CVE-2022-50518

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2022-50518", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-10-07T15:15:38.662Z", "datePublished": "2025-10-07T15:19:13.040Z", "dateUpdated": "2026-08-05T08:59:02.991Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:59:02.991Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nparisc: Fix locking in pdc_iodc_print() firmware call\n\nUtilize pdc_lock spinlock to protect parallel modifications of the\niodc_dbuf[] buffer, check length to prevent buffer overflow of\niodc_dbuf[], drop the iodc_retbuf[] buffer and fix some wrong\nindentings."}], "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 vulnerable code is reached through local console paths on parisc\u2014most severely via write(2) to the PDC console TTY (/dev/ttyB) which calls pdc_console_tty_write \u2192 pdc_iodc_print, or via local printk/earlycon output\u2014not via network packet processing.\nAC:L - An attacker who can write to the PDC console TTY can reliably overflow iodc_dbuf by sending a payload larger than 4096 bytes without newlines; write_room advertises 32768 with no chunking limit, so no attacker-independent conditions are required.\nPR:L - Exploitation needs only an unprivileged local principal able to open/write the PDC console device (e.g., a user logged in on ttyB0 under CONFIG_PDC_CONSOLE, or otherwise permitted access to that TTY)\u2014not real root or init-namespace admin capabilities.\nUI:N - No separate victim action is required; the attacker triggers the overflow directly by writing to the console TTY (or otherwise inducing console output on the vulnerable path).\nS:U - Impact stays within the host kernel\u2019s authority (local memory corruption / privilege escalation on the same system); this is not a VM escape, IOMMU bypass, or other cross-authority boundary crossing.\nC:H - Attacker-controlled out-of-bounds writes into the kernel BSS buffer iodc_dbuf can corrupt adjacent kernel state and are reasonably leveraged for arbitrary read primitives, so confidentiality impact is High under kernel memory-corruption guidance.\nI:H - The same attacker-controlled BSS overflow enables corruption of kernel data and plausible control-flow hijacking / arbitrary write primitives, so integrity impact is High.\nA:H - The overflow and related unlocked concurrent use of iodc_dbuf can cause kernel oops/panic or otherwise crash the system, yielding High availability impact."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/parisc/kernel/firmware.c"], "versions": [{"version": "ef1afd4d79f0479960ff36bb5fe6ec6eba1ebff2", "lessThan": "04a603058e70b8b881bb7860b8bd649f931f2591", "status": "affected", "versionType": "git"}, {"version": "ef1afd4d79f0479960ff36bb5fe6ec6eba1ebff2", "lessThan": "553bc5890ed96a8d006224c3a4673c47fee0d12a", "status": "affected", "versionType": "git"}, {"version": "ef1afd4d79f0479960ff36bb5fe6ec6eba1ebff2", "lessThan": "7236aae5f81f3efbd93d0601e74fc05994bc2580", "status": "affected", "versionType": "git"}, {"version": "24319896af06b84f965bcefa0f2d926b726ed05b", "status": "affected", "versionType": "git"}, {"version": "2.6.24.5", "lessThan": "2.6.25", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/parisc/kernel/firmware.c"], "versions": [{"version": "2.6.25", "status": "affected"}, {"version": "0", "lessThan": "2.6.25", "status": "unaffected", "versionType": "semver"}, {"version": "6.0.18", "lessThanOrEqual": "6.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.4", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.2", "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": "2.6.25", "versionEndExcluding": "6.0.18"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.25", "versionEndExcluding": "6.1.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.25", "versionEndExcluding": "6.2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.24.5"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/04a603058e70b8b881bb7860b8bd649f931f2591"}, {"url": "https://git.kernel.org/stable/c/553bc5890ed96a8d006224c3a4673c47fee0d12a"}, {"url": "https://git.kernel.org/stable/c/7236aae5f81f3efbd93d0601e74fc05994bc2580"}], "title": "parisc: Fix locking in pdc_iodc_print() firmware call", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["arch/parisc/kernel/firmware.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "04a603058e70b8b881bb7860b8bd649f931f2591", "status": "affected", "version": "ef1afd4d79f0479960ff36bb5fe6ec6eba1ebff2", "versionType": "git"}, {"lessThan": "553bc5890ed96a8d006224c3a4673c47fee0d12a", "status": "affected", "version": "ef1afd4d79f0479960ff36bb5fe6ec6eba1ebff2", "versionType": "git"}, {"lessThan": "7236aae5f81f3efbd93d0601e74fc05994bc2580", "status": "affected", "version": "ef1afd4d79f0479960ff36bb5fe6ec6eba1ebff2", "versionType": "git"}, {"status": "affected", "version": "24319896af06b84f965bcefa0f2d926b726ed05b", "versionType": "git"}, {"lessThan": "2.6.25", "status": "affected", "version": "2.6.24.5", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["arch/parisc/kernel/firmware.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "2.6.25"}, {"lessThan": "2.6.25", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.0.*", "status": "unaffected", "version": "6.0.18", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.2", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "C0B10599-742F-4EF6-AEFE-B18D086B8D98", "versionEndExcluding": "2.6.25", "versionStartIncluding": "2.6.24.5", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "0EDD14E2-11C7-45F3-BCB5-77CFF5314663", "versionEndExcluding": "6.0.18", "versionStartIncluding": "2.6.25.1", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "BC4189D9-5478-4E88-A78D-9C1DE29B217C", "versionEndExcluding": "6.1.4", "versionStartIncluding": "6.1", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:2.6.25:-:*:*:*:*:*:*", "matchCriteriaId": "F650D09A-41EA-4EB5-925B-F2146E8DDF2A", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:2.6.25:rc6:*:*:*:*:*:*", "matchCriteriaId": "00763CAF-AEF8-4EF1-9393-DEFF9697D382", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:2.6.25:rc7:*:*:*:*:*:*", "matchCriteriaId": "2D5310FC-8432-4BBF-8174-60F7B8A608B0", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:2.6.25:rc8:*:*:*:*:*:*", "matchCriteriaId": "4254F56E-6BA0-45DD-95D1-61A7C8AF7BA8", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:2.6.25:rc9:*:*:*:*:*:*", "matchCriteriaId": "8957EE27-E19A-4DE6-B46D-FE413E88BD93", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nparisc: Fix locking in pdc_iodc_print() firmware call\n\nUtilize pdc_lock spinlock to protect parallel modifications of the\niodc_dbuf[] buffer, check length to prevent buffer overflow of\niodc_dbuf[], drop the iodc_retbuf[] buffer and fix some wrong\nindentings."}], "id": "CVE-2022-50518", "lastModified": "2026-08-04T10:18:18.823", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2025-10-07T16:15:35.490", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/04a603058e70b8b881bb7860b8bd649f931f2591"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/553bc5890ed96a8d006224c3a4673c47fee0d12a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/7236aae5f81f3efbd93d0601e74fc05994bc2580"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-667"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: parisc: Fix locking in pdc_iodc_print() firmware call", "id": "2402294", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2402294"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "details": ["No description is available for this CVE."], "name": "CVE-2022-50518", "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:rhivos:1", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat In-Vehicle Operating System 1"}], "public_date": "2025-10-07T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-50518\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-50518\nhttps://lore.kernel.org/linux-cve-announce/2025100703-CVE-2022-50518-0bf9@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-10-08T13:36:51.812064+00:00", "updated": "2025-10-08T13:36:51.812099+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}