# CVE-2023-53817: linux: In the Linux kernel, the following vulnerability has been resolved:  crypto: lib/mpi - avoid null pointer deref in mp...

CVE-2023-53817 is fixed in 36 products on 1 platform, first by ALAS2023-2023-356, released September 27, 2023. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2023-53817
- Priority: High
- CVSS: 7.5 (high)
- EPSS: 0.0054
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 27, 2023

## Description

In the Linux kernel, the following vulnerability has been resolved:  crypto: lib/mpi - avoid null pointer deref in mpi_cmp_ui()  During NVMeTCP Authentication a controller can trigger a kernel oops by specifying the 8192 bit Diffie Hellman group and passing a correctly sized, but zeroed Diffie Hellamn value. mpi_cmp_ui() was detecting this if the second parameter was 0, but 1 is passed from dh_is_pubkey_valid(). This causes the null pointer u->d to be dereferenced towards the end of mpi_cmp_ui()

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | bpftool amzn 2023 | 6.1.55-75.123.amzn2023 | [ALAS2023-2023-356](https://patchblox.com/security/data/fix/linux/alas2023-2023-356.md) | Sep 27, 2023 |
| Linux | bpftool-debuginfo amzn 2023 | 6.1.55-75.123.amzn2023 | [ALAS2023-2023-356](https://patchblox.com/security/data/fix/linux/alas2023-2023-356.md) | Sep 27, 2023 |
| Linux | dtb-aarch64 opensuse-leap 15.6 | 6.4.0-150600.23.92.1 | [SUSE-SU-2026:1041-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1041-1.md) | Mar 25, 2026 |
| Linux | kernel amzn 2023 | 6.1.55-75.123.amzn2023 | [ALAS2023-2023-356](https://patchblox.com/security/data/fix/linux/alas2023-2023-356.md) | Sep 27, 2023 |
| Linux | kernel-64kb opensuse-leap 15.6 | 6.4.0-150600.23.92.1 | [SUSE-SU-2026:1041-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1041-1.md) | Mar 25, 2026 |
| Linux | kernel-64kb sles 15.7 | 6.4.0-150700.53.34.1 | [SUSE-SU-2026:1081-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1081-1.md) | Mar 26, 2026 |
| Linux | kernel-azure sles 15.7 | 6.4.0-150700.53.34.1 | [SUSE-SU-2026:1081-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1081-1.md) | Mar 26, 2026 |
| Linux | kernel-debug opensuse-leap 15.6 | 6.4.0-150600.23.92.1 | [SUSE-SU-2026:1041-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1041-1.md) | Mar 25, 2026 |
| Linux | kernel-debuginfo amzn 2023 | 6.1.55-75.123.amzn2023 | [ALAS2023-2023-356](https://patchblox.com/security/data/fix/linux/alas2023-2023-356.md) | Sep 27, 2023 |
| Linux | kernel-debuginfo-common-aarch64 amzn 2023 | 6.1.55-75.123.amzn2023 | [ALAS2023-2023-356](https://patchblox.com/security/data/fix/linux/alas2023-2023-356.md) | Sep 27, 2023 |
| Linux | kernel-debuginfo-common-x86_64 amzn 2023 | 6.1.55-75.123.amzn2023 | [ALAS2023-2023-356](https://patchblox.com/security/data/fix/linux/alas2023-2023-356.md) | Sep 27, 2023 |
| Linux | kernel-default opensuse-leap 15.6 | 6.4.0-150600.23.92.1 | [SUSE-SU-2026:1041-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1041-1.md) | Mar 25, 2026 |
| Linux | kernel-default sles 15.6 | 6.4.0-150600.23.92.1 | [SUSE-SU-2026:1041-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1041-1.md) | Mar 25, 2026 |
| Linux | kernel-default sles 15.7 | 6.4.0-150700.53.34.1 | [SUSE-SU-2026:1081-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1081-1.md) | Mar 26, 2026 |
| Linux | kernel-default-base opensuse-leap 15.6 | 6.4.0-150600.23.92.1.150600.12.42.2 | [SUSE-SU-2026:1041-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1041-1.md) | Mar 25, 2026 |
| Linux | kernel-default-base sles 15.6 | 6.4.0-150600.23.92.1.150600.12.42.2 | [SUSE-SU-2026:1041-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1041-1.md) | Mar 25, 2026 |
| Linux | kernel-default-base sles 15.7 | 6.4.0-150700.53.34.1.150700.17.23.1 | [SUSE-SU-2026:1081-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1081-1.md) | Mar 26, 2026 |
| Linux | kernel-devel amzn 2023 | 6.1.55-75.123.amzn2023 | [ALAS2023-2023-356](https://patchblox.com/security/data/fix/linux/alas2023-2023-356.md) | Sep 27, 2023 |
| Linux | kernel-docs opensuse-leap 15.6 | 6.4.0-150600.23.92.1 | [SUSE-SU-2026:1041-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1041-1.md) | Mar 25, 2026 |
| Linux | kernel-docs sles 15.6 | 6.4.0-150600.23.92.1 | [SUSE-SU-2026:1041-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1041-1.md) | Mar 25, 2026 |
| Linux | kernel-docs sles 15.7 | 6.4.0-150700.53.34.1 | [SUSE-SU-2026:1081-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1081-1.md) | Mar 26, 2026 |
| Linux | kernel-headers amzn 2023 | 6.1.55-75.123.amzn2023 | [ALAS2023-2023-356](https://patchblox.com/security/data/fix/linux/alas2023-2023-356.md) | Sep 27, 2023 |
| Linux | kernel-kvmsmall opensuse-leap 15.6 | 6.4.0-150600.23.92.1 | [SUSE-SU-2026:1041-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1041-1.md) | Mar 25, 2026 |
| Linux | kernel-libbpf amzn 2023 | 6.1.55-75.123.amzn2023 | [ALAS2023-2023-356](https://patchblox.com/security/data/fix/linux/alas2023-2023-356.md) | Sep 27, 2023 |
| Linux | kernel-libbpf-devel amzn 2023 | 6.1.55-75.123.amzn2023 | [ALAS2023-2023-356](https://patchblox.com/security/data/fix/linux/alas2023-2023-356.md) | Sep 27, 2023 |
| Linux | kernel-libbpf-static amzn 2023 | 6.1.55-75.123.amzn2023 | [ALAS2023-2023-356](https://patchblox.com/security/data/fix/linux/alas2023-2023-356.md) | Sep 27, 2023 |
| Linux | kernel-livepatch-6.1.55-75.123 amzn 2023 | 1.0-0.amzn2023 | [ALAS2023-2023-356](https://patchblox.com/security/data/fix/linux/alas2023-2023-356.md) | Sep 27, 2023 |
| Linux | kernel-livepatch-SLE15-SP6_Update_21 sles 15.6 | 1-150600.13.5.1 | [SUSE-SU-2026:1041-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1041-1.md) | Mar 25, 2026 |
| Linux | kernel-livepatch-SLE15-SP7-RT_Update_10 sles 15.7 | 1-150700.1.3.1 | [SUSE-SU-2026:0962-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0962-1.md) | Mar 23, 2026 |
| Linux | kernel-livepatch-SLE15-SP7_Update_10 sles 15.7 | 1-150700.15.3.1 | [SUSE-SU-2026:1081-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1081-1.md) | Mar 26, 2026 |
| Linux | kernel-obs-build opensuse-leap 15.6 | 6.4.0-150600.23.92.1 | [SUSE-SU-2026:1041-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1041-1.md) | Mar 25, 2026 |
| Linux | kernel-obs-build sles 15.6 | 6.4.0-150600.23.92.1 | [SUSE-SU-2026:1041-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1041-1.md) | Mar 25, 2026 |
| Linux | kernel-obs-build sles 15.7 | 6.4.0-150700.53.34.1 | [SUSE-SU-2026:1081-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1081-1.md) | Mar 26, 2026 |
| Linux | kernel-obs-qa opensuse-leap 15.6 | 6.4.0-150600.23.92.1 | [SUSE-SU-2026:1041-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1041-1.md) | Mar 25, 2026 |
| Linux | kernel-source opensuse-leap 15.6 | 6.4.0-150600.23.92.1 | [SUSE-SU-2026:1041-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1041-1.md) | Mar 25, 2026 |
| Linux | kernel-source sles 15.6 | 6.4.0-150600.23.92.1 | [SUSE-SU-2026:1041-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1041-1.md) | Mar 25, 2026 |
| Linux | kernel-source sles 15.7 | 6.4.0-150700.53.34.1 | [SUSE-SU-2026:1081-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1081-1.md) | Mar 26, 2026 |
| Linux | kernel-syms opensuse-leap 15.6 | 6.4.0-150600.23.92.1 | [SUSE-SU-2026:1041-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1041-1.md) | Mar 25, 2026 |
| Linux | kernel-syms sles 15.6 | 6.4.0-150600.23.92.1 | [SUSE-SU-2026:1041-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1041-1.md) | Mar 25, 2026 |
| Linux | kernel-syms sles 15.7 | 6.4.0-150700.53.34.1 | [SUSE-SU-2026:1081-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1081-1.md) | Mar 26, 2026 |
| Linux | kernel-tools amzn 2023 | 6.1.55-75.123.amzn2023 | [ALAS2023-2023-356](https://patchblox.com/security/data/fix/linux/alas2023-2023-356.md) | Sep 27, 2023 |
| Linux | kernel-tools-debuginfo amzn 2023 | 6.1.55-75.123.amzn2023 | [ALAS2023-2023-356](https://patchblox.com/security/data/fix/linux/alas2023-2023-356.md) | Sep 27, 2023 |
| Linux | kernel-tools-devel amzn 2023 | 6.1.55-75.123.amzn2023 | [ALAS2023-2023-356](https://patchblox.com/security/data/fix/linux/alas2023-2023-356.md) | Sep 27, 2023 |
| Linux | kernel-zfcpdump opensuse-leap 15.6 | 6.4.0-150600.23.92.1 | [SUSE-SU-2026:1041-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1041-1.md) | Mar 25, 2026 |
| Linux | kernel-zfcpdump sles 15.7 | 6.4.0-150700.53.34.1 | [SUSE-SU-2026:1081-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1081-1.md) | Mar 26, 2026 |
| Linux | linux Debian 12.15 (bookworm) | 6.1.55-1 | [DEBIAN-CVE-2023-53817](https://patchblox.com/security/data/fix/linux/debian-cve-2023-53817.md) | Dec 9, 2025 |
| Linux | linux Debian 13.5 (trixie) | 6.5.6-1 | [DEBIAN-CVE-2023-53817](https://patchblox.com/security/data/fix/linux/debian-cve-2023-53817.md) | Dec 9, 2025 |
| Linux | linux Debian 14 | 6.5.6-1 | [DEBIAN-CVE-2023-53817](https://patchblox.com/security/data/fix/linux/debian-cve-2023-53817.md) | Dec 9, 2025 |
| Linux | perf amzn 2023 | 6.1.55-75.123.amzn2023 | [ALAS2023-2023-356](https://patchblox.com/security/data/fix/linux/alas2023-2023-356.md) | Sep 27, 2023 |
| Linux | perf-debuginfo amzn 2023 | 6.1.55-75.123.amzn2023 | [ALAS2023-2023-356](https://patchblox.com/security/data/fix/linux/alas2023-2023-356.md) | Sep 27, 2023 |
| Linux | python3-perf amzn 2023 | 6.1.55-75.123.amzn2023 | [ALAS2023-2023-356](https://patchblox.com/security/data/fix/linux/alas2023-2023-356.md) | Sep 27, 2023 |
| Linux | python3-perf-debuginfo amzn 2023 | 6.1.55-75.123.amzn2023 | [ALAS2023-2023-356](https://patchblox.com/security/data/fix/linux/alas2023-2023-356.md) | Sep 27, 2023 |

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