{"cve":"CVE-2024-40983","nvd":{"published":"2024-07-12T13:15:19.893","modified":"2026-08-04T11:19:12.277","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ntipc: force a dst refcount before doing decryption\n\nAs it says in commit 3bc07321ccc2 (\"xfrm: Force a dst refcount before\nentering the xfrm type handlers\"):\n\n\"Crypto requests might return asynchronous. In this case we leave the\n rcu protected region, so force a refcount on the skb's destination\n entry before we enter the xfrm type input/output handlers.\"\n\nOn TIPC decryption path it has the same problem, and skb_dst_force()\nshould be called before doing decryption to avoid a possible crash.\n\nShuang reported this issue when this warning is triggered:\n\n  [] WARNING: include/net/dst.h:337 tipc_sk_rcv+0x1055/0x1ea0 [tipc]\n  [] Kdump: loaded Tainted: G W --------- - - 4.18.0-496.el8.x86_64+debug\n  [] Workqueue: crypto cryptd_queue_worker\n  [] RIP: 0010:tipc_sk_rcv+0x1055/0x1ea0 [tipc]\n  [] Call Trace:\n  [] tipc_sk_mcast_rcv+0x548/0xea0 [tipc]\n  [] tipc_rcv+0xcf5/0x1060 [tipc]\n  [] tipc_aead_decrypt_done+0x215/0x2e0 [tipc]\n  [] cryptd_aead_crypt+0xdb/0x190\n  [] cryptd_queue_worker+0xed/0x190\n  [] process_one_work+0x93d/0x17e0","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/2ebe8f840c7450ecbfca9d18ac92e9ce9155e269","https://git.kernel.org/stable/c/3eb1b39627892c4e26cb0162b75725aa5fcc60c8","https://git.kernel.org/stable/c/623c90d86a61e3780f682b32928af469c66ec4c2","https://git.kernel.org/stable/c/6808b41371670c51feea14f63ade211e78100930","https://git.kernel.org/stable/c/692803b39a36e63ac73208e0a3769ae6a2f9bc76"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:52:42.518321223+00:00"},"epss":{"cve":"CVE-2024-40983","score":0.00881,"percentile":0.59153,"date":"2026-11-01"},"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."]}