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SUSE: libssh Important Security Patch 2025:20596-1 with Risk Management

suse
Calendar Grey August 29, 2025
Dist Suse Esm H88
Critical security enhancement for libssh in SUSE resolving several flaws. Apply suggested updates right away.
* bsc#1245309 * bsc#1245310 * bsc#1245311 * bsc#1245312 * bsc#1245314

Summary

## This update for libssh fixes the following issues: * CVE-2025-5372: ssh_kdf() returns a success code on certain failures (bsc#1245314) * CVE-2025-5987: Invalid return code for chacha20 poly1305 with OpenSSL backend (bsc#1245317) * CVE-2025-4877: Write beyond bounds in binary to base64 conversion functions (bsc#1245309) * CVE-2025-4878: Use of uninitialized variable in privatekey_from_file() (bsc#1245310) * CVE-2025-5318: Likely read beyond bounds in sftp server handle management (bsc#1245311) * CVE-2025-5351: Double free in functions exporting keys (bsc#1245312) ## Patch Instructions: To install this SUSE update use the SUSE recommended installation methods like YaST online_update or "zypper patch". Alternatively you can run the command listed for your product: * SUSE Linux Micro 6.1

Topics%20covered

Topics Covered

security advisory denial of service security issue SuSE important libssh

References

* bsc#1245309

* bsc#1245310

* bsc#1245311

* bsc#1245312

* bsc#1245314

* bsc#1245317

Cross-

* CVE-2025-4877

* CVE-2025-4878

* CVE-2025-5318

* CVE-2025-5351

* CVE-2025-5372

* CVE-2025-5987

CVSS scores:

* CVE-2025-4877 ( SUSE ): 2.0

CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N

* CVE-2025-4877 ( SUSE ): 4.5 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L

* CVE-2025-4877 ( NVD ): 4.5 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L

* CVE-2025-4878 ( SUSE ): 2.0

CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

* CVE-2025-4878 ( SUSE ): 3.6 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N

* CVE-2025-4878 ( NVD ): 3.6 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N

* CVE-2025-5318 ( SUSE ): 5.3

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2025:20596-1
Release Date: 2025-08-14T10:19:26Z
Rating: important

Topics%20covered

Topics Covered

security advisory denial of service security issue SuSE important libssh

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