319 lines
17 KiB
JSON
319 lines
17 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2022-48945",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2024-08-22T01:27:53.624Z",
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"datePublished": "2024-09-23T09:46:40.851Z",
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"dateUpdated": "2026-08-05T08:53:04.470Z"
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},
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"containers": {
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"cna": {
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T08:53:04.470Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: vivid: fix compose size exceed boundary\n\nsyzkaller found a bug:\n\n BUG: unable to handle page fault for address: ffffc9000a3b1000\n #PF: supervisor write access in kernel mode\n #PF: error_code(0x0002) - not-present page\n PGD 100000067 P4D 100000067 PUD 10015f067 PMD 1121ca067 PTE 0\n Oops: 0002 [#1] PREEMPT SMP\n CPU: 0 PID: 23489 Comm: vivid-000-vid-c Not tainted 6.1.0-rc1+ #512\n Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014\n RIP: 0010:memcpy_erms+0x6/0x10\n[...]\n Call Trace:\n <TASK>\n ? tpg_fill_plane_buffer+0x856/0x15b0\n vivid_fillbuff+0x8ac/0x1110\n vivid_thread_vid_cap_tick+0x361/0xc90\n vivid_thread_vid_cap+0x21a/0x3a0\n kthread+0x143/0x180\n ret_from_fork+0x1f/0x30\n </TASK>\n\nThis is because we forget to check boundary after adjust compose->height\nint V4L2_SEL_TGT_CROP case. Add v4l2_rect_map_inside() to fix this problem\nfor this case."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:L - The bug is reached only via local V4L2 ioctls (VIDIOC_S_SELECTION / STREAMON) on the vivid /dev/videoN node; there is no network or adjacent-protocol path into vivid_vid_cap_s_selection or the capture kthread fill path.\nAC:L - An attacker-controlled, race-free ioctl sequence (enable crop+compose+scaler, set a crop that expands compose past fmt) deterministically leaves compose outside the buffer bounds; syzkaller reproduces the page-fault OOB write reliably.\nPR:L - Opening the vivid video node and issuing S_SELECTION requires no capability check—only video-group or seat uaccess on /dev/videoN—and crop/compose/scaler are ordinary unprivileged V4L2 controls (default-enabled).\nUI:N - The attacker opens the device, configures selection/format/streaming themselves; the OOB write then runs in the vivid capture kthread with no victim action.\nS:U - The out-of-bounds write corrupts kernel memory within the host kernel’s security authority and does not cross a VM, IOMMU, or sandbox boundary.\nC:H - Heap/vmalloc memory corruption from the oversized compose write is leverageable for kernel information disclosure (same class as CVE-2025-38226), and related loop/copy paths can surface adjacent data into attacker-readable capture buffers.\nI:H - This is an attacker-triggered out-of-bounds write in tpg_fill_plane_buffer (memcpy past the allocated frame buffer via compose.top/height/left), a classic heap corruption primitive suitable for control-flow hijacking.\nA:H - The demonstrated effect is a kernel oops (supervisor write page fault in memcpy_erms during tpg_fill_plane_buffer in the vivid kthread), which can panic the machine and is re-triggerable at will."
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}
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]
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}
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],
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/media/test-drivers/vivid/vivid-vid-cap.c"
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],
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"drivers/media/test-drivers/vivid/vivid-vid-cap.c"
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"url": "https://git.kernel.org/stable/c/94a7ad9283464b75b12516c5512541d467cefcf8"
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}
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],
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"title": "media: vivid: fix compose size exceed boundary",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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},
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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"timestamp": "2024-09-29T14:21:20.078497Z",
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"id": "CVE-2022-48945",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "partial"
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}
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],
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"role": "CISA Coordinator",
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"version": "2.0.3"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2024-09-29T14:21:31.001Z"
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}
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}
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]
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}
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} |