Summary
It was discovered that the f2fs file system in the Linux kernel did not
properly validate metadata in some situations. An attacker could use this
to construct a malicious f2fs image that, when mounted and operated on,
could cause a denial of service (system crash) or possibly execute
arbitrary code. (CVE-2019-19449)
It was discovered that the Infiniband RDMA userspace connection manager
implementation in the Linux kernel contained a race condition leading to a
use-after-free vulnerability. A local attacker could use this to cause a
denial of service (system crash) or possible execute arbitrary code.
(CVE-2020-36385)
Wolfgang Frisch discovered that the ext4 file system implementation in the
Linux kernel contained an integer overflow when handling metadata inode
extents. An attacker could use this to construct a malicious ext4 file
system image that, when mounted, could cause a denial of service (system
crash). (CVE-2021-3428)
Benedict Schlueter discovered that the BPF subsystem in the Linux kernel
did not properly protect against Speculative Store Bypass (SSB) side-
channel attacks in some situations. A local attacker could possibly use
this to expose sensitive information. (CVE-2021-34556)
Piotr Krysiuk discovered that the BPF subsystem in the Linux kernel did not
properly protect against Speculative Store Bypass (SSB) side-channel
attacks in some situations. A local attacker could possibly use this to
expose sensitive information. (CVE-2021-35477)
It was discovered that the btrfs file system in the Linux kernel did not
properly handle removing a non-existent device id. An attacker with
CAP_SYS_ADMIN could use this to cause a denial of service. (CVE-2021-3739)
It was discovered that the Qualcomm IPC Router protocol implementation in
the Linux kernel did not properly validate metadata in some situations. A
local attacker could use this to cause a denial of service (system crash)
or expose sensitive information. (CVE-2021-3743)
It was discovered that the virtual terminal (vt) device implementation in
the Linux kernel contained a race condition in its ioctl handling that led
to an out-of-bounds read vulnerability. A local attacker could possibly use
this to expose sensitive information. (CVE-2021-3753)
It was discovered that the Linux kernel did not properly account for the
memory usage of certain IPC objects. A local attacker could use this to
cause a denial of service (memory exhaustion). (CVE-2021-3759)
Fixed packages 6
| Release | Package | Fixed in |
|---|---|---|
| Ubuntu · 18.04 LTS 18.04:LTS | linux-gke-5.4 | 5.4.0-1055.58~18.04.1 |
| Ubuntu · 18.04 LTS 18.04:LTS | linux-oracle-5.4 | 5.4.0-1057.61~18.04.1 |
| Ubuntu · 18.04 LTS 18.04:LTS | linux-raspi-5.4 | 5.4.0-1046.50~18.04.1 |
| Ubuntu · 20.04 LTS 20.04:LTS | linux-bluefield | 5.4.0-1021.24 |
| Ubuntu · 20.04 LTS 20.04:LTS | linux-oracle | 5.4.0-1057.61 |
| Ubuntu · 20.04 LTS 20.04:LTS | linux-raspi | 5.4.0-1046.50 |
Vulnerabilities 9
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Unscored —
In the Linux kernel 5.0.21, mounting a crafted f2fs filesystem image can lead to slab-out-of-bounds read access in f2fs…
-
Unscored —
An issue was discovered in the Linux kernel before 5.10. drivers/infiniband/core/ucma.c has a use-after-free because th…
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Unscored —
A flaw was found in the Linux kernel. A denial of service problem is identified if an extent tree is corrupted in a cra…
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Unscored —
In the Linux kernel through 5.13.7, an unprivileged BPF program can obtain sensitive information from kernel memory via…
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Unscored —
In the Linux kernel through 5.13.7, an unprivileged BPF program can obtain sensitive information from kernel memory via…
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Unscored —
A NULL pointer dereference flaw was found in the btrfs_rm_device function in fs/btrfs/volumes.c in the Linux Kernel, wh…
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Unscored —
An out-of-bounds (OOB) memory read flaw was found in the Qualcomm IPC router protocol in the Linux kernel. A missing sa…
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Unscored —
A race problem was seen in the vt_k_ioctl in drivers/tty/vt/vt_ioctl.c in the Linux kernel, which may cause an out of b…
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Unscored —
A memory overflow vulnerability was found in the Linux kernel’s ipc functionality of the memcg subsystem, in the way a …
References
-
report
https://ubuntu.com/security/CVE-2019-19449
-
report
https://ubuntu.com/security/CVE-2020-36385
-
report
https://ubuntu.com/security/CVE-2021-3428
-
report
https://ubuntu.com/security/CVE-2021-3739
-
report
https://ubuntu.com/security/CVE-2021-3743
-
report
https://ubuntu.com/security/CVE-2021-3753
-
report
https://ubuntu.com/security/CVE-2021-3759
-
report
https://ubuntu.com/security/CVE-2021-34556
-
report
https://ubuntu.com/security/CVE-2021-35477