Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service, or information leak.
CVE-2022-2196
A regression was discovered in the KVM implementation for Intel CPUs,
affecting Spectre v2 mitigation for nested virtualisation. When
KVM was used as the L0 hypervisor, an L2 guest could exploit this
to leak sensitive information from its L1 hypervisor.
CVE-2022-3424
Zheng Wang and Zhuorao Yang reported a flaw in the SGI GRU driver
which could lead to a use-after-free. On systems where this driver
is used, a local user can explit this for denial of service (crash
or memory corruption) or possibly for privilege escalation.
This driver is not enabled in Debian's official kernel
configurations.
CVE-2022-3707
Zheng Wang reported a flaw in the i915 graphics driver's
virtualisation (GVT-g) support that could lead to a double-free.
On systems where this feature is used, a guest can exploit this
for denial of service (crash or memory corruption) or possibly for
privilege escalation.
CVE-2022-4129
Haowei Yan reported a race condition in the L2TP protocol
implementation which could lead to a null pointer dereference. A
local user could exploit this for denial of service (crash).
CVE-2022-4379
Xingyuan Mo reported a flaw in the NFSv4.2 inter server to
server copy implementation which could lead to a use-after-free.
This feature is not enabled in Debian's official kernel
configurations.
CVE-2023-0045
Rodrigo Branco and Rafael Correa De Ysasi reported that when a
user-space task told the kernel to enable Spectre v2 mitigation
for it, the mitigation was not enabled until the task was next
rescheduled. This might be exploitable by a local or remote
attacker to leak sensitive information from such an application.
CVE-2023-0458
Jordy Zimmer and Alexandra Sandulescu found that getrlimit() and
related system calls were vulnerable to speculative execution
attacks such as Spectre v1. A local user could explot this to
leak sensitive information from the kernel.
CVE-2023-0459
Jordy Zimmer and Alexandra Sandulescu found a regression in
Spectre v1 mitigation in the user-copy functions for the amd64
(64-bit PC) architecture. Where the CPUs do not implement SMAP or
it is disabled, a local user could exploit this to leak sensitive
information from the kernel. Other architectures may also be
affected.
CVE-2023-0461
"slipper" reported a flaw in the kernel's support for ULPs (Upper
Layer Protocols) on top of TCP that can lead to a double-free when
using kernel TLS sockets. A local user can exploit this for
denial of service (crash or memory corruption) or possibly for
privilege escalation.
Kernel TLS is not enabled in Debian's official kernel
configurations.
CVE-2023-1073
Pietro Borrello reported a type confusion flaw in the HID (Human
Interface Device) subsystem. An attacker able to insert and
remove USB devices might be able to use this to cause a denial of
service (crash or memory corruption) or possibly to run arbitrary
code in the kernel.
CVE-2023-1074
Pietro Borrello reported a type confusion flaw in the SCTP
protocol implementation which can lead to a memory leak. A local
user could exploit this to cause a denial of service (resource
exhaustion).
CVE-2023-1076
Pietro Borrello reported a type confusion flaw in the TUN/TAP
network driver, which results in all TUN/TAP sockets being marked
as belonging to user ID 0 (root). This may allow local users to
evade local firewall rules based on user ID.
CVE-2023-1077
Pietro Borrello reported a type confusion flaw in the task
scheduler. A local user might be able to exploit this to cause a
denial of service (crash or memory corruption) or possibly for
privilege escalation.
CVE-2023-1078
Pietro Borrello reported a type confusion flaw in the RDS protocol
implementation. A local user could exploit this to cause a denial
of service (crash or memory corruption) or possibly for privilege
escalation.
CVE-2023-1079
Pietro Borrello reported a race condition in the hid-asus HID
driver which could lead to a use-after-free. An attacker able to
insert and remove USB devices can use this to cause a denial of
service (crash or memory corruption) or possibly to run arbitrary
code in the kernel.
CVE-2023-1118
Duoming Zhou reported a race condition in the ene_ir remote
control driver that can lead to a use-after-free if the driver
is unbound. It is not clear what the security impact of this is.
CVE-2023-1281, CVE-2023-1829
"valis" reported two flaws in the cls_tcindex network traffic
classifier which could lead to a use-after-free. A local user can
exploit these for privilege escalation. This update removes
cls_tcindex entirely.
CVE-2023-1513
Xingyuan Mo reported an information leak in the KVM implementation
for the i386 (32-bit PC) architecture. A local user could exploit
this to leak sensitive information from the kernel.
CVE-2023-1611
"butt3rflyh4ck" reported a race condition in the btrfs filesystem
driver which can lead to a use-after-free. A local user could
exploit this to cause a denial of service (crash or memory
corruption) or possibly for privilege escalation.
CVE-2023-1670
Zheng Wang reported a race condition in the xirc2ps_cs network
driver which can lead to a use-after-free. An attacker able to
insert and remove PCMCIA devices can use this to cause a denial of
service (crash or memory corruption) or possibly to run arbitrary
code in the kernel.
CVE-2023-1855
Zheng Wang reported a race condition in the xgene-hwmon hardware
monitoring driver that may lead to a use-after-free. It is not
clear what the security impact of this is.
CVE-2023-1859
Zheng Wang reported a race condition in the 9pnet_xen transport
for the 9P filesystem on Xen, which can lead to a use-after-free.
On systems where this feature is used, a backend driver in another
domain can use this to cause a denial of service (crash or memory
corruption) or possibly to run arbitrary code in the vulnerable
domain.
CVE-2023-1872
Bing-Jhong Billy Jheng reported a race condition in the io_uring
subsystem that can lead to a use-after-free. A local user could
exploit this to cause a denial of service (crash or memory
corruption) or possibly for privilege escalation.
CVE-2023-1989
Zheng Wang reported a race condition in the btsdio Bluetooth
adapter driver that can lead to a use-after-free. An attacker
able to insert and remove SDIO devices can use this to cause a
denial of service (crash or memory corruption) or possibly to run
arbitrary code in the kernel.
CVE-2023-1990
Zheng Wang reported a race condition in the st-nci NFC adapter
driver that can lead to a use-after-free. It is not clear what
the security impact of this is.
This driver is not enabled in Debian's official kernel
configurations.
CVE-2023-1998
José Oliveira and Rodrigo Branco reported a regression in Spectre
v2 mitigation for user-space on x86 CPUs supporting IBRS but not
eIBRS. This might be exploitable by a local or remote attacker to
leak sensitive information from a user-space application.
CVE-2023-2162
Mike Christie reported a race condition in the iSCSI TCP transport
that can lead to a use-after-free. On systems where this feature
is used, a local user might be able to use this to cause a denial
of service (crash or memory corruption) or possibly for privilege
escalation.
CVE-2023-2194
Wei Chen reported a potential heap buffer overflow in the
i2c-xgene-slimpro I²C adapter driver. A local user with
permission to access such a device can use this to cause a denial
of service (crash or memory corruption) and probably for privilege
escalation.
CVE-2023-22998
Miaoqian Lin reported an incorrect error check in the virtio-gpu
GPU driver. A local user with access to such a device might be
able to use this to cause a denial of service (crash).
CVE-2023-23004
Miaoqian Lin reported an incorrect error check in the mali-dp GPU
driver. A local user with access to such a device might be able
to use this to cause a denial of service (crash).
CVE-2023-23559
Szymon Heidrich reported incorrect bounds checks in the rndis_wlan
Wi-Fi driver which may lead to a heap buffer overflow or overread.
An attacker able to insert and remove USB devices can use this to
cause a denial of service (crash or memory corruption) or
information leak, or possibly to run arbitrary code in the kernel.
CVE-2023-25012
Pietro Borrello reported a race condition in the hid-bigbenff HID
driver which could lead to a use-after-free. An attacker able to
insert and remove USB devices can use this to cause a denial of
service (crash or memory corruption) or possibly to run arbitrary
code in the kernel.
CVE-2023-26545
Lianhui Tang reported a flaw in the MPLS protocol implementation
that could lead to a double-free. A local user might be able to
exploit this to cause a denial of service (crash or memory
corruption) or possibl for privilege escalation.
CVE-2023-28328
Wei Chen reported a flaw in the az6927 DVB driver that can lead to
a null pointer dereference. A local user permitted to access an
I²C adapter device that this driver creates can use this to cause
a denial of service (crash).
CVE-2023-28466
Hangyu Hua reported a race condition in the kernel TLS socket
implementation which can lead to a use-after-free or null
pointer dereference. A local user can exploit this for
denial of service (crash or memory corruption) or possibly for
privilege escalation.
This feature is not enabled in Debian's official kernel
configurations.
CVE-2023-30456
Reima ISHII reported a flaw in the KVM implementation for Intel
CPUs affecting nested virtualisation. When KVM was used as the L0
hypervisor, and EPT and/or unrestricted guest mode was disabled,
it did not prevent an L2 guest from being configured with an
architecturally invalid protection/paging mode. A malicious guest
could exploit this to cause a denial of service (crash).
This update additionally fixes Debian bugs #989705, #993612, #1022126, and #1031753; and includes many more bug fixes from stable updates 5.10.163-5.10.178 inclusive.
For Debian 9 stretch, these problems have been fixed in version 5.10.178-3~deb9u1.
We recommend that you upgrade your linux-5.10 packages.
Further information about Extended LTS security advisories can be found in the dedicated section of our website.