CVE-2026-43453 (GCVE-0-2026-43453)
Vulnerability from cvelistv5 – Published: 2026-05-08 14:22 – Updated: 2026-05-11 22:24
VLAI?
Title
netfilter: nft_set_pipapo: fix stack out-of-bounds read in pipapo_drop()
Summary
In the Linux kernel, the following vulnerability has been resolved:
netfilter: nft_set_pipapo: fix stack out-of-bounds read in pipapo_drop()
pipapo_drop() passes rulemap[i + 1].n to pipapo_unmap() as the
to_offset argument on every iteration, including the last one where
i == m->field_count - 1. This reads one element past the end of the
stack-allocated rulemap array (declared as rulemap[NFT_PIPAPO_MAX_FIELDS]
with NFT_PIPAPO_MAX_FIELDS == 16).
Although pipapo_unmap() returns early when is_last is true without
using the to_offset value, the argument is evaluated at the call site
before the function body executes, making this a genuine out-of-bounds
stack read confirmed by KASAN:
BUG: KASAN: stack-out-of-bounds in pipapo_drop+0x50c/0x57c [nf_tables]
Read of size 4 at addr ffff8000810e71a4
This frame has 1 object:
[32, 160) 'rulemap'
The buggy address is at offset 164 -- exactly 4 bytes past the end
of the rulemap array.
Pass 0 instead of rulemap[i + 1].n on the last iteration to avoid
the out-of-bounds read.
Severity ?
No CVSS data available.
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
3c4287f62044a90e73a561aa05fc46e62da173da , < 1957e793196e7f8557374fd4eda53abcbb42e1c0
(git)
Affected: 3c4287f62044a90e73a561aa05fc46e62da173da , < 57fb87ca095d5127cd7a27583b8ec43dcf7c9e9e (git) Affected: 3c4287f62044a90e73a561aa05fc46e62da173da , < 60c1d18781e37bfb96290b86510eb01c5fa24d75 (git) Affected: 3c4287f62044a90e73a561aa05fc46e62da173da , < 0a55d62cdb628923d8a21724374a70c76ac7d19d (git) Affected: 3c4287f62044a90e73a561aa05fc46e62da173da , < dfbdac719198778b581bc0dd055df2542edb8c62 (git) Affected: 3c4287f62044a90e73a561aa05fc46e62da173da , < e047f6fbb975f685d6c9fcef95b3b7787a79b46d (git) Affected: 3c4287f62044a90e73a561aa05fc46e62da173da , < 324b749aa5b2d516ccfab933df9d3f56e7807f5f (git) Affected: 3c4287f62044a90e73a561aa05fc46e62da173da , < d6d8cd2db236a9dd13dbc2d05843b3445cc964b5 (git) |
|
| Linux | Linux |
Affected:
5.6
Unaffected: 0 , < 5.6 (semver) Unaffected: 5.10.253 , ≤ 5.10.* (semver) Unaffected: 5.15.203 , ≤ 5.15.* (semver) Unaffected: 6.1.167 , ≤ 6.1.* (semver) Unaffected: 6.6.130 , ≤ 6.6.* (semver) Unaffected: 6.12.78 , ≤ 6.12.* (semver) Unaffected: 6.18.19 , ≤ 6.18.* (semver) Unaffected: 6.19.9 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix) |
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}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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