CVSS2
Attack Vector
LOCAL
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:L/AC:M/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
LOW
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
AI Score
Confidence
High
EPSS
Percentile
20.4%
A signal access-control issue was discovered in the Linux kernel before 5.6.5, aka CID-7395ea4e65c2. Because exec_id in include/linux/sched.h is only 32 bits, an integer overflow can interfere with a do_notify_parent protection mechanism. A child process can send an arbitrary signal to a parent process in a different security domain. Exploitation limitations include the amount of elapsed time before an integer overflow occurs, and the lack of scenarios where signals to a parent process present a substantial operational threat.
Vendor | Product | Version | CPE |
---|---|---|---|
linux | linux_kernel | * | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
canonical | ubuntu_linux | 20.04 | cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:* |
redhat | enterprise_linux | 5.0 | cpe:2.3:o:redhat:enterprise_linux:5.0:*:*:*:*:*:*:* |
redhat | enterprise_linux | 6.0 | cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:* |
redhat | enterprise_linux | 7.0 | cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* |
redhat | enterprise_linux | 8.0 | cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* |
redhat | enterprise_mrg | 2.0 | cpe:2.3:o:redhat:enterprise_mrg:2.0:*:*:*:*:*:*:* |
bugzilla.redhat.com/show_bug.cgi?id=1822077
cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.6.5
github.com/torvalds/linux/commit/7395ea4e65c2a00d23185a3f63ad315756ba9cef
lists.debian.org/debian-lts-announce/2020/06/msg00011.html
lists.debian.org/debian-lts-announce/2020/06/msg00013.html
lists.openwall.net/linux-kernel/2020/03/24/1803
security.netapp.com/advisory/ntap-20200608-0001/
usn.ubuntu.com/4367-1/
usn.ubuntu.com/4369-1/
usn.ubuntu.com/4391-1/
www.openwall.com/lists/kernel-hardening/2020/03/25/1
CVSS2
Attack Vector
LOCAL
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:L/AC:M/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
LOW
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
AI Score
Confidence
High
EPSS
Percentile
20.4%