rpmsg: core: fix race in driver_override_show() and use core helper
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.
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
- Added to Heist Feed
- Publisher date