Bug 2420291 (CVE-2022-50642)

Summary: CVE-2022-50642 kernel: platform/chrome: cros_ec_typec: zero out stale pointers
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Version: unspecifiedKeywords: Security
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OS: Linux   
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Description OSIDB Bzimport 2025-12-09 01:06:19 UTC 
In the Linux kernel, the following vulnerability has been resolved:

platform/chrome: cros_ec_typec: zero out stale pointers

`cros_typec_get_switch_handles` allocates four pointers when obtaining
type-c switch handles. These pointers are all freed if failing to obtain
any of them; therefore, pointers in `port` become stale. The stale
pointers eventually cause use-after-free or double free in later code
paths. Zeroing out all pointer fields after freeing to eliminate these
stale pointers.
Comment 1 Alexander B 2025-12-10 03:39:05 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025120936-CVE-2022-50642-6975@gregkh/T