CVE-2023-52977

MEDIUM EPSS 16.4%
Published Mar 27, 20251y ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Mar 27, 2025 1y ago
Last Modified Jun 17, 2026 1w ago

Description

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: [<00000000defa3494>] kmem_cache_zalloc include/linux/slab.h:654 [inline] [<00000000defa3494>] ovs_flow_alloc+0x19/0x180 net/openvswitch/flow_table.c:77 [<00000000c67d8873>] ovs_flow_cmd_new+0x1de/0xd40 net/openvswitch/datapath.c:957 [<0000000010a539a8>] genl_family_rcv_msg_doit+0x22d/0x330 net/netlink/genetlink.c:739 [<00000000dff3302d>] genl_family_rcv_msg net/netlink/genetlink.c:783 [inline] [<00000000dff3302d>] genl_rcv_msg+0x328/0x590 net/netlink/genetlink.c:800 [<000000000286dd87>] netlink_rcv_skb+0x153/0x430 net/netlink/af_netlink.c:2515 [<0000000061fed410>] genl_rcv+0x24/0x40 net/netlink/genetlink.c:811 [<000000009dc0f111>] netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline] [<000000009dc0f111>] netlink_unicast+0x545/0x7f0 net/netlink/af_netlink.c:1339 [<000000004a5ee816>] netlink_sendmsg+0x8e7/0xde0 net/netlink/af_netlink.c:1934 [<00000000482b476f>] sock_sendmsg_nosec net/socket.c:651 [inline] [<00000000482b476f>] sock_sendmsg+0x152/0x190 net/socket.c:671 [<00000000698574ba>] ____sys_sendmsg+0x70a/0x870 net/socket.c:2356 [<00000000d28d9e11>] ___sys_sendmsg+0xf3/0x170 net/socket.c:2410 [<0000000083ba9120>] __sys_sendmsg+0xe5/0x1b0 net/socket.c:2439 [<00000000c00628f8>] do_syscall_64+0x30/0x40 arch/x86/entry/common.c:46 [<000000004abfdcf4>] 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.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
16.4% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-401

Affected Products 8

VendorProductVersionRange
linuxlinux_kernel*≥4.9.337  –  <4.10
linuxlinux_kernel*≥4.14.303  –  <4.14.306
linuxlinux_kernel*≥4.19.270  –  <4.19.273
linuxlinux_kernel*≥5.4.229  –  <5.4.232
linuxlinux_kernel*≥5.10.163  –  <5.10.168
linuxlinux_kernel*≥5.15.86  –  <5.15.93
linuxlinux_kernel*≥6.0.16  –  <6.1
linuxlinux_kernel*≥6.1.2  –  <6.1.11

References 7

  • git.kernel.org https://git.kernel.org/stable/c/0c598aed445eb45b0ee7ba405f7ece99ee349c30
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/1ac653cf886cdfc082708c82dc6ac6115cebd2ee
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/70154489f531587996f3e9d7cceeee65cff0001d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/70d40674a549d498bd63d5432acf46205da1534b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/af4e720bc00a2653f7b9df21755b9978b3d7f386
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ed6c5e8caf55778500202775167e8ccdb1a030cb
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f423c2efd51d7eb1d143c2be7eea233241d9bbbf
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/0c598aed445eb45b0ee7ba405f7ece99ee349c30
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/1ac653cf886cdfc082708c82dc6ac6115cebd2ee
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/70154489f531587996f3e9d7cceeee65cff0001d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/70d40674a549d498bd63d5432acf46205da1534b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/af4e720bc00a2653f7b9df21755b9978b3d7f386
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ed6c5e8caf55778500202775167e8ccdb1a030cb
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f423c2efd51d7eb1d143c2be7eea233241d9bbbf
    Patch