{"schemaVersion":3,"id":"CVE-2022-42331","aliases":["ALPINE-CVE-2022-42331","UBUNTU-CVE-2022-42331","DEBIAN-CVE-2022-42331"],"status":"published","duplicateOf":null,"title":null,"description":"x86: speculative vulnerability in 32bit SYSCALL path Due to an oversight in the very original Spectre/Meltdown security work (XSA-254), one entrypath performs its speculation-safety actions too late. In some configurations, there is an unprotected RET instruction which can be attacked with a variety of speculative attacks.","dates":{"published":"2023-03-21T00:00:00.000Z","modified":"2025-02-13T16:33:19.580Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":5.5,"severity":"medium","version":"3.1","versionLabel":"v3.1","source":"NVD","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"OSV · Alpine","score":5.5,"severity":"medium","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","exploitability":4.6,"impact":6,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Ubuntu","score":5.5,"severity":"medium","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","exploitability":4.6,"impact":6,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Debian","score":5.5,"severity":"medium","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","exploitability":4.6,"impact":6,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":5.5,"severity":"medium","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00276,"percentile":0.18774,"severity":"low","asOf":"2026-10-19T00:00:00.000Z","change":{"pp":0.003000000000000008,"baselineDate":"2026-09-19T00:00:00.000Z","baselineScore":0.00273},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00273,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00273,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00273,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00273,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00273,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00273,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00273,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00273,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00273,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00273,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00273,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00273,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00273,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00273,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00273,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00273,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00273,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00273,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00273,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00273,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00273,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00273,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00273,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00273,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00273,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00273,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00273,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00273,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00276,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00276,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00276,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00276,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00276,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00276,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00276,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00276,"percentile":0.18774}],"last30":[{"date":"2026-09-19T00:00:00.000Z","score":0.00273,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00273,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00273,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00273,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00273,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00273,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00273,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00273,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00273,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00273,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00273,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00273,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00273,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00273,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00273,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00273,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00273,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00273,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00273,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00273,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00273,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00273,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00273,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00276,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00276,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00276,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00276,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00276,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00276,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00276,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00276,"percentile":0.18774}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[],"affected":[{"vendor":"alpine","product":"xen","name":"xen","label":"xen","ecosystem":"Alpine Linux","cpePart":null,"purl":"pkg:apk/alpine/xen","purlType":"apk","versions":[{"text":"≥ 4.5.0, < 4.15.5-r0","noFixRecorded":false,"fixedIn":null},{"text":"≥ 4.5.0, < 4.16.4-r0","noFixRecorded":false,"fixedIn":null},{"text":"≥ 4.5.0, < 4.17.0-r5","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 4.5.0, < 4.15.5-r0 | ≥ 4.5.0, < 4.16.4-r0 | ≥ 4.5.0, < 4.17.0-r5","eol":null,"hubHref":null},{"vendor":"debian","product":"xen","name":"xen","label":"xen","ecosystem":"Debian","cpePart":null,"purl":"pkg:deb/debian/xen","purlType":"deb","versions":[{"text":"< 4.17.0+74-g3eac216e6e-1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 4.17.0+74-g3eac216e6e-1","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"xen","name":"xen","label":"xen","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/xen","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"fedoraproject","product":"fedora","name":"fedora","label":"fedora","ecosystem":null,"cpePart":"o","purl":null,"purlType":null,"versions":[{"text":"37","noFixRecorded":false,"fixedIn":null},{"text":"38","noFixRecorded":false,"fixedIn":null}],"versionsText":"37 | 38","eol":{"isEol":true,"eolDate":"2023-12-05T00:00:00.000Z","matchMethod":"cpe","cycle":{"name":"37","label":"37","eolFrom":"2023-12-05T00:00:00.000Z","isLts":false,"isMaintained":false,"latestVersion":null},"product":{"name":"fedora","label":"Fedora Linux","category":"os"}},"hubHref":"/vendor/fedoraproject/fedora"},{"vendor":"xen","product":"xen","name":"xen","label":"xen","ecosystem":null,"cpePart":"o","purl":null,"purlType":null,"versions":[{"text":"≥ 4.5.0, ≤ 4.17.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 4.5.0, ≤ 4.17.0","eol":null,"hubHref":"/vendor/xen/xen"}],"affectedCount":5,"eol":{"hasEol":true,"count":1},"references":[{"url":"https://xenbits.xenproject.org/xsa/advisory-429.txt","label":"xenbits.xenproject.org/xsa/advisory-429.txt","hostname":"xenbits.xenproject.org","tags":["REPORT","Vendor Advisory"]},{"url":"http://www.openwall.com/lists/oss-security/2023/03/21/3","label":"www.openwall.com/lists/oss-security/2023/03/21/3","hostname":"www.openwall.com","tags":["Mailing List","REPORT","Third Party Advisory"]},{"url":"http://xenbits.xen.org/xsa/advisory-429.html","label":"xenbits.xen.org/xsa/advisory-429.html","hostname":"xenbits.xen.org","tags":["REPORT","Vendor Advisory"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/APBMS2Q6746AXAFAITNJMGBNFGNMVLWR/","label":"lists.fedoraproject.org/archives/…","hostname":"lists.fedoraproject.org","tags":["Vendor Advisory","Mailing List","Third Party Advisory"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5L6PM4RE7MUE6OWA32ZVOXCP235RM2TM/","label":"lists.fedoraproject.org/archives/…","hostname":"lists.fedoraproject.org","tags":["Vendor Advisory","Mailing List","Third Party Advisory"]},{"url":"https://www.debian.org/security/2023/dsa-5378","label":"www.debian.org/security/2023/dsa-5378","hostname":"www.debian.org","tags":["Vendor Advisory","Third Party Advisory"]},{"url":"https://security.gentoo.org/glsa/202402-07","label":"security.gentoo.org/glsa/202402-07","hostname":"security.gentoo.org","tags":[]},{"url":"https://security.alpinelinux.org/vuln/CVE-2022-42331","label":"security.alpinelinux.org/vuln/CVE-2022-42331","hostname":"security.alpinelinux.org","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2022-42331","label":"ubuntu.com/security/CVE-2022-42331","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://www.openwall.com/lists/oss-security/2023/03/21/3","label":"www.openwall.com/lists/oss-security/2023/03/21/3","hostname":"www.openwall.com","tags":["REPORT"]},{"url":"https://xenbits.xen.org/xsa/advisory-429.html","label":"xenbits.xen.org/xsa/advisory-429.html","hostname":"xenbits.xen.org","tags":["REPORT"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2022-42331","label":"www.cve.org/CVERecord?id=CVE-2022-42331","hostname":"www.cve.org","tags":["REPORT"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2022-42331","label":"security-tracker.debian.org/tracker/CVE-2022-42331","hostname":"security-tracker.debian.org","tags":["Advisory"]}],"lineage":{"upstream":[],"downstream":["DSA-5378-1","OPENSUSE-SU-2024:12833-1","SUSE-SU-2023:0845-1","SUSE-SU-2023:0846-1","SUSE-SU-2023:0847-1","SUSE-SU-2023:0848-1","SUSE-SU-2023:0848-2","SUSE-SU-2023:0858-1","SUSE-SU-2023:0859-1","SUSE-SU-2023:0862-1"],"duplicates":[],"related":["OPENSUSE-SU-2024:12833-1","SUSE-SU-2023:0845-1","SUSE-SU-2023:0846-1","SUSE-SU-2023:0847-1","SUSE-SU-2023:0848-1","SUSE-SU-2023:0848-2","SUSE-SU-2023:0858-1","SUSE-SU-2023:0859-1","SUSE-SU-2023:0862-1"]},"timeline":[{"kind":"published","date":"2023-03-21T00:00:00.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2025-02-13T16:33:19.580Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":22,"level":"low","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T10:32:06.320Z","stale":false,"partial":false}}