CVE-2026-63797
Last modified
CVE-2026-63797 is a high-severity vulnerability rated 8.4/10 on the CVSS scale. 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. EPSS estimates a 0.14% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.18, < 6.1.178 |
| Linux | Linux Kernel | >= 6.2, < 6.6.144 |
| Linux | Linux Kernel | >= 6.7, < 6.12.95 |
| Linux | Linux Kernel | >= 6.13, < 6.18.38 |
| Linux | Linux Kernel | >= 6.19, < 7.1.3 |
References
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-63797?
How severe is CVE-2026-63797?
How do I fix CVE-2026-63797?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-6378The Maxi Blocks plugin for WordPress is vulnerable to Stored…6.4
- CVE-2026-6379The WP Photo Album Plus WordPress plugin before 9.1.11.001 d…8.6
- CVE-2026-63793In the Linux kernel, the following vulnerability has been re…7.8
- CVE-2026-63794In the Linux kernel, the following vulnerability has been re…7.8
- CVE-2026-63795In the Linux kernel, the following vulnerability has been re…10
- CVE-2026-63796In the Linux kernel, the following vulnerability has been re…8.8
- CVE-2026-63798In the Linux kernel, the following vulnerability has been re…5.5
- CVE-2026-63799In the Linux kernel, the following vulnerability has been re…7.8
- CVE-2026-63800In the Linux kernel, the following vulnerability has been re…9.8
- CVE-2026-63801In the Linux kernel, the following vulnerability has been re…8.8
- CVE-2026-63802In the Linux kernel, the following vulnerability has been re…7.8
- CVE-2026-63803In the Linux kernel, the following vulnerability has been re…7.8
Are you affected by CVE-2026-63797?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST