CVE-2019-7308: Medium severity Linux Linux kernel vulnerability
kernel/bpf/verifier.c in the Linux kernel before 4.20.6 performs undesirable out-of-bounds speculation on pointer arithmetic in various cases, including cases of different branches with different state or limits to sanitize, leading to side-channel attacks.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
debian/linuxto a version that resolves this vulnerability.Fixed in 5.10.223-1Fixed in 5.10.262-1Fixed in 6.1.176-1Fixed in 6.1.180-1Fixed in 6.12.94-1Fixed in 6.12.101-1Fixed in 7.1.8-1Fixed in 7.1.8-2 - Upgrade
Upgrade
Linux kernel (kernel/bpf/verifier.c)to a version that resolves this vulnerability.Fixed in 4.20.6 - Compensating control
Apply mitigations for side-channel attacks that exploit out-of-bounds speculation in Linux kernel BPF verifier pointer arithmetic, until the kernel is upgraded to a version that includes the fix.
Event History
Frequently Asked Questions
What is the severity of CVE-2019-7308?
CVE-2019-7308 is classified as a medium-severity vulnerability due to potential exposure to side-channel attacks.
How do I fix CVE-2019-7308?
To fix CVE-2019-7308, upgrade the Linux kernel to version 4.20.6 or later.
Which versions of the Linux kernel are affected by CVE-2019-7308?
CVE-2019-7308 affects Linux kernel versions prior to 4.20.6 and 4.19.19 and older.
Is CVE-2019-7308 specific to any Linux distributions?
Yes, CVE-2019-7308 affects multiple distributions, including Ubuntu 14.04, 16.04, 18.04, 18.10, and openSUSE Leap 15.0.
Can CVE-2019-7308 be exploited remotely?
CVE-2019-7308 may be exploited via local access, making it a notable concern for system security.