{"cve":"CVE-2023-53731","nvd":{"published":"2025-10-22T14:15:48.423","modified":"2026-10-28T19:10:00.193","status":"Deferred","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetlink: fix potential deadlock in netlink_set_err()\n\nsyzbot reported a possible deadlock in netlink_set_err() [1]\n\nA similar issue was fixed in commit 1d482e666b8e (\"netlink: disable IRQs\nfor netlink_lock_table()\") in netlink_lock_table()\n\nThis patch adds IRQ safety to netlink_set_err() and __netlink_diag_dump()\nwhich were not covered by cited commit.\n\n[1]\n\nWARNING: possible irq lock inversion dependency detected\n6.4.0-rc6-syzkaller-00240-g4e9f0ec38852 #0 Not tainted\n\nsyz-executor.2/23011 just changed the state of lock:\nffffffff8e1a7a58 (nl_table_lock){.+.?}-{2:2}, at: netlink_set_err+0x2e/0x3a0 net/netlink/af_netlink.c:1612\nbut this lock was taken by another, SOFTIRQ-safe lock in the past:\n (&local->queue_stop_reason_lock){..-.}-{2:2}\n\nand interrupts could create inverse lock ordering between them.\n\nother info that might help us debug this:\n Possible interrupt unsafe locking scenario:\n\n       CPU0                    CPU1\n       ----                    ----\n  lock(nl_table_lock);\n                               local_irq_disable();\n                               lock(&local->queue_stop_reason_lock);\n                               lock(nl_table_lock);\n  <Interrupt>\n    lock(&local->queue_stop_reason_lock);\n\n *** DEADLOCK ***","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/1556ba034b95cfd4f75ea93c1a2679ae0444bba1","https://git.kernel.org/stable/c/4b9adb8d4a62ff7608d4a7d4eb42036a88f30980","https://git.kernel.org/stable/c/61ffe8b1ee084e5c82a4e4bbf9e7b68e0c06e464","https://git.kernel.org/stable/c/8d61f926d42045961e6b65191c09e3678d86a9cf","https://git.kernel.org/stable/c/8f6652ed2ad98fe6d13b903483d9257762ab2ec6"],"products":[],"source":"nvd","synced_at":"2026-10-28T19:37:43.506563291+00:00"},"epss":{"cve":"CVE-2023-53731","score":0.00231,"percentile":0.14023,"date":"2026-10-28"},"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."]}