226 lines
11 KiB
JSON
226 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-2022-48921",
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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": "2024-08-21T06:06:23.295Z",
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"datePublished": "2024-08-22T01:32:53.131Z",
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"dateUpdated": "2026-05-23T15:21:05.775Z"
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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": "2026-05-23T15:21:05.775Z"
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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\nsched/fair: Fix fault in reweight_entity\n\nSyzbot found a GPF in reweight_entity. This has been bisected to\ncommit 4ef0c5c6b5ba (\"kernel/sched: Fix sched_fork() access an invalid\nsched_task_group\")\n\nThere is a race between sched_post_fork() and setpriority(PRIO_PGRP)\nwithin a thread group that causes a null-ptr-deref in\nreweight_entity() in CFS. The scenario is that the main process spawns\nnumber of new threads, which then call setpriority(PRIO_PGRP, 0, -20),\nwait, and exit. For each of the new threads the copy_process() gets\ninvoked, which adds the new task_struct and calls sched_post_fork()\nfor it.\n\nIn the above scenario there is a possibility that\nsetpriority(PRIO_PGRP) and set_one_prio() will be called for a thread\nin the group that is just being created by copy_process(), and for\nwhich the sched_post_fork() has not been executed yet. This will\ntrigger a null pointer dereference in reweight_entity(), as it will\ntry to access the run queue pointer, which hasn't been set.\n\nBefore the mentioned change the cfs_rq pointer for the task has been\nset in sched_fork(), which is called much earlier in copy_process(),\nbefore the new task is added to the thread_group. Now it is done in\nthe sched_post_fork(), which is called after that. To fix the issue\nthe remove the update_load param from the update_load param() function\nand call reweight_task() only if the task flag doesn't have the\nTASK_NEW flag set."
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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": "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/sched/core.c"
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],
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"versions": [
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"lessThan": "8f317cd888059c59e2fa924bf4b0957cfa53f78e",
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"status": "affected",
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"versionType": "git"
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"lessThan": "13765de8148f71fa795e0a6607de37c49ea5915a",
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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": "25d40b828fb855ee62e1039c65a666c9afd60786",
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"status": "affected",
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},
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{
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"version": "5.10.80",
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"lessThan": "5.10.137",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "5.15.3",
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"lessThan": "5.15.27",
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"status": "affected",
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},
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{
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"version": "5.14.19",
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"lessThan": "5.15",
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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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"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/sched/core.c"
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],
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"versions": [
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{
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"version": "5.16",
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"status": "affected"
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},
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"version": "0",
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},
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{
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"lessThanOrEqual": "5.10.*",
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},
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"version": "5.15.27",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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},
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{
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"version": "5.16.13",
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"lessThanOrEqual": "5.16.*",
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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": "5.17",
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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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"versionStartIncluding": "5.10.80",
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/8f317cd888059c59e2fa924bf4b0957cfa53f78e"
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},
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{
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"url": "https://git.kernel.org/stable/c/589a954daab5e18399860b6c8ffaeaf79844eb20"
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{
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"url": "https://git.kernel.org/stable/c/13765de8148f71fa795e0a6607de37c49ea5915a"
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}
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],
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"title": "sched/fair: Fix fault in reweight_entity",
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"adp": [
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{
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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-2022-48921",
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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": "2024-09-10T15:33:28.558357Z"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"shortName": "CISA-ADP",
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"dateUpdated": "2024-09-12T17:33:01.045Z"
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}
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}
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]
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}
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} |