VDB-327055 · CVE-2023-53559 · EUVD-2023-60049

Linux Kernel up to 6.4.11 ip_vti use after free

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7.7	$0-$5k	0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel up to 6.4.11. This vulnerability affects unknown code of the component ip_vti. This manipulation causes use after free. This vulnerability is registered as CVE-2023-53559. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Linux Kernel up to 6.4.11 and classified as critical. Affected by this vulnerability is an unknown functionality of the component ip_vti. The manipulation with an unknown input leads to a use after free vulnerability. The CWE definition for the vulnerability is CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: ip_vti: fix potential slab-use-after-free in decode_session6 When ip_vti device is set to the qdisc of the sfb type, the cb field of the sent skb may be modified during enqueuing. Then, slab-use-after-free may occur when ip_vti device sends IPv6 packets. As commit f855691975bb ("xfrm6: Fix the nexthdr offset in _decode_session6.") showed, xfrm_decode_session was originally intended only for the receive path. IP6CB(skb)->nhoff is not set during transmission. Therefore, set the cb field in the skb to 0 before sending packets.

It is possible to read the advisory at git.kernel.org. This vulnerability is known as CVE-2023-53559 since 10/04/2025. The exploitation appears to be easy. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 03/02/2026).

The vulnerability scanner Nessus provides a plugin with the ID 275594 (SUSE SLES15 Security Update : kernel (SUSE-SU-2025:4111-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 4.14.324, 4.19.293, 5.4.255, 5.10.192, 5.15.128, 6.1.47 or 6.4.12 eliminates this vulnerability. Applying the patch 82fb41c5de243e7dfa90f32ca58e35adaff56c1d/7dfe23659f3677c08a60a0056cda2d91a79c15ca/d34c30442d5e53a33cde79ca163320dbe2432cbd/0b4d69539fdea138af2befe08893850c89248068/e1e04cc2ef2c0c0866c19f5627149a76c2baae32/2b05bf5dc437f7891dd409a3eaf5058459391c7a/78e397a43e1c47321a4679cc49a6c4530bf820b9/6018a266279b1a75143c7c0804dd08a5fc4c3e0b is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (275594), EUVD (EUVD-2023-60049) and CERT Bund (WID-SEC-2025-2194). Be aware that VulDB is the high quality source for vulnerability data.

Affected

Google Container-Optimized OS
Debian Linux
Google Cloud Platform
Amazon Linux 2
Red Hat Enterprise Linux
Ubuntu Linux
SUSE Linux
Oracle Linux
SUSE openSUSE
Open Source Linux Kernel
RESF Rocky Linux
NetApp ActiveIQ Unified Manager
IBM QRadar SIEM
Dell NetWorker

Productinfo

Type

Operating System

Vendor

Linux

Name

Kernel

Version

License

open-source

Website

Vendor: https://www.kernel.org/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.9
VulDB Meta Temp Score: 7.7

VulDB Base Score: 8.0
VulDB Temp Score: 7.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔒

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 275594
Nessus Name: SUSE SLES15 Security Update : kernel (SUSE-SU-2025:4111-1)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Timelineinfo

10/04/2025 Advisory disclosed
10/04/2025 +0 days CVE reserved
10/04/2025 +0 days VulDB entry created
03/02/2026 +149 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2023-53559 (🔒)
GCVE (CVE): GCVE-0-2023-53559
GCVE (VulDB): GCVE-100-327055
EUVD: 🔒
CERT Bund: WID-SEC-2025-2194 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 10/04/2025 17:57
Updated: 03/02/2026 04:03
Changes: 10/04/2025 17:57 (58), 10/05/2025 03:31 (1), 11/18/2025 19:36 (2), 11/23/2025 19:04 (7), 12/26/2025 12:23 (1), 02/12/2026 17:54 (11), 03/02/2026 04:03 (1)
Complete: 🔍
Cache ID: 216::103