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Vulnerabilities CVE-2026-63797

CVE-2026-63797

None
Open
TLP:CLEAR

rpmsg: char: Fix use-after-free on probe error path

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Description

In the Linux kernel, the following vulnerability has been resolved: rpmsg: char: Fix use-after-free on probe error path rpmsg_chrdev_probe() stores the newly allocated eptdev in the default endpoint's priv pointer before calling rpmsg_chrdev_eptdev_add(). If rpmsg_chrdev_eptdev_add() then fails, its error path frees eptdev while the default endpoint may still dispatch callbacks with the stale priv pointer. Avoid publishing eptdev through the default endpoint until rpmsg_chrdev_eptdev_add() succeeds. Messages received before the priv pointer is published should be ignored by rpmsg_ept_cb(). Flow-control updates can hit rpmsg_ept_flow_cb() in the same window, so make both callbacks return success when priv is NULL.

Details

EPSS Score
0.15%

4.3th percentile

Confidence
90%
Published
Jul 19, 2026
Last Modified
Jul 19, 2026
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