RCE in Linux Kernel
CVE-2021-29154
BPF JIT compilers in the Linux kernel through 5.11.12 have incorrect computation of branch displacements, allowing them to execute arbitrary code within the kernel context. This affects arch/x86/net/bpf_jit_comp.c and arch/x86/net/bpf_jit_comp32.c.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.009 (59.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 59th percentile — 59.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.debian.org/debian-lts-announce/2021/06/msg00020.html (mailing-list, Mailing List, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2021/06/msg00019.html (mailing-list, Mailing List, Third Party Advisory)
- www.oracle.com/security-alerts/cpujul2022.html (Third Party Advisory)
- www.openwall.com/lists/oss-security/2021/04/08/1 (Patch, Mailing List, Third Party Advisory)
- news.ycombinator.com/item (Third Party Advisory, Issue Tracking)
- packetstormsecurity.com/files/162434/Kernel-Live-Patch-Security-Notice-LSN-0076… (VDB Entry, Third Party Advisory)
- security.netapp.com/advisory/ntap-20210604-0006/ (Third Party Advisory)
- git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/
- git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/
Frequently asked questions
- What is CVE-2021-29154?
- CVE-2021-29154 is a high-severity vulnerability in Linux Kernel, classified under Command Injection. CVSS score: 7.8/10. Published 2021-04-08.
- How severe is CVE-2021-29154?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2021-29154 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.