MikroTik RouterOS up to 6.40.5/6.44/7.20.8 ipt_SAME.ko same_check integer overflow

Summaryinfo

A vulnerability has been found in MikroTik RouterOS up to 6.40.5/6.44/7.20.8 and classified as critical. The affected element is the function same_check of the file ipt_SAME.ko. The manipulation leads to integer overflow. This vulnerability is referenced as CVE-2026-112158. Remote exploitation of the attack is possible. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in MikroTik RouterOS up to 6.40.5/6.44/7.20.8 and classified as critical. This issue affects the function same_check of the file ipt_SAME.ko. The manipulation with an unknown input leads to a integer overflow vulnerability. Using CWE to declare the problem leads to CWE-190. The product performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control. Impacted is availability.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-112158. The exploitation is known to be easy. The attack may be initiated remotely. Technical details are known, but no exploit is available.

Upgrading to version 7.21.5 or 7.23.1 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-104417). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• Router Operating System

Vendor

• MikroTik

Name

• RouterOS

Version

• 6.0
• 6.1
• 6.2
• 6.3
• 6.4
• 6.5
• 6.6
• 6.7
• 6.8
• 6.9
• 6.10
• 6.11
• 6.12
• 6.13
• 6.14
• 6.15
• 6.16
• 6.17
• 6.18
• 6.19
• 6.20
• 6.21
• 6.22
• 6.23
• 6.24
• 6.25
• 6.26
• 6.27
• 6.28
• 6.29
• 6.30
• 6.31
• 6.32
• 6.33
• 6.34
• 6.35
• 6.36
• 6.37
• 6.38
• 6.39
• 6.40
• 6.40.0
• 6.40.1
• 6.40.2
• 6.40.3
• 6.40.4
• 6.40.5
• 6.41
• 6.42
• 6.43
• 6.44
• 7.20.0
• 7.20.1
• 7.20.2
• 7.20.3
• 7.20.4
• 7.20.5
• 7.20.6
• 7.20.7
• 7.20.8

License

• commercial

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Submitinfo

Accepted

• Submit #956852: MikroTik RouterOS <= 7.20.x long-term channel (tested: 6.40.5, 6.44, 7.20.8); v6 line affected Integer Overflow (by CindyCity)

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Discussion