CVE-2026-59850 — Security Box Score

CVE · referencelatest edition

Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-59850HIGH

Red Hat Red Hat Enterprise Linux 10 — Libssh: libssh: use-after-free via data callbacks on closed channels

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   N  U  N  N  H    7.5   .0032   25.1     —

AFFECTED
  Product                      Versions     Fixed
  Red Hat Enterprise Linux 10  unspecified  0:0.12.0-3.el10_2
  Red Hat Hardened Images      unspecified  0.12.1-4.hum1
  Red Hat Enterprise Linux 8   unspecified  —
  Red Hat Enterprise Linux 9   unspecified  —

TIMELINE
  Jul 7   Reserved by redhat
  Jul 21  Published (CNA: redhat)
  Aug 17  RESCORED — CVE-2026-59850 (Red Hat Enterprise Linux 10). CVSS 4.3 → 7.5 (NVD).

CWE-416 · CNA: redhat · CVSS v3.1 · 4 references · NVD status: Modified

Description

A flaw was found in libssh. If data packets are processed after a channel is closed, channel data callbacks can be invoked after the associated data has already been freed, leading to crashes or possible use-after-free conditions.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
July 7, 2026	Reserved	Reserved by redhat
July 21, 2026	Published	Published (CNA: redhat)
August 17, 2026	RESCORED	RESCORED — CVE-2026-59850 (Red Hat Enterprise Linux 10). CVSS 4.3 → 7.5 (NVD).

Affected

Affected products and packages — 4 rows
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
Red Hat	Red Hat Enterprise Linux 10	—	—	0:0.12.0-3.el10_2
Red Hat	Red Hat Hardened Images	—	—	0.12.1-4.hum1
Red Hat	Red Hat Enterprise Linux 8	—	—	—
Red Hat	Red Hat Enterprise Linux 9	—	—	—

Weaknesses

CWE-416

References (4)

https://access.redhat.com/errata/RHSA-2026:42922 [vendor-advisory, x_refsource_REDHAT]
https://access.redhat.com/errata/RHSA-2026:55855 [vendor-advisory, x_refsource_REDHAT]
https://access.redhat.com/security/cve/CVE-2026-59850 [vdb-entry, x_refsource_REDHAT]
https://bugzilla.redhat.com/show_bug.cgi?id=2498183 [issue-tracking, x_refsource_REDHAT]

Authoritative record: CVE-2026-59850 at cve.org

Vendors: red hat

Weaknesses: CWE-416

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-59850 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.