USN-7455-5: Linux kernel (AWS) vulnerabilities
Jann Horn discovered that the watchqueue event notification subsystem in the Linux kernel contained an out-of-bounds write vulnerability. A local attacker could use this to cause a denial of service (system crash) or escalate their privileges. (CVE-2022-0995)
Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems: - iSCSI Boot Firmware Table Attributes driver; - Network drivers; - File systems infrastructure; - NTFS3 file system; - Ethernet bridge; - Ethtool driver; - IPv6 networking; - Network traffic control; - VMware vSockets driver; (CVE-2024-26837, CVE-2025-21993, CVE-2025-21702, CVE-2024-50248, CVE-2024-46826, CVE-2024-50256, CVE-2025-21703, CVE-2025-21700, CVE-2025-21756, CVE-2025-21701, CVE-2024-56651)
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
ubuntu/linux-image-5.15.0-1082-awsto a version that resolves this vulnerability.Fixed in 5.15.0-1082.89~20.04.1 - Upgrade
Upgrade
ubuntu/linux-image-awsto a version that resolves this vulnerability.Fixed in 5.15.0.1082.89~20.04.1 - Upgrade
Upgrade
ubuntu/linux-aws-5.15to a version that resolves this vulnerability.Fixed in 5.15.0-1082.89~20.04.1 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Patch USN-7455-5
Event History
Child vulnerabilities
Contains the following vulnerabilities.
- CVE-2025-21993
- CVE-2025-21756
- CVE-2025-21703
- CVE-2025-21702
- CVE-2025-21701
- CVE-2025-21700
- CVE-2024-56651
- CVE-2024-50256
- CVE-2024-50248
- CVE-2024-46826
- CVE-2022-0995
- CVE-2024-26837
- UBUNTU-CVE-2022-0995
- UBUNTU-CVE-2024-26837
- UBUNTU-CVE-2024-46826
- UBUNTU-CVE-2024-50248
- UBUNTU-CVE-2024-50256
- UBUNTU-CVE-2024-56651
- UBUNTU-CVE-2025-21700
- UBUNTU-CVE-2025-21701
- UBUNTU-CVE-2025-21702
- UBUNTU-CVE-2025-21703
- UBUNTU-CVE-2025-21756
- UBUNTU-CVE-2025-21993
Frequently Asked Questions
What is the severity of USN-7455-5?
The severity of USN-7455-5 is considered high due to the potential for denial of service and privilege escalation.
How do I fix USN-7455-5?
To resolve USN-7455-5, update your Linux kernel to version 5.15.0-1082.89~20.04.1 or later.
What systems are affected by USN-7455-5?
USN-7455-5 affects Ubuntu 20.04 users running specific versions of the Linux kernel.
Can USN-7455-5 be exploited remotely?
USN-7455-5 requires local access to exploit, meaning an attacker must have local user privileges.
What type of vulnerability is USN-7455-5?
USN-7455-5 is an out-of-bounds write vulnerability affecting the watch_queue event notification subsystem.