138 lines
7.8 KiB
JSON
138 lines
7.8 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-2025-40069",
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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": "2025-04-16T07:20:57.159Z",
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"datePublished": "2025-10-28T11:48:38.232Z",
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"dateUpdated": "2026-08-05T12:07:32.509Z"
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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": "2026-08-05T12:07:32.509Z"
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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\ndrm/msm: Fix obj leak in VM_BIND error path\n\nIf we fail a handle-lookup part way thru, we need to drop the already\nobtained obj references.\n\nPatchwork: https://patchwork.freedesktop.org/patch/669784/"
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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 - Reached only through the `DRM_IOCTL_MSM_VM_BIND` ioctl on the local msm DRM device/render node, which requires an open file descriptor on `/dev/dri/renderD*`. There is no remote or adjacent-network path to this code.\nAC:L - Triggering is fully deterministic and race-free — a single VM_BIND ioctl with one MSM_VM_BIND_OP_MAP op carrying a handle not present in `file->object_idr` (any large value, since IDR ids are allocated from 1 upward) drives the error path every time. All other validation (page-aligned iova/range, VA range) is trivially satisfied using values queryable via MSM_PARAM_VA_START/VA_SIZE.\nPR:L - Every ioctl on the path (MSM_SET_PARAM, MSM_SUBMITQUEUE_NEW, MSM_VM_BIND) is marked `DRM_RENDER_ALLOW`, so no DRM master, authentication, or capability is needed, and `MSM_PARAM_EN_VM_BIND` has no `capable()` gate. Any unprivileged process that can open the render node — including an Android app, a Chrome GPU sandbox process, or a desktop user on a Snapdragon laptop — qualifies.\nUI:N - The attacker issues the ioctls entirely from their own process; no victim action, no file to open, no device to plug in is involved.\nS:U - The corruption and any resulting escalation stay within the kernel's own security authority on the same host, with no crossing of a hypervisor, IOMMU, or other separate security scope.\nC:H - The union-aliased handle is dereferenced as a `struct drm_gem_object *` at an address the attacker fully controls; if that access succeeds, `drm_gem_object_free()` proceeds to read `obj->funcs->free` from attacker-shaped memory, giving a memory-corruption primitive that can be leveraged into arbitrary kernel memory disclosure.\nI:H - `kref_put()` performs an atomic read-modify-write (decrement) at the attacker-supplied address, and reaching zero funnels into an indirect call through a function pointer read from that same attacker-influenced memory — a write plus control-flow-hijack primitive, not a mere refcount imbalance.\nA:H - In the common case the wild pointer lands in an unmapped or PAN/SMAP-protected page and the `refcount_dec_and_test()` faults, producing an immediate kernel oops that kills the task and leaks the job/submitqueue state; an unprivileged user can trigger this at will, and with `panic_on_oops` (common on Android and hardened builds) it is a full system panic."
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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/gpu/drm/msm/msm_gem_vma.c"
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],
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"versions": [
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{
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"version": "2e6a8a1fe2b262a6dfd0a65041fcd830ee1e7143",
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"lessThan": "2b512909a291a964cfcf6b58de13256ab3e848c4",
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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": "2e6a8a1fe2b262a6dfd0a65041fcd830ee1e7143",
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"lessThan": "278f8904434aa96055e793936b5977c010549e28",
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"status": "affected",
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"versionType": "git"
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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/gpu/drm/msm/msm_gem_vma.c"
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],
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"versions": [
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{
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"version": "6.17",
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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": "6.17",
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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": "6.17.3",
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"lessThanOrEqual": "6.17.*",
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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",
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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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"negate": false,
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"cpeMatch": [
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.17",
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"versionEndExcluding": "6.17.3"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.17",
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"versionEndExcluding": "6.18"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/2b512909a291a964cfcf6b58de13256ab3e848c4"
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},
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{
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"url": "https://git.kernel.org/stable/c/278f8904434aa96055e793936b5977c010549e28"
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}
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],
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"title": "drm/msm: Fix obj leak in VM_BIND error path",
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"x_generator": {
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