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Azure kernel 6.6.157.1-1 may disable device clocks
published 12 days ago
Summary
The Azure Linux kernel version 6.6.157.1-1 can incorrectly turn off power‑control clocks when a storage device is removed, potentially leaving the device in a non‑functional state. This happens because the shutdown routine does not properly undo a power‑saving setting that was enabled when the device started. Updating to a kernel that includes the fix or applying the provided patch will prevent the issue.
What to do
The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.
Affected software
| Ecosystem | Vendor | Product | Affected versions |
|---|---|---|---|
| Azure Linux:3 | azure | kernel | <= 6.6.157.1-1 |
Original advisory text
CVE-2026-99034 affecting package kernel 6.6.157.1-1
In the Linux kernel, the following vulnerability has been resolved:
mmc: sdhci-sprd: disable runtime PM on remove
sdhci_sprd_probe() enables runtime PM, while sdhci_sprd_remove() does
not perform the corresponding runtime PM cleanup.
The probe failure path disables runtime PM before disabling the clocks,
but the normal remove path directly disables clocks that are also
managed by the runtime PM callbacks. If the device is runtime
suspended, those clocks may already be disabled.
Resume the device before removal, disable runtime PM and drop the
temporary runtime PM reference before disabling the clocks.
This issue was found by manual code inspection.
mmc: sdhci-sprd: disable runtime PM on remove
sdhci_sprd_probe() enables runtime PM, while sdhci_sprd_remove() does
not perform the corresponding runtime PM cleanup.
The probe failure path disables runtime PM before disabling the clocks,
but the normal remove path directly disables clocks that are also
managed by the runtime PM callbacks. If the device is runtime
suspended, those clocks may already be disabled.
Resume the device before removal, disable runtime PM and drop the
temporary runtime PM reference before disabling the clocks.
This issue was found by manual code inspection.
References
Timeline
Published23 Oct 2026
Updated24 Oct 2026
First seen24 Oct 2026
Sources
AZL-110897 · OSV
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