CVE-2020-15852

unknown

Published — · Modified —

CVSS v3

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CVSS v2

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VIR risk

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Description

An issue was discovered in the Linux kernel 5.5 through 5.7.9, as used in Xen through 4.13.x for x86 PV guests. An attacker may be granted the I/O port permissions of an unrelated task. This occurs because tss_invalidate_io_bitmap mishandling causes a loss of synchronization between the I/O bitmaps of TSS and Xen, aka CID-cadfad870154.

Predictions

Exploit likelihood

20%

Patch ETA

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Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2020-15852

vendor Authored 2026-05-27

Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2020-15852.html

OS impact

OS	Version	Status	Fixed in
sles		affected
debian	bookworm	fixed	`5.7.10-1`
debian	bullseye	fixed	`5.7.10-1`
debian	forky	fixed	`5.7.10-1`
debian	sid	fixed	`5.7.10-1`
debian	trixie	fixed	`5.7.10-1`

References

https://www.suse.com/security/cve/CVE-2020-15852.html
https://security-tracker.debian.org/tracker/CVE-2020-15852

Verify integrity in audit chain (admin only). AS-IS.