Summary
Norbert Slusarek discovered a race condition in the CAN BCM networking
protocol of the Linux kernel leading to multiple use-after-free
vulnerabilities. A local attacker could use this issue to execute arbitrary
code. (CVE-2021-3609)
It was discovered that the eBPF implementation in the Linux kernel did not
properly track bounds information for 32 bit registers when performing div
and mod operations. A local attacker could use this to possibly execute
arbitrary code. (CVE-2021-3600)
Or Cohen discovered that the SCTP implementation in the Linux kernel
contained a race condition in some situations, leading to a use-after-free
condition. A local attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2021-23133)
Fixed packages 14
| Release | Package | Fixed in |
|---|---|---|
| Ubuntu · 18.04 LTS 18.04:LTS | linux | 4.15.0-147.151 |
| Ubuntu · 18.04 LTS 18.04:LTS | linux-aws | 4.15.0-1106.113 |
| Ubuntu · 18.04 LTS 18.04:LTS | linux-azure-4.15 | 4.15.0-1118.131 |
| Ubuntu · 18.04 LTS 18.04:LTS | linux-dell300x | 4.15.0-1022.26 |
| Ubuntu · 18.04 LTS 18.04:LTS | linux-gcp-4.15 | 4.15.0-1103.116 |
| Ubuntu · 18.04 LTS 18.04:LTS | linux-oracle | 4.15.0-1075.83 |
| Ubuntu · 18.04 LTS 18.04:LTS | linux-raspi2 | 4.15.0-1089.94 |
| Ubuntu · 18.04 LTS 18.04:LTS | linux-snapdragon | 4.15.0-1106.115 |
| Ubuntu · Pro 14.04 LTS Pro:14.04:LTS | linux-azure | 4.15.0-1118.131~14.04.1 |
| Ubuntu · Pro 16.04 LTS Pro:16.04:LTS | linux-aws-hwe | 4.15.0-1106.113~16.04.1 |
| Ubuntu · Pro 16.04 LTS Pro:16.04:LTS | linux-azure | 4.15.0-1118.131~16.04.1 |
| Ubuntu · Pro 16.04 LTS Pro:16.04:LTS | linux-gcp | 4.15.0-1103.116~16.04.1 |
| Ubuntu · Pro 16.04 LTS Pro:16.04:LTS | linux-hwe | 4.15.0-147.151~16.04.1 |
| Ubuntu · Pro 16.04 LTS Pro:16.04:LTS | linux-oracle | 4.15.0-1075.83~16.04.1 |
Vulnerabilities 3
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High 7.8
It was discovered that the eBPF implementation in the Linux kernel did not properly track bounds information for 32 bit…
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Medium 6.7
Linux Kernel sctp_destroy_sock race condition
A race condition in Linux kernel SCTP sockets (net/sctp/socket.c) before 5.12-rc8 can lead to kernel privilege escalation from the context of a network service or an unprivileged process. If sctp_destroy_sock is called without sock_net(sk)->sctp.addr_wq_lock …
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Unscored —
.A flaw was found in the CAN BCM networking protocol in the Linux kernel, where a local attacker can abuse a flaw in th…