CVE-2025-40169
NoneCVSS
—
EPSS
0.2%
Published
Nov 12, 2025
CISA due date
—
The record
In the Linux kernel, the following vulnerability has been resolved: bpf: Reject negative offsets for ALU ops When verifying BPF programs, the check_alu_op() function validates instructions with ALU operations. The 'offset' field in these instructions is a signed 16-bit integer. The existing check 'insn->off > 1' was intended to ensure the offset is either 0, or 1 for BPF_MOD/BPF_DIV. However, because 'insn->off' is signed, this check incorrectly accepts all negative values (e.g., -1). This commit tightens the validation by changing the condition to '(insn->off != 0 && insn->off != 1)'. This ensures that any value other than the explicitly permitted 0 and 1 is rejected, hardening the verifier against malformed BPF programs.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| Linux | Kernel | 6.6.0 | 6.6.112 |
| SUSE:Linux Enterprise High Availability Extension 15 SP6 | kernel-default | 0 | 6.4.0-150600.23.81.3 |
| SUSE:Linux Enterprise Live Patching 15 SP6 | kernel-default | 0 | 6.4.0-150600.23.81.3 |
| SUSE:Linux Enterprise Live Patching 15 SP6 | kernel-livepatch-SLE15-SP6-RT_Update_18 | 0 | 1-150600.1.3.1 |
| SUSE:Linux Enterprise Live Patching 15 SP6 | kernel-livepatch-SLE15-SP6_Update_18 | 0 | 1-150600.13.3.3 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP6 | kernel-64kb | 0 | 6.4.0-150600.23.81.3 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP6 | kernel-default | 0 | 6.4.0-150600.23.81.3 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP6 | kernel-default-base | 0 | 6.4.0-150600.23.81.3.150600.12.36.3 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP6 | kernel-source | 0 | 6.4.0-150600.23.81.2 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP6 | kernel-zfcpdump | 0 | 6.4.0-150600.23.81.3 |
| SUSE:Linux Enterprise Module for Development Tools 15 SP6 | kernel-docs | 0 | 6.4.0-150600.23.81.1 |
| SUSE:Linux Enterprise Module for Development Tools 15 SP6 | kernel-obs-build | 0 | 6.4.0-150600.23.81.3 |
| SUSE:Linux Enterprise Module for Development Tools 15 SP6 | kernel-source | 0 | 6.4.0-150600.23.81.2 |
| SUSE:Linux Enterprise Module for Development Tools 15 SP6 | kernel-syms | 0 | 6.4.0-150600.23.81.1 |
| SUSE:Linux Enterprise Module for Legacy 15 SP6 | kernel-default | 0 | 6.4.0-150600.23.81.3 |
| SUSE:Linux Enterprise Module for Public Cloud 15 SP6 | kernel-azure | 0 | 6.4.0-150600.8.58.1 |
| SUSE:Linux Enterprise Module for Public Cloud 15 SP6 | kernel-source-azure | 0 | 6.4.0-150600.8.58.1 |
| SUSE:Linux Enterprise Module for Public Cloud 15 SP6 | kernel-syms-azure | 0 | 6.4.0-150600.8.58.1 |
| SUSE:Linux Enterprise Workstation Extension 15 SP6 | kernel-default | 0 | 6.4.0-150600.23.81.3 |
| SUSE:Real Time Module 15 SP6 | kernel-rt | 0 | 6.4.0-150600.10.61.1 |
| SUSE:Real Time Module 15 SP6 | kernel-rt_debug | 0 | 6.4.0-150600.10.61.1 |
| SUSE:Real Time Module 15 SP6 | kernel-source-rt | 0 | 6.4.0-150600.10.61.1 |
| SUSE:Real Time Module 15 SP6 | kernel-syms-rt | 0 | 6.4.0-150600.10.61.1 |
| openSUSE:Leap 15.6 | dtb-aarch64 | 0 | 6.4.0-150600.23.81.1 |
| openSUSE:Leap 15.6 | kernel-64kb | 0 | 6.4.0-150600.23.81.3 |
| openSUSE:Leap 15.6 | kernel-azure | 0 | 6.4.0-150600.8.58.1 |
| openSUSE:Leap 15.6 | kernel-debug | 0 | 6.4.0-150600.23.81.3 |
| openSUSE:Leap 15.6 | kernel-default | 0 | 6.4.0-150600.23.81.3 |
| openSUSE:Leap 15.6 | kernel-default-base | 0 | 6.4.0-150600.23.81.3.150600.12.36.3 |
| openSUSE:Leap 15.6 | kernel-docs | 0 | 6.4.0-150600.23.81.1 |
| openSUSE:Leap 15.6 | kernel-kvmsmall | 0 | 6.4.0-150600.23.81.3 |
| openSUSE:Leap 15.6 | kernel-obs-build | 0 | 6.4.0-150600.23.81.3 |
| openSUSE:Leap 15.6 | kernel-obs-qa | 0 | 6.4.0-150600.23.81.1 |
| openSUSE:Leap 15.6 | kernel-rt | 0 | 6.4.0-150600.10.61.1 |
| openSUSE:Leap 15.6 | kernel-rt_debug | 0 | 6.4.0-150600.10.61.1 |
| openSUSE:Leap 15.6 | kernel-source | 0 | 6.4.0-150600.23.81.2 |
| openSUSE:Leap 15.6 | kernel-source-azure | 0 | 6.4.0-150600.8.58.1 |
| openSUSE:Leap 15.6 | kernel-source-rt | 0 | 6.4.0-150600.10.61.1 |
| openSUSE:Leap 15.6 | kernel-syms | 0 | 6.4.0-150600.23.81.1 |
| openSUSE:Leap 15.6 | kernel-syms-azure | 0 | 6.4.0-150600.8.58.1 |
| openSUSE:Leap 15.6 | kernel-syms-rt | 0 | 6.4.0-150600.10.61.1 |
| openSUSE:Leap 15.6 | kernel-zfcpdump | 0 | 6.4.0-150600.23.81.3 |
| openSUSE:Leap 16.0 | dtb-aarch64 | 0 | 6.12.0-160000.8.1 |
| openSUSE:Leap 16.0 | kernel-64kb | 0 | 6.12.0-160000.8.1 |
| openSUSE:Leap 16.0 | kernel-default | 0 | 6.12.0-160000.8.1 |
| openSUSE:Leap 16.0 | kernel-default-base | 0 | 6.12.0-160000.8.1.160000.2.5 |
| openSUSE:Leap 16.0 | kernel-docs | 0 | 6.12.0-160000.8.1 |
| openSUSE:Leap 16.0 | kernel-kvmsmall | 0 | 6.12.0-160000.8.1 |
| openSUSE:Leap 16.0 | kernel-obs-build | 0 | 6.12.0-160000.8.1 |
| openSUSE:Leap 16.0 | kernel-obs-qa | 0 | 6.12.0-160000.8.1 |
| openSUSE:Leap 16.0 | kernel-rt | 0 | 6.12.0-160000.8.1 |
| openSUSE:Leap 16.0 | kernel-source | 0 | 6.12.0-160000.8.1 |
| openSUSE:Leap 16.0 | kernel-syms | 0 | 6.12.0-160000.8.1 |
| openSUSE:Leap 16.0 | kernel-zfcpdump | 0 | 6.12.0-160000.8.1 |
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