{"cve":"CVE-2023-52976","nvd":{"published":"2025-03-27T17:15:44.657","modified":"2026-06-17T06:44:02.310","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nefi: fix potential NULL deref in efi_mem_reserve_persistent\n\nWhen iterating on a linked list, a result of memremap is dereferenced\nwithout checking it for NULL.\n\nThis patch adds a check that falls back on allocating a new page in\ncase memremap doesn't succeed.\n\nFound by Linux Verification Center (linuxtesting.org) with SVACE.\n\n[ardb: return -ENOMEM instead of breaking out of the loop]","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":["CWE-476"],"references":["https://git.kernel.org/stable/c/87d4ff18738fd71e7e3c10827c80257da6283697","https://git.kernel.org/stable/c/966d47e1f27c45507c5df82b2a2157e5a4fd3909","https://git.kernel.org/stable/c/a2e6a9ff89f13666a1c3ff7195612ab949ea9afc","https://git.kernel.org/stable/c/d8fc0b5fb3e816a4a8684bcd3ed02cbef0fce23c","https://git.kernel.org/stable/c/d92a25627bcdf264183670da73c9a60c0bac327e"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:00:28.034033815+00:00"},"epss":{"cve":"CVE-2023-52976","score":0.00281,"percentile":0.20598,"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."]}