{"cve":"CVE-2023-52977","nvd":{"published":"2025-03-27T17:15:44.793","modified":"2026-06-17T06:44:02.480","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: openvswitch: fix flow memory leak in ovs_flow_cmd_new\n\nSyzkaller reports a memory leak of new_flow in ovs_flow_cmd_new() as it is\nnot freed when an allocation of a key fails.\n\nBUG: memory leak\nunreferenced object 0xffff888116668000 (size 632):\n  comm \"syz-executor231\", pid 1090, jiffies 4294844701 (age 18.871s)\n  hex dump (first 32 bytes):\n    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n  backtrace:\n    [<00000000defa3494>] kmem_cache_zalloc include/linux/slab.h:654 [inline]\n    [<00000000defa3494>] ovs_flow_alloc+0x19/0x180 net/openvswitch/flow_table.c:77\n    [<00000000c67d8873>] ovs_flow_cmd_new+0x1de/0xd40 net/openvswitch/datapath.c:957\n    [<0000000010a539a8>] genl_family_rcv_msg_doit+0x22d/0x330 net/netlink/genetlink.c:739\n    [<00000000dff3302d>] genl_family_rcv_msg net/netlink/genetlink.c:783 [inline]\n    [<00000000dff3302d>] genl_rcv_msg+0x328/0x590 net/netlink/genetlink.c:800\n    [<000000000286dd87>] netlink_rcv_skb+0x153/0x430 net/netlink/af_netlink.c:2515\n    [<0000000061fed410>] genl_rcv+0x24/0x40 net/netlink/genetlink.c:811\n    [<000000009dc0f111>] netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline]\n    [<000000009dc0f111>] netlink_unicast+0x545/0x7f0 net/netlink/af_netlink.c:1339\n    [<000000004a5ee816>] netlink_sendmsg+0x8e7/0xde0 net/netlink/af_netlink.c:1934\n    [<00000000482b476f>] sock_sendmsg_nosec net/socket.c:651 [inline]\n    [<00000000482b476f>] sock_sendmsg+0x152/0x190 net/socket.c:671\n    [<00000000698574ba>] ____sys_sendmsg+0x70a/0x870 net/socket.c:2356\n    [<00000000d28d9e11>] ___sys_sendmsg+0xf3/0x170 net/socket.c:2410\n    [<0000000083ba9120>] __sys_sendmsg+0xe5/0x1b0 net/socket.c:2439\n    [<00000000c00628f8>] do_syscall_64+0x30/0x40 arch/x86/entry/common.c:46\n    [<000000004abfdcf4>] entry_SYSCALL_64_after_hwframe+0x61/0xc6\n\nTo fix this the patch rearranges the goto labels to reflect the order of\nobject allocations and adds appropriate goto statements on the error\npaths.\n\nFound by Linux Verification Center (linuxtesting.org) with Syzkaller.","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/0c598aed445eb45b0ee7ba405f7ece99ee349c30","https://git.kernel.org/stable/c/1ac653cf886cdfc082708c82dc6ac6115cebd2ee","https://git.kernel.org/stable/c/70154489f531587996f3e9d7cceeee65cff0001d","https://git.kernel.org/stable/c/70d40674a549d498bd63d5432acf46205da1534b","https://git.kernel.org/stable/c/af4e720bc00a2653f7b9df21755b9978b3d7f386"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:00:28.034033815+00:00"},"epss":{"cve":"CVE-2023-52977","score":0.00268,"percentile":0.1896,"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."]}