CVE-2020-29569
- State
- Published
- Severity
- Not scored
- Published
- Dec 15, 2020
- Updated
- Aug 4, 2024
- Reserved
- Dec 4, 2020
Description
An issue was discovered in the Linux kernel through 5.10.1, as used with Xen through 4.14.x. The Linux kernel PV block backend expects the kernel thread handler to reset ring->xenblkd to NULL when stopped. However, the handler may not have time to run if the frontend quickly toggles between the states connect and disconnect. As a consequence, the block backend may re-use a pointer after it was freed. A misbehaving guest can trigger a dom0 crash by continuously connecting / disconnecting a block frontend. Privilege escalation and information leaks cannot be ruled out. This only affects systems with a Linux blkback.
Scores
The record has no CVSS score.
Weaknesses
The record names no weakness.
Affected Products
| Product | Versions |
|---|---|
n/an/a |
|
References
- https://xenbits.xenproject.org/xsa/advisory-350.html
- DSA-4843vendor-advisory
- https://security.netapp.com/advisory/ntap-20210205-0001/
- [debian-lts-announce] 20210212 [SECURITY] [DLA 2557-1] linux-4.19 security updatemailing-list
- [debian-lts-announce] 20210309 [SECURITY] [DLA 2586-1] linux security updatemailing-list
- GLSA-202107-30vendor-advisory
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