CVE-2026-23456 (GCVE-0-2026-23456)
Vulnerability from cvelistv5 – Published: 2026-04-03 15:15 – Updated: 2026-04-18 08:59
VLAI?
Title
netfilter: nf_conntrack_h323: fix OOB read in decode_int() CONS case
Summary
In the Linux kernel, the following vulnerability has been resolved:
netfilter: nf_conntrack_h323: fix OOB read in decode_int() CONS case
In decode_int(), the CONS case calls get_bits(bs, 2) to read a length
value, then calls get_uint(bs, len) without checking that len bytes
remain in the buffer. The existing boundary check only validates the
2 bits for get_bits(), not the subsequent 1-4 bytes that get_uint()
reads. This allows a malformed H.323/RAS packet to cause a 1-4 byte
slab-out-of-bounds read.
Add a boundary check for len bytes after get_bits() and before
get_uint().
Severity ?
No CVSS data available.
Assigner
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Linux | Linux |
Affected:
5e35941d990123f155b02d5663e51a24f816b6f3 , < a2cd54b9348e485d338b3c132338a4410c99afaf
(git)
Affected: 5e35941d990123f155b02d5663e51a24f816b6f3 , < c95dc674ebf01ecfb40388b6facfc89b81fed3b7 (git) Affected: 5e35941d990123f155b02d5663e51a24f816b6f3 , < 41b417ff73a24b2c68134992cc44c88db27f482d (git) Affected: 5e35941d990123f155b02d5663e51a24f816b6f3 , < 52235bf88159a1ef16434ab49e47e99c8a09ab20 (git) Affected: 5e35941d990123f155b02d5663e51a24f816b6f3 , < 774a434f8c9c8602a976b2536f65d0172a07f4d2 (git) Affected: 5e35941d990123f155b02d5663e51a24f816b6f3 , < 6bce72daeccca9aa1746e92d6c3d4784e71f2ebb (git) Affected: 5e35941d990123f155b02d5663e51a24f816b6f3 , < fb6c3596823ec5dd09c2123340330d7448f51a59 (git) Affected: 5e35941d990123f155b02d5663e51a24f816b6f3 , < 1e3a3593162c96e8a8de48b1e14f60c3b57fca8a (git) |
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{
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{
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}
],
"providerMetadata": {
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{
"url": "https://git.kernel.org/stable/c/1e3a3593162c96e8a8de48b1e14f60c3b57fca8a"
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"dateReserved": "2026-01-13T15:37:46.020Z",
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}
}
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Sightings
| Author | Source | Type | Date |
|---|
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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