CVE-2025-71274 (GCVE-0-2025-71274)

Vulnerability from cvelistv5 – Published: 2026-05-06 11:27 – Updated: 2026-05-06 11:27
VLAI?
Title
rpmsg: core: fix race in driver_override_show() and use core helper
Summary
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 39e47767ec9b22f844c2a07c9d329256960d4021 , < 392c6b68334aa0e0ae9aba95c0a366bcb0d92f5d (git)
Affected: 39e47767ec9b22f844c2a07c9d329256960d4021 , < d66b8074c555e8abb0ae19eea1c9f3635498bdde (git)
Affected: 39e47767ec9b22f844c2a07c9d329256960d4021 , < 47615557447185917afa432b7958f87583c417cb (git)
Affected: 39e47767ec9b22f844c2a07c9d329256960d4021 , < 90c8353f471821d7ccd4fe573a2402e056192494 (git)
Affected: 39e47767ec9b22f844c2a07c9d329256960d4021 , < 7654e6e3cd6bdee9602f6063b3c670bd556d7e61 (git)
Affected: 39e47767ec9b22f844c2a07c9d329256960d4021 , < 2e4a70f3c30910427e5ea848b799066d67b963d5 (git)
Affected: 39e47767ec9b22f844c2a07c9d329256960d4021 , < 954557957177c3c13d7c655976665b1170da5e50 (git)
Affected: 39e47767ec9b22f844c2a07c9d329256960d4021 , < 42023d4b6d2661a40ee2dcf7e1a3528a35c638ca (git)
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    Linux Linux Affected: 4.18
Unaffected: 0 , < 4.18 (semver)
Unaffected: 5.10.252 , ≤ 5.10.* (semver)
Unaffected: 5.15.202 , ≤ 5.15.* (semver)
Unaffected: 6.1.165 , ≤ 6.1.* (semver)
Unaffected: 6.6.128 , ≤ 6.6.* (semver)
Unaffected: 6.12.75 , ≤ 6.12.* (semver)
Unaffected: 6.18.16 , ≤ 6.18.* (semver)
Unaffected: 6.19.6 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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{
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          "product": "Linux",
          "programFiles": [
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrpmsg: core: fix race in driver_override_show() and use core helper\n\nThe driver_override_show function reads the driver_override string\nwithout holding the device_lock. However, the store function modifies\nand frees the string while holding the device_lock. This creates a race\ncondition where the string can be freed by the store function while\nbeing read by the show function, leading to a use-after-free.\n\nTo fix this, replace the rpmsg_string_attr macro with explicit show and\nstore functions. The new driver_override_store uses the standard\ndriver_set_override helper. Since the introduction of\ndriver_set_override, the comments in include/linux/rpmsg.h have stated\nthat this helper must be used to set or clear driver_override, but the\nimplementation was not updated until now.\n\nBecause driver_set_override modifies and frees the string while holding\nthe device_lock, the new driver_override_show now correctly holds the\ndevice_lock during the read operation to prevent the race.\n\nAdditionally, since rpmsg_string_attr has only ever been used for\ndriver_override, removing the macro simplifies the code."
        }
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      "providerMetadata": {
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        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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    "dateReserved": "2026-03-17T09:08:18.458Z",
    "dateUpdated": "2026-05-06T11:27:07.525Z",
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  }
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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