CVE-2026-55995
CVE-2026-55995: 1 tracked advisory record across Red Hat. Compare source-reported impact, fixes and remediation.
Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.
Vendor advisory comparison
Red Hat
1 advisory- Advisory severityHigh7.5
High [CVE-2026-55995] Denial of Service via double-free in iSNS attribute decoder
CVE-2026-55995Source published Source updated
A Double Free vulnerability in open-iscsi allows an unauthenticated MITM attacker to cause DoS. This issue affects open-iscsi: from? through 56718d4e9d1a4f51c30697b5c0534144bb41c9bb. An unauthenticated man-in-the-middle (MITM) attacker can exploit a double-free vulnerability in the iSNS attribute decoder. This can lead to a denial of service (DoS) condition, making the affected system unavailable. The vulnerability is network-exploitable without requiring user interaction or authentication, posing a significant risk to the availability of iSNS services in environments where the `isns-utils` package is deployed and the iSNS service is exposed. Red Hat severity: Important — CVSS 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H). Weakness: CWE-763.
- Affected products in this advisory
- Red Hat Enterprise Linux 10.0 Extended Update Support
- Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
- Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On
- Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
7 more entries in the full advisory.
- Source-reported affected versions
- Affected-version details not available in this record.
- Source-reported fixed versions
- isns-utils-0:0.103-1.el10_2.1
- isns-utils-0:0.103-1.el10_0.1
- isns-utils-0:0.99-1.el8_10.1
- isns-utils-0:0.99-1.el8_4.1
16 more entries in the full advisory.
- Mitigation guidance
- If the iSNS service is not actively used, disable it to prevent exploitation. To disable the `isnsd` service, execute `systemctl disable --now isnsd`. If the iSNS service is required, restrict network access to UDP port 3260 to only trusted hosts and networks using firewall rules. A service restart may be required for changes to take effect.
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