Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | <= 5.13.7 |
| Debian | Debian Linux | 9.0 |
| Fedoraproject | Fedora | 33 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/patch/?id=203PatchVendor Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/patch/?id=f5ePatchVendor Advisory
- https://lists.debian.org/debian-lts-announce/2021/10/msg00010.htmlMailing ListThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://www.openwall.com/lists/oss-security/2021/08/01/3Mailing ListThird Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/patch/?id=203PatchVendor Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/patch/?id=f5ePatchVendor Advisory
- https://lists.debian.org/debian-lts-announce/2021/10/msg00010.htmlMailing ListThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://www.openwall.com/lists/oss-security/2021/08/01/3Mailing ListThird Party Advisory
FAQ
What is CVE-2021-35477?
CVE-2021-35477 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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 stor...
How severe is CVE-2021-35477?
CVE-2021-35477 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-35477?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel, Debian Debian Linux, Fedoraproject Fedora.