CVE-2020-11565
Last modified
CVE-2020-11565 is a medium-severity vulnerability rated 6/10 on the CVSS scale. An issue was discovered in the Linux kernel through 5.6.2. mpol_parse_str in mm/mempolicy.c has a stack-based out-of-bounds write because an empty nodelist is mishandled during mount option parsing, aka CID-aa9f7d5172fa. EPSS estimates a 0.52% chance of exploitation in the next 30 days.
Description
An issue was discovered in the Linux kernel through 5.6.2. mpol_parse_str in mm/mempolicy.c has a stack-based out-of-bounds write because an empty nodelist is mishandled during mount option parsing, aka CID-aa9f7d5172fa. NOTE: Someone in the security community disagrees that this is a vulnerability because the issue “is a bug in parsing mount options which can only be specified by a privileged user, so triggering the bug does not grant any powers not already held.”
Metrics
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | <= 5.6.2 |
| Canonical | Ubuntu Linux | 14.04 |
| Canonical | Ubuntu Linux | 16.04 |
| Canonical | Ubuntu Linux | 18.04 |
| Canonical | Ubuntu Linux | 20.04 |
References
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=aa9f7d5172fac9bf1f09e678c35e287a40a7b7ddMailing List, Patch, Vendor Advisory
- https://github.com/torvalds/linux/commit/aa9f7d5172fac9bf1f09e678c35e287a40a7b7ddPatch, Third Party Advisory
- https://usn.ubuntu.com/4364-1/Third Party Advisory
- https://usn.ubuntu.com/4367-1/Third Party Advisory
- https://usn.ubuntu.com/4368-1/Third Party Advisory
- https://www.debian.org/security/2020/dsa-4667Third Party Advisory
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=aa9f7d5172fac9bf1f09e678c35e287a40a7b7ddMailing List, Patch, Vendor Advisory
- https://github.com/torvalds/linux/commit/aa9f7d5172fac9bf1f09e678c35e287a40a7b7ddPatch, Third Party Advisory
- https://usn.ubuntu.com/4364-1/Third Party Advisory
- https://usn.ubuntu.com/4367-1/Third Party Advisory
- https://usn.ubuntu.com/4368-1/Third Party Advisory
- https://www.debian.org/security/2020/dsa-4667Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
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