{"schemaVersion":3,"id":"CVE-2023-34320","aliases":["ALPINE-CVE-2023-34320","UBUNTU-CVE-2023-34320","DEBIAN-CVE-2023-34320"],"status":"published","duplicateOf":null,"title":null,"description":"Cortex-A77 cores (r0p0 and r1p0) are affected by erratum 1508412\nwhere software, under certain circumstances, could deadlock a core\ndue to the execution of either a load to device or non-cacheable memory,\nand either a store exclusive or register read of the Physical\nAddress Register (PAR_EL1) in close proximity.","dates":{"published":"2023-12-08T20:54:06.993Z","modified":"2025-11-04T19:16:33.356Z","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:N/I:N/A:H","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:N/I:N/A:H","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:N/I:N/A:H","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:N/I:N/A:H","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:N/I:N/A:H","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00237,"percentile":0.13759,"severity":"low","asOf":"2026-10-20T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-20T00:00:00.000Z","baselineScore":0.00237},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00237,"percentile":0.13759}],"last30":[{"date":"2026-09-20T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00237,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00237,"percentile":0.13759}]},"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":[{"id":"CWE-667","name":"Improper Locking","description":"The product does not properly acquire or release a lock on a resource, leading to unexpected resource state changes and behaviors.","type":"weakness","status":"Draft","abstraction":"Class","likelihoodOfExploit":null,"url":"https://cwe.mitre.org/data/definitions/667.html"}],"affected":[{"vendor":"alpine","product":"xen","name":"xen","label":"xen","ecosystem":"Alpine Linux","cpePart":null,"purl":"pkg:apk/alpine/xen","purlType":"apk","versions":[{"text":"< 4.15.4-r3","noFixRecorded":false,"fixedIn":null},{"text":"< 4.16.4-r3","noFixRecorded":false,"fixedIn":null},{"text":"< 4.17.1-r4","noFixRecorded":false,"fixedIn":null},{"text":"< 4.17.1-r5","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 4.15.4-r3 | < 4.16.4-r3 | < 4.17.1-r4 | < 4.17.1-r5","eol":null,"hubHref":null},{"vendor":"arm","product":"cortex-a77_firmware","name":"cortex-a77 firmware","label":"cortex-a77_firmware","ecosystem":null,"cpePart":"o","purl":null,"purlType":null,"versions":[{"text":"r0p0","noFixRecorded":false,"fixedIn":null},{"text":"r1p0","noFixRecorded":false,"fixedIn":null}],"versionsText":"r0p0 | r1p0","eol":null,"hubHref":"/vendor/arm/cortex-a77"},{"vendor":"debian","product":"xen","name":"xen","label":"xen","ecosystem":"Debian","cpePart":null,"purl":"pkg:deb/debian/xen","purlType":"deb","versions":[{"text":"< 4.17.2+76-ge1f9cb16e2-1~deb12u1","noFixRecorded":false,"fixedIn":null},{"text":"< 4.17.2-1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 4.17.2+76-ge1f9cb16e2-1~deb12u1 | < 4.17.2-1","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}],"affectedCount":4,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://xenbits.xenproject.org/xsa/advisory-436.html","label":"xenbits.xenproject.org/xsa/advisory-436.html","hostname":"xenbits.xenproject.org","tags":["Third Party Advisory"]},{"url":"http://xenbits.xen.org/xsa/advisory-436.html","label":"xenbits.xen.org/xsa/advisory-436.html","hostname":"xenbits.xen.org","tags":[]},{"url":"https://security.alpinelinux.org/vuln/CVE-2023-34320","label":"security.alpinelinux.org/vuln/CVE-2023-34320","hostname":"security.alpinelinux.org","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2023-34320","label":"ubuntu.com/security/CVE-2023-34320","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://www.openwall.com/lists/oss-security/2023/08/01/1","label":"www.openwall.com/lists/oss-security/2023/08/01/1","hostname":"www.openwall.com","tags":["REPORT"]},{"url":"https://xenbits.xen.org/xsa/advisory-436.html","label":"xenbits.xen.org/xsa/advisory-436.html","hostname":"xenbits.xen.org","tags":["REPORT"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2023-34320","label":"www.cve.org/CVERecord?id=CVE-2023-34320","hostname":"www.cve.org","tags":["REPORT"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2023-34320","label":"security-tracker.debian.org/tracker/CVE-2023-34320","hostname":"security-tracker.debian.org","tags":["Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2023-12-08T20:54:06.993Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2025-11-04T19:16:33.356Z","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":"2026-10-20T22:37:25.170Z","stale":false,"partial":false}}