CVE-2022-1012

Severity: high (CVSS 8.2 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 4.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-08-05 · updated 2026-10-14
Weakness: CWE-401

Description

A memory leak problem was found in the TCP source port generation algorithm in net/ipv4/tcp.c due to the small table perturb size. This flaw may allow an attacker to information leak and may cause a denial of service problem.

Affected products

Linux kernel: before 5.18; 5.18, 5.18-rc1, 5.18-rc2, 5.18-rc3, 5.18-rc4, 5.18-rc5 — fixed in 5.18

How to fix

Upgrade to a fixed version: Linux kernel 5.18. Check the vendor advisory for mitigations.

References

https://bugzilla.redhat.com/show_bug.cgi?id=2064604
https://lore.kernel.org/lkml/20220427065233.2075-1-w%401wt.eu/T/
https://security.netapp.com/advisory/ntap-20221020-0006/
https://bugzilla.redhat.com/show_bug.cgi?id=2064604
https://lore.kernel.org/lkml/20220427065233.2075-1-w%401wt.eu/T/
https://security.netapp.com/advisory/ntap-20221020-0006/
https://cert-portal.siemens.com/productcert/html/ssa-561322.html
https://cert-portal.siemens.com/productcert/html/ssa-794697.html

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