CVE-2022-48641: netfilter: ebtables: fix memory leak when blob is malformed

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-04-28 · updated 2026-06-17
Weakness: CWE-401

Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: ebtables: fix memory leak when blob is malformed The bug fix was incomplete, it "replaced" crash with a memory leak. The old code had an assignment to "ret" embedded into the conditional, restore this.

Affected products

Linux kernel: from 4.14.292 before 4.14.295; from 4.19.257 before 4.19.260; from 5.4.212 before 5.4.215; from 5.10.140 before 5.10.146; from 5.15.64 before 5.15.71; from 5.19.6 before 5.19.12 — fixed in 4.14.295, 4.19.260, 5.10.146, 5.15.71, 5.19.12, 5.4.215

How to fix

Upgrade to a fixed version: Linux kernel 4.14.295, 4.19.260, 5.10.146, 5.15.71. Check the vendor advisory for mitigations.

References

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