Summary
It was discovered that the btrfs implementation in the Linux kernel did not
properly detect that a block was marked dirty in some situations. An
attacker could use this to specially craft a file system image that, when
unmounted, could cause a denial of service (system crash). (CVE-2019-19377)
It was discovered that the linux kernel did not properly validate certain
mount options to the tmpfs virtual memory file system. A local attacker
with the ability to specify mount options could use this to cause a denial
of service (system crash). (CVE-2020-11565)
It was discovered that the block layer in the Linux kernel contained a race
condition leading to a use-after-free vulnerability. A local attacker could
possibly use this to cause a denial of service (system crash) or execute
arbitrary code. (CVE-2020-12657)
Fixed packages 8
| Release | Package | Fixed in |
|---|---|---|
| Ubuntu · 20.04 LTS 20.04:LTS | linux | 5.4.0-31.35 |
| Ubuntu · 20.04 LTS 20.04:LTS | linux-aws | 5.4.0-1011.11 |
| Ubuntu · 20.04 LTS 20.04:LTS | linux-azure | 5.4.0-1012.12 |
| Ubuntu · 20.04 LTS 20.04:LTS | linux-gcp | 5.4.0-1011.11 |
| Ubuntu · 20.04 LTS 20.04:LTS | linux-kvm | 5.4.0-1011.11 |
| Ubuntu · 20.04 LTS 20.04:LTS | linux-oracle | 5.4.0-1011.11 |
| Ubuntu · 20.04 LTS 20.04:LTS | linux-raspi | 5.4.0-1011.11 |
| Ubuntu · 20.04 LTS 20.04:LTS | linux-riscv | 5.4.0-26.30 |
Vulnerabilities 4
-
Unscored —
In the Linux kernel 5.0.21, mounting a crafted btrfs filesystem image, performing some operations, and unmounting can l…
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Unscored —
An issue was discovered in the Linux kernel through 5.6.2. mpol_parse_str in mm/mempolicy.c has a stack-based out-of-bo…
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Unscored —
An issue was discovered in the Linux kernel before 5.6.5. There is a use-after-free in block/bfq-iosched.c related to b…
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Unscored —
A signal access-control issue was discovered in the Linux kernel before 5.6.5, aka CID-7395ea4e65c2. Because exec_id in…