{"api_version":"1","generated_at":"2026-09-17T08:30:50+00:00","cve":"CVE-2026-89880","urls":{"html":"https://cve.report/CVE-2026-89880","api":"https://cve.report/api/cve/CVE-2026-89880.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-89880","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-89880"},"summary":{"title":"media: rtl2832_sdr: release URBs and stream buffers on start_streaming() failure","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: rtl2832_sdr: release URBs and stream buffers on start_streaming() failure\n\nrtl2832_sdr_start_streaming() calls rtl2832_sdr_alloc_stream_bufs(),\nrtl2832_sdr_alloc_urbs() and rtl2832_sdr_submit_urbs() in sequence and\nshares a single err: label that only unlocks the mutex and returns.\nWhen alloc_urbs() succeeds but submit_urbs() fails, or when alloc_urbs()\nitself returns -ENOMEM after alloc_stream_bufs() has already succeeded,\nthe URBs and/or the coherent DMA stream buffers stay allocated while\nstreaming reports failure to vb2. Two latent defects follow on the next\nVIDIOC_STREAMON:\n\n1) rtl2832_sdr_alloc_stream_bufs() unconditionally resets dev->buf_num\n   to 0 and overwrites dev->buf_list[]/dev->dma_addr[], permanently\n   leaking the coherent DMA memory allocated by the previous attempt.\n\n2) rtl2832_sdr_alloc_urbs() never resets dev->urbs_initialized and only\n   increments it. After a second successful pass urbs_initialized can\n   exceed MAX_BULK_BUFS, so the subsequent rtl2832_sdr_free_urbs() walks\n   from urbs_initialized - 1 down to 0 and reads past the end of\n   dev->urb_list[], passing garbage pointers to usb_free_urb().\n\nMirror the teardown that stop_streaming() already performs: on the error\npath call rtl2832_sdr_free_urbs() and rtl2832_sdr_free_stream_bufs()\nbefore unlocking. Both helpers are idempotent (free_urbs kills and zeros\nurbs_initialized; free_stream_bufs is gated on URB_BUF and clears the\nbuf_num counter), so partial-failure paths and the no-allocation paths\nremain safe.\n\nIssue identified by automated review of the INV-003 series at\nhttps://sashiko.dev/","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-16 11:16:56","updated_at":"2026-09-16 15:18:14"},"problem_types":[],"metrics":[{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"references":[{"url":"https://git.kernel.org/stable/c/8bcf11a239eac4e224ad856277de9a36c91b1711","name":"https://git.kernel.org/stable/c/8bcf11a239eac4e224ad856277de9a36c91b1711","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/26a2a985bbeee3eaa6f80ff7de732161a171ec9f","name":"https://git.kernel.org/stable/c/26a2a985bbeee3eaa6f80ff7de732161a171ec9f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/fe50cdaebf12cd32ff9a44d92bfd6fbc2300dbd4","name":"https://git.kernel.org/stable/c/fe50cdaebf12cd32ff9a44d92bfd6fbc2300dbd4","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/0337ab0759285076a3f9dcfcc40906e69ab519b3","name":"https://git.kernel.org/stable/c/0337ab0759285076a3f9dcfcc40906e69ab519b3","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ac02b2c56ccef0788cea9b86990a8f349a3fc6d8","name":"https://git.kernel.org/stable/c/ac02b2c56ccef0788cea9b86990a8f349a3fc6d8","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c91e8ae2b39c6da81f26f2c9877d3fd33a4465ce","name":"https://git.kernel.org/stable/c/c91e8ae2b39c6da81f26f2c9877d3fd33a4465ce","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c819dea3a433ae790b829443fdcc1715d1586560","name":"https://git.kernel.org/stable/c/c819dea3a433ae790b829443fdcc1715d1586560","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f14a713a36a5c87568430e9770896f2a8f5bbbb7","name":"https://git.kernel.org/stable/c/f14a713a36a5c87568430e9770896f2a8f5bbbb7","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89880","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89880","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 771138920eafa399f68d3492c8a75dfeea23474b f14a713a36a5c87568430e9770896f2a8f5bbbb7 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 771138920eafa399f68d3492c8a75dfeea23474b c819dea3a433ae790b829443fdcc1715d1586560 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 771138920eafa399f68d3492c8a75dfeea23474b 0337ab0759285076a3f9dcfcc40906e69ab519b3 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 771138920eafa399f68d3492c8a75dfeea23474b c91e8ae2b39c6da81f26f2c9877d3fd33a4465ce git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 771138920eafa399f68d3492c8a75dfeea23474b 8bcf11a239eac4e224ad856277de9a36c91b1711 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 771138920eafa399f68d3492c8a75dfeea23474b 26a2a985bbeee3eaa6f80ff7de732161a171ec9f git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 771138920eafa399f68d3492c8a75dfeea23474b ac02b2c56ccef0788cea9b86990a8f349a3fc6d8 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 771138920eafa399f68d3492c8a75dfeea23474b fe50cdaebf12cd32ff9a44d92bfd6fbc2300dbd4 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3.15","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 3.15 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.10.270 5.10.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.221 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.188 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.157 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.110 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.51 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.5 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/media/dvb-frontends/rtl2832_sdr.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"f14a713a36a5c87568430e9770896f2a8f5bbbb7","status":"affected","version":"771138920eafa399f68d3492c8a75dfeea23474b","versionType":"git"},{"lessThan":"c819dea3a433ae790b829443fdcc1715d1586560","status":"affected","version":"771138920eafa399f68d3492c8a75dfeea23474b","versionType":"git"},{"lessThan":"0337ab0759285076a3f9dcfcc40906e69ab519b3","status":"affected","version":"771138920eafa399f68d3492c8a75dfeea23474b","versionType":"git"},{"lessThan":"c91e8ae2b39c6da81f26f2c9877d3fd33a4465ce","status":"affected","version":"771138920eafa399f68d3492c8a75dfeea23474b","versionType":"git"},{"lessThan":"8bcf11a239eac4e224ad856277de9a36c91b1711","status":"affected","version":"771138920eafa399f68d3492c8a75dfeea23474b","versionType":"git"},{"lessThan":"26a2a985bbeee3eaa6f80ff7de732161a171ec9f","status":"affected","version":"771138920eafa399f68d3492c8a75dfeea23474b","versionType":"git"},{"lessThan":"ac02b2c56ccef0788cea9b86990a8f349a3fc6d8","status":"affected","version":"771138920eafa399f68d3492c8a75dfeea23474b","versionType":"git"},{"lessThan":"fe50cdaebf12cd32ff9a44d92bfd6fbc2300dbd4","status":"affected","version":"771138920eafa399f68d3492c8a75dfeea23474b","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/media/dvb-frontends/rtl2832_sdr.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"3.15"},{"lessThan":"3.15","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.270","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.221","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.188","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.157","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.110","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.51","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.5","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.270","versionStartIncluding":"3.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.221","versionStartIncluding":"3.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.188","versionStartIncluding":"3.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.157","versionStartIncluding":"3.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.110","versionStartIncluding":"3.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.51","versionStartIncluding":"3.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.5","versionStartIncluding":"3.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc1","versionStartIncluding":"3.15","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: rtl2832_sdr: release URBs and stream buffers on start_streaming() failure\n\nrtl2832_sdr_start_streaming() calls rtl2832_sdr_alloc_stream_bufs(),\nrtl2832_sdr_alloc_urbs() and rtl2832_sdr_submit_urbs() in sequence and\nshares a single err: label that only unlocks the mutex and returns.\nWhen alloc_urbs() succeeds but submit_urbs() fails, or when alloc_urbs()\nitself returns -ENOMEM after alloc_stream_bufs() has already succeeded,\nthe URBs and/or the coherent DMA stream buffers stay allocated while\nstreaming reports failure to vb2. Two latent defects follow on the next\nVIDIOC_STREAMON:\n\n1) rtl2832_sdr_alloc_stream_bufs() unconditionally resets dev->buf_num\n   to 0 and overwrites dev->buf_list[]/dev->dma_addr[], permanently\n   leaking the coherent DMA memory allocated by the previous attempt.\n\n2) rtl2832_sdr_alloc_urbs() never resets dev->urbs_initialized and only\n   increments it. After a second successful pass urbs_initialized can\n   exceed MAX_BULK_BUFS, so the subsequent rtl2832_sdr_free_urbs() walks\n   from urbs_initialized - 1 down to 0 and reads past the end of\n   dev->urb_list[], passing garbage pointers to usb_free_urb().\n\nMirror the teardown that stop_streaming() already performs: on the error\npath call rtl2832_sdr_free_urbs() and rtl2832_sdr_free_stream_bufs()\nbefore unlocking. Both helpers are idempotent (free_urbs kills and zeros\nurbs_initialized; free_stream_bufs is gated on URB_BUF and clears the\nbuf_num counter), so partial-failure paths and the no-allocation paths\nremain safe.\n\nIssue identified by automated review of the INV-003 series at\nhttps://sashiko.dev/"}],"metrics":[{"cvssV3_1":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"scenarios":[{"lang":"en","value":"AV:L - The flaw is reached only through local V4L2 ioctls (VIDIOC_REQBUFS, VIDIOC_QBUF, VIDIOC_STREAMON) on the rtl2832_sdr /dev/swradioN node; USB bulk packets from the dongle never enter this start_streaming() error path.\nAC:L - The attacker drives both STREAMON attempts and can force the first submit_urbs() failure via USBDEVFS_RESET/DISCONNECT on the matching usbfs node or GFP_KERNEL memory pressure, then retry STREAMON; no race or layout outside their control is required.\nPR:L - v4l2_fh_open() and vb2_ioctl_streamon() perform no capability checks; only the SDR device node is needed, and udev uaccess/video-group rules grant it to unprivileged seat users on desktops, Android, and embedded RTL-SDR systems.\nUI:N - The attacking process issues REQBUFS/QBUF/STREAMON (and any usbfs reset) on its own file descriptors against an already-attached RTL2832; no separate victim action such as plugging in the dongle or opening a file is required.\nS:U - The urb_list[] overrun, leaked coherent DMA buffers, and resulting usb_submit_urb()/usb_free_urb() misuse stay in host kernel memory in the same OS security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - After a failed STREAMON, a second alloc_urbs() leaves urbs_initialized above MAX_BULK_BUFS, so submit_urbs()/free_urbs() read past urb_list[] and treat adjacent kernel fields (including live buf_list[] DMA pointers) as struct urb objects, an out-of-bounds/type-confused kernel read.\nI:H - usb_submit_urb() writes urb->ep/status/transfer_flags through those OOB-derived pointers, and the subsequent free_urbs() walk passes the same garbage to usb_free_urb()/kref_put, a type-confusion/slab-corruption write primitive suitable for control-flow hijack.\nA:H - usb_submit_urb() of the first out-of-bounds slot oopses the kernel (near-NULL from buf_num), and the attacker can repeat STREAMON after a forced submit failure to panic or hang the host at will."}]}],"providerMetadata":{"dateUpdated":"2026-09-16T14:39:31.925Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/f14a713a36a5c87568430e9770896f2a8f5bbbb7"},{"url":"https://git.kernel.org/stable/c/c819dea3a433ae790b829443fdcc1715d1586560"},{"url":"https://git.kernel.org/stable/c/0337ab0759285076a3f9dcfcc40906e69ab519b3"},{"url":"https://git.kernel.org/stable/c/c91e8ae2b39c6da81f26f2c9877d3fd33a4465ce"},{"url":"https://git.kernel.org/stable/c/8bcf11a239eac4e224ad856277de9a36c91b1711"},{"url":"https://git.kernel.org/stable/c/26a2a985bbeee3eaa6f80ff7de732161a171ec9f"},{"url":"https://git.kernel.org/stable/c/ac02b2c56ccef0788cea9b86990a8f349a3fc6d8"},{"url":"https://git.kernel.org/stable/c/fe50cdaebf12cd32ff9a44d92bfd6fbc2300dbd4"}],"title":"media: rtl2832_sdr: release URBs and stream buffers on start_streaming() failure","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-89880","datePublished":"2026-09-16T10:31:46.260Z","dateReserved":"2026-09-11T19:38:34.772Z","dateUpdated":"2026-09-16T14:39:31.925Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-16 11:16:56","lastModifiedDate":"2026-09-16 15:18:14","problem_types":[],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":5.9}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"89880","Ordinal":"1","Title":"media: rtl2832_sdr: release URBs and stream buffers on start_str","CVE":"CVE-2026-89880","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"89880","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: rtl2832_sdr: release URBs and stream buffers on start_streaming() failure\n\nrtl2832_sdr_start_streaming() calls rtl2832_sdr_alloc_stream_bufs(),\nrtl2832_sdr_alloc_urbs() and rtl2832_sdr_submit_urbs() in sequence and\nshares a single err: label that only unlocks the mutex and returns.\nWhen alloc_urbs() succeeds but submit_urbs() fails, or when alloc_urbs()\nitself returns -ENOMEM after alloc_stream_bufs() has already succeeded,\nthe URBs and/or the coherent DMA stream buffers stay allocated while\nstreaming reports failure to vb2. Two latent defects follow on the next\nVIDIOC_STREAMON:\n\n1) rtl2832_sdr_alloc_stream_bufs() unconditionally resets dev->buf_num\n   to 0 and overwrites dev->buf_list[]/dev->dma_addr[], permanently\n   leaking the coherent DMA memory allocated by the previous attempt.\n\n2) rtl2832_sdr_alloc_urbs() never resets dev->urbs_initialized and only\n   increments it. After a second successful pass urbs_initialized can\n   exceed MAX_BULK_BUFS, so the subsequent rtl2832_sdr_free_urbs() walks\n   from urbs_initialized - 1 down to 0 and reads past the end of\n   dev->urb_list[], passing garbage pointers to usb_free_urb().\n\nMirror the teardown that stop_streaming() already performs: on the error\npath call rtl2832_sdr_free_urbs() and rtl2832_sdr_free_stream_bufs()\nbefore unlocking. Both helpers are idempotent (free_urbs kills and zeros\nurbs_initialized; free_stream_bufs is gated on URB_BUF and clears the\nbuf_num counter), so partial-failure paths and the no-allocation paths\nremain safe.\n\nIssue identified by automated review of the INV-003 series at\nhttps://sashiko.dev/","Type":"Description","Title":"media: rtl2832_sdr: release URBs and stream buffers on start_str"}]}}}