Description
A flaw was found in the iscsiuio component of open-iscsi. The DHCPv4 option parser incorrectly calculates the length of the options data, causing it to read beyond the allocated buffer into adjacent heap memory. An attacker on the same network segment can send a crafted DHCP response to crash the daemon or corrupt its network configuration.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | — | — |
| Red Hat | Red Hat Enterprise Linux 6 | — | — |
| Red Hat | Red Hat Enterprise Linux 7 | — | — |
| Red Hat | Red Hat Enterprise Linux 8 | — | — |
| Red Hat | Red Hat Enterprise Linux 9 | — | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | open-iscsi | No fix yet | — |
| Debian 13 | open-iscsi | No fix yet | — |
| Debian 12 | open-iscsi | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | open-iscsi | No fix yet | — |
| Ubuntu 26.04 LTS | open-iscsi | No fix yet | — |
| Ubuntu 24.04 LTS | open-iscsi | No fix yet | — |
| Ubuntu 22.04 LTS | open-iscsi | No fix yet | — |
| Ubuntu 20.04 LTS | open-iscsi | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | open-iscsi | No fix yet | — |
| Ubuntu Pro 18.04 LTS | open-iscsi | No fix yet | — |
| Ubuntu Pro 16.04 LTS | open-iscsi | No fix yet | — |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | iscsi-initiator-utils | No fix yet | — |
References
- https://access.redhat.com/security/cve/CVE-2026-115484 vdb-entry
- RHBZ#2556265 issue-tracking