Bug 2493775 (CVE-2026-53297)

Summary: CVE-2026-53297 kernel: net: mana: Guard mana_remove against double invocation
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
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Priority: low    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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Doc Text:
A flaw was found in the Linux kernel's mana network driver. This vulnerability occurs when the `mana_remove` function is invoked a second time without proper checks after a power management (PM) resume failure and subsequent driver unbinding. A local attacker could exploit this double invocation to cause a kernel panic, leading to a Denial of Service (DoS) on the system.
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Description OSIDB Bzimport 2026-06-26 21:06:55 UTC 
In the Linux kernel, the following vulnerability has been resolved:

net: mana: Guard mana_remove against double invocation

If PM resume fails (e.g., mana_attach() returns an error), mana_probe()
calls mana_remove(), which tears down the device and sets
gd->gdma_context = NULL and gd->driver_data = NULL.

However, a failed resume callback does not automatically unbind the
driver. When the device is eventually unbound, mana_remove() is invoked
a second time. Without a NULL check, it dereferences gc->dev with
gc == NULL, causing a kernel panic.

Add an early return if gdma_context or driver_data is NULL so the second
invocation is harmless. Move the dev = gc->dev assignment after the
guard so it cannot dereference NULL.
Comment 1 Mauro Matteo Cascella 2026-06-29 07:59:40 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026062618-CVE-2026-53297-ccbc@gregkh/T