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rpmsg: core: fix race in driver_override_show() and use core helper

Type: advisorySource: Official CVE List1 source record

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.

Announced Source revision 1
Original source ↗

CVE-2025-71274

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2025-71274

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "39e47767ec9b22f844c2a07c9d329256960d4021",
        "lessThan": "392c6b68334aa0e0ae9aba95c0a366bcb0d92f5d",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "39e47767ec9b22f844c2a07c9d329256960d4021",
        "lessThan": "d66b8074c555e8abb0ae19eea1c9f3635498bdde",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "39e47767ec9b22f844c2a07c9d329256960d4021",
        "lessThan": "47615557447185917afa432b7958f87583c417cb",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "39e47767ec9b22f844c2a07c9d329256960d4021",
        "lessThan": "90c8353f471821d7ccd4fe573a2402e056192494",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "39e47767ec9b22f844c2a07c9d329256960d4021",
        "lessThan": "7654e6e3cd6bdee9602f6063b3c670bd556d7e61",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "39e47767ec9b22f844c2a07c9d329256960d4021",
        "lessThan": "2e4a70f3c30910427e5ea848b799066d67b963d5",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "39e47767ec9b22f844c2a07c9d329256960d4021",
        "lessThan": "954557957177c3c13d7c655976665b1170da5e50",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "39e47767ec9b22f844c2a07c9d329256960d4021",
        "lessThan": "42023d4b6d2661a40ee2dcf7e1a3528a35c638ca",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/rpmsg/rpmsg_core.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "4.18"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "4.18",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.252",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.202",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.165",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.128",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.75",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.16",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "6.19.6",
        "versionType": "semver",
        "lessThanOrEqual": "6.19.*"
      },
      {
        "status": "unaffected",
        "version": "7.0",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/rpmsg/rpmsg_core.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2025-71274

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#39678 · Revision 1
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Publisher date
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