{"id":"CVE-2026-89741","revision":"ed9b9252f2744bbe92401c9a774c6401","records":[{"revision":"ed9b9252f2744bbe92401c9a774c6401","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-89741","aliases":[],"title":"Revert \"media: v4l2-dev: fix error handling in __video_register_device()\"","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nRevert \"media: v4l2-dev: fix error handling in __video_register_device()\"\n\nThis reverts commit 2a934fdb01db6458288fc9386d3d8ceba6dd551a.\n\nThe intentions of that patch were good, but it doesn't work.\n\nThe idea is that if device_register fails, you have to do a put_device\nto let the ref counter release resources.\n\nHowever, the V4L2 API says that if video_register_device() fails, then\nyou have to call video_device_release(), which kfree()s the video_device\nstruct.\n\nBut the put_device() will already have freed the struct, so you end\nup in a double-free scenario.\n\nThere is not really a good way of fixing this without breaking\nvideo_register_device() into two parts, one that initializes everything,\nand one that does the actual device_register, and then converting all\nV4L2 drivers to this new model.\n\nThat is a massive job, and it is very unlikely that device_register\nwill fail.\n\nSo rather than ending up in a double-free scenario, just revert this\npatch, and in that case we'll have a small memory leak. Which is a lot\nmore robust.","state":0,"publishedAt":"2026-09-11T19:46:47.877+00:00","modifiedAt":"2026-10-19T08:51:55.196+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/media/v4l2-core/v4l2-dev.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"e5c8e62ae551e0ad2e15412aa0c57c2856d59677\",\n                            \"lessThan\": \"8b998c171ed875e402e1fd1c5cd619e4ca05e9c1\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"8b451a9a46f2bfc510e6d5c2492df91647586184\",\n                            \"lessThan\": \"3de14b4f681a1b3c6d375d98d9d37a55ebb85349\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"b6be1f5633eae200af2527e9eeb7f51be5739b0f\",\n                            \"lessThan\": \"8027f82c0f5474ed72448e160ee9778051fa1f49\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"ae7b143e05b36fc69d6571751855946cc45064c6\",\n                            \"lessThan\": \"2ac009a65d2385e9f0799eaf9d9694a29153a161\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"2429bb9fad88c8fa84c4956b0a21cf5afe5e92b7\",\n                            \"lessThan\": \"712ca1cf756de2557a116e0df55791bac0c9f99e\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"2a934fdb01db6458288fc9386d3d8ceba6dd551a\",\n                            \"lessThan\": \"aad08b5f67d2a8116e1a00bce2611c1513b10bce\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"2a934fdb01db6458288fc9386d3d8ceba6dd551a\",\n                            \"lessThan\": \"ce792b94e03882108019ba996c1a7c4d4e09be2c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"2a934fdb01db6458288fc9386d3d8ceba6dd551a\",\n                            \"lessThan\": \"e7600f5cee5de14065f950807931d6e6d40fb2d7\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"ee141706e701356dda41c6fed9ee18bf427c28e3\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"4451412739ed33a49b34624299394ee575116d0c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"5.10.239\",\n                            \"lessThan\": \"5.10.270\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.186\",\n                            \"lessThan\": \"5.15.221\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.142\",\n                            \"lessThan\": \"6.1.188\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.95\",\n                            \"lessThan\": \"6.6.157\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.35\",\n                            \"lessThan\": \"6.12.109\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.4.295\",\n                            \"lessThan\": \"5.5\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.15.4\",\n                            \"lessThan\": \"6.16\",\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/media/v4l2-core/v4l2-dev.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.16\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.16\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.270\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.221\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.188\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.157\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.109\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.50\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.4\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\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/8b998c171ed875e402e1fd1c5cd619e4ca05e9c1","https://git.kernel.org/stable/c/3de14b4f681a1b3c6d375d98d9d37a55ebb85349","https://git.kernel.org/stable/c/8027f82c0f5474ed72448e160ee9778051fa1f49","https://git.kernel.org/stable/c/2ac009a65d2385e9f0799eaf9d9694a29153a161","https://git.kernel.org/stable/c/712ca1cf756de2557a116e0df55791bac0c9f99e","https://git.kernel.org/stable/c/aad08b5f67d2a8116e1a00bce2611c1513b10bce","https://git.kernel.org/stable/c/ce792b94e03882108019ba996c1a7c4d4e09be2c","https://git.kernel.org/stable/c/e7600f5cee5de14065f950807931d6e6d40fb2d7"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-89741","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-89741","identifiers":["CVE-2026-89741"]},"retained":false,"historicalAffected":[]}],"coverage":[]}