linux: Transmit requests in Xen's virtual network protocol can consist of multiple parts
CVE-2023-46838 is fixed in 22 products on 1 platform, first by DEBIAN-CVE-2023-46838, released January 29, 2024. It is not reported as exploited. Patch Radar priority: High.
Transmit requests in Xen's virtual network protocol can consist of multiple parts. While not really useful, except for the initial part any of them may be of zero length, i.e. carry no data at all. Besides a certain initial portion of the to be transferred data, these parts are directly translated into what Linux calls SKB fragments. Such converted request parts can, when for a particular SKB they are all of length zero, lead to a de-reference of NULL in core networking code.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| bpftool · amzn 2023 | 6.1.75-99.163.amzn2023 | ALAS2023-2024-519 | Feb 15, 2024 |
| bpftool-debuginfo · amzn 2023 | 6.1.75-99.163.amzn2023 | ALAS2023-2024-519 | Feb 15, 2024 |
| kernel · amzn 2023 | 6.1.75-99.163.amzn2023 | ALAS2023-2024-519 | Feb 15, 2024 |
| kernel-debuginfo · amzn 2023 | 6.1.75-99.163.amzn2023 | ALAS2023-2024-519 | Feb 15, 2024 |
| kernel-debuginfo-common-aarch64 · amzn 2023 | 6.1.75-99.163.amzn2023 | ALAS2023-2024-519 | Feb 15, 2024 |
| kernel-debuginfo-common-x86_64 · amzn 2023 | 6.1.75-99.163.amzn2023 | ALAS2023-2024-519 | Feb 15, 2024 |
| kernel-devel · amzn 2023 | 6.1.75-99.163.amzn2023 | ALAS2023-2024-519 | Feb 15, 2024 |
| kernel-headers · amzn 2023 | 6.1.75-99.163.amzn2023 | ALAS2023-2024-519 | Feb 15, 2024 |
| kernel-libbpf · amzn 2023 | 6.1.75-99.163.amzn2023 | ALAS2023-2024-519 | Feb 15, 2024 |
| kernel-libbpf-devel · amzn 2023 | 6.1.75-99.163.amzn2023 | ALAS2023-2024-519 | Feb 15, 2024 |
| kernel-libbpf-static · amzn 2023 | 6.1.75-99.163.amzn2023 | ALAS2023-2024-519 | Feb 15, 2024 |
| kernel-livepatch-6.1.75-99.163 · amzn 2023 | 1.0-0.amzn2023 | ALAS2023-2024-519 | Feb 15, 2024 |
| kernel-modules-extra · amzn 2023 | 6.1.75-99.163.amzn2023 | ALAS2023-2024-519 | Feb 15, 2024 |
| kernel-modules-extra-common · amzn 2023 | 6.1.75-99.163.amzn2023 | ALAS2023-2024-519 | Feb 15, 2024 |
| kernel-tools · amzn 2023 | 6.1.75-99.163.amzn2023 | ALAS2023-2024-519 | Feb 15, 2024 |
| kernel-tools-debuginfo · amzn 2023 | 6.1.75-99.163.amzn2023 | ALAS2023-2024-519 | Feb 15, 2024 |
| kernel-tools-devel · amzn 2023 | 6.1.75-99.163.amzn2023 | ALAS2023-2024-519 | Feb 15, 2024 |
| linux · Debian 12.15 (bookworm) | 6.1.76-1 | DEBIAN-CVE-2023-46838 | Jan 29, 2024 |
| linux · Debian 13.5 (trixie) | 6.6.15-1 | DEBIAN-CVE-2023-46838 | Jan 29, 2024 |
| linux · Debian 14 | 6.6.15-1 | DEBIAN-CVE-2023-46838 | Jan 29, 2024 |
| perf · amzn 2023 | 6.1.75-99.163.amzn2023 | ALAS2023-2024-519 | Feb 15, 2024 |
| perf-debuginfo · amzn 2023 | 6.1.75-99.163.amzn2023 | ALAS2023-2024-519 | Feb 15, 2024 |
| python3-perf · amzn 2023 | 6.1.75-99.163.amzn2023 | ALAS2023-2024-519 | Feb 15, 2024 |
| python3-perf-debuginfo · amzn 2023 | 6.1.75-99.163.amzn2023 | ALAS2023-2024-519 | Feb 15, 2024 |
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