{"cve":"CVE-2026-31689","nvd":{"published":"2026-04-27T18:16:54.387","modified":"2026-06-17T10:34:14.720","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nEDAC/mc: Fix error path ordering in edac_mc_alloc()\n\nWhen the mci->pvt_info allocation in edac_mc_alloc() fails, the error path\nwill call put_device() which will end up calling the device's release\nfunction.\n\nHowever, the init ordering is wrong such that device_initialize() happens\n*after* the failed allocation and thus the device itself and the release\nfunction pointer are not initialized yet when they're called:\n\n  MCE: In-kernel MCE decoding enabled.\n  ------------[ cut here ]------------\n  kobject: '(null)': is not initialized, yet kobject_put() is being called.\n  WARNING: lib/kobject.c:734 at kobject_put, CPU#22: systemd-udevd\n  CPU: 22 UID: 0 PID: 538 Comm: systemd-udevd Not tainted 7.0.0-rc1+ #2 PREEMPT(full)\n  RIP: 0010:kobject_put\n  Call Trace:\n   <TASK>\n   edac_mc_alloc+0xbe/0xe0 [edac_core]\n   amd64_edac_init+0x7a4/0xff0 [amd64_edac]\n   ? __pfx_amd64_edac_init+0x10/0x10 [amd64_edac]\n   do_one_initcall\n   ...\n\nReorder the calling sequence so that the device is initialized and thus the\nrelease function pointer is properly set before it can be used.\n\nThis was found by Claude while reviewing another EDAC patch.","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/51520e03e70d6c73e33ee7cbe0319767d05764fe","https://git.kernel.org/stable/c/75825648ce984ca4cebb28e4bd2bf8c3a7e837c5","https://git.kernel.org/stable/c/87ce8ae511962e105bcb3534944208c6a9471ed9","https://git.kernel.org/stable/c/aae95970fad2127a1bd49d8713c7cd0677dcd2d6","https://git.kernel.org/stable/c/d20e98c2df9354cc744431ad8ccbf49405b8b40f"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:33:09.003606135+00:00"},"epss":{"cve":"CVE-2026-31689","score":0.00115,"percentile":0.01505,"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."]}