{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2022-49410", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-02-26T02:08:31.567Z", "datePublished": "2025-02-26T02:12:33.124Z", "dateUpdated": "2026-08-05T08:55:04.239Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:55:04.239Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Fix potential double free in create_var_ref()\n\nIn create_var_ref(), init_var_ref() is called to initialize the fields\nof variable ref_field, which is allocated in the previous function call\nto create_hist_field(). Function init_var_ref() allocates the\ncorresponding fields such as ref_field->system, but frees these fields\nwhen the function encounters an error. The caller later calls\ndestroy_hist_field() to conduct error handling, which frees the fields\nand the variable itself. This results in double free of the fields which\nare already freed in the previous function.\n\nFix this by storing NULL to the corresponding fields when they are freed\nin init_var_ref()." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The bug is reached only by writing a histogram trigger command to a local tracefs event trigger file (e.g. /sys/kernel/tracing/events/.../trigger) via write(); there is no network, adjacent, or physical attack path into create_var_ref()/init_var_ref().\nAC:L - An attacker who can write hist triggers fully controls the var-ref/alias command text and can induce the mid-function kstrdup() failure (e.g. memory pressure or large prior hist allocations); no race or victim-controlled state is required.\nPR:L - Trigger writes are gated only by tracefs DAC and LOCKDOWN_TRACEFS (no capable() check), and reasonable deployments (Android traced/readtracefs, ChromeOS, gid=-mounted tracing groups) deliberately grant non-root write access to this same hist-trigger path.\nUI:N - The attacker triggers the bug solely by writing the hist trigger configuration themselves; no separate victim action is required.\nS:U - A kernel heap double-free affects only the local kernel/system security authority and does not cross a VM, IOMMU, or sandbox boundary.\nC:H - Double-free of heap strings (system/event_name/name) enables UAF-style reuse of the freed objects, which can be leveraged for arbitrary kernel memory disclosure.\nI:H - The same double-free/UAF primitive enables heap shaping and arbitrary write or control-flow hijacking in the kernel.\nA:H - A double-free in kernel allocator paths can oops/panic the kernel even when not fully exploited for code execution." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "kernel/trace/trace_events_hist.c" ], "versions": [ { "version": "067fe038e70f6e64960d26a79c4df5f1413d0f13", "lessThan": "f8b383f83cb573152c577eca1ef101e89995b72a", "status": "affected", "versionType": "git" }, { "version": "067fe038e70f6e64960d26a79c4df5f1413d0f13", "lessThan": "c27f744ceefadc7bbeb14233b6abc150ced617d2", "status": "affected", "versionType": "git" }, { "version": "067fe038e70f6e64960d26a79c4df5f1413d0f13", "lessThan": "058cb6d86b9789377216c936506b346aaa1eb581", "status": "affected", "versionType": "git" }, { "version": "067fe038e70f6e64960d26a79c4df5f1413d0f13", "lessThan": "37443b3508b8cce6832f8d25cb4550b2f7801f50", "status": "affected", "versionType": "git" }, { "version": "067fe038e70f6e64960d26a79c4df5f1413d0f13", "lessThan": "4fdfb15e08598711dbf50daf56a33965232daf0e", "status": "affected", "versionType": "git" }, { "version": "067fe038e70f6e64960d26a79c4df5f1413d0f13", "lessThan": "bd83ff3bbfb003832481c9bff999d12385f396ae", "status": "affected", "versionType": "git" }, { "version": "067fe038e70f6e64960d26a79c4df5f1413d0f13", "lessThan": "99696a2592bca641eb88cc9a80c90e591afebd0f", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "kernel/trace/trace_events_hist.c" ], "versions": [ { "version": "4.17", "status": "affected" }, { "version": "0", "lessThan": "4.17", "status": "unaffected", "versionType": "semver" }, { "version": "4.19.247", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.198", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.121", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.46", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.17.14", "lessThanOrEqual": "5.17.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.18.3", "lessThanOrEqual": "5.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.19", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "4.19.247" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "5.4.198" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "5.10.121" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "5.15.46" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "5.17.14" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "5.18.3" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "5.19" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/f8b383f83cb573152c577eca1ef101e89995b72a" }, { "url": "https://git.kernel.org/stable/c/c27f744ceefadc7bbeb14233b6abc150ced617d2" }, { "url": "https://git.kernel.org/stable/c/058cb6d86b9789377216c936506b346aaa1eb581" }, { "url": "https://git.kernel.org/stable/c/37443b3508b8cce6832f8d25cb4550b2f7801f50" }, { "url": "https://git.kernel.org/stable/c/4fdfb15e08598711dbf50daf56a33965232daf0e" }, { "url": "https://git.kernel.org/stable/c/bd83ff3bbfb003832481c9bff999d12385f396ae" }, { "url": "https://git.kernel.org/stable/c/99696a2592bca641eb88cc9a80c90e591afebd0f" } ], "title": "tracing: Fix potential double free in create_var_ref()", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "cvssV3_1": { "scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH" } }, { "other": { "type": "ssvc", "content": { "id": "CVE-2022-49410", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "version": "2.0.3", "timestamp": "2025-10-01T19:41:12.408852Z" } } } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "type": "CWE", "cweId": "CWE-415", "description": "CWE-415 Double Free" } ] } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-10-01T19:46:50.147Z" } } ] } }