cbcvebase.
CVE-2023-52977
published 2025-03-27

CVE-2023-52977: In the Linux kernel, the following vulnerability has been resolved: net: openvswitch: fix flow memory leak in ovs_flow_cmd_new Syzkaller reports a memory leak…

PriorityP418medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.26%
17.4th percentile
In the Linux kernel, the following vulnerability has been resolved: net: openvswitch: fix flow memory leak in ovs_flow_cmd_new Syzkaller reports a memory leak of new_flow in ovs_flow_cmd_new() as it is not freed when an allocation of a key fails. BUG: memory leak unreferenced object 0xffff888116668000 (size 632): comm "syz-executor231", pid 1090, jiffies 4294844701 (age 18.871s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [] kmem_cache_zalloc include/linux/slab.h:654 [inline] [] ovs_flow_alloc+0x19/0x180 net/openvswitch/flow_table.c:77 [] ovs_flow_cmd_new+0x1de/0xd40 net/openvswitch/datapath.c:957 [] genl_family_rcv_msg_doit+0x22d/0x330 net/netlink/genetlink.c:739 [] genl_family_rcv_msg net/netlink/genetlink.c:783 [inline] [] genl_rcv_msg+0x328/0x590 net/netlink/genetlink.c:800 [] netlink_rcv_skb+0x153/0x430 net/netlink/af_netlink.c:2515 [] genl_rcv+0x24/0x40 net/netlink/genetlink.c:811 [] netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline] [] netlink_unicast+0x545/0x7f0 net/netlink/af_netlink.c:1339 [] netlink_sendmsg+0x8e7/0xde0 net/netlink/af_netlink.c:1934 [] sock_sendmsg_nosec net/socket.c:651 [inline] [] sock_sendmsg+0x152/0x190 net/socket.c:671 [] ____sys_sendmsg+0x70a/0x870 net/socket.c:2356 [] ___sys_sendmsg+0xf3/0x170 net/socket.c:2410 [] __sys_sendmsg+0xe5/0x1b0 net/socket.c:2439 [] do_syscall_64+0x30/0x40 arch/x86/entry/common.c:46 [] entry_SYSCALL_64_after_hwframe+0x61/0xc6 To fix this the patch rearranges the goto labels to reflect the order of object allocations and adds appropriate goto statements on the error paths. Found by Linux Verification Center (linuxtesting.org) with Syzkaller.

Affected

30 ranges· showing 25
VendorProductVersion rangeFixed in
debianlinux< linux 6.1.11-1 (bookworm)linux 6.1.11-1 (bookworm)
linuxlinux——
linuxlinux——
linuxlinux>= 0133615a06007684df648feb9d327714e399afd4 < f423c2efd51d7eb1d143c2be7eea233241d9bbbff423c2efd51d7eb1d143c2be7eea233241d9bbbf
linuxlinux>= 32d5fa5bdccec2361fc6c4ed05a7367155b3a1e9 < 70d40674a549d498bd63d5432acf46205da1534b70d40674a549d498bd63d5432acf46205da1534b
linuxlinux>= 4.14.303 < 4.14.3064.14.306
linuxlinux>= 4.19.270 < 4.19.2734.19.273
linuxlinux>= 4.9.337 < 4.104.10
linuxlinux>= 5.10.163 < 5.10.1685.10.168
linuxlinux>= 5.15.86 < 5.15.935.15.93
linuxlinux>= 5.4.229 < 5.4.2325.4.232
linuxlinux>= 6.0.16 < 6.16.1
linuxlinux>= 6.1.2 < 6.1.116.1.11
linuxlinux>= 655e873bf528f0f46ce6b069f9a2daee9621197c < 1ac653cf886cdfc082708c82dc6ac6115cebd2ee1ac653cf886cdfc082708c82dc6ac6115cebd2ee
linuxlinux>= 6736b61ecf230dd656464de0f514bdeadb384f20 < 70154489f531587996f3e9d7cceeee65cff0001d70154489f531587996f3e9d7cceeee65cff0001d
linuxlinux>= 68bb10101e6b0a6bb44e9c908ef795fc4af99eae < 0c598aed445eb45b0ee7ba405f7ece99ee349c300c598aed445eb45b0ee7ba405f7ece99ee349c30
linuxlinux>= 8b74211bf60b3e0c0ed4fe3d16c92ffdcaaf34eb < ed6c5e8caf55778500202775167e8ccdb1a030cbed6c5e8caf55778500202775167e8ccdb1a030cb
linuxlinux>= ee27d70556a47c3a07e65a60f47e3ea12a255af8 < af4e720bc00a2653f7b9df21755b9978b3d7f386af4e720bc00a2653f7b9df21755b9978b3d7f386
linuxlinux_kernel>= 0 < 5.10.178-15.10.178-1
linuxlinux_kernel>= 0 < 6.1.11-16.1.11-1
linuxlinux_kernel>= 0 < 6.1.11-16.1.11-1
linuxlinux_kernel>= 0 < 6.1.11-16.1.11-1
linuxlinux_kernel>= 4.14.303 < 4.14.3064.14.306
linuxlinux_kernel>= 4.19.270 < 4.19.2734.19.273
linuxlinux_kernel>= 4.9.337 < 4.104.10

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv5.5MEDIUM
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
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