Summary
Lin Ma discovered a race condition in the io_uring subsystem in the Linux
kernel, leading to a null pointer dereference vulnerability. A local
attacker could use this to cause a denial of service (system crash).(CVE-2023-0468)
It was discovered that the Traffic-Control Index (TCINDEX) implementation
in the Linux kernel contained 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-2023-1281)
Fixed packages 33
| Release | Package | Fixed in |
|---|---|---|
| Ubuntu · Pro 16.04 LTS Pro:16.04:LTS | linux-aws-hwe | 4.15.0-1154.167~16.04.1 |
| Ubuntu · Pro 16.04 LTS Pro:16.04:LTS | linux-azure | 4.15.0-1163.178~16.04.1 |
| Ubuntu · Pro 16.04 LTS Pro:16.04:LTS | linux-gcp | 4.15.0-1148.164~16.04.1 |
| Ubuntu · Pro 16.04 LTS Pro:16.04:LTS | linux-hwe | 4.15.0-209.220~16.04.1 |
| Ubuntu · Pro 18.04 LTS Pro:18.04:LTS | linux | 4.15.0-209.220 |
| Ubuntu · Pro 18.04 LTS Pro:18.04:LTS | linux-aws | 4.15.0-1154.167 |
| Ubuntu · Pro 18.04 LTS Pro:18.04:LTS | linux-aws-5.4 | 5.4.0-1100.108~18.04.1 |
| Ubuntu · Pro 18.04 LTS Pro:18.04:LTS | linux-azure-4.15 | 4.15.0-1163.178 |
| Ubuntu · Pro 18.04 LTS Pro:18.04:LTS | linux-azure-5.4 | 5.4.0-1106.112~18.04.1 |
| Ubuntu · Pro 18.04 LTS Pro:18.04:LTS | linux-gcp-4.15 | 4.15.0-1148.164 |
| Ubuntu · Pro 18.04 LTS Pro:18.04:LTS | linux-gcp-5.4 | 5.4.0-1103.112~18.04.1 |
| Ubuntu · Pro 18.04 LTS Pro:18.04:LTS | linux-gke-4.15 | — |
| Ubuntu · Pro 18.04 LTS Pro:18.04:LTS | linux-gke-5.4 | — |
| Ubuntu · Pro 18.04 LTS Pro:18.04:LTS | linux-gkeop-5.4 | — |
| Ubuntu · Pro 18.04 LTS Pro:18.04:LTS | linux-hwe-5.4 | 5.4.0-147.164~18.04.1 |
| Ubuntu · Pro 18.04 LTS Pro:18.04:LTS | linux-ibm-5.4 | 5.4.0-1047.52~18.04.1 |
| Ubuntu · Pro 18.04 LTS Pro:18.04:LTS | linux-oem | — |
| Ubuntu · Pro 20.04 LTS Pro:20.04:LTS | linux | 5.4.0-147.164 |
| Ubuntu · Pro 20.04 LTS Pro:20.04:LTS | linux-aws | 5.4.0-1100.108 |
| Ubuntu · Pro 20.04 LTS Pro:20.04:LTS | linux-aws-5.15 | 5.15.0-1034.38~20.04.1 |
| Ubuntu · Pro 20.04 LTS Pro:20.04:LTS | linux-azure | 5.4.0-1106.112 |
| Ubuntu · Pro 20.04 LTS Pro:20.04:LTS | linux-gcp | 5.4.0-1103.112 |
| Ubuntu · Pro 20.04 LTS Pro:20.04:LTS | linux-gcp-5.15 | 5.15.0-1032.40~20.04.1 |
| Ubuntu · Pro 20.04 LTS Pro:20.04:LTS | linux-gke | 5.4.0-1097.104 |
| Ubuntu · Pro 20.04 LTS Pro:20.04:LTS | linux-gke-5.15 | 5.15.0-1031.36~20.04.1 |
| Ubuntu · Pro 20.04 LTS Pro:20.04:LTS | linux-gkeop | 5.4.0-1067.71 |
| Ubuntu · Pro 20.04 LTS Pro:20.04:LTS | linux-ibm | 5.4.0-1047.52 |
| Ubuntu · Pro 22.04 LTS Pro:22.04:LTS | linux | 5.15.0-70.77 |
| Ubuntu · Pro 22.04 LTS Pro:22.04:LTS | linux-aws | 5.15.0-1034.38 |
| Ubuntu · Pro 22.04 LTS Pro:22.04:LTS | linux-azure | 5.15.0-1036.43 |
| Ubuntu · Pro 22.04 LTS Pro:22.04:LTS | linux-gcp | 5.15.0-1032.40 |
| Ubuntu · Pro 22.04 LTS Pro:22.04:LTS | linux-gke | 5.15.0-1031.36 |
| Ubuntu · Pro 22.04 LTS Pro:22.04:LTS | linux-ibm | 5.15.0-1028.31 |
Vulnerabilities 2
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High 7.8CVE-2023-1281 Public exploit
UAF in Linux kernel's tcindex (traffic control index filter) implementation
Use After Free vulnerability in Linux kernel traffic control index filter (tcindex) allows Privilege Escalation. The imperfect hash area can be updated while packets are traversing, which will cause a use-after-free when 'tcf_exts_exec()' is called with the d…
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Medium 4.7
A use-after-free flaw was found in io_uring/poll.c in io_poll_check_events in the io_uring subcomponent in the Linux Ke…