194 lines
9.5 KiB
JSON
194 lines
9.5 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-2021-47081",
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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": "2024-02-29T22:33:44.298Z",
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"datePublished": "2024-03-01T21:15:16.684Z",
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"dateUpdated": "2026-08-05T08:45:52.781Z"
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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": "2026-08-05T08:45:52.781Z"
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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\nhabanalabs/gaudi: Fix a potential use after free in gaudi_memset_device_memory\n\nOur code analyzer reported a uaf.\n\nIn gaudi_memset_device_memory, cb is get via hl_cb_kernel_create()\nwith 2 refcount.\nIf hl_cs_allocate_job() failed, the execution runs into release_cb\nbranch. One ref of cb is dropped by hl_cb_put(cb) and could be freed\nif other thread also drops one ref. Then cb is used by cb->id later,\nwhich is a potential uaf.\n\nMy patch add a variable 'id' to accept the value of cb->id before the\nhl_cb_put(cb) is called, to avoid the potential uaf."
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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 vulnerable path is reached by opening and closing the local HabanaLabs char device (/dev/hl*), which triggers context release, memory scrubbing, and gaudi_memset_device_memory; it is not reachable via network packets.\nAC:L - An attacker who can open the device reliably drives the put-then-use-id cleanup on every scrub/memset invocation, and use-after-free races of this kind are treated as attacker-influencible rather than requiring uncontrollable conditions.\nPR:L - hl_device_open performs no capability check, and Gaudi device nodes are routinely granted to unprivileged users via udev group/world permissions in real deployments, matching other scored habanalabs CVEs.\nUI:N - The attacker triggers the bug solely by opening and closing the device themselves; no separate victim action is required.\nS:U - Impact is confined to the host kernel authority (local privilege escalation / memory corruption); there is no VM, IOMMU, or other security-authority boundary crossed.\nC:H - This is a use-after-free on a kernel command-buffer object; UAF enables heap reuse and disclosure of freed object contents, so confidentiality impact is High.\nI:H - Use-after-free of the CB object can be turned into heap spray and arbitrary write / control-flow hijacking primitives, so integrity impact is High.\nA:H - Use-after-free of kernel memory can cause kernel oops/panic or device-driver failure, yielding High availability impact."
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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/habanalabs/gaudi/gaudi.c"
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],
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"versions": [
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{
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"version": "423815bf02e257091d5337be5c63b57fc29e4254",
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"lessThan": "b49f5af30b0e4064fbd91e83823a4bfcb2c7a3e7",
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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": "423815bf02e257091d5337be5c63b57fc29e4254",
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"lessThan": "115726c5d312b462c9d9931ea42becdfa838a076",
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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/misc/habanalabs/gaudi/gaudi.c"
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],
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"versions": [
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{
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"version": "5.12",
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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": "5.12",
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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": "5.12.7",
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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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{
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"nodes": [
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"operator": "OR",
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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": "5.12",
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"versionEndExcluding": "5.12.7"
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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": "5.12",
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/b49f5af30b0e4064fbd91e83823a4bfcb2c7a3e7"
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},
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{
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"url": "https://git.kernel.org/stable/c/115726c5d312b462c9d9931ea42becdfa838a076"
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}
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],
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"title": "habanalabs/gaudi: Fix a potential use after free in gaudi_memset_device_memory",
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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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"title": "CISA ADP Vulnrichment",
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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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"id": "CVE-2021-47081",
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"role": "CISA Coordinator",
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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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"version": "2.0.3",
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"timestamp": "2024-03-04T19:32:29.244809Z"
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}
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}
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"shortName": "CISA-ADP",
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"dateUpdated": "2024-06-04T17:14:15.058Z"
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"dateUpdated": "2024-08-04T05:24:39.774Z"
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"title": "CVE Program Container",
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"references": [
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"url": "https://git.kernel.org/stable/c/b49f5af30b0e4064fbd91e83823a4bfcb2c7a3e7",
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