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.
Platform | Package | Release Date | Advisory |
---|---|---|---|
Amazon Linux 1 | kernel | 2021-01-12 22:51 | ALAS-2021-1461 |
Amazon Linux 2 - Core | kernel | 2020-12-08 20:55 | ALAS2-2020-1566 |
Amazon Linux 2 - Kernel-5.4 Extra | kernel | 2022-01-20 19:50 | ALAS2KERNEL-5.4-2022-018 |
Score Type | Score | Vector | |
---|---|---|---|
Amazon Linux | CVSSv3 | 4.7 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H |
Amazon Linux | CVSSv2 | 4.7 | AV:L/AC:M/Au:N/C:N/I:N/A:C |
NVD | CVSSv2 | 4.7 | AV:L/AC:M/Au:N/C:N/I:N/A:C |
NVD | CVSSv3 | 4.7 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H |