CVE-2026-59850: Use After Free in Red Hat Red Hat Enterprise Linux 10
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.
AI Analysis
Technical Summary
CVE-2026-59850 describes a use-after-free flaw in libssh within Red Hat Enterprise Linux 10. Specifically, if data packets are processed after the associated SSH channel has been closed, channel data callbacks may be invoked referencing memory that has already been freed. This can cause application crashes or other instability. The vulnerability has been publicly disclosed but no vendor advisory indicates an available fix or workaround at this time.
Potential Impact
The vulnerability can cause denial of service through application crashes due to use-after-free conditions. There is no indication of confidentiality or integrity impact. No known exploits are reported in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the Red Hat advisory at https://access.redhat.com/security/cve/CVE-2026-59850 for current remediation guidance. Until a fix is available, cautious use of libssh-dependent services is advised.
CVE-2026-59850: Use After Free in Red Hat Red Hat Enterprise Linux 10
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.
CVSS v3.1
Score 4.3medium
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-59850 describes a use-after-free flaw in libssh within Red Hat Enterprise Linux 10. Specifically, if data packets are processed after the associated SSH channel has been closed, channel data callbacks may be invoked referencing memory that has already been freed. This can cause application crashes or other instability. The vulnerability has been publicly disclosed but no vendor advisory indicates an available fix or workaround at this time.
Potential Impact
The vulnerability can cause denial of service through application crashes due to use-after-free conditions. There is no indication of confidentiality or integrity impact. No known exploits are reported in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the Red Hat advisory at https://access.redhat.com/security/cve/CVE-2026-59850 for current remediation guidance. Until a fix is available, cautious use of libssh-dependent services is advised.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- redhat
- Date Reserved
- 2026-07-07T15:40:24.561Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://access.redhat.com/security/cve/CVE-2026-59850","vendor":"Red Hat"}]
Threat ID: 6a5f856d2a4a8d59894725a7
Added to database: 07/21/2026, 14:42:53 UTC
Last enriched: 07/21/2026, 14:58:04 UTC
Last updated: 07/21/2026, 21:15:11 UTC
Views: 5
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