CVE-2020-27675
low
CVSS v3
—
CVSS v2
—
VIR risk
2.5
Description
An issue was discovered in the Linux kernel through 5.9.1, as used with Xen through 4.14.x. drivers/xen/events/events_base.c allows event-channel removal during the event-handling loop (a race condition). This can cause a use-after-free or NULL pointer dereference, as demonstrated by a dom0 crash via events for an in-reconfiguration paravirtualized device, aka CID-073d0552ead5.
Predictions
Exploit likelihood
20%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2020-27675
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2020-27675.html
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| arch | fixed | 5.9.2.arch1-1 | |
| sles | affected | | |
| debian | bookworm | fixed | 5.9.6-1 |
| debian | bullseye | fixed | 5.9.6-1 |
| debian | forky | fixed | 5.9.6-1 |
| debian | sid | fixed | 5.9.6-1 |
| debian | trixie | fixed | 5.9.6-1 |
References
Verify integrity in audit chain (admin only). AS-IS.