{"id":"CVE-2026-68213","revision":null,"records":[{"revision":"ab870cbe4854474aa5d32c6f508c1cdd","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-68213","aliases":[],"title":"media: rtl2832_sdr: Return queued buffers on start_streaming() failure","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: rtl2832_sdr: Return queued buffers on start_streaming() failure\n\nThe vb2 framework hands buffers to the driver via buf_queue() before\ncalling start_streaming(). If start_streaming() returns an error\nwithout first returning those buffers via vb2_buffer_done(),\nvb2_start_streaming() fires WARN_ON(owned_by_drv_count) and the queued\nbuffers leak.\n\nrtl2832_sdr_start_streaming() had multiple error paths that hit this\ntrap: two direct early returns (-ENODEV, -ERESTARTSYS), plus six\n`goto err` paths covering subdev s_power, tuner setup, ADC setup,\nstream-buffer allocation, urb allocation, and urb submission failures.\nNone of them returned the queued buffers.\n\nThe original function had no distinct success exit and fell straight\nthrough into the err label, which previously only did mutex_unlock and\n\"return ret\". Adding queued-buffer cleanup at err must therefore be\npaired with an explicit success return; otherwise every successful\nstart would also drain the buffer queue and kill streaming. Add that\nsuccess return, then add rtl2832_sdr_cleanup_queued_bufs() at the err\nlabel and before each early return.\n\nThe cleanup helper takes a vb2_buffer_state argument so that the\nstart_streaming error paths can pass VB2_BUF_STATE_QUEUED (as\nexpected by userspace on start_streaming failure) while stop_streaming\nkeeps its existing VB2_BUF_STATE_ERROR semantics.\n\nThis mirrors the uvcvideo fix in commit 4cf3b6fd54eb (\"media: uvcvideo:\nReturn queued buffers on start_streaming() failure\").\n\nThe err label still does not roll back power_ctrl(), frontend_ctrl(),\nthe POWER_ON flag, or stream/URB allocations that may have happened\nbefore the failing step. Those are pre-existing leaks of a different\nclass and are not addressed here.","state":0,"publishedAt":"2026-08-10T12:00:32.514+00:00","modifiedAt":"2026-10-19T20:58:57.387+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/dvb-frontends/rtl2832_sdr.c\"\n ],\n \"versions\": [\n {\n \"version\": \"771138920eafa399f68d3492c8a75dfeea23474b\",\n \"lessThan\": \"fd1e11fc3849169285e48b2d4ec441614ad2ea74\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"771138920eafa399f68d3492c8a75dfeea23474b\",\n \"lessThan\": \"772f2550fe32357557d3b2f88e02f7cf477f0789\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"771138920eafa399f68d3492c8a75dfeea23474b\",\n \"lessThan\": \"a248273f8af6e630a03e823274385725974009b5\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"771138920eafa399f68d3492c8a75dfeea23474b\",\n \"lessThan\": \"465dc8e71d2db2ed603e749fa71392bcdccf07eb\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"771138920eafa399f68d3492c8a75dfeea23474b\",\n \"lessThan\": \"0b08c0403cf672a121ace4eff647a9b240bd4e1b\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"771138920eafa399f68d3492c8a75dfeea23474b\",\n \"lessThan\": \"894e83509c66910112b9eaeaa8cd66cd9806db91\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"771138920eafa399f68d3492c8a75dfeea23474b\",\n \"lessThan\": \"fc0b18782aab4e35078efe72863df8eab46560a8\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"771138920eafa399f68d3492c8a75dfeea23474b\",\n \"lessThan\": \"33ca0aab6f4bd90921fc1395478f38f72c4d19af\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\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/dvb-frontends/rtl2832_sdr.c\"\n ],\n \"versions\": [\n {\n \"version\": \"3.15\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"3.15\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.10.265\",\n \"lessThanOrEqual\": \"5.10.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.15.216\",\n \"lessThanOrEqual\": \"5.15.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.183\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.148\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.101\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.18.42\",\n \"lessThanOrEqual\": \"6.18.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.1.6\",\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/fd1e11fc3849169285e48b2d4ec441614ad2ea74","https://git.kernel.org/stable/c/772f2550fe32357557d3b2f88e02f7cf477f0789","https://git.kernel.org/stable/c/a248273f8af6e630a03e823274385725974009b5","https://git.kernel.org/stable/c/465dc8e71d2db2ed603e749fa71392bcdccf07eb","https://git.kernel.org/stable/c/0b08c0403cf672a121ace4eff647a9b240bd4e1b","https://git.kernel.org/stable/c/894e83509c66910112b9eaeaa8cd66cd9806db91","https://git.kernel.org/stable/c/fc0b18782aab4e35078efe72863df8eab46560a8","https://git.kernel.org/stable/c/33ca0aab6f4bd90921fc1395478f38f72c4d19af"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-68213","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-68213","identifiers":["CVE-2026-68213"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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Not a global EPSS backfill.","generation":"2026-11-08T15:12:21.7721538+00:00","complete":true,"records":1096,"lastAttemptAt":"2026-11-08T15:12:21.7721538+00:00","lastSuccessAt":"2026-11-08T15:12:25.6162622+00:00","error":null,"lastVerifiedAt":"2026-11-08T15:12:25.6162636+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. 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