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Уязвимость ядра операционной системы Linux, позволяющая нарушителю повысить свои привилегии или получить несанкционированный доступ к защищаемой информации

ALT-PU-2021-1009: package `kernel-image-std-def` update to version 5.4.87-alt1

ALT-PU-2021-1141: package `kernel-image-rt` update to version 4.19.165-alt1.rt70

ALT-PU-2021-1099: package `kernel-image-rpi-un` update to version 5.10.7-alt1

ALT-PU-2021-1034: package `kernel-image-un-def` update to version 5.10.7-alt1

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.

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.

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.

An issue was discovered in the Linux kernel through 5.10.1, as used wi ...

ALT-PU-2020-3571: package `kernel-image-mp` update to version 5.10.4-alt1

ALT-PU-2021-5018: package `kernel-image-xenomai` update to version 4.19.177-alt1.cip44.17

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.

Security update for the Linux Kernel (Live Patch 21 for SLE 15 SP1)

Security update for the Linux Kernel (Live Patch 9 for SLE 15 SP2)

ELSA-2021-9025: Unbreakable Enterprise kernel-container security update (IMPORTANT)

ELSA-2021-9024: Unbreakable Enterprise kernel-container security update (IMPORTANT)

ELSA-2021-9023: Unbreakable Enterprise kernel security update (IMPORTANT)

ELSA-2021-9008: Unbreakable Enterprise kernel-container security update (IMPORTANT)

ELSA-2021-9005: Unbreakable Enterprise kernel security update (IMPORTANT)

ELSA-2021-9009: Unbreakable Enterprise kernel security update (IMPORTANT)