Vulnerability · Published Mar 26, 2026 · Assigned by redhat
CVE-2026-0968Libssh: libssh: denial of service due to malformed sftp message
Low 3.1
In plain English
A low-severity null pointer dereference 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 0.5% (higher than 40% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
A flaw was found in libssh in which a malicious SFTP (SSH File Transfer Protocol) server can exploit this by sending a malformed 'longname' field within an `SSH_FXP_NAME` message during a file listing operation. This missing null check can lead to reading beyond allocated memory on the heap. This can cause unexpected behavior or lead to a denial of service (DoS) due to application crashes.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:10 | libssh | 0.12.0-2.el10 | ALSA-2026:18160 |
| AlmaLinux:9 | libssh | 0.10.4-18.el9 | ALSA-2026:18683 |
| AlmaLinux:10 | libssh-config | 0.12.0-2.el10 | ALSA-2026:18160 |
| AlmaLinux:9 | libssh-config | 0.10.4-18.el9 | ALSA-2026:18683 |
| AlmaLinux:10 | libssh-devel | 0.12.0-2.el10 | ALSA-2026:18160 |
| AlmaLinux:9 | libssh-devel | 0.10.4-18.el9 | ALSA-2026:18683 |
| Alpine:v3.23 | libssh | 0.11.4-r0 | ALPINE-CVE-2026-0968 |
| Alpine:v3.24 | libssh | 0.12.0-r0 | ALPINE-CVE-2026-0968 |
| Debian:12 | libssh | 0.10.6-0+deb12u3 | DEBIAN-CVE-2026-0968 |
| Debian:13 | libssh | 0.11.5-0+deb13u1 | DEBIAN-CVE-2026-0968 |
| Debian:14 | libssh | 0.12.0-1 | DEBIAN-CVE-2026-0968 |
| Rocky Linux:10 | libssh | 0:0.12.0-2.el10 | RLSA-2026:18160 |
| Rocky Linux:9 | libssh | 0:0.10.4-18.el9 | RLSA-2026:18683 |
| Ubuntu:22.04:LTS | libssh | 0.9.6-2ubuntu0.22.04.6 | UBUNTU-CVE-2026-0968 |
| Ubuntu:22.04:LTS | libssh | 0.9.6-2ubuntu0.22.04.6 | USN-8051-1 |
| Ubuntu:24.04:LTS | libssh | 0.10.6-2ubuntu0.3 | USN-8051-1 |
| Ubuntu:24.04:LTS | libssh | 0.10.6-2ubuntu0.3 | UBUNTU-CVE-2026-0968 |
| Ubuntu:25.10 | libssh | 0.11.2-1ubuntu0.2 | UBUNTU-CVE-2026-0968 |
| Ubuntu:25.10 | libssh | 0.11.2-1ubuntu0.2 | USN-8051-1 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | see references |
| Red Hat | Red Hat Enterprise Linux 9 | see references |
| Red Hat | Red Hat Enterprise Linux 9 | 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 Hardened Images | see references |
| Red Hat | Red Hat OpenShift Container Platform 4 | see references |
| Red Hat | Red Hat OpenShift Container Platform 4 | see references |
Weakness: CWE-476 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L
References
- RHSA-2026:18160 vendor-advisory, x_refsource_REDHAT
- RHSA-2026:18683 vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2026-0968 vdb-entry, x_refsource_REDHAT
- RHBZ#2436982 issue-tracking, x_refsource_REDHAT
- https://www.libssh.org/2026/02/10/libssh-0-12-0-and-0-11-4-security-releases/