{"id":"CVE-2026-31585","state":"PUBLISHED","title":"media: vidtv: fix nfeeds state corruption on start_streaming failure","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: vidtv: fix nfeeds state corruption on start_streaming failure\n\nsyzbot reported a memory leak in vidtv_psi_service_desc_init [1].\n\nWhen vidtv_start_streaming() fails inside vidtv_start_feed(), the\nnfeeds counter is left incremented even though no feed was actually\nstarted. This corrupts the driver state: subsequent start_feed calls\nsee nfeeds > 1 and skip starting the mux, while stop_feed calls\neventually try to stop a non-existent stream.\n\nThis state corruption can also lead to memory leaks, since the mux\nand channel resources may be partially allocated during a failed\nstart_streaming but never cleaned up, as the stop path finds\ndvb->streaming == false and returns early.\n\nFix by decrementing nfeeds back when start_streaming fails, keeping\nthe counter in sync with the actual number of active feeds.\n\n[1]\nBUG: memory leak\nunreferenced object 0xffff888145b50820 (size 32):\n comm \"syz.0.17\", pid 6068, jiffies 4294944486\n backtrace (crc 90a0c7d4):\n  vidtv_psi_service_desc_init+0x74/0x1b0 drivers/media/test-drivers/vidtv/vidtv_psi.c:288\n  vidtv_channel_s302m_init+0xb1/0x2a0 drivers/media/test-drivers/vidtv/vidtv_channel.c:83\n  vidtv_channels_init+0x1b/0x40 drivers/media/test-drivers/vidtv/vidtv_channel.c:524\n  vidtv_mux_init+0x516/0xbe0 drivers/media/test-drivers/vidtv/vidtv_mux.c:518\n  vidtv_start_streaming drivers/media/test-drivers/vidtv/vidtv_bridge.c:194 [inline]\n  vidtv_start_feed+0x33e/0x4d0 drivers/media/test-drivers/vidtv/vidtv_bridge.c:239","publishedAt":"2026-04-24T14:42:14.266Z","updatedAt":"2026-06-14T17:42:17.844Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"f90cf6079bf67988f8b1ad1ade70fc89d0080905","status":"affected","lessThan":"f8cccb427e65d725fc0ba05e8900b4676eda268e","versionType":"git"},{"version":"f90cf6079bf67988f8b1ad1ade70fc89d0080905","status":"affected","lessThan":"60f768d46df561e06d92ffcacc00909f37a0f23d","versionType":"git"},{"version":"f90cf6079bf67988f8b1ad1ade70fc89d0080905","status":"affected","lessThan":"80900b5424f3454256153ce386388df43b324f63","versionType":"git"},{"version":"f90cf6079bf67988f8b1ad1ade70fc89d0080905","status":"affected","lessThan":"17cb7957c979529cc98ff57f7ac331532f1f7c83","versionType":"git"},{"version":"f90cf6079bf67988f8b1ad1ade70fc89d0080905","status":"affected","lessThan":"98c22210aeadce67d9d20059f0dbbd01ba7fdbba","versionType":"git"},{"version":"f90cf6079bf67988f8b1ad1ade70fc89d0080905","status":"affected","lessThan":"25f19e476ab15defe698504212899fdb9f7cd61b","versionType":"git"},{"version":"f90cf6079bf67988f8b1ad1ade70fc89d0080905","status":"affected","lessThan":"83110c2c8c46c035c2e0fc8ff3e4991183bf9ccd","versionType":"git"},{"version":"f90cf6079bf67988f8b1ad1ade70fc89d0080905","status":"affected","lessThan":"4bf95f797edd63c93330eafb6d6e670982344b9b","versionType":"git"},{"version":"f90cf6079bf67988f8b1ad1ade70fc89d0080905","status":"affected","lessThan":"a0e5a598fe9a4612b852406b51153b881592aede","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/media/test-drivers/vidtv/vidtv_bridge.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.10","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.10","versionType":"semver"},{"version":"5.10.258","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.209","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.175","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.136","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.83","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.24","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.14","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0.1","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/media/test-drivers/vidtv/vidtv_bridge.c"]}],"references":["https://git.kernel.org/stable/c/f8cccb427e65d725fc0ba05e8900b4676eda268e","https://git.kernel.org/stable/c/60f768d46df561e06d92ffcacc00909f37a0f23d","https://git.kernel.org/stable/c/80900b5424f3454256153ce386388df43b324f63","https://git.kernel.org/stable/c/17cb7957c979529cc98ff57f7ac331532f1f7c83","https://git.kernel.org/stable/c/98c22210aeadce67d9d20059f0dbbd01ba7fdbba","https://git.kernel.org/stable/c/25f19e476ab15defe698504212899fdb9f7cd61b","https://git.kernel.org/stable/c/83110c2c8c46c035c2e0fc8ff3e4991183bf9ccd","https://git.kernel.org/stable/c/4bf95f797edd63c93330eafb6d6e670982344b9b","https://git.kernel.org/stable/c/a0e5a598fe9a4612b852406b51153b881592aede"],"weaknesses":[],"ingestedAt":"2026-10-29T20:11:40.391Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/31xxx/CVE-2026-31585.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-31585","state":"PUBLISHED","datePublished":"2026-04-24T14:42:14.266Z","dateUpdated":"2026-06-14T17:42:17.844Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-03-09T15:48:24.120Z"},"containers":{"cna":{"title":"media: vidtv: fix nfeeds state corruption on start_streaming failure","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: vidtv: fix nfeeds state corruption on start_streaming failure\n\nsyzbot reported a memory leak in vidtv_psi_service_desc_init [1].\n\nWhen vidtv_start_streaming() fails inside vidtv_start_feed(), the\nnfeeds counter is left incremented even though no feed was actually\nstarted. This corrupts the driver state: subsequent start_feed calls\nsee nfeeds > 1 and skip starting the mux, while stop_feed calls\neventually try to stop a non-existent stream.\n\nThis state corruption can also lead to memory leaks, since the mux\nand channel resources may be partially allocated during a failed\nstart_streaming but never cleaned up, as the stop path finds\ndvb->streaming == false and returns early.\n\nFix by decrementing nfeeds back when start_streaming fails, keeping\nthe counter in sync with the actual number of active feeds.\n\n[1]\nBUG: memory leak\nunreferenced object 0xffff888145b50820 (size 32):\n comm \"syz.0.17\", pid 6068, jiffies 4294944486\n backtrace (crc 90a0c7d4):\n  vidtv_psi_service_desc_init+0x74/0x1b0 drivers/media/test-drivers/vidtv/vidtv_psi.c:288\n  vidtv_channel_s302m_init+0xb1/0x2a0 drivers/media/test-drivers/vidtv/vidtv_channel.c:83\n  vidtv_channels_init+0x1b/0x40 drivers/media/test-drivers/vidtv/vidtv_channel.c:524\n  vidtv_mux_init+0x516/0xbe0 drivers/media/test-drivers/vidtv/vidtv_mux.c:518\n  vidtv_start_streaming drivers/media/test-drivers/vidtv/vidtv_bridge.c:194 [inline]\n  vidtv_start_feed+0x33e/0x4d0 drivers/media/test-drivers/vidtv/vidtv_bridge.c:239"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"f90cf6079bf67988f8b1ad1ade70fc89d0080905","status":"affected","lessThan":"f8cccb427e65d725fc0ba05e8900b4676eda268e","versionType":"git"},{"version":"f90cf6079bf67988f8b1ad1ade70fc89d0080905","status":"affected","lessThan":"60f768d46df561e06d92ffcacc00909f37a0f23d","versionType":"git"},{"version":"f90cf6079bf67988f8b1ad1ade70fc89d0080905","status":"affected","lessThan":"80900b5424f3454256153ce386388df43b324f63","versionType":"git"},{"version":"f90cf6079bf67988f8b1ad1ade70fc89d0080905","status":"affected","lessThan":"17cb7957c979529cc98ff57f7ac331532f1f7c83","versionType":"git"},{"version":"f90cf6079bf67988f8b1ad1ade70fc89d0080905","status":"affected","lessThan":"98c22210aeadce67d9d20059f0dbbd01ba7fdbba","versionType":"git"},{"version":"f90cf6079bf67988f8b1ad1ade70fc89d0080905","status":"affected","lessThan":"25f19e476ab15defe698504212899fdb9f7cd61b","versionType":"git"},{"version":"f90cf6079bf67988f8b1ad1ade70fc89d0080905","status":"affected","lessThan":"83110c2c8c46c035c2e0fc8ff3e4991183bf9ccd","versionType":"git"},{"version":"f90cf6079bf67988f8b1ad1ade70fc89d0080905","status":"affected","lessThan":"4bf95f797edd63c93330eafb6d6e670982344b9b","versionType":"git"},{"version":"f90cf6079bf67988f8b1ad1ade70fc89d0080905","status":"affected","lessThan":"a0e5a598fe9a4612b852406b51153b881592aede","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/media/test-drivers/vidtv/vidtv_bridge.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.10","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.10","versionType":"semver"},{"version":"5.10.258","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.209","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.175","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.136","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.83","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.24","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.14","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0.1","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/media/test-drivers/vidtv/vidtv_bridge.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/f8cccb427e65d725fc0ba05e8900b4676eda268e"},{"url":"https://git.kernel.org/stable/c/60f768d46df561e06d92ffcacc00909f37a0f23d"},{"url":"https://git.kernel.org/stable/c/80900b5424f3454256153ce386388df43b324f63"},{"url":"https://git.kernel.org/stable/c/17cb7957c979529cc98ff57f7ac331532f1f7c83"},{"url":"https://git.kernel.org/stable/c/98c22210aeadce67d9d20059f0dbbd01ba7fdbba"},{"url":"https://git.kernel.org/stable/c/25f19e476ab15defe698504212899fdb9f7cd61b"},{"url":"https://git.kernel.org/stable/c/83110c2c8c46c035c2e0fc8ff3e4991183bf9ccd"},{"url":"https://git.kernel.org/stable/c/4bf95f797edd63c93330eafb6d6e670982344b9b"},{"url":"https://git.kernel.org/stable/c/a0e5a598fe9a4612b852406b51153b881592aede"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-06-14T17:42:17.844Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"5.10.258"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"5.15.209"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"6.1.175"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"6.6.136"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"6.12.83"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"6.18.24"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"6.19.14"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"7.0.1"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartI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