CLSA-2026-1785837198
See a problem?- Import Source
- https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu20.04els/CLSA-2026-1785837198.json
- JSON Data
- https://api.osv.dev/v1/vulns/CLSA-2026-1785837198
- Upstream
- CVE-2026-59850
- Published
- 2026-08-04T09:53:28Z
- Modified
- 2026-10-26T09:30:09Z
- Summary
- Fix CVE(s): CVE-2026-59850
- Details
-
- SECURITY UPDATE: use-after-free in channel_rcv_data() when a peer sends
DATA on a channel it has already closed
- debian/patches/CVE-2026-59850.patch: reject DATA packets on channels already closed by the remote peer (SSH_CHANNEL_FLAG_CLOSED_REMOTE) in channel_rcv_data(), and additionally drop the callback list in ssh_channel_free() so DATA arriving between a local free and the peer's CLOSE can no longer dispatch callbacks on a released channel, both in src/channels.c
- CVE-2026-59850
- SECURITY UPDATE: use-after-free in channel_rcv_data() when a peer sends
DATA on a channel it has already closed
- References
Affected packages
TuxCare:Ubuntu:20.04 / libssh-4
Package
- Name
- libssh-4
- Purl
- pkg:deb/tuxcare/libssh-4?distro=ubuntu-20.04
TuxCare:Ubuntu:20.04 / libssh-dev
Package
- Name
- libssh-dev
- Purl
- pkg:deb/tuxcare/libssh-dev?distro=ubuntu-20.04
TuxCare:Ubuntu:20.04 / libssh-doc
Package
- Name
- libssh-doc
- Purl
- pkg:deb/tuxcare/libssh-doc?distro=ubuntu-20.04
TuxCare:Ubuntu:20.04 / libssh-gcrypt-4
Package
- Name
- libssh-gcrypt-4
- Purl
- pkg:deb/tuxcare/libssh-gcrypt-4?distro=ubuntu-20.04