{"id":"CVE-2026-72314","revision":"0dbb7b9b2ab64c8a99fe8039396b4eff","records":[{"revision":"0dbb7b9b2ab64c8a99fe8039396b4eff","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-72314","aliases":[],"title":"regulator: core: regulator_lock_two() should test for EDEADLK not EDEADLOCK","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nregulator: core: regulator_lock_two() should test for EDEADLK not EDEADLOCK\n\nCompare against -EDEADLK, which is what ww_mutex_lock() actually\nreturns and what every other deadlock check in this file already uses.\n\nFunction regulator_lock_two() acquires two regulators via\nregulator_lock_nested() -> ww_mutex_lock().  On contention,\nww_mutex_lock() returns -EDEADLK, which is the caller's signal to drop\nthe lock it holds and retry the acquisition in the canonical order.\n\nHowever, regulator_lock_two() tests the return value against -EDEADLOCK\nrather than -EDEADLK.  On most architectures, EDEADLK and EDEADLOCK are\nthe same value, so the comparison happens to be correct and the bug is\ninvisible.  But on MIPS, SPARC, and PowerPC, those two errors have\ndifferent values.  The test is wrong: a genuine -EDEADLK backoff no\nlonger matches -EDEADLOCK, so instead of unlocking and retrying, the\ncode falls into WARN_ON(ret) and returns with only one of the two\nregulators locked.\n\nIn practice, this is a bug only on MIPS, because the regulator core is\nnot built or used on the other two platforms.\n\nIn general, EDEADLK is preferred over EDEADLOCK for new code.","state":0,"publishedAt":"2026-08-15T05:55:29.118+00:00","modifiedAt":"2026-10-16T18:55:16.999+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/regulator/core.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"06140d6dfe720d80566f792b4e28a9cd60a67970\",\n                            \"lessThan\": \"dc804f390fddd9c389edf0976356942e16878d8f\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1e3056b8067c2e9b7741c4e588f0acacbe4bdafc\",\n                            \"lessThan\": \"8e39aa63798ea0a797fd9341419f12ef91df3238\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"849ab4cf182b38e562ffcc1b494d510e948822dd\",\n                            \"lessThan\": \"0c305eac40470a224671858a215963b070f9b2a9\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"cba6cfdc7c3f1516f0d08ddfb24e689af0932573\",\n                            \"lessThan\": \"29a7953e9adea6c7f9e64947745b79158e7cea7f\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"cba6cfdc7c3f1516f0d08ddfb24e689af0932573\",\n                            \"lessThan\": \"e2063307ea3b6da74585129ba7b588e8243e2ef0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"cba6cfdc7c3f1516f0d08ddfb24e689af0932573\",\n                            \"lessThan\": \"346e2d666a29ae7233c56b356a0487eb1d42589b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"cba6cfdc7c3f1516f0d08ddfb24e689af0932573\",\n                            \"lessThan\": \"153d1b8b5bc30847eb70ad535f62f289aa9217e6\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"cba6cfdc7c3f1516f0d08ddfb24e689af0932573\",\n                            \"lessThan\": \"d38f8bd771c4999b797d7074b348cf201414bd34\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"5224ea575196db11c0a909a78ea426ccdb92f064\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"435c65af581a61ca249bd8f717c3a147dc119f11\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"cdc042430ea9e07f77ce05a9d29e227dbdecc733\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"5.10.180\",\n                            \"lessThan\": \"5.10.261\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.111\",\n                            \"lessThan\": \"5.15.212\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.28\",\n                            \"lessThan\": \"6.1.178\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.4.243\",\n                            \"lessThan\": \"5.5\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.2.15\",\n                            \"lessThan\": \"6.3\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.3.2\",\n                            \"lessThan\": \"6.4\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/regulator/core.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.4\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.4\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.261\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.212\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.178\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.145\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.97\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.40\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1.5\",\n                            \"lessThanOrEqual\": \"7.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/dc804f390fddd9c389edf0976356942e16878d8f","https://git.kernel.org/stable/c/8e39aa63798ea0a797fd9341419f12ef91df3238","https://git.kernel.org/stable/c/0c305eac40470a224671858a215963b070f9b2a9","https://git.kernel.org/stable/c/29a7953e9adea6c7f9e64947745b79158e7cea7f","https://git.kernel.org/stable/c/e2063307ea3b6da74585129ba7b588e8243e2ef0","https://git.kernel.org/stable/c/346e2d666a29ae7233c56b356a0487eb1d42589b","https://git.kernel.org/stable/c/153d1b8b5bc30847eb70ad535f62f289aa9217e6","https://git.kernel.org/stable/c/d38f8bd771c4999b797d7074b348cf201414bd34"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-72314","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-72314","identifiers":["CVE-2026-72314"]},"retained":false,"historicalAffected":[]}],"coverage":[]}