CVE-2024-57947

Source
https://nvd.nist.gov/vuln/detail/CVE-2024-57947
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2024-57947.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2024-57947
Downstream
Related
Published
2025-01-23T14:15:25Z
Modified
2025-08-09T20:01:28Z
Summary
[none]
Details

In the Linux kernel, the following vulnerability has been resolved:

netfilter: nfsetpipapo: fix initial map fill

The initial buffer has to be inited to all-ones, but it must restrict it to the size of the first field, not the total field size.

After each round in the map search step, the result and the fill map are swapped, so if we have a set where f->bsize of the first element is smaller than m->bsize_max, those one-bits are leaked into future rounds result map.

This makes pipapo find an incorrect matching results for sets where first field size is not the largest.

Followup patch adds a test case to nftconcatrange.sh selftest script.

Thanks to Stefano Brivio for pointing out that we need to zero out the remainder explicitly, only correcting memset() argument isn't enough.

References

Affected packages