221 lines
11 KiB
JSON
221 lines
11 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-2023-52704",
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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": "2024-03-07T14:49:46.891Z",
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"datePublished": "2024-05-21T15:22:53.343Z",
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"dateUpdated": "2026-08-05T09:11:05.098Z"
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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": "2026-08-05T09:11:05.098Z"
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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\nfreezer,umh: Fix call_usermode_helper_exec() vs SIGKILL\n\nTetsuo-San noted that commit f5d39b020809 (\"freezer,sched: Rewrite\ncore freezer logic\") broke call_usermodehelper_exec() for the KILLABLE\ncase.\n\nSpecifically it was missed that the second, unconditional,\nwait_for_completion() was not optional and ensures the on-stack\ncompletion is unused before going out-of-scope."
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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 bug is reachable only through call_usermodehelper_exec() with UMH_KILLABLE, used solely by request_module()/call_modprobe; an unprivileged local attacker triggers this via syscalls such as socket() that autoload net-pf-* modules, then sends SIGKILL to the waiting process.\nAC:L - The attacker controls both sides of the race by triggering request_module and delivering SIGKILL to their own process while it waits for modprobe, and can retry until umh_complete() completes the on-stack completion after the waiter has returned.\nPR:L - Module autoload via request_module() does not require CAP_SYS_MODULE; an ordinary unprivileged user can invoke it through socket() and many other unprivileged entry points with no elevated capabilities.\nUI:N - Exploitation requires no action from another user; the attacker alone triggers module autoload and signals their own process.\nS:U - Impact is confined to the local kernel's security authority (kernel memory corruption / privilege escalation); it does not cross a VM, IOMMU, or other security boundary.\nC:H - The bug is a use-after-free of an on-stack completion: umh_complete()/complete() operates on freed stack memory, which is memory corruption that can be leveraged for information disclosure under the UAF impact model.\nI:H - complete() writes to the freed stack completion (lock and done fields), corrupting the live or reused kernel stack and enabling control-flow hijacking / arbitrary integrity impact.\nA:H - The stack UAF causes kernel warnings/oopses (as seen in the syzbot lockdep crash in umh_complete) and can panic or hang the system."
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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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"kernel/umh.c"
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],
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"versions": [
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{
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"version": "f5d39b020809146cc28e6e73369bf8065e0310aa",
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"lessThan": "7f9f6c54da876b3f0bece2b569456ceb96965ed7",
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"status": "affected",
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"versionType": "git"
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},
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{
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"lessThan": "eedeb787ebb53de5c5dcf7b7b39d01bf1b0f037d",
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"status": "affected",
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}
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},
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{
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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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"kernel/umh.c"
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],
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"versions": [
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{
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"version": "6.1",
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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": "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": "6.1.13",
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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": "6.2",
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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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{
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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": "6.1",
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"versionEndExcluding": "6.1.13"
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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": "6.1",
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"references": [
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"url": "https://git.kernel.org/stable/c/7f9f6c54da876b3f0bece2b569456ceb96965ed7"
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"url": "https://git.kernel.org/stable/c/eedeb787ebb53de5c5dcf7b7b39d01bf1b0f037d"
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}
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],
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"title": "freezer,umh: Fix call_usermode_helper_exec() vs SIGKILL",
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"x_generator": {
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"engine": "bippy-1.2.0"
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"problemTypes": [
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{
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"descriptions": [
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{
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"type": "CWE",
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"lang": "en",
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"description": "CWE-noinfo Not enough information"
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"metrics": [
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{
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"baseScore": 5.5,
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"attackVector": "LOCAL",
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"baseSeverity": "MEDIUM",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
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"integrityImpact": "NONE",
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"userInteraction": "NONE",
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"attackComplexity": "LOW",
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"availabilityImpact": "HIGH",
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"privilegesRequired": "LOW",
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"confidentialityImpact": "NONE"
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},
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{
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"other": {
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"type": "ssvc",
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"content": {
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"timestamp": "2024-05-29T17:51:26.143724Z",
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"id": "CVE-2023-52704",
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"options": [
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{
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"Exploitation": "none"
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"dateUpdated": "2024-10-31T20:11:31.465Z"
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"dateUpdated": "2024-08-02T23:11:35.365Z"
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"title": "CVE Program Container",
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