{"cve":"CVE-2023-46841","nvd":{"published":"2024-03-20T11:15:08.220","modified":"2026-06-17T06:31:44.437","status":"Modified","description":"Recent x86 CPUs offer functionality named Control-flow Enforcement\nTechnology (CET).  A sub-feature of this are Shadow Stacks (CET-SS).\nCET-SS is a hardware feature designed to protect against Return Oriented\nProgramming attacks. When enabled, traditional stacks holding both data\nand return addresses are accompanied by so called \"shadow stacks\",\nholding little more than return addresses.  Shadow stacks aren't\nwritable by normal instructions, and upon function returns their\ncontents are used to check for possible manipulation of a return address\ncoming from the traditional stack.\n\nIn particular certain memory accesses need intercepting by Xen.  In\nvarious cases the necessary emulation involves kind of replaying of\nthe instruction.  Such replaying typically involves filling and then\ninvoking of a stub.  Such a replayed instruction may raise an\nexceptions, which is expected and dealt with accordingly.\n\nUnfortunately the interaction of both of the above wasn't right:\nRecovery involves removal of a call frame from the (traditional) stack.\nThe counterpart of this operation for the shadow stack was missing.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H","score":6.5},"cwes":[],"references":["https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZON4TLXG7TG4A2XZG563JMVTGQW4SF3A/","https://xenbits.xenproject.org/xsa/advisory-451.html","http://xenbits.xen.org/xsa/advisory-451.html","https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/HES2IJXZY3H7HBPP4NVSVYYNGW254DMI/","https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZON4TLXG7TG4A2XZG563JMVTGQW4SF3A/"],"products":["fedoraproject:fedora","xen:xen"],"source":"nvd","synced_at":"2026-10-19T21:47:51.568503435+00:00"},"epss":{"cve":"CVE-2023-46841","score":0.00269,"percentile":0.19095,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}