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Vulnerability · Published Oct 23, 2026 · Assigned by redhat

CVE-2026-115485Open-iscsi: open-iscsi: dhcpv6 vendor option strlen heap out-of-bounds read and 1-byte write in iscsiuio

Medium 6.3

In plain English

A medium-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 10% of all known vulnerabilities).

Severity (CVSS 3.1)6.3Medium
Exploit odds (30 days)0.2%top 90.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

A flaw was found in the iscsiuio component of open-iscsi. The DHCPv6 option parser calls strlen() on raw network data without ensuring a NUL terminator is present, causing it to read past the buffer into heap memory. This can result in a daemon crash, a 1-byte heap overwrite, or corruption of the iSCSI initiator name. An attacker on the same network segment can trigger this by sending a crafted DHCPv6 Advertise message.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12open-iscsino fix listedDEBIAN-CVE-2026-115485
Debian:13open-iscsino fix listedDEBIAN-CVE-2026-115485
Debian:14open-iscsino fix listedDEBIAN-CVE-2026-115485
Ubuntu:22.04:LTSopen-iscsino fix listedUBUNTU-CVE-2026-115485
Ubuntu:24.04:LTSopen-iscsino fix listedUBUNTU-CVE-2026-115485
Ubuntu:26.04:LTSopen-iscsino fix listedUBUNTU-CVE-2026-115485
Ubuntu:26.10open-iscsino fix listedUBUNTU-CVE-2026-115485

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 9 see references

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

References