273 lines
13 KiB
JSON
273 lines
13 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-2020-36785",
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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": "2024-02-26T17:07:27.435Z",
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"datePublished": "2024-02-28T08:13:06.032Z",
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"dateUpdated": "2026-08-26T11:00:34.375Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"shortName": "Linux",
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"dateUpdated": "2026-08-26T11:00:34.375Z"
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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: atomisp: Fix use after free in atomisp_alloc_css_stat_bufs()\n\nThe \"s3a_buf\" is freed along with all the other items on the\n\"asd->s3a_stats\" list. It leads to a double free and a use after free."
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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 - Exploitation requires opening the AtomISP V4L2 `/dev/video*` node and issuing local ioctls (VIDIOC_REQBUFS / format setup) that call atomisp_alloc_css_stat_bufs(); it is not reachable via network or adjacent-protocol packets.\nAC:L - An attacker who can open the device can enable both S3A and DIS grids through normal camera configuration and force the dis_buf kzalloc failure (e.g., memory exhaustion), reliably hitting the deterministic double-free error path.\nPR:L - atomisp_open and the VIDIOC_REQBUFS path perform no CAP_SYS_ADMIN/root checks; access only needs an unprivileged local user with video-group or camera-permission access to the device node.\nUI:N - The attacker opens the device and issues the ioctls themselves; no separate victim interaction is required.\nS:U - Impact is kernel memory corruption within the host kernel privilege boundary (local privilege escalation/DoS), not a VM, IOMMU, or other cross-authority escape.\nC:H - Double-free/use-after-free of the list-linked s3a_buf enables heap reuse and arbitrary kernel memory reads once the freed object is reclaimed.\nI:H - The UAF/double-free allows heap spraying and corruption of freed kernel objects, enabling arbitrary write or control-flow hijacking primitives.\nA:H - The double-free/UAF reliably causes kernel oops, panic, or hang even without full exploitation."
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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/staging/media/atomisp/pci/atomisp_ioctl.c"
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],
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"versions": [
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{
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"product": "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/staging/media/atomisp/pci/atomisp_ioctl.c"
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],
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"versions": [
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{
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"version": "4.12",
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"status": "affected"
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},
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{
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"version": "5.8",
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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": "4.12",
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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": "4.18",
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"lessThan": "5.8",
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"status": "unaffected",
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},
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{
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"version": "5.10.37",
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"lessThanOrEqual": "5.10.*",
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"status": "unaffected",
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},
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{
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"version": "5.11.21",
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"lessThanOrEqual": "5.11.*",
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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": "5.12.4",
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"lessThanOrEqual": "5.12.*",
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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": "5.13",
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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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"versionStartIncluding": "4.12",
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"versionEndExcluding": "4.18"
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"timestamp": "2024-08-08T19:00:20.730320Z",
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"id": "CVE-2020-36785",
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"options": [
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