CVE-2026-23456
netfilter: nf_conntrack_h323: fix OOB read in decode_int() CONS case
CVSS Score
8.2
EPSS Score
0.0%
EPSS Percentile
0th
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().
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Apr 3, 2026 |
| Last Updated | May 11, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
Linux / Linux
5e35941d990123f155b02d5663e51a24f816b6f3 < a2cd54b9348e485d338b3c132338a4410c99afaf 5e35941d990123f155b02d5663e51a24f816b6f3 < c95dc674ebf01ecfb40388b6facfc89b81fed3b7 5e35941d990123f155b02d5663e51a24f816b6f3 < 41b417ff73a24b2c68134992cc44c88db27f482d 5e35941d990123f155b02d5663e51a24f816b6f3 < 52235bf88159a1ef16434ab49e47e99c8a09ab20 5e35941d990123f155b02d5663e51a24f816b6f3 < 774a434f8c9c8602a976b2536f65d0172a07f4d2 5e35941d990123f155b02d5663e51a24f816b6f3 < 6bce72daeccca9aa1746e92d6c3d4784e71f2ebb 5e35941d990123f155b02d5663e51a24f816b6f3 < fb6c3596823ec5dd09c2123340330d7448f51a59 5e35941d990123f155b02d5663e51a24f816b6f3 < 1e3a3593162c96e8a8de48b1e14f60c3b57fca8a
Linux / Linux
2.6.17
References
git.kernel.org: https://git.kernel.org/stable/c/a2cd54b9348e485d338b3c132338a4410c99afaf git.kernel.org: https://git.kernel.org/stable/c/c95dc674ebf01ecfb40388b6facfc89b81fed3b7 git.kernel.org: https://git.kernel.org/stable/c/41b417ff73a24b2c68134992cc44c88db27f482d git.kernel.org: https://git.kernel.org/stable/c/52235bf88159a1ef16434ab49e47e99c8a09ab20 git.kernel.org: https://git.kernel.org/stable/c/774a434f8c9c8602a976b2536f65d0172a07f4d2 git.kernel.org: https://git.kernel.org/stable/c/6bce72daeccca9aa1746e92d6c3d4784e71f2ebb git.kernel.org: https://git.kernel.org/stable/c/fb6c3596823ec5dd09c2123340330d7448f51a59 git.kernel.org: https://git.kernel.org/stable/c/1e3a3593162c96e8a8de48b1e14f60c3b57fca8a