CVE-2023-4015: Use-after-free in Linux kernel's netfilter: nf_tables component
A use-after-free vulnerability in the Linux kernel's netfilter: nftables component can be exploited to achieve local privilege escalation.
On an error when building a nftables rule, deactivating immediate expressions in nftimmediatedeactivate() can lead unbinding the chain and objects be deactivated but later used.
We recommend upgrading past commit 0a771f7b266b02d262900c75f1e175c7fe76fec2.
Affected Software
Remediation
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Event History
Frequently Asked Questions
What is the severity of CVE-2023-4015?
The severity of CVE-2023-4015 is relatively high due to its potential for local privilege escalation.
How do I fix CVE-2023-4015?
To fix CVE-2023-4015, update the Linux kernel to version 6.5 or apply the necessary patches as specified by your distribution.
Which systems are affected by CVE-2023-4015?
CVE-2023-4015 affects various versions of the Linux kernel, specifically from 5.9 to 6.5, and certain Debian Linux versions.
What type of vulnerability is CVE-2023-4015?
CVE-2023-4015 is classified as a use-after-free vulnerability in the netfilter nf_tables component.
Can CVE-2023-4015 be exploited remotely?
CVE-2023-4015 is primarily a local privilege escalation vulnerability and cannot be exploited remotely.