CVE-2026-3842

Impact

A flaw was found in QEMU. This vulnerability allows a local attacker within a guest virtual machine to write data beyond its allocated memory. This occurs when cpu_physical_memory_map() returns a shorter length than expected, leading to an out-of-bounds write. Successful exploitation could result in unauthorized access to guest memory or corruption of heap-allocated objects, potentially causing information disclosure, data integrity issues, or a denial of service.

Affected packages

This record carries no package version data, so it cannot be matched against a dependency list automatically. Read the advisory and compare your version by hand.

Weakness classification

References

• NVD record
• CVE.org record
• https://access.redhat.com/security/cve/CVE-2026-3842
• https://bugzilla.redhat.com/show_bug.cgi?id=2458150
• https://access.redhat.com/security/cve/CVE-2026-3842
• https://bugzilla.redhat.com/show_bug.cgi?id=2458150
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-3842.json