Vulnerability in Linux Kernel
CVE-2021-26708
A local privilege escalation was discovered in the Linux kernel before 5.10.13. Multiple race conditions in the AF_VSOCK implementation are caused by wrong locking in net/vmw_vsock/af_vsock.c. The race conditions were implicitly introduced in the commits that added VSOCK multi-transport support.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.0 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.016 (75.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 76th percentile — 75.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.016 · newest: 0.016 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/ (Patch, Vendor Advisory)
- cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.13 (Release Notes, Vendor Advisory)
- www.openwall.com/lists/oss-security/2021/02/04/5 (Patch, Mailing List, Third Party Advisory)
- www.openwall.com/lists/oss-security/2021/02/05/6 (mailing-list, Patch, Mailing List, Third Party Advisory)
- security.netapp.com/advisory/ntap-20210312-0008/ (Patch, Third Party Advisory)
- www.openwall.com/lists/oss-security/2021/04/09/2 (mailing-list, Mailing List)
- www.openwall.com/lists/oss-security/2022/01/25/14 (mailing-list, Mailing List)
Frequently asked questions
- What is CVE-2021-26708?
- CVE-2021-26708 is a high-severity vulnerability in Linux Kernel, classified under Improper Locking. CVSS score: 7.0/10. Published 2021-02-05.
- How severe is CVE-2021-26708?
- High severity. CVSS v3 base score is 7.0 out of 10.
- Is CVE-2021-26708 known to be exploited?
- 46 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.