{"cve":"CVE-2026-43178","nvd":{"published":"2026-05-06T12:16:36.303","modified":"2026-07-15T02:21:42.640","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nprocfs: fix possible double mmput() in do_procmap_query()\n\nWhen user provides incorrectly sized buffer for build ID for PROCMAP_QUERY\nwe return with -ENAMETOOLONG error.  After recent changes this condition\nhappens later, after we unlocked mmap_lock/per-VMA lock and did mmput(),\nso original goto out is now wrong and will double-mmput() mm_struct.  Fix\nby jumping further to clean up only vm_file and name_buf.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8},"cwes":["CWE-415","CWE-1341"],"references":["https://git.kernel.org/stable/c/61dc9f776705d6db6847c101b98fa4f0e9eb6fa3","https://git.kernel.org/stable/c/8adaff87db143583e08eec4f4e7788f1ef8af94d","https://git.kernel.org/stable/c/90f5e87c9b75833b9ef3a4415b92c0247f28ab2f","https://git.kernel.org/stable/c/f9fe092084cd04deea18747f58a2304026e76aaa","https://access.redhat.com/security/cve/CVE-2026-43178"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:33:55.586217763+00:00"},"epss":{"cve":"CVE-2026-43178","score":0.00132,"percentile":0.0276,"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."]}