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CVE-2021-35477
CVE information
Published
Last Modified
CVSSv2.0 Severity
CVSSv3.1 Severity
Impact Analysis
Description
In the Linux kernel through 5.13.7, an unprivileged BPF program can obtain sensitive information from kernel memory via a Speculative Store Bypass side-channel attack because a certain preempting store operation does not necessarily occur before a store operation that has an attacker-controlled value..
CVSSv2.0 Score
- Severity
- Low
- Base Score
- 2.1/10
- Exploit Score
- 3.9/10
- Access Vector
- Local
- Access Complexity
- Low
- Authentication Required
- None
- Impact Score
- 2.9/10
- Confidentiality Impact
- Partial
- Availability Impact
- None
- Integrity Impact
- None
CVSSv3.1 Score
- Severity
- Medium
- Base Score
- 5.5/10
- Exploit Score
- 1.8/10
- Access Vector
- Local
- Access Complexity
- Low
- Privileges Required
- Low
- Impact Score
- 3.6/10
- Confidentiality Impact
- High
- Availability Impact
- None
- Integrity Impact
- None
- Scope
- Unchanged
- User Interaction
- None
Products Affected
CPE | Affected | Vulnerable | Excluding | Edit |
---|---|---|---|---|
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
Yes
|
- | - | |
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* |
Yes
|
- | - | |
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* |
Yes
|
- | - | |
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* |
Yes
|
- | - |
References
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/patch/?id=f5e81d11175
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/patch/?id=2039f26f3ac
- https://www.openwall.com/lists/oss-security/2021/08/01/3
- https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org