The CRC32C feature in the Btrfs implementation in the Linux kernel before 3.8-rc1 allows local users to cause a denial of service (prevention of file creation) by leveraging the ability to write to a directory important to the victim, and creating a file with a crafted name that is associated with a specific CRC32C hash value.

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-000717 advisory.

    The CRC32C feature in the Btrfs implementation in the Linux kernel before 3.8-rc1 allows local users to     cause a denial of service (prevention of file creation) by leveraging the ability to write to a directory     important to the victim, and creating a file with a crafted name that is associated with a specific CRC32C     hash value.

Tenable has extracted the preceding description block directly from the Unity Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-002420 advisory.

    The CRC32C feature in the Btrfs implementation in the Linux kernel before 3.8-rc1 allows local users to     cause a denial of service (prevention of file creation) by leveraging the ability to write to a directory     important to the victim, and creating a file with a crafted name that is associated with a specific CRC32C     hash value.

Tenable has extracted the preceding description block directly from the Unity Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-001921 advisory.

    The CRC32C feature in the Btrfs implementation in the Linux kernel before 3.8-rc1 allows local users to     cause a denial of service (prevention of file creation) by leveraging the ability to write to a directory     important to the victim, and creating a file with a crafted name that is associated with a specific CRC32C     hash value.

Tenable has extracted the preceding description block directly from the Unity Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

A denial of service flaw was discovered in the Btrfs file system in the Linux kernel. A local user could cause a denial of service by creating a large number of files with names that have the same CRC32 hash value. (CVE-2012-5374)

A denial of service flaw was discovered in the Btrfs file system in the Linux kernel. A local user could cause a denial of service (prevent file creation) for a victim, by creating a file with a specific CRC32C hash value in a directory important to the victim.
(CVE-2012-5375)

Dan Carpenter discovered an information leak in the HP Smart Aray and Compaq SMART2 disk-array driver in the Linux kernel. A local user could exploit this flaw to obtain sensitive information from kernel memory. (CVE-2013-2147).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

A denial of service flaw was discovered in the Btrfs file system in the Linux kernel. A local user could cause a denial of service by creating a large number of files with names that have the same CRC32 hash value. (CVE-2012-5374)

A denial of service flaw was discovered in the Btrfs file system in the Linux kernel. A local user could cause a denial of service (prevent file creation) for a victim, by creating a file with a specific CRC32C hash value in a directory important to the victim.
(CVE-2012-5375)

Vasily Kulikov discovered a flaw in the Linux Kernel's perf tool that allows specified to be run as root. A local could exploit this flaw to run commands as root when using the perf tool. user could exploit this (CVE-2013-1060)

A flaw was discovered in the Xen subsystem of the Linux kernel when it provides read-only access to a disk that supports TRIM or SCSI UNMAP to a guest OS. A privileged user in the guest OS could exploit this flaw to destroy data on the disk, even though the guest OS should not be able to write to the disk. (CVE-2013-2140)

A flaw was discovered in the Linux kernel when an IPv6 socket is used to connect to an IPv4 destination. An unprivileged local user could exploit this flaw to cause a denial of service (system crash).
(CVE-2013-2232)

An information leak was discovered in the IPSec key_socket implementation in the Linux kernel. An local user could exploit this flaw to examine potentially sensitive information in kernel memory.
(CVE-2013-2234)

Hannes Frederic Sowa discovered a flaw in setsockopt UDP_CORK option in the Linux kernel's IPv6 stack. A local user could exploit this flaw to cause a denial of service (system crash). (CVE-2013-4162)

Hannes Frederic Sowa discovered a flaw in the IPv6 subsystem of the Linux kernel when the IPV6_MTU setsockopt option has been specified in combination with the UDP_CORK option. A local user could exploit this flaw to cause a denial of service (system crash). (CVE-2013-4163).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

A denial of service flaw was discovered in the Btrfs file system in the Linux kernel. A local user could cause a denial of service by creating a large number of files with names that have the same CRC32 hash value. (CVE-2012-5374)

A denial of service flaw was discovered in the Btrfs file system in the Linux kernel. A local user could cause a denial of service (prevent file creation) for a victim, by creating a file with a specific CRC32C hash value in a directory important to the victim.
(CVE-2012-5375)

Vasily Kulikov discovered a flaw in the Linux Kernel's perf tool that allows for privilege escalation. A local user could exploit this flaw to run commands as root when using the perf tool. (CVE-2013-1060)

A flaw was discovered in the Xen subsystem of the Linux kernel when it provides read-only access to a disk that supports TRIM or SCSI UNMAP to a guest OS. A privileged user in the guest OS could exploit this flaw to destroy data on the disk, even though the guest OS should not be able to write to the disk. (CVE-2013-2140)

A flaw was discovered in the Linux kernel when an IPv6 socket is used to connect to an IPv4 destination. An unprivileged local user could exploit this flaw to cause a denial of service (system crash).
(CVE-2013-2232)

An information leak was discovered in the IPSec key_socket implementation in the Linux kernel. An local user could exploit this flaw to examine potentially sensitive information in kernel memory.
(CVE-2013-2234)

Hannes Frederic Sowa discovered a flaw in setsockopt UDP_CORK option in the Linux kernel's IPv6 stack. A local user could exploit this flaw to cause a denial of service (system crash). (CVE-2013-4162)

Hannes Frederic Sowa discovered a flaw in the IPv6 subsystem of the Linux kernel when the IPV6_MTU setsockopt option has been specified in combination with the UDP_CORK option. A local user could exploit this flaw to cause a denial of service (system crash). (CVE-2013-4163).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	Name	Product	Family	Severity
291039	Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-000717)	Nessus	Unity Linux Local Security Checks	medium
286965	Unity Linux 20.1060a / 20.1070a Security Update: kernel (UTSA-2026-002420)	Nessus	Unity Linux Local Security Checks	medium
286650	Unity Linux 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-001921)	Nessus	Unity Linux Local Security Checks	medium
70801	Ubuntu 12.04 LTS : linux vulnerabilities (USN-2017-1)	Nessus	Ubuntu Local Security Checks	medium
69812	Ubuntu 12.04 LTS : linux-lts-quantal vulnerabilities (USN-1947-1)	Nessus	Ubuntu Local Security Checks	medium
69811	Ubuntu 12.10 : linux vulnerabilities (USN-1944-1)	Nessus	Ubuntu Local Security Checks	medium

Detections

Analytics

CVE-2012-5375

medium

Tenable Plugins

medium

medium

medium

medium

medium

medium