Red HatCVE-2026-59850
Red Hat libssh: use after free
Medium4.3CVE-2026-59850 · Published Jul 21, 2026 · updated Sep 1, 2026
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.
Affected versions
The source does not list versions here. See the source advisory for affected products and fixes.
Details and references
- CVSS 3.1
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-416
- www.cve.org/CVERecord?id=CVE-2026-59850
- nvd.nist.gov/vuln/detail/CVE-2026-59850
- access.redhat.com/errata/RHSA-2026:42922
- access.redhat.com/errata/RHSA-2026:55855
- access.redhat.com/errata/RHSA-2026:62217
- access.redhat.com/errata/RHSA-2026:62218
- access.redhat.com/security/cve/CVE-2026-59850
- bugzilla.redhat.com/show_bug.cgi?id=2498183
More Red Hat advisories
All Red Hat| Date | Advisory | Severity | Fixed in |
|---|---|---|---|
| Jul 21 | Red Hat libarchive: integer overflow | Low2.9 | No fix yet |
| Jul 21 | Red Hat Enterprise Linux 10: information disclosure | Low3.4 | No fix yet |
| Jul 21 | Red Hat Enterprise Linux 10: out-of-bounds read | Medium4.2 | No fix yet |
| Jul 21 | Red Hat ansible-core: argument injection | High7.8 | No fix yet |
| Jul 21 | Red Hat libssh. Logic errors: denial of service | Low3.1 | No fix yet |
| Jul 21 | Red Hat libssh. On: improper authorization | High8.8 | No fix yet |