222 lines
12 KiB
JSON
222 lines
12 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-2026-46058",
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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": "2026-05-13T15:03:33.095Z",
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"datePublished": "2026-05-27T12:57:17.853Z",
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"dateUpdated": "2026-08-05T12:29:25.621Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T12:29:25.621Z"
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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: amphion: Fix race between m2m job_abort and device_run\n\nFix kernel panic caused by race condition where v4l2_m2m_ctx_release()\nfrees m2m_ctx while v4l2_m2m_try_run() is about to call device_run\nwith the same context.\n\nRace sequence:\n v4l2_m2m_try_run(): v4l2_m2m_ctx_release():\n lock/unlock v4l2_m2m_cancel_job()\n job_abort()\n v4l2_m2m_job_finish()\n kfree(m2m_ctx) <- frees ctx\n device_run() <- use-after-free crash at 0x538\n\nCrash trace:\n Unable to handle kernel read from unreadable memory at virtual address\n 0000000000000538\n v4l2_m2m_try_run+0x78/0x138\n v4l2_m2m_device_run_work+0x14/0x20\n\nThe amphion vpu driver does not rely on the m2m framework's device_run\ncallback to perform encode/decode operations.\n\nFix the race by preventing m2m framework job scheduling entirely:\n- Add job_ready callback returning 0 (no jobs ready for m2m framework)\n- Remove job_abort callback to avoid the race condition"
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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 amphion VPU is a V4L2 mem2mem device reached only through a local `/dev/videoN` device file via open/ioctl/close; there is no network or remote path to this code.\nAC:L - The flaw is a race the attacker fully controls by running one thread that streams/queues buffers (scheduling a job) and another that closes the fd (triggering release); it can be retried in a loop until won.\nPR:L - Exploitation requires a local unprivileged user with access to the V4L2 device node (typically granted via the video group or logged-in session ACL); no root is needed.\nUI:N - The attacker performs all steps (open, stream, concurrent close) itself; no action by any other user is required.\nS:U - The vulnerability and its impact are confined to the kernel's own security authority with no crossing of a VM/IOMMU/sandbox boundary.\nC:H - The freed `m2m_ctx` is dereferenced after `kfree` (use-after-free per the fix), and a UAF over a slab object the attacker can groom/reallocate is treated as enabling arbitrary read of freed contents.\nI:H - The use-after-free on the freed context permits heap grooming/reallocation of the object that is then dereferenced, providing a write/control primitive consistent with kernel UAF integrity impact.\nA:H - The race reliably faults on an invalid pointer in `v4l2_m2m_try_run`, producing a kernel oops/panic and denial of service."
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}
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]
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}
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],
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"affected": [
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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/platform/amphion/vpu_v4l2.c"
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],
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"versions": [
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{
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"version": "3cd084519c6f91cbef9d604bcf26844fa81d4922",
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"lessThan": "516467052fdfc6a13eadc70d43420ae57436bf3c",
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"status": "affected",
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"versionType": "git"
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"status": "affected",
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"status": "affected",
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{
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"lessThan": "fdc150dac1adb9a98be9d6956cff0348838b024a",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "3cd084519c6f91cbef9d604bcf26844fa81d4922",
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"lessThan": "6be2cb75bc1300080cfc8051579f22efae9401f7",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "3cd084519c6f91cbef9d604bcf26844fa81d4922",
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"lessThan": "8cd35ceadcfc8c5da2eb7f7ce24525ce9d4ee62e",
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"status": "affected",
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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": "affected",
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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/platform/amphion/vpu_v4l2.c"
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],
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"versions": [
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{
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"version": "5.18",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "5.18",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.175",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.140",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.86",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.27",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.0.4",
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"lessThanOrEqual": "7.0.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.1",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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"nodes": [
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"operator": "OR",
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/516467052fdfc6a13eadc70d43420ae57436bf3c"
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},
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{
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"url": "https://git.kernel.org/stable/c/42dc622776f3ce1a6c31b13bdc686f7295e3b323"
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},
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{
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"url": "https://git.kernel.org/stable/c/da4f46c5cf1d26e6b09418ad453e152f2e75a02c"
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{
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"url": "https://git.kernel.org/stable/c/fdc150dac1adb9a98be9d6956cff0348838b024a"
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{
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"url": "https://git.kernel.org/stable/c/6be2cb75bc1300080cfc8051579f22efae9401f7"
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{
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"url": "https://git.kernel.org/stable/c/8cd35ceadcfc8c5da2eb7f7ce24525ce9d4ee62e"
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}
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],
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"title": "media: amphion: Fix race between m2m job_abort and device_run",
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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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}
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} |