Summary
It was discovered that the TUN/TAP driver in the Linux kernel did not
properly initialize socket data. A local attacker could use this to cause a
denial of service (system crash). (CVE-2023-1076)
It was discovered that the Real-Time Scheduling Class implementation in the
Linux kernel contained a type confusion vulnerability in some situations. A
local attacker could use this to cause a denial of service (system crash).
(CVE-2023-1077)
It was discovered that the ASUS HID driver in the Linux kernel did not
properly handle device removal, leading to a use-after-free vulnerability.
A local attacker with physical access could plug in a specially crafted USB
device to cause a denial of service (system crash). (CVE-2023-1079)
It was discovered that the Xircom PCMCIA network device driver in the Linux
kernel did not properly handle device removal events. A physically
proximate attacker could use this to cause a denial of service (system
crash). (CVE-2023-1670)
It was discovered that a race condition existed in the Xen transport layer
implementation for the 9P file system protocol in the Linux kernel, leading
to a use-after-free vulnerability. A local attacker could use this to cause
a denial of service (guest crash) or expose sensitive information (guest
kernel memory). (CVE-2023-1859)
Jose Oliveira and Rodrigo Branco discovered that the Spectre Variant 2
mitigations with prctl syscall were insufficient in some situations. A
local attacker could possibly use this to expose sensitive information.
(CVE-2023-1998)
It was discovered that the BigBen Interactive Kids' gamepad driver in the
Linux kernel did not properly handle device removal, leading to a use-
after-free vulnerability. A local attacker with physical access could plug
in a specially crafted USB device to cause a denial of service (system
crash). (CVE-2023-25012)
It was discovered that a use-after-free vulnerability existed in the HFS+
file system implementation in the Linux kernel. A local attacker could
possibly use this to cause a denial of service (system crash).
(CVE-2023-2985)
Fixed packages 10
| Release | Package | Fixed in |
|---|---|---|
| Ubuntu · 20.04 LTS 20.04:LTS | linux-aws | 5.4.0-1104.112 |
| Ubuntu · 20.04 LTS 20.04:LTS | linux-azure | 5.4.0-1110.116 |
| Ubuntu · 20.04 LTS 20.04:LTS | linux-bluefield | 5.4.0-1065.71 |
| Ubuntu · 20.04 LTS 20.04:LTS | linux-gcp | 5.4.0-1107.116 |
| Ubuntu · 20.04 LTS 20.04:LTS | linux-gke | 5.4.0-1102.109 |
| Ubuntu · 20.04 LTS 20.04:LTS | linux-gkeop | 5.4.0-1071.75 |
| Ubuntu · 20.04 LTS 20.04:LTS | linux-ibm | 5.4.0-1051.56 |
| Ubuntu · 20.04 LTS 20.04:LTS | linux-kvm | 5.4.0-1093.99 |
| Ubuntu · 20.04 LTS 20.04:LTS | linux-oracle | 5.4.0-1103.112 |
| Ubuntu · 20.04 LTS 20.04:LTS | linux-raspi | 5.4.0-1088.99 |
Vulnerabilities 8
-
High 7.8
A flaw use after free in the Linux kernel Xircom 16-bit PCMCIA (PC-card) Ethernet driver was found.A local user could u…
-
Medium 6.8
A flaw was found in the Linux kernel. A use-after-free may be triggered in asus_kbd_backlight_set when plugging/disconn…
-
Medium 5.6CVE-2023-1998 Public exploit
Spectre v2 SMT mitigations problem in Linux kernel
The Linux kernel allows userspace processes to enable mitigations by calling prctl with PR_SET_SPECULATION_CTRL which disables the speculation feature as well as by using seccomp. We had noticed that on VMs of at least one major cloud provider, the kernel sti…
-
Medium 5.5
A flaw was found in the Linux Kernel. The tun/tap sockets have their socket UID hardcoded to 0 due to a type confusion …
-
Medium 5.5
A use after free flaw was found in hfsplus_put_super in fs/hfsplus/super.c in the Linux Kernel. This flaw could allow a…
-
Medium 4.7
A use-after-free flaw was found in xen_9pfs_front_removet in net/9p/trans_xen.c in Xen transport for 9pfs in the Linux …
-
Medium 4.6
The Linux kernel through 6.1.9 has a Use-After-Free in bigben_remove in drivers/hid/hid-bigbenff.c via a crafted USB de…
-
Unscored —
In the Linux kernel, pick_next_rt_entity() may return a type confused entry, not detected by the BUG_ON condition, as t…
References
-
report
https://ubuntu.com/security/CVE-2023-1076
-
report
https://ubuntu.com/security/CVE-2023-1077
-
report
https://ubuntu.com/security/CVE-2023-1079
-
report
https://ubuntu.com/security/CVE-2023-1670
-
report
https://ubuntu.com/security/CVE-2023-1859
-
report
https://ubuntu.com/security/CVE-2023-1998
-
report
https://ubuntu.com/security/CVE-2023-2985
-
report
https://ubuntu.com/security/CVE-2023-25012