All errata/sisyphus/ALT-PU-2021-1093-2
ALT-PU-2021-1093-2

Package update kernel-image-rpi-def in branch sisyphus

Version5.4.83-alt1
Task#264900
Published2026-02-04
Max severityHIGH
Severity:

Closed issues (19)

BDU:2020-04797
HIGH8.8

Уязвимость компонента net/bluetooth/l2cap_core.c ядра операционных систем Linux, позволяющая нарушителю выполнить произвольный код или вызвать отказ в обслуживании

Published: 2020-10-22Modified: 2025-02-27
CVSS 3.xHIGH 8.8
CVSS:3.x/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0MEDIUM 5.8
CVSS:2.0/AV:A/AC:L/Au:N/C:P/I:P/A:P
References
BDU:2020-05279
MEDIUM5.5

Уязвимость ядра операционных систем Linux, позволяющая нарушителю вызвать отказ в обслуживании

Published: 2020-11-19Modified: 2024-06-18
CVSS 3.xMEDIUM 5.5
CVSS:3.x/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0MEDIUM 4.9
CVSS:2.0/AV:L/AC:L/Au:N/C:N/I:N/A:C
References
BDU:2020-05454
HIGH7.8

Уязвимость функции sunkbd_reinit() (drivers/input/keyboard/sunkbd.c) ядра операционной системы Linux, позволяющая нарушителю вызвать отказ в обслуживании

Published: 2020-12-01Modified: 2024-09-13
CVSS 3.xHIGH 7.8
CVSS:3.x/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0MEDIUM 6.8
CVSS:2.0/AV:L/AC:L/Au:S/C:C/I:C/A:C
References
BDU:2021-00005
HIGH7.8

Уязвимость компонента drivers/tty/tty_jobctrl.c ядра операционной системы Linux, позволяющая нарушителю оказать воздействие на конфиденциальность, целостность и доступность защищаемой информации

Published: 2021-01-13Modified: 2024-05-30
CVSS 3.xHIGH 7.8
CVSS:3.x/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0MEDIUM 6.8
CVSS:2.0/AV:L/AC:L/Au:S/C:C/I:C/A:C
References
BDU:2021-00106
HIGH7.2

Уязвимость модуля HDLC_PPP ядра операционной системы Linux, связанная с недостаточной проверкой вводимых данных, позволяющая нарушителю вызвать отказ в обслуживании

Published: 2021-01-14Modified: 2022-10-17
CVSS 3.xHIGH 7.2
CVSS:3.x/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0HIGH 7.5
CVSS:2.0/AV:N/AC:M/Au:S/C:P/I:P/A:C
References
BDU:2021-03394
HIGH7.8

Уязвимость компонента net/packet/af_packet.c ядра операционной системы Linux, связанная с выходом операции за допустимые границы буфера данных, позволяющая нарушителю получить доступ к конфиденциальной информации или вызвать отказ в обслуживании

Published: 2021-07-06Modified: 2024-09-16
CVSS 3.xHIGH 7.8
CVSS:3.x/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0MEDIUM 6.8
CVSS:2.0/AV:L/AC:L/Au:S/C:C/I:C/A:C
References
BDU:2021-03443
MEDIUM6.7

Уязвимость компонента RTAS ядра операционной системы Linux, связанная с отсутствием механизма авторизации, позволяющая нарушителю получить доступ к конфиденциальным данным, нарушить их целостность, а также вызвать отказ в обслуживании

Published: 2021-07-07Modified: 2024-09-13
CVSS 3.xMEDIUM 6.7
CVSS:3.x/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0HIGH 7.2
CVSS:2.0/AV:L/AC:L/Au:N/C:C/I:C/A:C
References
BDU:2022-03140
HIGH7.0

Уязвимость подсистемы tty ядра операционной системы Linux, позволяющая нарушителю получить доступ к конфиденциальной информации или вызвать отказ в обслуживании

Published: 2022-05-26Modified: 2024-09-13
CVSS 3.xHIGH 7.0
CVSS:3.x/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0MEDIUM 6.6
CVSS:2.0/AV:L/AC:M/Au:S/C:C/I:C/A:C
References
CVE-2020-12351
HIGH8.8

Improper input validation in BlueZ may allow an unauthenticated user to potentially enable escalation of privilege via adjacent access.

Published: 2020-11-23Modified: 2024-11-21
CVSS 2.0MEDIUM 5.8
CVSS:2.0/AV:A/AC:L/Au:N/C:P/I:P/A:P
CVSS 3.xHIGH 8.8
CVSS:3.x/CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
References
CVE-2020-14386
HIGH7.8

A flaw was found in the Linux kernel before 5.9-rc4. Memory corruption can be exploited to gain root privileges from unprivileged processes. The highest threat from this vulnerability is to data confidentiality and integrity.

Published: 2020-09-16Modified: 2024-11-21
CVSS 2.0HIGH 7.2
CVSS:2.0/AV:L/AC:L/Au:N/C:C/I:C/A:C
CVSS 3.xHIGH 7.8
CVSS:3.x/CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
References
CVE-2020-25643
HIGH7.2

A flaw was found in the HDLC_PPP module of the Linux kernel in versions before 5.9-rc7. Memory corruption and a read overflow is caused by improper input validation in the ppp_cp_parse_cr function which can cause the system to crash or cause a denial of service. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

Published: 2020-10-06Modified: 2024-11-21
CVSS 2.0HIGH 7.5
CVSS:2.0/AV:N/AC:M/Au:S/C:P/I:P/A:C
CVSS 3.xHIGH 7.2
CVSS:3.x/CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
References
CVE-2020-25668
HIGH7.0

A flaw was found in Linux Kernel because access to the global variable fg_console is not properly synchronized leading to a use after free in con_font_op.

Published: 2021-05-26Modified: 2024-11-21
CVSS 2.0MEDIUM 6.9
CVSS:2.0/AV:L/AC:M/Au:N/C:C/I:C/A:C
CVSS 3.xHIGH 7.0
CVSS:3.x/CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
References
CVE-2020-25669
HIGH7.8

A vulnerability was found in the Linux Kernel where the function sunkbd_reinit having been scheduled by sunkbd_interrupt before sunkbd being freed. Though the dangling pointer is set to NULL in sunkbd_disconnect, there is still an alias in sunkbd_reinit causing Use After Free.

Published: 2021-05-26Modified: 2024-11-21
CVSS 2.0HIGH 7.2
CVSS:2.0/AV:L/AC:L/Au:N/C:C/I:C/A:C
CVSS 3.xHIGH 7.8
CVSS:3.x/CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
References
CVE-2020-27673
MEDIUM5.5

An issue was discovered in the Linux kernel through 5.9.1, as used with Xen through 4.14.x. Guest OS users can cause a denial of service (host OS hang) via a high rate of events to dom0, aka CID-e99502f76271.

Published: 2020-10-22Modified: 2024-11-21
CVSS 2.0MEDIUM 4.9
CVSS:2.0/AV:L/AC:L/Au:N/C:N/I:N/A:C
CVSS 3.xMEDIUM 5.5
CVSS:3.x/CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
References
CVE-2020-27777
MEDIUM6.7

A flaw was found in the way RTAS handled memory accesses in userspace to kernel communication. On a locked down (usually due to Secure Boot) guest system running on top of PowerVM or KVM hypervisors (pseries platform) a root like local user could use this flaw to further increase their privileges to that of a running kernel.

Published: 2020-12-15Modified: 2024-11-21
CVSS 2.0HIGH 7.2
CVSS:2.0/AV:L/AC:L/Au:N/C:C/I:C/A:C
CVSS 3.xMEDIUM 6.7
CVSS:3.x/CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
References
CVE-2020-27784
MEDIUM5.5

A vulnerability was found in the Linux kernel, where accessing a deallocated instance in printer_ioctl() printer_ioctl() tries to access of a printer_dev instance. However, use-after-free arises because it had been freed by gprinter_free().

Published: 2022-09-01Modified: 2024-11-21
CVSS 3.xMEDIUM 5.5
CVSS:3.x/CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
References
CVE-2020-29661
HIGH7.8

A locking issue was discovered in the tty subsystem of the Linux kernel through 5.9.13. drivers/tty/tty_jobctrl.c allows a use-after-free attack against TIOCSPGRP, aka CID-54ffccbf053b.

Published: 2020-12-09Modified: 2024-11-21
CVSS 2.0HIGH 7.2
CVSS:2.0/AV:L/AC:L/Au:N/C:C/I:C/A:C
CVSS 3.xHIGH 7.8
CVSS:3.x/CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
References
CVE-2020-35519
HIGH7.8

An out-of-bounds (OOB) memory access flaw was found in x25_bind in net/x25/af_x25.c in the Linux kernel version v5.12-rc5. A bounds check failure allows a local attacker with a user account on the system to gain access to out-of-bounds memory, leading to a system crash or a leak of internal kernel information. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

Published: 2021-05-06Modified: 2024-11-21
CVSS 2.0MEDIUM 6.8
CVSS:2.0/AV:L/AC:L/Au:N/C:C/I:P/A:C
CVSS 3.xHIGH 7.8
CVSS:3.x/CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
References
CVE-2020-36789
MEDIUM5.5

In the Linux kernel, the following vulnerability has been resolved: can: dev: can_get_echo_skb(): prevent call to kfree_skb() in hard IRQ context If a driver calls can_get_echo_skb() during a hardware IRQ (which is often, but not always, the case), the 'WARN_ON(in_irq)' in net/core/skbuff.c#skb_release_head_state() might be triggered, under network congestion circumstances, together with the potential risk of a NULL pointer dereference. The root cause of this issue is the call to kfree_skb() instead of dev_kfree_skb_irq() in net/core/dev.c#enqueue_to_backlog(). This patch prevents the skb to be freed within the call to netif_rx() by incrementing its reference count with skb_get(). The skb is finally freed by one of the in-irq-context safe functions: dev_consume_skb_any() or dev_kfree_skb_any(). The "any" version is used because some drivers might call can_get_echo_skb() in a normal context. The reason for this issue to occur is that initially, in the core network stack, loopback skb were not supposed to be received in hardware IRQ context. The CAN stack is an exeption. This bug was previously reported back in 2017 in [1] but the proposed patch never got accepted. While [1] directly modifies net/core/dev.c, we try to propose here a smoother modification local to CAN network stack (the assumption behind is that only CAN devices are affected by this issue). [1] http://lore.kernel.org/r/57a3ffb6-3309-3ad5-5a34-e93c3fe3614d@cetitec.com

Published: 2025-04-17Modified: 2025-10-01
CVSS 3.xMEDIUM 5.5
CVSS:3.x/CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
References