CVE-2023-1390

moderate-risk
Published 2023-03-16

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.

Do I need to act?

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0.51% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.5/10 High
NETWORK / LOW complexity

Affected Products (4)

Affected Vendors

Linux

References (8)

Third Party Advisory https://gist.github.com/netspooky/bee2d07022f6350bb88eaa48e571d9b5
Patch https://github.com/torvalds/linux/commit/b77413446408fdd256599daf00d5be72b5f3e7c...
https://infosec.exchange/%40_mattata/109427999461122360
Third Party Advisory https://security.netapp.com/advisory/ntap-20230420-0001/
Third Party Advisory https://gist.github.com/netspooky/bee2d07022f6350bb88eaa48e571d9b5
Patch https://github.com/torvalds/linux/commit/b77413446408fdd256599daf00d5be72b5f3e7c...
https://infosec.exchange/%40_mattata/109427999461122360
Third Party Advisory https://security.netapp.com/advisory/ntap-20230420-0001/
38
/ 100
moderate-risk
Severity 26/34 · High
Exploitability 2/34 · Minimal
Exposure 10/34 · Low