{"cve":"CVE-2021-47250","nvd":{"published":"2024-05-21T15:15:13.930","modified":"2026-06-17T04:17:00.867","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ipv4: fix memory leak in netlbl_cipsov4_add_std\n\nReported by syzkaller:\nBUG: memory leak\nunreferenced object 0xffff888105df7000 (size 64):\ncomm \"syz-executor842\", pid 360, jiffies 4294824824 (age 22.546s)\nhex dump (first 32 bytes):\n00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................\n00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................\nbacktrace:\n[<00000000e67ed558>] kmalloc include/linux/slab.h:590 [inline]\n[<00000000e67ed558>] kzalloc include/linux/slab.h:720 [inline]\n[<00000000e67ed558>] netlbl_cipsov4_add_std net/netlabel/netlabel_cipso_v4.c:145 [inline]\n[<00000000e67ed558>] netlbl_cipsov4_add+0x390/0x2340 net/netlabel/netlabel_cipso_v4.c:416\n[<0000000006040154>] genl_family_rcv_msg_doit.isra.0+0x20e/0x320 net/netlink/genetlink.c:739\n[<00000000204d7a1c>] genl_family_rcv_msg net/netlink/genetlink.c:783 [inline]\n[<00000000204d7a1c>] genl_rcv_msg+0x2bf/0x4f0 net/netlink/genetlink.c:800\n[<00000000c0d6a995>] netlink_rcv_skb+0x134/0x3d0 net/netlink/af_netlink.c:2504\n[<00000000d78b9d2c>] genl_rcv+0x24/0x40 net/netlink/genetlink.c:811\n[<000000009733081b>] netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline]\n[<000000009733081b>] netlink_unicast+0x4a0/0x6a0 net/netlink/af_netlink.c:1340\n[<00000000d5fd43b8>] netlink_sendmsg+0x789/0xc70 net/netlink/af_netlink.c:1929\n[<000000000a2d1e40>] sock_sendmsg_nosec net/socket.c:654 [inline]\n[<000000000a2d1e40>] sock_sendmsg+0x139/0x170 net/socket.c:674\n[<00000000321d1969>] ____sys_sendmsg+0x658/0x7d0 net/socket.c:2350\n[<00000000964e16bc>] ___sys_sendmsg+0xf8/0x170 net/socket.c:2404\n[<000000001615e288>] __sys_sendmsg+0xd3/0x190 net/socket.c:2433\n[<000000004ee8b6a5>] do_syscall_64+0x37/0x90 arch/x86/entry/common.c:47\n[<00000000171c7cee>] entry_SYSCALL_64_after_hwframe+0x44/0xae\n\nThe memory of doi_def->map.std pointing is allocated in\nnetlbl_cipsov4_add_std, but no place has freed it. It should be\nfreed in cipso_v4_doi_free which frees the cipso DOI resource.","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-401"],"references":["https://git.kernel.org/stable/c/086e92b1d68c6338535f715aad173f8cf4bfbc8c","https://git.kernel.org/stable/c/0ffb460be3abac86f884a8c548bb02724ec370f4","https://git.kernel.org/stable/c/212166510582631994be4f4b3fe15e10a03c1dd4","https://git.kernel.org/stable/c/398a24447eb60f060c8994221cb5ae6caf355fa1","https://git.kernel.org/stable/c/5340858147e3dc60913fb3dd0cbb758ec4a26e66"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:50:30.954589733+00:00"},"epss":{"cve":"CVE-2021-47250","score":0.00238,"percentile":0.1493,"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."]}