CVE-2023-45236 — Sensitive Information Exposure in Edk2

CWE-200 — Sensitive Information ExposureCWE-338 — Use of Cryptographically Weak Pseudo-Random Number Generator11 documents8 sources
Severity
7.5HIGHNVD
CNA5.8OSV7.4
EPSS
0.4%
top 40.77%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
1
Tianocore Edk2
Timeline
PublishedJan 16
Latest updateNov 28

Description

EDK2's Network Package is susceptible to a predictable TCP Initial Sequence Number. This vulnerability can be exploited by an attacker to gain unauthorized access and potentially lead to a loss of Confidentiality.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:NExploitability: 3.9 | Impact: 3.6

Affected Packages4 packages

▶Debiantianocore/edk2< 2024.05-1+1
▶Ubuntutianocore/edk2< 2022.02-3ubuntu0.22.04.5+3
▶NVDtianocore/edk2202311
▶CVEListV5tianocore/edk2edk2-stable202308

🔴Vulnerability Details

5
OSV
edk2 regression↗2025-11-28
▶
OSV
edk2 vulnerabilities↗2025-11-26
▶
CVEList
Predictable TCP ISNs in EDK II Network Package↗2024-01-16
▶
GHSA
GHSA-fqc4-ffq5-4r98: EDK2's Network Package is susceptible to a predictable TCP Initial Sequence Number↗2024-01-16
▶
OSV
CVE-2023-45236: EDK2's Network Package is susceptible to a predictable TCP Initial Sequence Number↗2024-01-16
▶

📋Vendor Advisories

5
Ubuntu
EDK II regression↗2025-11-28
▶
Ubuntu
EDK II vulnerabilities↗2025-11-26
▶
Red Hat
edk2: Predictable TCP Initial Sequence Numbers↗2024-01-16
▶
Microsoft
Predictable TCP ISNs in EDK II Network Package↗2024-01-09
▶
Debian
CVE-2023-45236: edk2 - EDK2's Network Package is susceptible to a predictable TCP Initial Sequence Numb...↗2023
▶
CVE-2023-45236 — Sensitive Information Exposure in Edk2 | cvebase