201 lines
10 KiB
JSON
201 lines
10 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-2022-49950",
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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": "2025-06-18T10:57:27.382Z",
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"datePublished": "2025-06-18T11:00:13.985Z",
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"dateUpdated": "2026-08-05T08:56:51.450Z"
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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": "2026-08-05T08:56:51.450Z"
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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\nmisc: fastrpc: fix memory corruption on open\n\nThe probe session-duplication overflow check incremented the session\ncount also when there were no more available sessions so that memory\nbeyond the fixed-size slab-allocated session array could be corrupted in\nfastrpc_session_alloc() on open()."
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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 - Triggered by opening the local miscdevice `/dev/fastrpc-*`, which calls fastrpc_device_open → fastrpc_session_alloc; not reachable via network packets or adjacent-link protocols.\nAC:L - Once sesscount is inflated past FASTRPC_MAX_SESSIONS (realistic on Qualcomm platforms such as SC8280XP with 14 CDSP context banks, or DTs using qcom,nsessions duplication), opening the device reliably drives the out-of-bounds session array walk with no attacker-uncontrollable race.\nPR:L - fastrpc_device_open has no capability check; on the primary deployments (Android/Qualcomm devices) non-root processes in the fastrpc/system groups can open the node and hit the vulnerable path.\nUI:N - Exploitation requires only that the attacker open the fastrpc device node; no separate victim action is needed.\nS:U - Corruption is confined to kernel memory in the same host OS authority (local privilege escalation), with no VM/IOMMU boundary crossed.\nC:H - Out-of-bounds reads of adjacent channel_ctx fields (lock/idr/list pointers) and heap corruption from an OOB write can be leveraged for arbitrary kernel memory disclosure.\nI:H - Out-of-bounds write into the spinlock, idr, and users list immediately following the session array enables classic kernel heap/list corruption primitives for arbitrary write and control-flow hijacking.\nA:H - Corrupting the channel spinlock, idr, or list_head reliably causes kernel oops/panic or hangs when those structures are subsequently used."
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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/misc/fastrpc.c"
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],
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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/misc/fastrpc.c"
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],
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"versions": [
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{
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"version": "5.1",
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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": "5.1",
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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": "5.4.213",
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"lessThanOrEqual": "5.4.*",
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"status": "unaffected",
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},
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{
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},
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{
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"version": "5.15.66",
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"lessThanOrEqual": "5.15.*",
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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": "5.19.8",
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"lessThanOrEqual": "5.19.*",
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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": "6.0",
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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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"references": [
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"url": "https://git.kernel.org/stable/c/f8632b8bb53ebc005d8f24a68a0c1f9678c0e908"
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"url": "https://git.kernel.org/stable/c/e0578e603065f120a8759b75e0d6c216c7078a39"
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{
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"url": "https://git.kernel.org/stable/c/d245f43aab2b61195d8ebb64cef7b5a08c590ab4"
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}
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],
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"title": "misc: fastrpc: fix memory corruption on open",
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