Vulnerability in Linux Kernel
CVE-2021-45486
In the IPv4 implementation in the Linux kernel before 5.12.4, net/ipv4/route.c has an information leak because the hash table is very small.
Vulnerability class: POODLE (CVE-2014-3566)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.5 (Low). Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.004 (28.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 28.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Linux Kernel
- Oracle Communications Cloud Native Core Binding Support Function — versions 22.1.3
- Oracle Communications Cloud Native Core Network Exposure Function — versions 22.1.1
- Oracle Communications Cloud Native Core Policy — versions 22.2.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.4 (Release Notes, Vendor Advisory)
- arxiv.org/pdf/2112.09604.pdf (Technical Description, Third Party Advisory)
- git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/net/ipv4/route.c (Patch, Vendor Advisory)
- www.oracle.com/security-alerts/cpujul2022.html (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-45486?
- CVE-2021-45486 is a low-severity vulnerability in Linux Kernel, classified under Use of a Broken or Risky Cryptographic Algorithm. CVSS score: 3.5/10. Published 2021-12-25.
- How severe is CVE-2021-45486?
- Low severity. CVSS v3 base score is 3.5 out of 10.
- Is CVE-2021-45486 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.