CVE-2025-48774.5MediumCWE-787

CVE-2025-4877: Libssh: write beyond bounds in binary to base64 conversion functions

Redhat · libssh

Vendor fix available · Affected: Redhat libssh · Exploitation: unlikely (under 1%)

Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.

0.2%probability of exploitation in the next 30 days

12th percentile

050100

Higher than 12% of scored CVEs

4.5MediumCVSS 3.1

LowMediumHighCrit.

DescriptionCVE.org

There's a vulnerability in the libssh package where when a libssh consumer passes in an unexpectedly large input buffer to ssh_get_fingerprint_hash() function. In such cases the bin_to_base64() function can experience an integer overflow leading to a memory under allocation, when that happens it's possible that the program perform out of bounds write leading to a heap corruption. This issue affects only 32-bits builds of libssh.

Affected products9

From the CVE record. A product or version that is not listed is unknown, not unaffected.

libsshbefore 0.11.2
Red Hat · Red Hat Enterprise Linux 9Versions not stated
Red Hat · Red Hat Enterprise Linux 9Versions not stated
Red Hat · Red Hat Enterprise Linux 10Versions not stated
Red Hat · Red Hat Enterprise Linux 6Versions not stated
Red Hat · Red Hat Enterprise Linux 7Versions not stated
Red Hat · Red Hat Enterprise Linux 8Versions not stated
Red Hat · Red Hat OpenShift Container Platform 4Versions not stated
Red Hat · Red Hat OpenShift Container Platform 4Versions not stated

On the Atlas

Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.

Open the Atlas

Exploitation: Unlikely (under 1%). EPSS under 1%, or no score yet.
CISA KEV: Not listed
Public check: No public nuclei template
Weakness: Out-of-bounds Write · Memory Corruption
Vendor: Redhat
Published: August 2025
Band: Unlikely (under 1%), August 2025

CoverageNo articles yet

No CyberSIXT article names CVE-2025-4877 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.