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CVE-2020-27675

Published: Oct 22, 2020

Modified: Aug 4, 2024

PUBLISHED

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.

Vendor	Product	Versions
n/a	n/a	affected `n/a`

References

https://xenbits.xen.org/xsa/advisory-331.html

x_refsource_MISC

https://github.com/torvalds/linux/commit/073d0552ead5bfc7a3a9c01de590e924f11b5dd2

x_refsource_MISC

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=073d0552ead5bfc7a3a9c01de590e924f11b5dd2

x_refsource_MISC

FEDORA-2020-474d747b60

vendor-advisory

x_refsource_FEDORA

FEDORA-2020-09e4d062fe

vendor-advisory

x_refsource_FEDORA

FEDORA-2020-920a258c79

vendor-advisory

x_refsource_FEDORA

vendor-advisory

x_refsource_GENTOO

[debian-lts-announce] 20201210 [SECURITY] [DLA 2483-1] linux-4.19 security update

mailing-list

x_refsource_MLIST

[debian-lts-announce] 20201218 [SECURITY] [DLA 2494-1] linux security update

mailing-list

x_refsource_MLIST

[oss-security] 20210119 Xen Security Advisory 331 v3 (CVE-2020-27675) - Race condition in Linux event handler may crash dom0

mailing-list

x_refsource_MLIST

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