CVE-2022-50206

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Another mutex is\nused to protect against the current_mode update but not for retrieving\ninsn_emulation as table->data is no longer changing."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/arm64/kernel/armv8_deprecated.c"], "versions": [{"version": "587064b610c703f259317d00dc37bf6d40f4fc74", "lessThan": "9d5fec6ba2e4117d196a8259ab54615ffe562460", "status": "affected", "versionType": "git"}, {"version": "587064b610c703f259317d00dc37bf6d40f4fc74", "lessThan": "b51881b1da57fe9877125dfdd0aac5172958fcfd", "status": "affected", "versionType": "git"}, {"version": "587064b610c703f259317d00dc37bf6d40f4fc74", "lessThan": "04549063d5701976034d8c2bfda3d3a8cbf0409f", "status": "affected", "versionType": "git"}, {"version": "587064b610c703f259317d00dc37bf6d40f4fc74", "lessThan": "353b4673d01c512303c45cf2346f630cda73b5c9", "status": "affected", "versionType": "git"}, {"version": "587064b610c703f259317d00dc37bf6d40f4fc74", "lessThan": "cc69ef95988b9ef2fc730ec452a7441efb90ef5e", "status": "affected", "versionType": "git"}, {"version": "587064b610c703f259317d00dc37bf6d40f4fc74", "lessThan": "6a2fd114678d7fc1b5a0f8865ae98f1c17787455", "status": "affected", "versionType": "git"}, {"version": "587064b610c703f259317d00dc37bf6d40f4fc74", "lessThan": "07022e07017ee5540f5559b0aeb916e8383c1e1a", "status": "affected", "versionType": "git"}, {"version": "587064b610c703f259317d00dc37bf6d40f4fc74", "lessThan": "af483947d472eccb79e42059276c4deed76f99a6", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/arm64/kernel/armv8_deprecated.c"], "versions": [{"version": "3.19", "status": "affected"}, {"version": "0", "lessThan": "3.19", "status": "unaffected", "versionType": "semver"}, {"version": "4.14.291", "lessThanOrEqual": "4.14.*", "status": "unaffected", "versionType": "semver"}, {"version": "4.19.256", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.4.211", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.137", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.61", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.18.18", "lessThanOrEqual": "5.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.19.2", "lessThanOrEqual": "5.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.0", "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": "3.19", "versionEndExcluding": "4.14.291"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.19", "versionEndExcluding": "4.19.256"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.19", "versionEndExcluding": "5.4.211"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.19", "versionEndExcluding": "5.10.137"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.19", "versionEndExcluding": "5.15.61"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.19", "versionEndExcluding": "5.18.18"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.19", "versionEndExcluding": "5.19.2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.19", "versionEndExcluding": "6.0"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/9d5fec6ba2e4117d196a8259ab54615ffe562460"}, {"url": "https://git.kernel.org/stable/c/b51881b1da57fe9877125dfdd0aac5172958fcfd"}, {"url": "https://git.kernel.org/stable/c/04549063d5701976034d8c2bfda3d3a8cbf0409f"}, {"url": "https://git.kernel.org/stable/c/353b4673d01c512303c45cf2346f630cda73b5c9"}, {"url": "https://git.kernel.org/stable/c/cc69ef95988b9ef2fc730ec452a7441efb90ef5e"}, {"url": "https://git.kernel.org/stable/c/6a2fd114678d7fc1b5a0f8865ae98f1c17787455"}, {"url": "https://git.kernel.org/stable/c/07022e07017ee5540f5559b0aeb916e8383c1e1a"}, {"url": "https://git.kernel.org/stable/c/af483947d472eccb79e42059276c4deed76f99a6"}], "title": "arm64: fix oops in concurrently setting insn_emulation sysctls", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"lessThanOrEqual": "4.19.*", "status": "unaffected", "version": "4.19.256", "versionType": "semver"}, {"lessThanOrEqual": "5.4.*", "status": "unaffected", "version": "5.4.211", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.137", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.61", "versionType": "semver"}, {"lessThanOrEqual": "5.18.*", "status": "unaffected", "version": "5.18.18", "versionType": "semver"}, {"lessThanOrEqual": "5.19.*", "status": "unaffected", "version": "5.19.2", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.0", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "88A26BF4-5BF4-43C0-A877-29781159FCB0", "versionEndExcluding": "4.14.291", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "6C47CDE3-B039-4AE5-B8E4-1DC820E473FF", "versionEndExcluding": "4.19.256", "versionStartIncluding": "4.15", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "B1C63D19-C08C-4308-A848-B2523C9275BD", "versionEndExcluding": "5.4.211", "versionStartIncluding": "4.20", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "C2BF720F-C5EE-4DE2-9BDF-CE4CFBC767F4", "versionEndExcluding": "5.10.137", "versionStartIncluding": "5.5", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "51861563-7F40-460F-82CD-2D3FBDAD6618", "versionEndExcluding": "5.15.61", "versionStartIncluding": "5.11", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "5B42E453-8837-49D0-A5EF-03F818A6DC11", "versionEndExcluding": "5.18.18", "versionStartIncluding": "5.16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "A1A2A5A5-4598-4D7E-BA07-4660398D6C8F", "versionEndExcluding": "5.19.2", "versionStartIncluding": "5.19", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\narm64: fix oops in concurrently setting insn_emulation sysctls\n\nemulation_proc_handler() changes table->data for proc_dointvec_minmax\nand can generate the following Oops if called concurrently with itself:\n\n | Unable to handle kernel NULL pointer dereference at virtual address 0000000000000010\n | Internal error: Oops: 96000006 [#1] SMP\n | Call trace:\n | update_insn_emulation_mode+0xc0/0x148\n | emulation_proc_handler+0x64/0xb8\n | proc_sys_call_handler+0x9c/0xf8\n | proc_sys_write+0x18/0x20\n | __vfs_write+0x20/0x48\n | vfs_write+0xe4/0x1d0\n | ksys_write+0x70/0xf8\n | __arm64_sys_write+0x20/0x28\n | el0_svc_common.constprop.0+0x7c/0x1c0\n | el0_svc_handler+0x2c/0xa0\n | el0_svc+0x8/0x200\n\nTo fix this issue, keep the table->data as &insn->current_mode and\nuse container_of() to retrieve the insn pointer. Another mutex is\nused to protect against the current_mode update but not for retrieving\ninsn_emulation as table->data is no longer changing."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: arm64: se corrige el error al configurar simult\u00e1neamente sysctls emulation_proc_handler() de insn_emulation y cambia table->data para proc_dointvec_minmax, que puede generar el siguiente error si se llama simult\u00e1neamente consigo mismo: | No se puede controlar la desreferencia del puntero NULL del kernel en la direcci\u00f3n virtual 0000000000000010 | Error interno: Oops: 96000006 [#1] SMP | Rastreo de llamadas: | update_insn_emulation_mode+0xc0/0x148 | emulation_proc_handler+0x64/0xb8 | proc_sys_call_handler+0x9c/0xf8 | proc_sys_write+0x18/0x20 | __vfs_write+0x20/0x48 | Para solucionar este problema, mantenga la tabla->data como &insn->current_mode y use container_of() para recuperar el puntero insn. Se usa otro mutex para proteger contra la actualizaci\u00f3n de current_mode, pero no para recuperar la emulaci\u00f3n insn, ya que la tabla->data ya no cambia."}], "id": "CVE-2022-50206", "lastModified": "2026-08-15T13:17:30.803", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2025-06-18T11:15:51.390", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/04549063d5701976034d8c2bfda3d3a8cbf0409f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/07022e07017ee5540f5559b0aeb916e8383c1e1a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/353b4673d01c512303c45cf2346f630cda73b5c9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6a2fd114678d7fc1b5a0f8865ae98f1c17787455"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/9d5fec6ba2e4117d196a8259ab54615ffe562460"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/af483947d472eccb79e42059276c4deed76f99a6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b51881b1da57fe9877125dfdd0aac5172958fcfd"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/cc69ef95988b9ef2fc730ec452a7441efb90ef5e"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: arm64: fix oops in concurrently setting insn_emulation sysctls", "id": "2373544", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2373544"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\narm64: fix oops in concurrently setting insn_emulation sysctls\nemulation_proc_handler() changes table->data for proc_dointvec_minmax\nand can generate the following Oops if called concurrently with itself:\n| Unable to handle kernel NULL pointer dereference at virtual address 0000000000000010\n| Internal error: Oops: 96000006 [#1] SMP\n| Call trace:\n| update_insn_emulation_mode+0xc0/0x148\n| emulation_proc_handler+0x64/0xb8\n| proc_sys_call_handler+0x9c/0xf8\n| proc_sys_write+0x18/0x20\n| __vfs_write+0x20/0x48\n| vfs_write+0xe4/0x1d0\n| ksys_write+0x70/0xf8\n| __arm64_sys_write+0x20/0x28\n| el0_svc_common.constprop.0+0x7c/0x1c0\n| el0_svc_handler+0x2c/0xa0\n| el0_svc+0x8/0x200\nTo fix this issue, keep the table->data as &insn->current_mode and\nuse container_of() to retrieve the insn pointer. Another mutex is\nused to protect against the current_mode update but not for retrieving\ninsn_emulation as table->data is no longer changing."], "name": "CVE-2022-50206", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-06-18T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-50206\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-50206\nhttps://lore.kernel.org/linux-cve-announce/2025061842-CVE-2022-50206-24d2@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-06-23T08:45:29.025193+00:00", "updated": "2025-06-23T08:45:29.025256+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}