CVE-2026-43453 (GCVE-0-2026-43453)
Vulnerability from cvelistv5
Published
2026-05-08 14:22
Modified
2026-05-11 22:24
Severity ?
VLAI Severity ?
EPSS score ?
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.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Version: 3c4287f62044a90e73a561aa05fc46e62da173da Version: 3c4287f62044a90e73a561aa05fc46e62da173da Version: 3c4287f62044a90e73a561aa05fc46e62da173da Version: 3c4287f62044a90e73a561aa05fc46e62da173da Version: 3c4287f62044a90e73a561aa05fc46e62da173da Version: 3c4287f62044a90e73a561aa05fc46e62da173da Version: 3c4287f62044a90e73a561aa05fc46e62da173da Version: 3c4287f62044a90e73a561aa05fc46e62da173da |
||
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"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nft_set_pipapo: fix stack out-of-bounds read in pipapo_drop()\n\npipapo_drop() passes rulemap[i + 1].n to pipapo_unmap() as the\nto_offset argument on every iteration, including the last one where\ni == m-\u003efield_count - 1. This reads one element past the end of the\nstack-allocated rulemap array (declared as rulemap[NFT_PIPAPO_MAX_FIELDS]\nwith NFT_PIPAPO_MAX_FIELDS == 16).\n\nAlthough pipapo_unmap() returns early when is_last is true without\nusing the to_offset value, the argument is evaluated at the call site\nbefore the function body executes, making this a genuine out-of-bounds\nstack read confirmed by KASAN:\n\n BUG: KASAN: stack-out-of-bounds in pipapo_drop+0x50c/0x57c [nf_tables]\n Read of size 4 at addr ffff8000810e71a4\n\n This frame has 1 object:\n [32, 160) \u0027rulemap\u0027\n\n The buggy address is at offset 164 -- exactly 4 bytes past the end\n of the rulemap array.\n\nPass 0 instead of rulemap[i + 1].n on the last iteration to avoid\nthe out-of-bounds read."
}
],
"providerMetadata": {
"dateUpdated": "2026-05-11T22:24:52.944Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
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"references": [
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"url": "https://git.kernel.org/stable/c/1957e793196e7f8557374fd4eda53abcbb42e1c0"
},
{
"url": "https://git.kernel.org/stable/c/57fb87ca095d5127cd7a27583b8ec43dcf7c9e9e"
},
{
"url": "https://git.kernel.org/stable/c/60c1d18781e37bfb96290b86510eb01c5fa24d75"
},
{
"url": "https://git.kernel.org/stable/c/0a55d62cdb628923d8a21724374a70c76ac7d19d"
},
{
"url": "https://git.kernel.org/stable/c/dfbdac719198778b581bc0dd055df2542edb8c62"
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{
"url": "https://git.kernel.org/stable/c/e047f6fbb975f685d6c9fcef95b3b7787a79b46d"
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"url": "https://git.kernel.org/stable/c/324b749aa5b2d516ccfab933df9d3f56e7807f5f"
},
{
"url": "https://git.kernel.org/stable/c/d6d8cd2db236a9dd13dbc2d05843b3445cc964b5"
}
],
"title": "netfilter: nft_set_pipapo: fix stack out-of-bounds read in pipapo_drop()",
"x_generator": {
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}
},
"cveMetadata": {
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"assignerShortName": "Linux",
"cveId": "CVE-2026-43453",
"datePublished": "2026-05-08T14:22:18.087Z",
"dateReserved": "2026-05-01T14:12:56.010Z",
"dateUpdated": "2026-05-11T22:24:52.944Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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