.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-uek-debug-core package and not the kernel-uek-debug-core package as distributed by Oracle. See How to fix? for Oracle:8 relevant fixed versions and status.

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 &lt; info-&gt;stride; i++) {
    uregmap_read(info-&gt;map, id_reg + 4 * i, &amp;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 Scores

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