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CVE-2023-52977

5.5 · MEDIUM

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…

Published Mar 27, 2025CWE-401EPSS 0.27%

Overview

CVE-2023-52977 is a medium-severity vulnerability. It was published on March 27, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical 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]

[<00000000

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/0c598aed445eb45b0ee7ba405f7ece99ee349c30Refgit.kernel.org/stable/c/1ac653cf886cdfc082708c82dc6ac6115cebd2eeRefgit.kernel.org/stable/c/70154489f531587996f3e9d7cceeee65cff0001dRefgit.kernel.org/stable/c/70d40674a549d498bd63d5432acf46205da1534bRefgit.kernel.org/stable/c/af4e720bc00a2653f7b9df21755b9978b3d7f386Refgit.kernel.org/stable/c/ed6c5e8caf55778500202775167e8ccdb1a030cbRefgit.kernel.org/stable/c/f423c2efd51d7eb1d143c2be7eea233241d9bbbf

How CyberStrike helps

Frequently asked questions

What is CVE-2023-52977?

CVE-2023-52977 is a medium-severity vulnerability. It was published on March 27, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2023-52977?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2023-52977?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2023-52977?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-52977 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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