Vulnerability · Published Jul 29, 2026 · Assigned by suse
CVE-2026-55995Double-free in the iSNS attribute decoder in open-iscsi
High 8.7
In plain English
A high-severity double free in open-iscsi from open-iscsi. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 17% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 4.0)8.7High
Exploit odds (30 days)0.3%top 83.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
A Double Free vulnerability in open-iscsi allows an unauthenticated MITM attacker to cause DoS. This issue affects open-iscsi: from ? through 56718d4e9d1a4f51c30697b5c0534144bb41c9bb.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:10 | isns-utils | 0.103-1.el10_2.1 | ALSA-2026:53846 |
| AlmaLinux:8 | isns-utils | 0.99-1.el8_10.1 | ALSA-2026:53848 |
| AlmaLinux:9 | isns-utils | 0.101-4.el9_8.1 | ALSA-2026:53847 |
| AlmaLinux:8 | isns-utils-devel | 0.99-1.el8_10.1 | ALSA-2026:53848 |
| AlmaLinux:10 | isns-utils-libs | 0.103-1.el10_2.1 | ALSA-2026:53846 |
| AlmaLinux:8 | isns-utils-libs | 0.99-1.el8_10.1 | ALSA-2026:53848 |
| AlmaLinux:9 | isns-utils-libs | 0.101-4.el9_8.1 | ALSA-2026:53847 |
| Debian:12 | open-isns | no fix listed | DEBIAN-CVE-2026-55995 |
| Debian:13 | open-isns | no fix listed | DEBIAN-CVE-2026-55995 |
| Debian:14 | open-isns | 0.103-2 | DEBIAN-CVE-2026-55995 |
| Rocky Linux:10 | isns-utils | 0:0.103-1.el10_2.1 | RLSA-2026:53846 |
| Rocky Linux:8 | isns-utils | 0:0.99-1.el8_10.1 | RLSA-2026:53848 |
| Rocky Linux:9 | isns-utils | 0:0.101-4.el9_8.1 | RLSA-2026:53847 |
| Ubuntu:22.04:LTS | open-iscsi | no fix listed | UBUNTU-CVE-2026-55995 |
| Ubuntu:24.04:LTS | open-iscsi | no fix listed | UBUNTU-CVE-2026-55995 |
| Ubuntu:26.04:LTS | open-iscsi | no fix listed | UBUNTU-CVE-2026-55995 |
| Ubuntu:26.10 | open-iscsi | no fix listed | UBUNTU-CVE-2026-55995 |
| Ubuntu:22.04:LTS | open-isns | 0.101-0ubuntu2.1 | UBUNTU-CVE-2026-55995 |
| Ubuntu:22.04:LTS | open-isns | 0.101-0ubuntu2.1 | USN-8807-1 |
| Ubuntu:24.04:LTS | open-isns | 0.101-0.3ubuntu0.1 | UBUNTU-CVE-2026-55995 |
| Ubuntu:24.04:LTS | open-isns | 0.101-0.3ubuntu0.1 | USN-8807-1 |
| Ubuntu:26.04:LTS | open-isns | 0.101-2.1ubuntu0.1 | USN-8807-1 |
| Ubuntu:26.04:LTS | open-isns | 0.101-2.1ubuntu0.1 | UBUNTU-CVE-2026-55995 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| open-iscsi | open-iscsi | ? – through 56718d4e9d1a4f51c30697b5c0534144bb41c9bb |
Weakness: CWE-415 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N