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Vulnerability · Published Nov 2, 2026 · Assigned by redhat

CVE-2026-120740Hivex: hivex: denial of service via out-of-bounds read in big-data block processing

Low 2.0

In plain English

A low-severity out-of-bounds read in Red Hat Enterprise Linux 10 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 15% of all known vulnerabilities).

Severity (CVSS 3.1)2.0Low
Exploit odds (30 days)0.2%top 85.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

A flaw was found in hivex. By supplying a specially crafted Windows registry hive file, an attacker can trigger an out-of-bounds memory read when hivex parses registry values containing malformed large data block lists. This issue can cause the application processing the registry file to crash, resulting in a Denial of Service (DoS).

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12hivexno fix listedDEBIAN-CVE-2026-120740
Debian:13hivexno fix listedDEBIAN-CVE-2026-120740
Debian:14hivexno fix listedDEBIAN-CVE-2026-120740
Ubuntu:22.04:LTShivexno fix listedUBUNTU-CVE-2026-120740
Ubuntu:24.04:LTShivexno fix listedUBUNTU-CVE-2026-120740
Ubuntu:26.04:LTShivexno fix listedUBUNTU-CVE-2026-120740
Ubuntu:26.10hivexno fix listedUBUNTU-CVE-2026-120740

Affected products (as reported)

VendorProductVersions
Red Hat Red Hat Enterprise Linux 10 see references
Red Hat Red Hat Enterprise Linux 6 see references
Red Hat Red Hat Enterprise Linux 7 see references
Red Hat Red Hat Enterprise Linux 8 see references
Red Hat Red Hat Enterprise Linux 8 see references
Red Hat Red Hat Enterprise Linux 9 see references

Weakness: CWE-125 · Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:N/A:L

References