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CVE-2023-53365

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: ip6mr: Fix skb_under_panic in ip6mr_cache_report() skbuff: skb_under_panic: text:ffffffff88771f69 len:56 put:-4 head:ffff88805…

Published Sep 17, 2025EPSS 0.19%

Overview

CVE-2023-53365 is a medium-severity vulnerability. It was published on September 17, 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:

ip6mr: Fix skb_under_panic in ip6mr_cache_report()

skbuff: skb_under_panic: text:ffffffff88771f69 len:56 put:-4

head:ffff88805f86a800 data:ffff887f5f86a850 tail:0x88 end:0x2c0 dev:pim6reg

------------[ cut here ]------------

kernel BUG at net/core/skbuff.c:192!

invalid opcode: 0000 [#1] PREEMPT SMP KASAN

CPU: 2 PID: 22968 Comm: kworker/2:11 Not tainted 6.5.0-rc3-00044-g0a8db05b571a #236

Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014

Workqueue: ipv6_addrconf addrconf_dad_work

RIP: 0010:skb_panic+0x152/0x1d0

Call Trace:

<TASK>

skb_push+0xc4/0xe0

ip6mr_cache_report+0xd69/0x19b0

reg_vif_xmit+0x406/0x690

dev_hard_start_xmit+0x17e/0x6e0

__dev_queue_xmit+0x2d6a/0x3d20

vlan_dev_hard_start_xmit+0x3ab/0x5c0

dev_hard_start_xmit+0x17e/0x6e0

__dev_queue_xmit+0x2d6a/0x3d20

neigh_connected_output+0x3ed/0x570

ip6_finish_output2+0x5b5/0x1950

ip6_finish_output+0x693/0x1

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/0438e60a00d4e335b3c36397dbf26c74b5d13ef0Refgit.kernel.org/stable/c/1683124129a4263dd5bce2475bab110e95fa0346Refgit.kernel.org/stable/c/1bb54a21f4d9b88442f8c3307c780e2db64417e4Refgit.kernel.org/stable/c/30e0191b16e8a58e4620fa3e2839ddc7b9d4281cRefgit.kernel.org/stable/c/3326c711f18d18fe6e1f5d83d3a7eab07e5a1560Refgit.kernel.org/stable/c/691a09eecad97e745b9aa0e3918db46d020bdacbRefgit.kernel.org/stable/c/8382e7ed2d63e6c2daf6881fa091526dc6c879cdRefgit.kernel.org/stable/c/a96d74d1076c82a4cef02c150d9996b21354c78d

How CyberStrike helps

Frequently asked questions

What is CVE-2023-53365?

CVE-2023-53365 is a medium-severity vulnerability. It was published on September 17, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2023-53365?

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-2023-53365?

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-2023-53365?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-53365 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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