- Vulnerability/
- CVE-2023-52925
CVE-2023-52925: netfilter: nf_tables: don't fail inserts if duplicate has expired
First published: Wed Feb 05 2025(Updated: )
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: don't fail inserts if duplicate has expired nftables selftests fail: run-tests.sh testcases/sets/0044interval_overlap_0 Expected: 0-2 . 0-3, got: W: [FAILED] ./testcases/sets/0044interval_overlap_0: got 1 Insertion must ignore duplicate but expired entries. Moreover, there is a strange asymmetry in nft_pipapo_activate: It refetches the current element, whereas the other ->activate callbacks (bitmap, hash, rhash, rbtree) use elem->priv. Same for .remove: other set implementations take elem->priv, nft_pipapo_remove fetches elem->priv, then does a relookup, remove this. I suspect this was the reason for the change that prompted the removal of the expired check in pipapo_get() in the first place, but skipping exired elements there makes no sense to me, this helper is used for normal get requests, insertions (duplicate check) and deactivate callback. In first two cases expired elements must be skipped. For ->deactivate(), this gets called for DELSETELEM, so it seems to me that expired elements should be skipped as well, i.e. delete request should fail with -ENOENT error.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel |
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Reference Links
- https://git.kernel.org/stable/c/891ca5dfe3b718b441fc786014a7ba8f517da188
- https://git.kernel.org/stable/c/af78b0489e8898a8c9449ffc0fdd2e181916f0d4
- https://git.kernel.org/stable/c/59ee68c437c562170265194a99698c805a686bb3
- https://git.kernel.org/stable/c/156369a702c33ad5434a19c3a689bfb836d4e0b8
- https://git.kernel.org/stable/c/7845914f45f066497ac75b30c50dbc735e84e884
Frequently Asked Questions
What is the severity of CVE-2023-52925?
CVE-2023-52925 is considered a low-severity vulnerability in the Linux kernel.
How do I fix CVE-2023-52925?
To fix CVE-2023-52925, update the Linux kernel to the latest version where the vulnerability is patched.
What does CVE-2023-52925 affect?
CVE-2023-52925 affects the netfilter component of the Linux kernel.
What is the impact of CVE-2023-52925?
The impact of CVE-2023-52925 involves potential failure of nftables self-tests related to interval overlaps.
What version of Linux kernel is affected by CVE-2023-52925?
CVE-2023-52925 affects various versions of the Linux kernel prior to the application of patches.
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