CVE-2026-23456

HIGH EPSS 35.4%
Published Apr 3, 20262mo ago · Modified Jun 17, 20261w ago
8.2 CVSS 3.1
High
Find Similar
Published Apr 3, 2026 2mo ago
Last Modified Jun 17, 2026 1w ago

Description

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().

CVSS Details

Base Score
8.2
Exploitability
3.9
Impact
4.2
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Low
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
35.4% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-125 Out-of-bounds Read Memory Safety

Affected Products 11

VendorProductVersionRange
linuxlinux_kernel*≥2.6.17  –  <5.10.253
linuxlinux_kernel*≥5.11  –  <5.15.203
linuxlinux_kernel*≥5.16  –  <6.1.167
linuxlinux_kernel*≥6.2  –  <6.6.130
linuxlinux_kernel*≥6.7  –  <6.12.78
linuxlinux_kernel*≥6.13  –  <6.18.20
linuxlinux_kernel*≥6.19  –  <6.19.10
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any

References 8

  • git.kernel.org https://git.kernel.org/stable/c/1e3a3593162c96e8a8de48b1e14f60c3b57fca8a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/41b417ff73a24b2c68134992cc44c88db27f482d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/52235bf88159a1ef16434ab49e47e99c8a09ab20
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6bce72daeccca9aa1746e92d6c3d4784e71f2ebb
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/774a434f8c9c8602a976b2536f65d0172a07f4d2
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a2cd54b9348e485d338b3c132338a4410c99afaf
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c95dc674ebf01ecfb40388b6facfc89b81fed3b7
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/fb6c3596823ec5dd09c2123340330d7448f51a59
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/1e3a3593162c96e8a8de48b1e14f60c3b57fca8a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/41b417ff73a24b2c68134992cc44c88db27f482d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/52235bf88159a1ef16434ab49e47e99c8a09ab20
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6bce72daeccca9aa1746e92d6c3d4784e71f2ebb
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/774a434f8c9c8602a976b2536f65d0172a07f4d2
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a2cd54b9348e485d338b3c132338a4410c99afaf
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c95dc674ebf01ecfb40388b6facfc89b81fed3b7
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/fb6c3596823ec5dd09c2123340330d7448f51a59
    Patch