What’s Vulnerable › Vulnerabilities

CVE-2023-1390

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 5.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-03-16 · updated 2026-06-17
• Weakness: CWE-1050

Description

A remote denial of service vulnerability was found in the Linux kernel’s TIPC kernel module. The while loop in tipc_link_xmit() hits an unknown state while attempting to parse SKBs, which are not in the queue. Sending two small UDP packets to a system with a UDP bearer results in the CPU utilization for the system to instantly spike to 100%, causing a denial of service condition.

Affected products

• Linux kernel: from 4.3 before 4.9.253; from 4.10 before 4.14.217; from 4.15 before 4.19.170; from 4.20 before 5.4.92; from 5.5 before 5.10.10; 5.11-rc1, 5.11-rc2, 5.11-rc3 — fixed in 4.14.217, 4.19.170, 4.9.253, 5.10.10, 5.4.92

How to fix

Upgrade to a fixed version: Linux kernel 4.14.217, 4.19.170, 4.9.253, 5.10.10. Check the vendor advisory for mitigations.

References

• https://gist.github.com/netspooky/bee2d07022f6350bb88eaa48e571d9b5
• https://github.com/torvalds/linux/commit/b77413446408fdd256599daf00d5be72b5f3e7c6
• https://infosec.exchange/%40_mattata/109427999461122360
• https://security.netapp.com/advisory/ntap-20230420-0001/
• https://gist.github.com/netspooky/bee2d07022f6350bb88eaa48e571d9b5
• https://github.com/torvalds/linux/commit/b77413446408fdd256599daf00d5be72b5f3e7c6
• https://infosec.exchange/%40_mattata/109427999461122360
• https://security.netapp.com/advisory/ntap-20230420-0001/

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