# CVE-2024-43840: linux: In the Linux kernel, the following vulnerability has been resolved:  bpf, arm64: Fix trampoline for BPF_TRAMP_F_CALL_...

CVE-2024-43840 is fixed in 44 products on 1 platform, first by DEBIAN-CVE-2024-43840, released August 17, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2024-43840
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0023
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Aug 17, 2024

## Description

In the Linux kernel, the following vulnerability has been resolved:  bpf, arm64: Fix trampoline for BPF_TRAMP_F_CALL_ORIG  When BPF_TRAMP_F_CALL_ORIG is set, the trampoline calls __bpf_tramp_enter() and __bpf_tramp_exit() functions, passing them the struct bpf_tramp_image *im pointer as an argument in R0.  The trampoline generation code uses emit_addr_mov_i64() to emit instructions for moving the bpf_tramp_image address into R0, but emit_addr_mov_i64() assumes the address to be in the vmalloc() space and uses only 48 bits. Because bpf_tramp_image is allocated using kzalloc(), its address can use more than 48-bits, in this case the trampoline will pass an invalid address to __bpf_tramp_enter/exit() causing a kernel crash.  Fix this by using emit_a64_mov_i64() in place of emit_addr_mov_i64() as it can work with addresses that are greater than 48-bits.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | bpftool amzn 2023 | 6.1.140-154.222.amzn2023 | [ALAS2023-2025-1050](https://patchblox.com/security/data/fix/linux/alas2023-2025-1050.md) | Jun 26, 2025 |
| Linux | bpftool-debuginfo amzn 2023 | 6.1.140-154.222.amzn2023 | [ALAS2023-2025-1050](https://patchblox.com/security/data/fix/linux/alas2023-2025-1050.md) | Jun 26, 2025 |
| 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 | 6.1.140-154.222.amzn2023 | [ALAS2023-2025-1050](https://patchblox.com/security/data/fix/linux/alas2023-2025-1050.md) | Jun 26, 2025 |
| 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 | 6.1.140-154.222.amzn2023 | [ALAS2023-2025-1050](https://patchblox.com/security/data/fix/linux/alas2023-2025-1050.md) | Jun 26, 2025 |
| Linux | kernel-debuginfo-common-aarch64 amzn 2023 | 6.1.140-154.222.amzn2023 | [ALAS2023-2025-1050](https://patchblox.com/security/data/fix/linux/alas2023-2025-1050.md) | Jun 26, 2025 |
| Linux | kernel-debuginfo-common-x86_64 amzn 2023 | 6.1.140-154.222.amzn2023 | [ALAS2023-2025-1050](https://patchblox.com/security/data/fix/linux/alas2023-2025-1050.md) | Jun 26, 2025 |
| 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 | 6.1.140-154.222.amzn2023 | [ALAS2023-2025-1050](https://patchblox.com/security/data/fix/linux/alas2023-2025-1050.md) | Jun 26, 2025 |
| 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 | 6.1.140-154.222.amzn2023 | [ALAS2023-2025-1050](https://patchblox.com/security/data/fix/linux/alas2023-2025-1050.md) | Jun 26, 2025 |
| 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 | 6.1.140-154.222.amzn2023 | [ALAS2023-2025-1050](https://patchblox.com/security/data/fix/linux/alas2023-2025-1050.md) | Jun 26, 2025 |
| Linux | kernel-libbpf-debuginfo amzn 2023 | 6.1.140-154.222.amzn2023 | [ALAS2023-2025-1050](https://patchblox.com/security/data/fix/linux/alas2023-2025-1050.md) | Jun 26, 2025 |
| Linux | kernel-libbpf-devel amzn 2023 | 6.1.140-154.222.amzn2023 | [ALAS2023-2025-1050](https://patchblox.com/security/data/fix/linux/alas2023-2025-1050.md) | Jun 26, 2025 |
| Linux | kernel-libbpf-static amzn 2023 | 6.1.140-154.222.amzn2023 | [ALAS2023-2025-1050](https://patchblox.com/security/data/fix/linux/alas2023-2025-1050.md) | Jun 26, 2025 |
| Linux | kernel-livepatch-6.1.140-154.222 amzn 2023 | 1.0-0.amzn2023 | [ALAS2023-2025-1050](https://patchblox.com/security/data/fix/linux/alas2023-2025-1050.md) | Jun 26, 2025 |
| 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 | 6.1.140-154.222.amzn2023 | [ALAS2023-2025-1050](https://patchblox.com/security/data/fix/linux/alas2023-2025-1050.md) | Jun 26, 2025 |
| Linux | kernel-modules-extra-common amzn 2023 | 6.1.140-154.222.amzn2023 | [ALAS2023-2025-1050](https://patchblox.com/security/data/fix/linux/alas2023-2025-1050.md) | Jun 26, 2025 |
| 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 | 6.1.140-154.222.amzn2023 | [ALAS2023-2025-1050](https://patchblox.com/security/data/fix/linux/alas2023-2025-1050.md) | Jun 26, 2025 |
| Linux | kernel-tools-debuginfo amzn 2023 | 6.1.140-154.222.amzn2023 | [ALAS2023-2025-1050](https://patchblox.com/security/data/fix/linux/alas2023-2025-1050.md) | Jun 26, 2025 |
| Linux | kernel-tools-devel amzn 2023 | 6.1.140-154.222.amzn2023 | [ALAS2023-2025-1050](https://patchblox.com/security/data/fix/linux/alas2023-2025-1050.md) | Jun 26, 2025 |
| 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) | 6.1.140-1 | [DEBIAN-CVE-2024-43840](https://patchblox.com/security/data/fix/linux/debian-cve-2024-43840.md) | Aug 17, 2024 |
| Linux | linux Debian 13.5 (trixie) | 6.10.3-1 | [DEBIAN-CVE-2024-43840](https://patchblox.com/security/data/fix/linux/debian-cve-2024-43840.md) | Aug 17, 2024 |
| Linux | linux Debian 14 | 6.10.3-1 | [DEBIAN-CVE-2024-43840](https://patchblox.com/security/data/fix/linux/debian-cve-2024-43840.md) | Aug 17, 2024 |
| Linux | perf amzn 2023 | 6.1.140-154.222.amzn2023 | [ALAS2023-2025-1050](https://patchblox.com/security/data/fix/linux/alas2023-2025-1050.md) | Jun 26, 2025 |
| Linux | perf-debuginfo amzn 2023 | 6.1.140-154.222.amzn2023 | [ALAS2023-2025-1050](https://patchblox.com/security/data/fix/linux/alas2023-2025-1050.md) | Jun 26, 2025 |
| Linux | python3-perf amzn 2023 | 6.1.140-154.222.amzn2023 | [ALAS2023-2025-1050](https://patchblox.com/security/data/fix/linux/alas2023-2025-1050.md) | Jun 26, 2025 |
| Linux | python3-perf-debuginfo amzn 2023 | 6.1.140-154.222.amzn2023 | [ALAS2023-2025-1050](https://patchblox.com/security/data/fix/linux/alas2023-2025-1050.md) | Jun 26, 2025 |

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