{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2025-68175", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-12-16T13:41:40.251Z", "datePublished": "2025-12-16T13:42:54.913Z", "dateUpdated": "2026-08-05T12:10:02.111Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:10:02.111Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: nxp: imx8-isi: Fix streaming cleanup on release\n\nThe current implementation unconditionally calls\nmxc_isi_video_cleanup_streaming() in mxc_isi_video_release(). This can\nlead to situations where any release call (like from a simple\n\"v4l2-ctl -l\") may release a currently streaming queue when called on\nsuch a device.\n\nThis is reproducible on an i.MX8MP board by streaming from an ISI\ncapture device using gstreamer:\n\n\tgst-launch-1.0 -v v4l2src device=/dev/videoX ! \\\n\t video/x-raw,format=GRAY8,width=1280,height=800,framerate=1/120 ! \\\n\t fakesink\n\nWhile this stream is running, querying the caps of the same device\nprovokes the error state:\n\n\tv4l2-ctl -l -d /dev/videoX\n\nThis results in the following trace:\n\n[ 155.452152] ------------[ cut here ]------------\n[ 155.452163] WARNING: CPU: 0 PID: 1708 at drivers/media/platform/nxp/imx8-isi/imx8-isi-pipe.c:713 mxc_isi_pipe_irq_handler+0x19c/0x1b0 [imx8_isi]\n[ 157.004248] Modules linked in: cfg80211 rpmsg_ctrl rpmsg_char rpmsg_tty virtio_rpmsg_bus rpmsg_ns rpmsg_core rfkill nft_ct nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nf_tables mcp251x6\n[ 157.053499] CPU: 0 UID: 0 PID: 1708 Comm: python3 Not tainted 6.15.4-00114-g1f61ca5cad76 #1 PREEMPT\n[ 157.064369] Hardware name: imx8mp_board_01 (DT)\n[ 157.068205] pstate: 400000c5 (nZcv daIF -PAN -UAO -TCO -DIT -SSBS BTYPE=--)\n[ 157.075169] pc : mxc_isi_pipe_irq_handler+0x19c/0x1b0 [imx8_isi]\n[ 157.081195] lr : mxc_isi_pipe_irq_handler+0x38/0x1b0 [imx8_isi]\n[ 157.087126] sp : ffff800080003ee0\n[ 157.090438] x29: ffff800080003ee0 x28: ffff0000c3688000 x27: 0000000000000000\n[ 157.097580] x26: 0000000000000000 x25: ffff0000c1e7ac00 x24: ffff800081b5ad50\n[ 157.104723] x23: 00000000000000d1 x22: 0000000000000000 x21: ffff0000c25e4000\n[ 157.111866] x20: 0000000060000200 x19: ffff80007a0608d0 x18: 0000000000000000\n[ 157.119008] x17: ffff80006a4e3000 x16: ffff800080000000 x15: 0000000000000000\n[ 157.126146] x14: 0000000000000000 x13: 0000000000000000 x12: 0000000000000000\n[ 157.133287] x11: 0000000000000040 x10: ffff0000c01445f0 x9 : ffff80007a053a38\n[ 157.140425] x8 : ffff0000c04004b8 x7 : 0000000000000000 x6 : 0000000000000000\n[ 157.147567] x5 : ffff0000c0400490 x4 : ffff80006a4e3000 x3 : ffff0000c25e4000\n[ 157.154706] x2 : 0000000000000000 x1 : ffff8000825c0014 x0 : 0000000060000200\n[ 157.161850] Call trace:\n[ 157.164296] mxc_isi_pipe_irq_handler+0x19c/0x1b0 [imx8_isi] (P)\n[ 157.170319] __handle_irq_event_percpu+0x58/0x218\n[ 157.175029] handle_irq_event+0x54/0xb8\n[ 157.178867] handle_fasteoi_irq+0xac/0x248\n[ 157.182968] handle_irq_desc+0x48/0x68\n[ 157.186723] generic_handle_domain_irq+0x24/0x38\n[ 157.191346] gic_handle_irq+0x54/0x120\n[ 157.195098] call_on_irq_stack+0x24/0x30\n[ 157.199027] do_interrupt_handler+0x88/0x98\n[ 157.203212] el0_interrupt+0x44/0xc0\n[ 157.206792] __el0_irq_handler_common+0x18/0x28\n[ 157.211328] el0t_64_irq_handler+0x10/0x20\n[ 157.215429] el0t_64_irq+0x198/0x1a0\n[ 157.219009] ---[ end trace 0000000000000000 ]---\n\nAddress this issue by moving the streaming preparation and cleanup to\nthe vb2 .prepare_streaming() and .unprepare_streaming() operations. This\nalso simplifies the driver by allowing direct usage of the\nvb2_ioctl_streamon() and vb2_ioctl_streamoff() helpers, and removal of\nthe manual cleanup from mxc_isi_video_release()." } ], "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 vulnerability is reached through open()/close() on a V4L2 capture character device (/dev/videoN) exposed by the i.MX8 ISI driver, which requires local access to the system. No network or physical-device interaction is involved.\nAC:L - A single attacker controls both sides entirely — open fd1 and STREAMON, then open and close fd2 — and the unconditional `mxc_isi_video_cleanup_streaming()` in the release path fires deterministically with no race window to win, as demonstrated by the reporter with plain gstreamer plus `v4l2-ctl -l`.\nPR:L - Only an unprivileged local user holding an open file descriptor on the ISI video node is needed (video-group/camera-service DAC access on typical i.MX8 embedded and Android-class deployments); no capabilities, root, or ioctl privilege checks guard the release path.\nUI:N - The attacker performs both the STREAMON and the second open/close from its own processes, so no victim action is required; a concurrently streaming system camera daemon merely provides an additional trigger path.\nS:U - The corruption stays within the kernel's own security authority — freed kernel DMA memory, media-controller heap objects, and ISI hardware channel state — with no VM, IOMMU, or sandbox boundary crossed.\nC:H - `media_pipeline_cleanup()` kfrees `media_pipeline_pad` objects that remain linked into a live pipeline and are read by subsequent pipeline walks, and the coherent DMA pages freed under active hardware use are recycled into arbitrary kernel allocations, making this a use-after-free that can be leveraged into kernel memory disclosure.\nI:H - After `dma_free_coherent()` the ISI engine keeps writing attacker-influenceable image data into those freed, reallocated kernel pages on every frame via the still-programmed stale DMA addresses, yielding a sustained arbitrary kernel-memory write primitive, compounded by hardware resource/refcount corruption from the premature channel release and unchain.\nA:H - The frame-end IRQ immediately hits `WARN_ON(!pipe->irq_handler)` in `mxc_isi_pipe_irq_handler()` (fatal with panic_on_warn), the DMA-after-free corrupts arbitrary kernel memory leading to oops/panic, and the premature `mxc_isi_channel_sw_reset()` breaks concurrent camera streams — all trivially and repeatedly triggerable." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/media/platform/nxp/imx8-isi/imx8-isi-video.c" ], "versions": [ { "version": "cf21f328fcafacf4f96e7a30ef9dceede1076378", "lessThan": "a2008925ed7361d69f92f63f0a779c300432610a", "status": "affected", "versionType": "git" }, { "version": "cf21f328fcafacf4f96e7a30ef9dceede1076378", "lessThan": "029914306b93b37c6e7060793d2b6f76b935cfa6", "status": "affected", "versionType": "git" }, { "version": "cf21f328fcafacf4f96e7a30ef9dceede1076378", "lessThan": "47773031a148ad7973b809cc7723cba77eda2b42", "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/platform/nxp/imx8-isi/imx8-isi-video.c" ], "versions": [ { "version": "6.4", "status": "affected" }, { "version": "0", "lessThan": "6.4", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.80", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.17.8", "lessThanOrEqual": "6.17.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18", "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": "6.4", "versionEndExcluding": "6.12.80" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "6.17.8" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "6.18" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/a2008925ed7361d69f92f63f0a779c300432610a" }, { "url": "https://git.kernel.org/stable/c/029914306b93b37c6e7060793d2b6f76b935cfa6" }, { "url": "https://git.kernel.org/stable/c/47773031a148ad7973b809cc7723cba77eda2b42" } ], "title": "media: nxp: imx8-isi: Fix streaming cleanup on release", "x_generator": { "engine": "bippy-1.2.0" } } } }