Summary
Wen Xu discovered that the xfs file system implementation in the Linux
kernel did not properly validate the number of extents in an inode. An
attacker could use this to construct a malicious xfs image that, when
mounted, could cause a denial of service (system crash). (CVE-2018-13095)
It was discovered that the priority inheritance futex 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 possibly execute arbitrary code. (CVE-2021-3347)
It was discovered that the network block device (nbd) driver in the Linux
kernel contained a use-after-free vulnerability during device setup. A
local attacker with access to the nbd device could use this to cause a
denial of service (system crash) or possibly execute arbitrary code.
(CVE-2021-3348)
Fixed packages 14
| Release | Package | Fixed in |
|---|---|---|
| Ubuntu · 16.04 LTS 16.04:LTS | linux-aws-hwe | 4.15.0-1098.105~16.04.1 |
| Ubuntu · 16.04 LTS 16.04:LTS | linux-azure | 4.15.0-1112.124~16.04.1 |
| Ubuntu · 16.04 LTS 16.04:LTS | linux-gcp | 4.15.0-1097.110~16.04.1 |
| Ubuntu · 16.04 LTS 16.04:LTS | linux-oracle | 4.15.0-1069.77~16.04.1 |
| Ubuntu · 18.04 LTS 18.04:LTS | linux | 4.15.0-141.145 |
| Ubuntu · 18.04 LTS 18.04:LTS | linux-aws | 4.15.0-1098.105 |
| Ubuntu · 18.04 LTS 18.04:LTS | linux-azure-4.15 | 4.15.0-1112.125 |
| Ubuntu · 18.04 LTS 18.04:LTS | linux-dell300x | 4.15.0-1016.20 |
| Ubuntu · 18.04 LTS 18.04:LTS | linux-gcp-4.15 | 4.15.0-1097.110 |
| Ubuntu · 18.04 LTS 18.04:LTS | linux-kvm | 4.15.0-1089.91 |
| Ubuntu · 18.04 LTS 18.04:LTS | linux-oracle | 4.15.0-1069.77 |
| Ubuntu · 18.04 LTS 18.04:LTS | linux-raspi2 | 4.15.0-1083.88 |
| Ubuntu · 18.04 LTS 18.04:LTS | linux-snapdragon | 4.15.0-1100.109 |
| Ubuntu · Pro 14.04 LTS Pro:14.04:LTS | linux-azure | 4.15.0-1112.124~14.04.1 |
Vulnerabilities 3
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High 7.8CVE-2021-3347 Public exploit
An issue was discovered in the Linux kernel through 5.10.11. PI futexes have a kernel stack use-after-free during fault…
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Unscored —
An issue was discovered in fs/xfs/libxfs/xfs_inode_buf.c in the Linux kernel through 4.17.3. A denial of service (memor…
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Unscored —
nbd_add_socket in drivers/block/nbd.c in the Linux kernel through 5.10.12 has an ndb_queue_rq use-after-free that could…