Vulnerability · Published Nov 23, 2020 · Assigned by openEuler
CVE-2020-15436
Medium 6.7
In plain English
A medium-severity security flaw in linux kernel. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 61% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)6.7Medium
Exploit odds (30 days)0.9%top 39.3% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack tooling1Public PoC
Official description
Use-after-free vulnerability in fs/block_dev.c in the Linux kernel before 5.8 allows local users to gain privileges or cause a denial of service by leveraging improper access to a certain error field.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | linux | 5.7.6-1 | DEBIAN-CVE-2020-15436 |
| Debian:13 | linux | 5.7.6-1 | DEBIAN-CVE-2020-15436 |
| Debian:14 | linux | 5.7.6-1 | DEBIAN-CVE-2020-15436 |
| Ubuntu:22.04:LTS | linux-intel-iot-realtime | no fix listed | UBUNTU-CVE-2020-15436 |
| Ubuntu:24.04:LTS | linux-raspi-realtime | no fix listed | UBUNTU-CVE-2020-15436 |
| Ubuntu:22.04:LTS | linux-realtime | no fix listed | UBUNTU-CVE-2020-15436 |
| Ubuntu:22.04:LTS | linux-riscv | no fix listed | UBUNTU-CVE-2020-15436 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| n/a | linux kernel | 5.7 (verified), possibly others 4.18 |
References
- https://lkml.org/lkml/2020/6/7/379 x_refsource_MISC
- https://security.netapp.com/advisory/ntap-20201218-0002/ x_refsource_CONFIRM