Summary
It was discovered that a race condition existed in the Atheros Ath9k WiFi
driver in the Linux kernel. An attacker could possibly use this to expose
sensitive information (WiFi network traffic). (CVE-2020-3702)
Alois Wohlschlager discovered that the overlay file system in the Linux
kernel did not restrict private clones in some situations. An attacker
could use this to expose sensitive information. (CVE-2021-3732)
It was discovered that the KVM hypervisor implementation in the Linux
kernel did not properly compute the access permissions for shadow pages in
some situations. A local attacker could use this to cause a denial of
service. (CVE-2021-38198)
It was discovered that the Xilinx 10/100 Ethernet Lite device driver in the
Linux kernel could report pointer addresses in some situations. An attacker
could use this information to ease the exploitation of another
vulnerability. (CVE-2021-38205)
It was discovered that the ext4 file system in the Linux kernel contained a
race condition when writing xattrs to an inode. A local attacker could use
this to cause a denial of service or possibly gain administrative
privileges. (CVE-2021-40490)
It was discovered that the 6pack network protocol driver in the Linux
kernel did not properly perform validation checks. A privileged attacker
could use this to cause a denial of service (system crash) or execute
arbitrary code. (CVE-2021-42008)
Fixed packages 15
| Release | Package | Fixed in |
|---|---|---|
| Ubuntu · 18.04 LTS 18.04:LTS | linux-aws-5.4 | 5.4.0-1058.61~18.04.3 |
| Ubuntu · 18.04 LTS 18.04:LTS | linux-azure-5.4 | 5.4.0-1062.65~18.04.1 |
| Ubuntu · 18.04 LTS 18.04:LTS | linux-gcp-5.4 | 5.4.0-1056.60~18.04.1 |
| Ubuntu · 18.04 LTS 18.04:LTS | linux-gke-5.4 | 5.4.0-1054.57~18.04.1 |
| Ubuntu · 18.04 LTS 18.04:LTS | linux-gkeop-5.4 | 5.4.0-1025.26~18.04.1 |
| Ubuntu · 18.04 LTS 18.04:LTS | linux-oracle-5.4 | 5.4.0-1056.60~18.04.1 |
| Ubuntu · 18.04 LTS 18.04:LTS | linux-raspi-5.4 | 5.4.0-1045.49~18.04.1 |
| Ubuntu · 20.04 LTS 20.04:LTS | linux-aws | 5.4.0-1058.61 |
| Ubuntu · 20.04 LTS 20.04:LTS | linux-azure | 5.4.0-1062.65 |
| Ubuntu · 20.04 LTS 20.04:LTS | linux-gcp | 5.4.0-1056.60 |
| Ubuntu · 20.04 LTS 20.04:LTS | linux-gke | 5.4.0-1054.57 |
| Ubuntu · 20.04 LTS 20.04:LTS | linux-gkeop | 5.4.0-1025.26 |
| Ubuntu · 20.04 LTS 20.04:LTS | linux-ibm | 5.4.0-1006.7 |
| Ubuntu · 20.04 LTS 20.04:LTS | linux-oracle | 5.4.0-1056.60 |
| Ubuntu · 20.04 LTS 20.04:LTS | linux-raspi | 5.4.0-1045.49 |
Vulnerabilities 6
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Unscored —
u'Specifically timed and handcrafted traffic can cause internal errors in a WLAN device that lead to improper layer 2 W…
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Unscored —
A flaw was found in the Linux kernel's OverlayFS subsystem in the way the user mounts the TmpFS filesystem with Overlay…
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Unscored —
arch/x86/kvm/mmu/paging_tmpl.h in the Linux kernel before 5.12.11 incorrectly computes the access permissions of a shad…
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Unscored —
drivers/net/ethernet/xilinx/xilinx_emaclite.c in the Linux kernel before 5.13.3 makes it easier for attackers to defeat…
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Unscored —
A race condition was discovered in ext4_write_inline_data_end in fs/ext4/inline.c in the ext4 subsystem in the Linux ke…
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Unscored —CVE-2021-42008 Public exploit
The decode_data function in drivers/net/hamradio/6pack.c in the Linux kernel before 5.13.13 has a slab out-of-bounds wr…