Bug 2347989 (CVE-2022-49074) - CVE-2022-49074 kernel: irqchip/gic-v3: Fix GICR_CTLR.RWP polling
Summary: CVE-2022-49074 kernel: irqchip/gic-v3: Fix GICR_CTLR.RWP polling
Keywords:
Status: NEW
Alias: CVE-2022-49074
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2025-02-26 03:13 UTC by OSIDB Bzimport
Modified: 2025-05-02 15:26 UTC (History)
4 users (show)

Fixed In Version:
Clone Of:
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Description OSIDB Bzimport 2025-02-26 03:13:45 UTC 
In the Linux kernel, the following vulnerability has been resolved:

irqchip/gic-v3: Fix GICR_CTLR.RWP polling

It turns out that our polling of RWP is totally wrong when checking
for it in the redistributors, as we test the *distributor* bit index,
whereas it is a different bit number in the RDs... Oopsie boo.

This is embarassing. Not only because it is wrong, but also because
it took *8 years* to notice the blunder...

Just fix the damn thing.
Comment 1 Avinash Hanwate 2025-02-26 20:19:39 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025022655-CVE-2022-49074-a7c9@gregkh/T
Comment 4 Avinash Hanwate 2025-02-27 22:15:48 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025022655-CVE-2022-49074-a7c9@gregkh/T
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