CVE-2026-23456Out-of-bounds Read in Linux

CWE-125Out-of-bounds Read6 documents6 sources
Severity
6.4MEDIUM
No vector
EPSS
0.0%
top 90.94%
CISA KEV
Not in KEV
Exploit
No known exploits
Timeline
PublishedApr 3

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

Affected Packages3 packages

Debianlinux/linux_kernel< 6.19.10-1
CVEListV5linux/linux5e35941d990123f155b02d5663e51a24f816b6f341b417ff73a24b2c68134992cc44c88db27f482d+6
debiandebian/linux< linux 6.19.10-1 (forky)

🔴Vulnerability Details

2
OSV
CVE-2026-23456: In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_conntrack_h323: fix OOB read in decode_int() CONS case In decode_int2026-04-03
GHSA
GHSA-qgh9-fcm6-v6pg: In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_conntrack_h323: fix OOB read in decode_int() CONS case In decode_i2026-04-03

📋Vendor Advisories

2
Red Hat
kernel: netfilter: nf_conntrack_h323: fix OOB read in decode_int() CONS case2026-04-03
Debian
CVE-2026-23456: linux - In the Linux kernel, the following vulnerability has been resolved: netfilter: ...2026

🕵️Threat Intelligence

1
Wiz
CVE-2026-23456 Impact, Exploitability, and Mitigation Steps | Wiz