{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-31688", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-03-09T15:48:24.131Z", "datePublished": "2026-04-27T17:32:37.892Z", "dateUpdated": "2026-04-27T17:32:37.892Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-04-27T17:32:37.892Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndriver core: enforce device_lock for driver_match_device()\n\nCurrently, driver_match_device() is called from three sites. One site\n(__device_attach_driver) holds device_lock(dev), but the other two\n(bind_store and __driver_attach) do not. This inconsistency means that\nbus match() callbacks are not guaranteed to be called with the lock\nheld.\n\nFix this by introducing driver_match_device_locked(), which guarantees\nholding the device lock using a scoped guard. Replace the unlocked calls\nin bind_store() and __driver_attach() with this new helper. Also add a\nlock assertion to driver_match_device() to enforce this guarantee.\n\nThis consistency also fixes a known race condition. The driver_override\nimplementation relies on the device_lock, so the missing lock led to the\nuse-after-free (UAF) reported in Bugzilla for buses using this field.\n\nStress testing the two newly locked paths for 24 hours with\nCONFIG_PROVE_LOCKING and CONFIG_LOCKDEP enabled showed no UAF recurrence\nand no lockdep warnings."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/base/base.h", "drivers/base/bus.c", "drivers/base/dd.c"], "versions": [{"version": "49b420a13ff95b449947181190b08367348e3e1b", "lessThan": "dc23806a7c47ec5f1293aba407fb69519f976ee0", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/base/base.h", "drivers/base/bus.c", "drivers/base/dd.c"], "versions": [{"version": "2.6.30", "status": "affected"}, {"version": "0", "lessThan": "2.6.30", "status": "unaffected", "versionType": "semver"}, {"version": "7.0", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.30", "versionEndExcluding": "7.0"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/dc23806a7c47ec5f1293aba407fb69519f976ee0"}], "title": "driver core: enforce device_lock for driver_match_device()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndriver core: enforce device_lock for driver_match_device()\n\nCurrently, driver_match_device() is called from three sites. One site\n(__device_attach_driver) holds device_lock(dev), but the other two\n(bind_store and __driver_attach) do not. This inconsistency means that\nbus match() callbacks are not guaranteed to be called with the lock\nheld.\n\nFix this by introducing driver_match_device_locked(), which guarantees\nholding the device lock using a scoped guard. Replace the unlocked calls\nin bind_store() and __driver_attach() with this new helper. Also add a\nlock assertion to driver_match_device() to enforce this guarantee.\n\nThis consistency also fixes a known race condition. The driver_override\nimplementation relies on the device_lock, so the missing lock led to the\nuse-after-free (UAF) reported in Bugzilla for buses using this field.\n\nStress testing the two newly locked paths for 24 hours with\nCONFIG_PROVE_LOCKING and CONFIG_LOCKDEP enabled showed no UAF recurrence\nand no lockdep warnings."}], "id": "CVE-2026-31688", "lastModified": "2026-04-27T18:32:22.917", "metrics": {}, "published": "2026-04-27T18:16:54.287", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/dc23806a7c47ec5f1293aba407fb69519f976ee0"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{}

{}