Buffer overflow in Linux Kernel
CVE-2018-25020
The BPF subsystem in the Linux kernel before 4.17 mishandles situations with a long jump over an instruction sequence where inner instructions require substantial expansions into multiple BPF instructions, leading to an overflow. This affects kernel/bpf/core.c and net/core/filter.c.
Vulnerability class: Buffer Overflow
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: 0.005 (40.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 41st percentile — 40.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/torvalds/linux/commit/050fad7c4534c13c8eb1d9c2ba66012e014773cb (Patch, Third Party Advisory)
- security.netapp.com/advisory/ntap-20211229-0005/ (Third Party Advisory)
- packetstormsecurity.com/files/165477/Kernel-Live-Patch-Security-Notice-LSN-0083… (VDB Entry, Third Party Advisory)
Frequently asked questions
- What is CVE-2018-25020?
- CVE-2018-25020 is a high-severity vulnerability in Linux Kernel, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.8/10. Published 2021-12-08.
- How severe is CVE-2018-25020?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2018-25020 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.