# CVE-2024-42161: linux: In the Linux kernel, the following vulnerability has been resolved:  bpf: Avoid uninitialized value in BPF_CORE_READ_...

CVE-2024-42161 is fixed in 56 products on 1 platform, first by DEBIAN-CVE-2024-42161, released July 30, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2024-42161
- Priority: Routine
- CVSS: 6.3 (medium)
- EPSS: 0.0022
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 30, 2024

## Description

In the Linux kernel, the following vulnerability has been resolved:  bpf: Avoid uninitialized value in BPF_CORE_READ_BITFIELD  [Changes from V1:  - Use a default branch in the switch statement to initialize `val'.]  GCC warns that `val' may be used uninitialized in the BPF_CRE_READ_BITFIELD macro, defined in bpf_core_read.h as:  	[...] 	unsigned long long val;						      \ 	[...]								      \ 	switch (__CORE_RELO(s, field, BYTE_SIZE)) {			      \ 	case 1: val = *(const unsigned char *)p; break;			      \ 	case 2: val = *(const unsigned short *)p; break;		      \ 	case 4: val = *(const unsigned int *)p; break;			      \ 	case 8: val = *(const unsigned long long *)p; break;		      \         }       							      \ 	[...] 	val;								      \ 	}								      \  This patch adds a default entry in the switch statement that sets `val' to zero in order to avoid the warning, and random values to be used in case __builtin_preserve_field_info returns unexpected values for BPF_FIELD_BYTE_SIZE.  Tested in bpf-next master. No regressions.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | bpftool amzn 2023 | 6.1.102-108.177.amzn2023 | [ALAS2023-2024-679](https://patchblox.com/security/data/fix/linux/alas2023-2024-679.md) | Aug 1, 2024 |
| Linux | bpftool ol 8 | 0:5.15.0-210.163.7.el9uek | [ELSA-2024-12618](https://patchblox.com/security/data/fix/linux/elsa-2024-12618.md) | Sep 12, 2024 |
| Linux | bpftool ol 9 | 0:5.15.0-210.163.7.el9uek | [ELSA-2024-12618](https://patchblox.com/security/data/fix/linux/elsa-2024-12618.md) | Sep 12, 2024 |
| Linux | bpftool-debuginfo amzn 2023 | 6.1.102-108.177.amzn2023 | [ALAS2023-2024-679](https://patchblox.com/security/data/fix/linux/alas2023-2024-679.md) | Aug 1, 2024 |
| Linux | dtb-aarch64 opensuse-leap 15.6 | 6.4.0-150600.23.22.1 | [SUSE-SU-2024:3383-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3383-1.md) | Sep 23, 2024 |
| Linux | kernel amzn 2023 | 6.1.102-108.177.amzn2023 | [ALAS2023-2024-679](https://patchblox.com/security/data/fix/linux/alas2023-2024-679.md) | Aug 1, 2024 |
| Linux | kernel-64kb opensuse-leap 15.6 | 6.4.0-150600.23.22.1 | [SUSE-SU-2024:3383-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3383-1.md) | Sep 23, 2024 |
| Linux | kernel-64kb sles 15.6 | 6.4.0-150600.23.22.1 | [SUSE-SU-2024:3383-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3383-1.md) | Sep 23, 2024 |
| Linux | kernel-azure opensuse-leap 15.6 | 6.4.0-150600.8.11.1 | [SUSE-SU-2024:3194-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3194-1.md) | Sep 10, 2024 |
| Linux | kernel-azure sles 15.6 | 6.4.0-150600.8.11.1 | [SUSE-SU-2024:3194-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3194-1.md) | Sep 10, 2024 |
| Linux | kernel-debug opensuse-leap 15.6 | 6.4.0-150600.23.22.1 | [SUSE-SU-2024:3383-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3383-1.md) | Sep 23, 2024 |
| Linux | kernel-debuginfo amzn 2023 | 6.1.102-108.177.amzn2023 | [ALAS2023-2024-679](https://patchblox.com/security/data/fix/linux/alas2023-2024-679.md) | Aug 1, 2024 |
| Linux | kernel-debuginfo-common-aarch64 amzn 2023 | 6.1.102-108.177.amzn2023 | [ALAS2023-2024-679](https://patchblox.com/security/data/fix/linux/alas2023-2024-679.md) | Aug 1, 2024 |
| Linux | kernel-debuginfo-common-x86_64 amzn 2023 | 6.1.102-108.177.amzn2023 | [ALAS2023-2024-679](https://patchblox.com/security/data/fix/linux/alas2023-2024-679.md) | Aug 1, 2024 |
| Linux | kernel-default opensuse-leap 15.6 | 6.4.0-150600.23.22.1 | [SUSE-SU-2024:3383-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3383-1.md) | Sep 23, 2024 |
| Linux | kernel-default sles 15.6 | 6.4.0-150600.23.22.1 | [SUSE-SU-2024:3383-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3383-1.md) | Sep 23, 2024 |
| Linux | kernel-default-base opensuse-leap 15.6 | 6.4.0-150600.23.22.1.150600.12.8.3 | [SUSE-SU-2024:3383-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3383-1.md) | Sep 23, 2024 |
| Linux | kernel-default-base sles 15.6 | 6.4.0-150600.23.22.1.150600.12.8.3 | [SUSE-SU-2024:3383-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3383-1.md) | Sep 23, 2024 |
| Linux | kernel-devel amzn 2023 | 6.1.102-108.177.amzn2023 | [ALAS2023-2024-679](https://patchblox.com/security/data/fix/linux/alas2023-2024-679.md) | Aug 1, 2024 |
| Linux | kernel-docs opensuse-leap 15.6 | 6.4.0-150600.23.22.1 | [SUSE-SU-2024:3383-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3383-1.md) | Sep 23, 2024 |
| Linux | kernel-docs sles 15.6 | 6.4.0-150600.23.22.1 | [SUSE-SU-2024:3383-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3383-1.md) | Sep 23, 2024 |
| Linux | kernel-headers amzn 2023 | 6.1.102-108.177.amzn2023 | [ALAS2023-2024-679](https://patchblox.com/security/data/fix/linux/alas2023-2024-679.md) | Aug 1, 2024 |
| Linux | kernel-kvmsmall opensuse-leap 15.6 | 6.4.0-150600.23.22.1 | [SUSE-SU-2024:3383-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3383-1.md) | Sep 23, 2024 |
| Linux | kernel-libbpf amzn 2023 | 6.1.102-108.177.amzn2023 | [ALAS2023-2024-679](https://patchblox.com/security/data/fix/linux/alas2023-2024-679.md) | Aug 1, 2024 |
| Linux | kernel-libbpf-devel amzn 2023 | 6.1.102-108.177.amzn2023 | [ALAS2023-2024-679](https://patchblox.com/security/data/fix/linux/alas2023-2024-679.md) | Aug 1, 2024 |
| Linux | kernel-libbpf-static amzn 2023 | 6.1.102-108.177.amzn2023 | [ALAS2023-2024-679](https://patchblox.com/security/data/fix/linux/alas2023-2024-679.md) | Aug 1, 2024 |
| Linux | kernel-livepatch-6.1.102-108.177 amzn 2023 | 1.0-0.amzn2023 | [ALAS2023-2024-679](https://patchblox.com/security/data/fix/linux/alas2023-2024-679.md) | Aug 1, 2024 |
| Linux | kernel-livepatch-SLE15-SP6-RT_Update_2 sles 15.6 | 1-150600.1.3.2 | [SUSE-SU-2024:3195-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3195-1.md) | Sep 10, 2024 |
| Linux | kernel-livepatch-SLE15-SP6_Update_4 sles 15.6 | 1-150600.13.3.3 | [SUSE-SU-2024:3383-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3383-1.md) | Sep 23, 2024 |
| Linux | kernel-modules-extra amzn 2023 | 6.1.102-108.177.amzn2023 | [ALAS2023-2024-679](https://patchblox.com/security/data/fix/linux/alas2023-2024-679.md) | Aug 1, 2024 |
| Linux | kernel-modules-extra-common amzn 2023 | 6.1.102-108.177.amzn2023 | [ALAS2023-2024-679](https://patchblox.com/security/data/fix/linux/alas2023-2024-679.md) | Aug 1, 2024 |
| Linux | kernel-obs-build opensuse-leap 15.6 | 6.4.0-150600.23.22.1 | [SUSE-SU-2024:3383-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3383-1.md) | Sep 23, 2024 |
| Linux | kernel-obs-build sles 15.6 | 6.4.0-150600.23.22.1 | [SUSE-SU-2024:3383-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3383-1.md) | Sep 23, 2024 |
| Linux | kernel-obs-qa opensuse-leap 15.6 | 6.4.0-150600.23.22.1 | [SUSE-SU-2024:3383-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3383-1.md) | Sep 23, 2024 |
| Linux | kernel-rt opensuse-leap 15.6 | 6.4.0-150600.10.8.3 | [SUSE-SU-2024:3195-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3195-1.md) | Sep 10, 2024 |
| Linux | kernel-rt_debug opensuse-leap 15.6 | 6.4.0-150600.10.8.3 | [SUSE-SU-2024:3195-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3195-1.md) | Sep 10, 2024 |
| Linux | kernel-source opensuse-leap 15.6 | 6.4.0-150600.23.22.1 | [SUSE-SU-2024:3383-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3383-1.md) | Sep 23, 2024 |
| Linux | kernel-source sles 15.6 | 6.4.0-150600.23.22.1 | [SUSE-SU-2024:3383-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3383-1.md) | Sep 23, 2024 |
| Linux | kernel-source-azure opensuse-leap 15.6 | 6.4.0-150600.8.11.1 | [SUSE-SU-2024:3194-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3194-1.md) | Sep 10, 2024 |
| Linux | kernel-source-azure sles 15.6 | 6.4.0-150600.8.11.1 | [SUSE-SU-2024:3194-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3194-1.md) | Sep 10, 2024 |
| Linux | kernel-source-rt opensuse-leap 15.6 | 6.4.0-150600.10.8.3 | [SUSE-SU-2024:3195-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3195-1.md) | Sep 10, 2024 |
| Linux | kernel-syms opensuse-leap 15.6 | 6.4.0-150600.23.22.1 | [SUSE-SU-2024:3383-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3383-1.md) | Sep 23, 2024 |
| Linux | kernel-syms sles 15.6 | 6.4.0-150600.23.22.1 | [SUSE-SU-2024:3383-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3383-1.md) | Sep 23, 2024 |
| Linux | kernel-syms-azure opensuse-leap 15.6 | 6.4.0-150600.8.11.1 | [SUSE-SU-2024:3194-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3194-1.md) | Sep 10, 2024 |
| Linux | kernel-syms-azure sles 15.6 | 6.4.0-150600.8.11.1 | [SUSE-SU-2024:3194-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3194-1.md) | Sep 10, 2024 |
| Linux | kernel-syms-rt opensuse-leap 15.6 | 6.4.0-150600.10.8.1 | [SUSE-SU-2024:3195-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3195-1.md) | Sep 10, 2024 |
| Linux | kernel-tools amzn 2023 | 6.1.102-108.177.amzn2023 | [ALAS2023-2024-679](https://patchblox.com/security/data/fix/linux/alas2023-2024-679.md) | Aug 1, 2024 |
| Linux | kernel-tools-debuginfo amzn 2023 | 6.1.102-108.177.amzn2023 | [ALAS2023-2024-679](https://patchblox.com/security/data/fix/linux/alas2023-2024-679.md) | Aug 1, 2024 |
| Linux | kernel-tools-devel amzn 2023 | 6.1.102-108.177.amzn2023 | [ALAS2023-2024-679](https://patchblox.com/security/data/fix/linux/alas2023-2024-679.md) | Aug 1, 2024 |
| Linux | kernel-uek ol 8 | 0:5.15.0-210.163.7.el9uek | [ELSA-2024-12618](https://patchblox.com/security/data/fix/linux/elsa-2024-12618.md) | Sep 12, 2024 |
| Linux | kernel-uek ol 9 | 0:5.15.0-210.163.7.el9uek | [ELSA-2024-12618](https://patchblox.com/security/data/fix/linux/elsa-2024-12618.md) | Sep 12, 2024 |
| Linux | kernel-uek-container ol 8 | 0:5.15.0-210.163.7.el9uek | [ELSA-2024-12618](https://patchblox.com/security/data/fix/linux/elsa-2024-12618.md) | Sep 12, 2024 |
| Linux | kernel-uek-container ol 9 | 0:5.15.0-210.163.7.el9uek | [ELSA-2024-12618](https://patchblox.com/security/data/fix/linux/elsa-2024-12618.md) | Sep 12, 2024 |
| Linux | kernel-uek-container-debug ol 8 | 0:5.15.0-210.163.7.el9uek | [ELSA-2024-12618](https://patchblox.com/security/data/fix/linux/elsa-2024-12618.md) | Sep 12, 2024 |
| Linux | kernel-uek-container-debug ol 9 | 0:5.15.0-210.163.7.el9uek | [ELSA-2024-12618](https://patchblox.com/security/data/fix/linux/elsa-2024-12618.md) | Sep 12, 2024 |
| Linux | kernel-uek-core ol 8 | 0:5.15.0-210.163.7.el9uek | [ELSA-2024-12618](https://patchblox.com/security/data/fix/linux/elsa-2024-12618.md) | Sep 12, 2024 |
| Linux | kernel-uek-core ol 9 | 0:5.15.0-210.163.7.el9uek | [ELSA-2024-12618](https://patchblox.com/security/data/fix/linux/elsa-2024-12618.md) | Sep 12, 2024 |
| Linux | kernel-uek-debug ol 8 | 0:5.15.0-210.163.7.el9uek | [ELSA-2024-12618](https://patchblox.com/security/data/fix/linux/elsa-2024-12618.md) | Sep 12, 2024 |
| Linux | kernel-uek-debug ol 9 | 0:5.15.0-210.163.7.el9uek | [ELSA-2024-12618](https://patchblox.com/security/data/fix/linux/elsa-2024-12618.md) | Sep 12, 2024 |
| Linux | kernel-uek-debug-core ol 8 | 0:5.15.0-210.163.7.el9uek | [ELSA-2024-12618](https://patchblox.com/security/data/fix/linux/elsa-2024-12618.md) | Sep 12, 2024 |
| Linux | kernel-uek-debug-core ol 9 | 0:5.15.0-210.163.7.el9uek | [ELSA-2024-12618](https://patchblox.com/security/data/fix/linux/elsa-2024-12618.md) | Sep 12, 2024 |
| Linux | kernel-uek-debug-devel ol 8 | 0:5.15.0-210.163.7.el9uek | [ELSA-2024-12618](https://patchblox.com/security/data/fix/linux/elsa-2024-12618.md) | Sep 12, 2024 |
| Linux | kernel-uek-debug-devel ol 9 | 0:5.15.0-210.163.7.el9uek | [ELSA-2024-12618](https://patchblox.com/security/data/fix/linux/elsa-2024-12618.md) | Sep 12, 2024 |
| Linux | kernel-uek-debug-modules ol 8 | 0:5.15.0-210.163.7.el9uek | [ELSA-2024-12618](https://patchblox.com/security/data/fix/linux/elsa-2024-12618.md) | Sep 12, 2024 |
| Linux | kernel-uek-debug-modules ol 9 | 0:5.15.0-210.163.7.el9uek | [ELSA-2024-12618](https://patchblox.com/security/data/fix/linux/elsa-2024-12618.md) | Sep 12, 2024 |
| Linux | kernel-uek-debug-modules-extra ol 8 | 0:5.15.0-210.163.7.el9uek | [ELSA-2024-12618](https://patchblox.com/security/data/fix/linux/elsa-2024-12618.md) | Sep 12, 2024 |
| Linux | kernel-uek-debug-modules-extra ol 9 | 0:5.15.0-210.163.7.el9uek | [ELSA-2024-12618](https://patchblox.com/security/data/fix/linux/elsa-2024-12618.md) | Sep 12, 2024 |
| Linux | kernel-uek-devel ol 8 | 0:5.15.0-210.163.7.el9uek | [ELSA-2024-12618](https://patchblox.com/security/data/fix/linux/elsa-2024-12618.md) | Sep 12, 2024 |
| Linux | kernel-uek-devel ol 9 | 0:5.15.0-210.163.7.el9uek | [ELSA-2024-12618](https://patchblox.com/security/data/fix/linux/elsa-2024-12618.md) | Sep 12, 2024 |
| Linux | kernel-uek-doc ol 8 | 0:5.15.0-210.163.7.el9uek | [ELSA-2024-12618](https://patchblox.com/security/data/fix/linux/elsa-2024-12618.md) | Sep 12, 2024 |
| Linux | kernel-uek-doc ol 9 | 0:5.15.0-210.163.7.el9uek | [ELSA-2024-12618](https://patchblox.com/security/data/fix/linux/elsa-2024-12618.md) | Sep 12, 2024 |
| Linux | kernel-uek-modules ol 8 | 0:5.15.0-210.163.7.el9uek | [ELSA-2024-12618](https://patchblox.com/security/data/fix/linux/elsa-2024-12618.md) | Sep 12, 2024 |
| Linux | kernel-uek-modules ol 9 | 0:5.15.0-210.163.7.el9uek | [ELSA-2024-12618](https://patchblox.com/security/data/fix/linux/elsa-2024-12618.md) | Sep 12, 2024 |
| Linux | kernel-uek-modules-extra ol 8 | 0:5.15.0-210.163.7.el9uek | [ELSA-2024-12618](https://patchblox.com/security/data/fix/linux/elsa-2024-12618.md) | Sep 12, 2024 |
| Linux | kernel-uek-modules-extra ol 9 | 0:5.15.0-210.163.7.el9uek | [ELSA-2024-12618](https://patchblox.com/security/data/fix/linux/elsa-2024-12618.md) | Sep 12, 2024 |
| Linux | kernel-zfcpdump opensuse-leap 15.6 | 6.4.0-150600.23.22.1 | [SUSE-SU-2024:3383-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3383-1.md) | Sep 23, 2024 |
| Linux | kernel-zfcpdump sles 15.6 | 6.4.0-150600.23.22.1 | [SUSE-SU-2024:3383-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3383-1.md) | Sep 23, 2024 |
| Linux | linux Debian 12.15 (bookworm) | 6.1.98-1 | [DEBIAN-CVE-2024-42161](https://patchblox.com/security/data/fix/linux/debian-cve-2024-42161.md) | Jul 30, 2024 |
| Linux | linux Debian 13.5 (trixie) | 6.9.9-1 | [DEBIAN-CVE-2024-42161](https://patchblox.com/security/data/fix/linux/debian-cve-2024-42161.md) | Jul 30, 2024 |
| Linux | linux Debian 14 | 6.9.9-1 | [DEBIAN-CVE-2024-42161](https://patchblox.com/security/data/fix/linux/debian-cve-2024-42161.md) | Jul 30, 2024 |
| Linux | perf amzn 2023 | 6.1.102-108.177.amzn2023 | [ALAS2023-2024-679](https://patchblox.com/security/data/fix/linux/alas2023-2024-679.md) | Aug 1, 2024 |
| Linux | perf-debuginfo amzn 2023 | 6.1.102-108.177.amzn2023 | [ALAS2023-2024-679](https://patchblox.com/security/data/fix/linux/alas2023-2024-679.md) | Aug 1, 2024 |
| Linux | python3-perf amzn 2023 | 6.1.102-108.177.amzn2023 | [ALAS2023-2024-679](https://patchblox.com/security/data/fix/linux/alas2023-2024-679.md) | Aug 1, 2024 |
| Linux | python3-perf-debuginfo amzn 2023 | 6.1.102-108.177.amzn2023 | [ALAS2023-2024-679](https://patchblox.com/security/data/fix/linux/alas2023-2024-679.md) | Aug 1, 2024 |

---

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