{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2022-50491", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2022-50491", "idYear": 2022, "status": "PUBLISHED", "publishedAt": "2025-10-04T15:43:44.470Z", "updatedAt": "2026-05-11T19:20:30.117Z", "importedAt": "2026-10-24T01:56:49.724Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "coresight: cti: Fix hang in cti_disable_hw()", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\ncoresight: cti: Fix hang in cti_disable_hw()\n\ncti_enable_hw() and cti_disable_hw() are called from an atomic context\nso shouldn't use runtime PM because it can result in a sleep when\ncommunicating with firmware.\n\nSince commit 3c6656337852 (\"Revert \"firmware: arm_scmi: Add clock\nmanagement to the SCMI power domain\"\"), this causes a hang on Juno when\nrunning the Perf Coresight tests or running this command:\n\n perf record -e cs_etm//u -- ls\n\nThis was also missed until the revert commit because pm_runtime_put()\nwas called with the wrong device until commit 692c9a499b28 (\"coresight:\ncti: Correct the parameter for pm_runtime_put\")\n\nWith lock and scheduler debugging enabled the following is output:\n\n coresight cti_sys0: cti_enable_hw -- dev:cti_sys0 parent: 20020000.cti\n BUG: sleeping function called from invalid context at drivers/base/power/runtime.c:1151\n in_atomic(): 1, irqs_disabled(): 128, non_block: 0, pid: 330, name: perf-exec\n preempt_count: 2, expected: 0\n RCU nest depth: 0, expected: 0\n INFO: lockdep is turned off.\n irq event stamp: 0\n hardirqs last enabled at (0): [<0000000000000000>] 0x0\n hardirqs last disabled at (0): [] copy_process+0xa0c/0x1948\n softirqs last enabled at (0): [] copy_process+0xa0c/0x1948\n softirqs last disabled at (0): [<0000000000000000>] 0x0\n CPU: 3 PID: 330 Comm: perf-exec Not tainted 6.0.0-00053-g042116d99298 #7\n Hardware name: ARM LTD ARM Juno Development Platform/ARM Juno Development Platform, BIOS EDK II Sep 13 2022\n Call trace:\n dump_backtrace+0x134/0x140\n show_stack+0x20/0x58\n dump_stack_lvl+0x8c/0xb8\n dump_stack+0x18/0x34\n __might_resched+0x180/0x228\n __might_sleep+0x50/0x88\n __pm_runtime_resume+0xac/0xb0\n cti_enable+0x44/0x120\n coresight_control_assoc_ectdev+0xc0/0x150\n coresight_enable_path+0xb4/0x288\n etm_event_start+0x138/0x170\n etm_event_add+0x48/0x70\n event_sched_in.isra.122+0xb4/0x280\n merge_sched_in+0x1fc/0x3d0\n visit_groups_merge.constprop.137+0x16c/0x4b0\n ctx_sched_in+0x114/0x1f0\n perf_event_sched_in+0x60/0x90\n ctx_resched+0x68/0xb0\n perf_event_exec+0x138/0x508\n begin_new_exec+0x52c/0xd40\n load_elf_binary+0x6b8/0x17d0\n bprm_execve+0x360/0x7f8\n do_execveat_common.isra.47+0x218/0x238\n __arm64_sys_execve+0x48/0x60\n invoke_syscall+0x4c/0x110\n el0_svc_common.constprop.4+0xfc/0x120\n do_el0_svc+0x34/0xc0\n el0_svc+0x40/0x98\n el0t_64_sync_handler+0x98/0xc0\n el0t_64_sync+0x170/0x174\n\nFix the issue by removing the runtime PM calls completely. They are not\nneeded here because it must have already been done when building the\npath for a trace.\n\n[ Fix build warnings ]", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "835d722ba10ac924adba1e8a46f2d80955222b4b", "status": "affected", "versionType": "git", "lessThan": "e33ce54cef5d429430e3b1ae5c8ee4f4103c4fdc" }, { "version": "835d722ba10ac924adba1e8a46f2d80955222b4b", "status": "affected", "versionType": "git", "lessThan": "4c365a0c21aaf2b8fcc88de8dc298803288f61ac" }, { "version": "835d722ba10ac924adba1e8a46f2d80955222b4b", "status": "affected", "versionType": "git", "lessThan": "c51cfba50df8b9e16bfe0e6d4f2f252a4a10063d" }, { "version": "835d722ba10ac924adba1e8a46f2d80955222b4b", "status": "affected", "versionType": "git", "lessThan": "6746eae4bbaddcc16b40efb33dab79210828b3ce" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "5.7", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "5.7" }, { "version": "5.10.154", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.77", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.0.7", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.0.*" }, { "version": "6.1", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }