{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-68222","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-07-30T09:28:09.375Z","datePublished":"2026-08-10T12:00:42.687Z","dateUpdated":"2026-08-19T16:31:51.745Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-19T16:31:51.745Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: msi2500: 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\nmsi2500_start_streaming() had five error paths that all hit this trap\nand were further tangled by ret-overwriting between calls:\n\n  - -ENODEV when the USB device was already disconnected\n  - -ERESTARTSYS when mutex_lock_interruptible() was interrupted\n  - msi2500_set_usb_adc() failure: ret was silently overwritten by\n    the next call (msi2500_isoc_init), so the error was lost entirely\n  - msi2500_isoc_init() failure: cleanup_queued_bufs was called, but\n    the function then fell through to msi2500_ctrl_msg() and again\n    masked the original error by overwriting ret\n  - msi2500_ctrl_msg(CMD_START_STREAMING) failure: no cleanup at all,\n    leaving isoc URBs submitted with no way for the driver to consume\n    them\n\nConsolidate the error paths into a small goto chain.  Every failure\nnow stops the function, drains the queued-buffer list, and returns\nthe real error code.  The ctrl_msg failure path also rolls back the\npreceding msi2500_isoc_init() via msi2500_isoc_cleanup() before\nunlocking and draining.\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\")."}],"metrics":[{"cvssV3_1":{"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"},"scenarios":[{"lang":"en","value":"AV:L - The vulnerable code is reached only through a local VIDIOC_STREAMON ioctl on the msi2500 SDR character device /dev/swradioN; no network or remote input is involved, and the failure paths are driven from a local process's syscalls.\nAC:L - The attacker controls both sides of the trigger: hold dev->v4l2_lock from a second thread and send a signal to the STREAMON thread so mutex_lock_interruptible() returns -ERESTARTSYS, hitting the leaking error path deterministically and repeatably.\nPR:L - Only an unprivileged local user with access to the V4L2/SDR device node is needed; on desktop, Android and embedded systems these nodes are granted to the logged-in seat or a device group, and no capability check guards STREAMON.\nUI:N - The whole sequence (REQBUFS, QBUF, STREAMON, signal, repeat) is performed by the attacker's own process; no victim action such as plugging in hardware or opening a file is required.\nS:U - The corruption is confined to kernel memory managed by the same kernel security authority; no VM, IOMMU or sandbox boundary is crossed.\nC:H - Buffers left on dev->queued_bufs after the vb2 core reclaims and later frees them become dangling pointers reused by cleanup_queued_bufs()/get_next_fill_buf(), giving a use-after-free that can be groomed to read reclaimed kernel heap contents back into userspace buffers.\nI:H - The stale list entries permit list_add_tail() on an already-linked node (list corruption) and vb2_buffer_done()/isoc-handler writes into freed objects, yielding attacker-influenced kernel heap writes exploitable for control-flow hijacking.\nA:H - At minimum the missing buffer return trips WARN_ON(owned_by_drv_count) (fatal with panic_on_warn) and leaks buffers; the resulting list corruption and use-after-free reliably oops or hang the kernel."}]}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/media/usb/msi2500/msi2500.c"],"versions":[{"version":"977e444f59ad16eedf66acae4f357011c74da291","lessThan":"c74b680704baecea4620c0774de473069e0bc4e8","status":"affected","versionType":"git"},{"version":"977e444f59ad16eedf66acae4f357011c74da291","lessThan":"2d10eedb786a13f91d76e11320fabb0bf712519f","status":"affected","versionType":"git"},{"version":"977e444f59ad16eedf66acae4f357011c74da291","lessThan":"2de14ddb4fea04ca616403a6ba81c5e8099e9b9e","status":"affected","versionType":"git"},{"version":"977e444f59ad16eedf66acae4f357011c74da291","lessThan":"1d58229b330b7f67fbfa07e0f2a8a51fbeafaa9a","status":"affected","versionType":"git"},{"version":"977e444f59ad16eedf66acae4f357011c74da291","lessThan":"bab9d5a67d4db96ae8c187b92b37979911302a10","status":"affected","versionType":"git"},{"version":"977e444f59ad16eedf66acae4f357011c74da291","lessThan":"264b5380c4f8aa92dbc2983ecd2b627f1d5e0061","status":"affected","versionType":"git"},{"version":"977e444f59ad16eedf66acae4f357011c74da291","lessThan":"3673cb0a5711e910074d69201da9e1535c03f97a","status":"affected","versionType":"git"},{"version":"977e444f59ad16eedf66acae4f357011c74da291","lessThan":"7201c17786a498497bca57752883b90914d405ac","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/media/usb/msi2500/msi2500.c"],"versions":[{"version":"3.12","status":"affected"},{"version":"0","lessThan":"3.12","status":"unaffected","versionType":"semver"},{"version":"5.10.265","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.216","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.183","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.148","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.101","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.42","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.1.6","lessThanOrEqual":"7.1.*","status":"unaffected","versionType":"semver"},{"version":"7.2","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.12","versionEndExcluding":"5.10.265"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.12","versionEndExcluding":"5.15.216"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.12","versionEndExcluding":"6.1.183"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.12","versionEndExcluding":"6.6.148"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.12","versionEndExcluding":"6.12.101"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.12","versionEndExcluding":"6.18.42"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.12","versionEndExcluding":"7.1.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.12","versionEndExcluding":"7.2"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/c74b680704baecea4620c0774de473069e0bc4e8"},{"url":"https://git.kernel.org/stable/c/2d10eedb786a13f91d76e11320fabb0bf712519f"},{"url":"https://git.kernel.org/stable/c/2de14ddb4fea04ca616403a6ba81c5e8099e9b9e"},{"url":"https://git.kernel.org/stable/c/1d58229b330b7f67fbfa07e0f2a8a51fbeafaa9a"},{"url":"https://git.kernel.org/stable/c/bab9d5a67d4db96ae8c187b92b37979911302a10"},{"url":"https://git.kernel.org/stable/c/264b5380c4f8aa92dbc2983ecd2b627f1d5e0061"},{"url":"https://git.kernel.org/stable/c/3673cb0a5711e910074d69201da9e1535c03f97a"},{"url":"https://git.kernel.org/stable/c/7201c17786a498497bca57752883b90914d405ac"}],"title":"media: msi2500: Return queued buffers on start_streaming() failure","x_generator":{"engine":"bippy-1.2.0"}}}}