{ "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-2022-49424", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2022-49424", "idYear": 2022, "status": "PUBLISHED", "publishedAt": "2025-02-26T02:12:46.209Z", "updatedAt": "2026-05-23T15:22:14.313Z", "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": "iommu/mediatek: Fix NULL pointer dereference when printing dev_name", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\niommu/mediatek: Fix NULL pointer dereference when printing dev_name\n\nWhen larbdev is NULL (in the case I hit, the node is incorrectly set\niommus = <&iommu NUM>), it will cause device_link_add() fail and\nkernel crashes when we try to print dev_name(larbdev).\n\nLet's fail the probe if a larbdev is NULL to avoid invalid inputs from\ndts.\n\nIt should work for normal correct setting and avoid the crash caused\nby my incorrect setting.\n\nError log:\n[ 18.189042][ T301] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000050\n...\n[ 18.344519][ T301] pstate: a0400005 (NzCv daif +PAN -UAO)\n[ 18.345213][ T301] pc : mtk_iommu_probe_device+0xf8/0x118 [mtk_iommu]\n[ 18.346050][ T301] lr : mtk_iommu_probe_device+0xd0/0x118 [mtk_iommu]\n[ 18.346884][ T301] sp : ffffffc00a5635e0\n[ 18.347392][ T301] x29: ffffffc00a5635e0 x28: ffffffd44a46c1d8\n[ 18.348156][ T301] x27: ffffff80c39a8000 x26: ffffffd44a80cc38\n[ 18.348917][ T301] x25: 0000000000000000 x24: ffffffd44a80cc38\n[ 18.349677][ T301] x23: ffffffd44e4da4c6 x22: ffffffd44a80cc38\n[ 18.350438][ T301] x21: ffffff80cecd1880 x20: 0000000000000000\n[ 18.351198][ T301] x19: ffffff80c439f010 x18: ffffffc00a50d0c0\n[ 18.351959][ T301] x17: ffffffffffffffff x16: 0000000000000004\n[ 18.352719][ T301] x15: 0000000000000004 x14: ffffffd44eb5d420\n[ 18.353480][ T301] x13: 0000000000000ad2 x12: 0000000000000003\n[ 18.354241][ T301] x11: 00000000fffffad2 x10: c0000000fffffad2\n[ 18.355003][ T301] x9 : a0d288d8d7142d00 x8 : a0d288d8d7142d00\n[ 18.355763][ T301] x7 : ffffffd44c2bc640 x6 : 0000000000000000\n[ 18.356524][ T301] x5 : 0000000000000080 x4 : 0000000000000001\n[ 18.357284][ T301] x3 : 0000000000000000 x2 : 0000000000000005\n[ 18.358045][ T301] x1 : 0000000000000000 x0 : 0000000000000000\n[ 18.360208][ T301] Hardware name: MT6873 (DT)\n[ 18.360771][ T301] Call trace:\n[ 18.361168][ T301] dump_backtrace+0xf8/0x1f0\n[ 18.361737][ T301] dump_stack_lvl+0xa8/0x11c\n[ 18.362305][ T301] dump_stack+0x1c/0x2c\n[ 18.362816][ T301] mrdump_common_die+0x184/0x40c [mrdump]\n[ 18.363575][ T301] ipanic_die+0x24/0x38 [mrdump]\n[ 18.364230][ T301] atomic_notifier_call_chain+0x128/0x2b8\n[ 18.364937][ T301] die+0x16c/0x568\n[ 18.365394][ T301] __do_kernel_fault+0x1e8/0x214\n[ 18.365402][ T301] do_page_fault+0xb8/0x678\n[ 18.366934][ T301] do_translation_fault+0x48/0x64\n[ 18.368645][ T301] do_mem_abort+0x68/0x148\n[ 18.368652][ T301] el1_abort+0x40/0x64\n[ 18.368660][ T301] el1h_64_sync_handler+0x54/0x88\n[ 18.368668][ T301] el1h_64_sync+0x68/0x6c\n[ 18.368673][ T301] mtk_iommu_probe_device+0xf8/0x118 [mtk_iommu]\n...", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "77fbe028d5a3f7fc6060c4454ead9510533acd1e", "status": "affected", "versionType": "git", "lessThan": "c3c2734e28d7fac50228c4d2b8896e8695adf304" }, { "version": "18ea450ed1b60c1bb336f5efe874f61909ce7bec", "status": "affected", "versionType": "git", "lessThan": "e9c63c0f73a1bbfd02624f5eae7e881df8b6830f" }, { "version": "635319a4a7444ca97124d781cd96deb277ff4d40", "status": "affected", "versionType": "git", "lessThan": "8837c2682b9b2eed83e6212bcf79850c593a6fee" }, { "version": "635319a4a7444ca97124d781cd96deb277ff4d40", "status": "affected", "versionType": "git", "lessThan": "de78657e16f41417da9332f09c2d67d100096939" }, { "version": "b7bf68272b6ae7c469854e2e054db1db1d158999", "status": "affected", "versionType": "git" }, { "version": "5.15.33", "status": "affected", "versionType": "semver", "lessThan": "5.15.46" }, { "version": "5.17.2", "status": "affected", "versionType": "semver", "lessThan": "5.17.14" }, { "version": "5.16.19", "status": "affected", "versionType": "semver", "lessThan": "5.17" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "5.18", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "5.18" }, { "version": "5.15.46", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "5.17.14", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.17.*" }, { "version": "5.18.3", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.18.*" }, { "version": "5.19", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }