What’s Vulnerable › Vulnerabilities

CVE-2023-1838

• Severity: high (CVSS 7.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-04-05 · updated 2026-10-08
• Weakness: CWE-416

Description

A use-after-free flaw was found in vhost_net_set_backend in drivers/vhost/net.c in virtio network subcomponent in the Linux kernel due to a double fget. This flaw could allow a local attacker to crash the system, and could even lead to a kernel information leak problem.

Affected products

• Linux kernel: from 4.13 before 4.14.317; from 4.15 before 4.19.245; from 4.20 before 5.4.196; from 5.5 before 5.10.118; from 5.11 before 5.15.42; from 5.16 before 5.17.10 — fixed in 4.14.317, 4.19.245, 5.10.118, 5.15.42, 5.17.10, 5.4.196
• NetApp H300S: all versions
• NetApp H410C: all versions
• NetApp H410S: all versions
• NetApp H500S: all versions
• NetApp H700S: all versions

How to fix

Upgrade to a fixed version: Linux kernel 4.14.317, 4.19.245, 5.10.118, 5.15.42. Check the vendor advisory for mitigations.

References

• https://lore.kernel.org/netdev/20220516084213.26854-1-jasowang%40redhat.com/T/
• https://security.netapp.com/advisory/ntap-20230517-0003/
• https://lore.kernel.org/netdev/20220516084213.26854-1-jasowang%40redhat.com/T/
• https://security.netapp.com/advisory/ntap-20230517-0003/

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