{"id":"CVE-2026-46011","summary":"media: mtk-jpeg: fix use-after-free in release path due to uncancelled work","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: mtk-jpeg: fix use-after-free in release path due to uncancelled work\n\nThe mtk_jpeg_release() function frees the context structure (ctx) without\nfirst cancelling any pending or running work in ctx-\u003ejpeg_work. This\ncreates a race window where the workqueue callback may still be accessing\nthe context memory after it has been freed.\n\nRace condition:\n\n    CPU 0 (release)                    CPU 1 (workqueue)\n    ----------------                   ------------------\n    close()\n      mtk_jpeg_release()\n                                       mtk_jpegenc_worker()\n                                         ctx = work-\u003edata\n                                         // accessing ctx\n\n        kfree(ctx)  // freed!\n                                         access ctx  // UAF!\n\nThe work is queued via queue_work() during JPEG encode/decode operations\n(via mtk_jpeg_device_run). If the device is closed while work is pending\nor running, the work handler will access freed memory.\n\nFix this by calling cancel_work_sync() BEFORE acquiring the mutex. This\nordering is critical: if cancel_work_sync() is called after mutex_lock(),\nand the work handler also tries to acquire the same mutex, it would cause\na deadlock.\n\nNote: The open error path does NOT need cancel_work_sync() because\nINIT_WORK() only initializes the work structure - it does not schedule\nit. Work is only scheduled later during ioctl operations.","modified":"2026-06-18T03:54:40.836556248Z","published":"2026-05-27T12:56:13.198Z","related":["openSUSE-SU-2026:10954-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46011.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0498b27a1542021d90269d58347501d4c3ccd84e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/2209fdae5c2f615930c9af1379c1cfca199ec5d8"},{"type":"WEB","url":"https://git.kernel.org/stable/c/26506a30e0e26d612f82a7bf0e395626968a44e6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/34c519feef3e4fcff1078dc8bdb25fbbbd10303f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e78c39f720679fcf3a2eacd82725ec3ea2648301"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46011.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-46011"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"5fb1c2361e5630491d2a2f9359654eb022601bc0"},{"fixed":"2209fdae5c2f615930c9af1379c1cfca199ec5d8"},{"fixed":"0498b27a1542021d90269d58347501d4c3ccd84e"},{"fixed":"26506a30e0e26d612f82a7bf0e395626968a44e6"},{"fixed":"e78c39f720679fcf3a2eacd82725ec3ea2648301"},{"fixed":"34c519feef3e4fcff1078dc8bdb25fbbbd10303f"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-46011.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.140"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.86"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.27"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.0.4"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-46011.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}