Summary
It was discovered that the network block device (nbd) implementation in the
Linux kernel did not properly check for error conditions in some
situations. An attacker could possibly use this to cause a denial of
service (system crash). (CVE-2019-16089)
It was discovered that the kernel->user space relay implementation in the
Linux kernel did not properly check return values in some situations. A
local attacker could possibly use this to cause a denial of service (system
crash). (CVE-2019-19462)
Chuhong Yuan discovered that go7007 USB audio device driver in the Linux
kernel did not properly deallocate memory in some failure conditions. A
physically proximate attacker could use this to cause a denial of service
(memory exhaustion). (CVE-2019-20810)
Jason A. Donenfeld discovered that the ACPI implementation in the Linux
kernel did not properly restrict loading SSDT code from an EFI variable. A
privileged attacker could use this to bypass Secure Boot lockdown
restrictions and execute arbitrary code in the kernel. (CVE-2019-20908)
It was discovered that the elf handling code in the Linux kernel did not
initialize memory before using it in certain situations. A local attacker
could use this to possibly expose sensitive information (kernel memory).
(CVE-2020-10732)
Fan Yang discovered that the mremap implementation in the Linux kernel did
not properly handle DAX Huge Pages. A local attacker with access to DAX
storage could use this to gain administrative privileges. (CVE-2020-10757)
It was discovered that the Linux kernel did not correctly apply Speculative
Store Bypass Disable (SSBD) mitigations in certain situations. A local
attacker could possibly use this to expose sensitive information.
(CVE-2020-10766)
It was discovered that the Linux kernel did not correctly apply Indirect
Branch Predictor Barrier (IBPB) mitigations in certain situations. A local
attacker could possibly use this to expose sensitive information.
(CVE-2020-10767)
It was discovered that the Linux kernel could incorrectly enable Indirect
Branch Speculation after it has been disabled for a process via a prctl()
call. A local attacker could possibly use this to expose sensitive
information. (CVE-2020-10768)
Mauricio Faria de Oliveira discovered that the aufs implementation in the
Linux kernel improperly managed inode reference counts in the
vfsub_dentry_open() method. A local attacker could use this vulnerability
to cause a denial of service. (CVE-2020-11935)
It was discovered that the Virtual Terminal keyboard driver in the Linux
kernel contained an integer overflow. A local attacker could possibly use
this to have an unspecified impact. (CVE-2020-13974)
Jason A. Donenfeld discovered that the ACPI implementation in the Linux
kernel did not properly restrict loading ACPI tables via configfs. A
privileged attacker could use this to bypass Secure Boot lockdown
restrictions and execute arbitrary code in the kernel. (CVE-2020-15780)
Fixed packages 7
| Release | Package | Fixed in |
|---|---|---|
| Ubuntu · 18.04 LTS 18.04:LTS | linux-aws-5.3 | 5.3.0-1032.34~18.04.2 |
| Ubuntu · 18.04 LTS 18.04:LTS | linux-azure-5.3 | 5.3.0-1034.35~18.04.1 |
| Ubuntu · 18.04 LTS 18.04:LTS | linux-gcp-5.3 | 5.3.0-1032.34~18.04.1 |
| Ubuntu · 18.04 LTS 18.04:LTS | linux-gke-5.3 | 5.3.0-1032.34~18.04.1 |
| Ubuntu · 18.04 LTS 18.04:LTS | linux-hwe | 5.3.0-64.58~18.04.1 |
| Ubuntu · 18.04 LTS 18.04:LTS | linux-oracle-5.3 | 5.3.0-1030.32~18.04.1 |
| Ubuntu · 18.04 LTS 18.04:LTS | linux-raspi2-5.3 | 5.3.0-1030.32~18.04.2 |
Vulnerabilities 12
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Medium 5.5
A logic bug flaw was found in Linux kernel before 5.8-rc1 in the implementation of SSBD. A bug in the logic handling al…
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Medium 5.5
A flaw was found in the Linux kernel before 5.8-rc1 in the implementation of the Enhanced IBPB (Indirect Branch Predict…
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Medium 5.5
A flaw was found in the Linux Kernel before 5.8-rc1 in the prctl() function, where it can be used to enable indirect br…
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Medium 4.4
aufs: improperly managed inode reference counts in the vfsub_dentry_open() method
It was discovered that aufs improperly managed inode reference counts in the vfsub_dentry_open() method. A local attacker could use this vulnerability to cause a denial of service attack.
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Low 3.3
A flaw was found in the Linux kernel's implementation of Userspace core dumps. This flaw allows an attacker with a loca…
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Unscored —
An issue was discovered in the Linux kernel through 5.2.13. nbd_genl_status in drivers/block/nbd.c does not check the n…
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Unscored —
relay_open in kernel/relay.c in the Linux kernel through 5.4.1 allows local users to cause a denial of service (such as…
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Unscored —
go7007_snd_init in drivers/media/usb/go7007/snd-go7007.c in the Linux kernel before 5.6 does not call snd_card_free for…
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Unscored —
An issue was discovered in drivers/firmware/efi/efi.c in the Linux kernel before 5.4. Incorrect access permissions for …
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Unscored —CVE-2020-10757 Public exploit
A flaw was found in the Linux Kernel in versions after 4.5-rc1 in the way mremap handled DAX Huge Pages. This flaw allo…
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Unscored —
An issue was discovered in the Linux kernel 4.4 through 5.7.1. drivers/tty/vt/keyboard.c has an integer overflow if k_a…
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Unscored —CVE-2020-15780 Public exploit
An issue was discovered in drivers/acpi/acpi_configfs.c in the Linux kernel before 5.7.7. Injection of malicious ACPI t…
References
-
report
https://ubuntu.com/security/CVE-2019-16089
-
report
https://ubuntu.com/security/CVE-2019-19462
-
report
https://ubuntu.com/security/CVE-2019-20810
-
report
https://ubuntu.com/security/CVE-2019-20908
-
report
https://ubuntu.com/security/CVE-2020-10732
-
report
https://ubuntu.com/security/CVE-2020-10757
-
report
https://ubuntu.com/security/CVE-2020-10766
-
report
https://ubuntu.com/security/CVE-2020-10767
-
report
https://ubuntu.com/security/CVE-2020-10768
-
report
https://ubuntu.com/security/CVE-2020-11935
-
report
https://ubuntu.com/security/CVE-2020-13974
-
report
https://ubuntu.com/security/CVE-2020-15780