CVE-2023-4015
Use-after-free in Linux kernel's netfilter: nf_tables component
- State
- Published
- Severity
- 7.8 High
- Published
- Sep 6, 2023
- Updated
- Oct 14, 2026
- Reserved
- Jul 31, 2023
Description
A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to achieve local privilege escalation.
On an error when building a nftables rule, deactivating immediate expressions in nft_immediate_deactivate() can lead unbinding the chain and objects be deactivated but later used.
We recommend upgrading past commit 0a771f7b266b02d262900c75f1e175c7fe76fec2.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.8 High | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Weaknesses
- CWE-416 Use After Free
Affected Products
| Product | Versions |
|---|---|
KernelLinux |
|
References
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0a771f7b266b02d262900c75f1e175c7fe76fec2patch
- https://kernel.dance/0a771f7b266b02d262900c75f1e175c7fe76fec2
- https://www.debian.org/security/2023/dsa-5492
- https://cert-portal.siemens.com/productcert/html/ssa-831302.html
- https://cert-portal.siemens.com/productcert/html/ssa-794697.html
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