Canonical vulnerabilities
We track 133 vulnerabilities in Canonical products across 32 products. 127 are rated high or critical, and 46 have been exploited in real attacks. The most recent was published on November 9, 2026.
Latest Canonical vulnerabilities
- 9.8 Critical severity
GNU Bourne-Again Shell (Bash) Arbitrary Code Execution Exploited
GNU Bash through 4.3 processes trailing strings after function definitions in the values of environment variables, which allows remote attackers to execute arbitrary code via a crafted environment, as demonstrated by vectors involving the ForceCommand feature
- 7.8 High severity
Linux Kernel Privilege Escalation Exploited
The futex_requeue function in kernel/futex.c in the Linux kernel through 3.14.5 does not ensure that calls have two different futex addresses, which allows local users to gain privileges via a crafted FUTEX_REQUEUE command that facilitates unsafe waiter modifi
- 6.9 Medium severity
Linux Kernel Race Condition Exploited
The n_tty_write function in drivers/tty/n_tty.c in the Linux kernel through 3.14.3 does not properly manage tty driver access in the "LECHO & !OPOST" case, which allows local users to cause a denial of service (memory corruption and system crash) or gain privi
- 7.5 High severity
OpenSSL Information Disclosure Exploited
The (1) TLS and (2) DTLS implementations in OpenSSL 1.0.1 before 1.0.1g do not properly handle Heartbeat Extension packets, which allows remote attackers to obtain sensitive information from process memory via crafted packets that trigger a buffer over-read, a
- 8.8 High severity
Mozilla Firefox and Thunderbird Denial-of-Service Exploited
Mozilla Firefox before 22.0, Firefox ESR 17.x before 17.0.7, Thunderbird before 17.0.7, and Thunderbird ESR 17.x before 17.0.7 do not properly handle onreadystatechange events in conjunction with page reloading, which allows remote attackers to cause a denial
- 6.5 Medium severity
Mozilla Firefox Information Disclosure Exploited
Mozilla Firefox before 21.0, Firefox ESR 17.x before 17.0.6, Thunderbird before 17.0.6, and Thunderbird ESR 17.x before 17.0.6 do not properly initialize data structures for the nsDOMSVGZoomEvent::mPreviousScale and nsDOMSVGZoomEvent::mNewScale functions, whic
- 4.3 Medium severity
Oracle JRE Unspecified Exploited
Unspecified vulnerability in the Java Runtime Environment (JRE) component in Oracle Java SE 7 Update 17 and earlier, and OpenJDK 7, allows remote attackers to affect integrity via unknown vectors related to HotSpot. NOTE: the previous information is from the A
- 10.0 High severity
Oracle JRE Remote Code Execution Exploited
Multiple vulnerabilities in Oracle Java 7 before Update 11 allow remote attackers to execute arbitrary code by (1) using the public getMBeanInstantiator method in the JmxMBeanServer class to obtain a reference to a private MBeanInstantiator object, then retrie
- 9.8 Critical severity
Oracle Java SE Runtime Environment (JRE) Arbitrary Code Execution Exploited
Unspecified vulnerability in the Java Runtime Environment component in Oracle Java SE JDK and JRE 7 and 6 Update 27 and earlier allows remote untrusted Java Web Start applications and untrusted Java applets to affect confidentiality, integrity, and availabilit
- 7.8 High severity
Exim Privilege Escalation Exploited
Exim 4.72 and earlier allows local users to gain privileges by leveraging the ability of the exim user account to specify an alternate configuration file with a directive that contains arbitrary commands, as demonstrated by the spool_directory directive.
- 9.8 Critical severity
Exim Heap-Based Buffer Overflow Exploited
Heap-based buffer overflow in the string_vformat function in string.c in Exim before 4.70 allows remote attackers to execute arbitrary code via an SMTP session that includes two MAIL commands in conjunction with a large message containing crafted headers, lead
- 7.8 High severity
Linux Kernel Improper Input Validation Exploited
The rds_page_copy_user function in net/rds/page.c in the Reliable Datagram Sockets (RDS) protocol implementation in the Linux kernel before 2.6.36 does not properly validate addresses obtained from user space, which allows local users to gain privileges via cr
- 9.8 Critical severity
Oracle JRE Unspecified Exploited
Unspecified vulnerability in the Java Runtime Environment component in Oracle Java SE and Java for Business 6 Update 18, 5.0 Update 23, and 1.4.2_25 allows remote attackers to affect confidentiality, integrity, and availability via unknown vectors. NOTE: the p