{"cve":"CVE-2026-43240","nvd":{"published":"2026-05-06T12:16:44.330","modified":"2026-06-19T13:16:29.197","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nx86/kexec: add a sanity check on previous kernel's ima kexec buffer\n\nWhen the second-stage kernel is booted via kexec with a limiting command\nline such as \"mem=<size>\", the physical range that contains the carried\nover IMA measurement list may fall outside the truncated RAM leading to a\nkernel panic.\n\n    BUG: unable to handle page fault for address: ffff97793ff47000\n    RIP: ima_restore_measurement_list+0xdc/0x45a\n    #PF: error_code(0x0000) – not-present page\n\nOther architectures already validate the range with page_is_ram(), as done\nin commit cbf9c4b9617b (\"of: check previous kernel's ima-kexec-buffer\nagainst memory bounds\") do a similar check on x86.\n\nWithout carrying the measurement list across kexec, the attestation\nwould fail.","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":[],"references":["https://git.kernel.org/stable/c/22e460b6333a5f818b042ac89201f8e735556f4a","https://git.kernel.org/stable/c/37f18915a261afe84dab462624ed829cddb77a9b","https://git.kernel.org/stable/c/4d7a8f5f28187e3d2958b2a134473da2665207e7","https://git.kernel.org/stable/c/7e2476057950c174c7b2c2802246707bbfb497e4","https://git.kernel.org/stable/c/c5489d04337b47e93c0623e8145fcba3f5739efd"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:33:55.586217763+00:00"},"epss":{"cve":"CVE-2026-43240","score":0.00123,"percentile":0.02007,"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."]}