USN-8722-1: libssh2 vulnerabilities

It was discovered that libssh2 incorrectly handled certain SFTP server responses. A remote attacker controlling an SSH server could use this issue to cause libssh2 to crash or possibly execute arbitrary code. CVE-2026-66032 It was discovered that libssh2 incorrectly handled AES-GCM cipher...

libssh security update

An update is available for libssh. This update affects Rocky Linux 8. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from the CVE list libssh is a library which implements the SSH protocol. It can be used to...

CVE-2026-84268

A flaw was found in the SFTP backend in gvfs. When mounting a share an...

CVE-2026-84267

A flaw was found in the SFTP backend in gvfs. When mounting a share, a...

UBUNTU-CVE-2026-84267

A flaw was found in the SFTP backend in gvfs. When mounting a share, a...

UBUNTU-CVE-2026-84268

A flaw was found in the SFTP backend in gvfs. When mounting a share an...

CVE-2021-38312

creationtimestamp| type| source ---|---|--- 2026-09-01 20:02:25+00:00| seen| https://t.me/hackingAttack/22318 2026-09-02 01:02:59+00:00| seen| https://t.me/hackingAttack/22318 2026-09-07 18:00:05+00:00| seen| https://t.me/hackingAttack/22318 2026-09-08 00:00:37+00:00| seen|...

libssh: libssh: denial of service via SFTP responses with unknown request IDs

A flaw was found in libssh. A malicious SFTP server can send responses for unknown request IDs that libssh clients keep queued indefinitely, causing unbounded memory growth and client-side denial of service...

libssh: libssh: denial of service via oversized SFTP read length

A flaw was found in libssh. A remote authenticated client can issue SSHFXPREAD requests with an arbitrarily large length, causing a libssh SFTP server to allocate excessive memory and potentially exhaust it through repeated requests...

Moderate: Red Hat Security Advisory: libssh security update

An update for libssh is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from the...

libssh: libssh: denial of service via SFTP responses with unknown request IDs

A flaw was found in libssh. A malicious SFTP server can send responses for unknown request IDs that libssh clients keep queued indefinitely, causing unbounded memory growth and client-side denial of service...

Moderate: Red Hat Security Advisory: libssh security update

An update for libssh is now available for Red Hat Enterprise Linux 9. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from the...

libssh: libssh: denial of service via oversized SFTP read length

A flaw was found in libssh. A remote authenticated client can issue SSHFXPREAD requests with an arbitrarily large length, causing a libssh SFTP server to allocate excessive memory and potentially exhaust it through repeated requests...

DEBIAN-CVE-2026-84267

A flaw was found in the SFTP backend in gvfs. When mounting a share, a malicious SFTP server can cause readstring to allocate a buffer with a certain length but the function does not verify that the buffer is completely filled, leaving the remainder of the buffer containing uninitialized heap...

CVE-2026-84267

A flaw was found in the SFTP backend in gvfs. When mounting a share, a malicious SFTP server can cause readstring to allocate a buffer with a certain length but the function does not verify that the buffer is completely filled, leaving the remainder of the buffer containing uninitialized heap...

CVE-2026-84268

A flaw was found in the SFTP backend in gvfs. When mounting a share and reading a file, a malicious SFTP server can cause readreply to process a length that exceeds the size requested by the client. The function does not verify the server-provided length against the allocated buffer size, causing...

DEBIAN-CVE-2026-84268

A flaw was found in the SFTP backend in gvfs. When mounting a share and reading a file, a malicious SFTP server can cause readreply to process a length that exceeds the size requested by the client. The function does not verify the server-provided length against the allocated buffer size, causing...

CVE-2026-84267 Gvfs: sftp: uninitialized heap disclosure in read_string()

A flaw was found in the SFTP backend in gvfs. When mounting a share, a malicious SFTP server can cause readstring to allocate a buffer with a certain length but the function does not verify that the buffer is completely filled, leaving the remainder of the buffer containing uninitialized heap...

CVE-2026-84267

A flaw was found in the SFTP backend in gvfs. When mounting a share, a malicious SFTP server can cause readstring to allocate a buffer with a certain length but the function does not verify that the buffer is completely filled, leaving the remainder of the buffer containing uninitialized heap...

EUVD-2026-69296

A flaw was found in the SFTP backend in gvfs. When mounting a share, a malicious SFTP server can cause readstring to allocate a buffer with a certain length but the function does not verify that the buffer is completely filled, leaving the remainder of the buffer containing uninitialized heap...