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In the Linux kernel, the following vulnerability has been resolved:
powerpc64/bpf: Limit 'ldbrx' to processors compliant with ISA v2.06
Johan reported the below crash with test_bpf on ppc64 e5500:
test_bpf: #296 ALU_END_FROM_LE 64: 0x0123456789abcdef -> 0x67452301 jited:1 Oops: Exception in kernel mode, sig: 4 [#1] BE PAGE_SIZE=4K SMP NR_CPUS=24 QEMU e500 Modules linked in: test_bpf(+) CPU: 0 PID: 76 Comm: insmod Not tainted 5.14.0-03771-g98c2059e008a-dirty #1 NIP: 8000000000061c3c LR: 80000000006dea64 CTR: 8000000000061c18 REGS: c0000000032d3420 TRAP: 0700 Not tainted (5.14.0-03771-g98c2059e008a-dirty) MSR: 0000000080089000 <EE,ME> CR: 88002822 XER: 20000000 IRQMASK: 0 <...> NIP [8000000000061c3c] 0x8000000000061c3c LR [80000000006dea64] .__run_one+0x104/0x17c [test_bpf] Call Trace: .__run_one+0x60/0x17c [test_bpf] (unreliable) .test_bpf_init+0x6a8/0xdc8 [test_bpf] .do_one_initcall+0x6c/0x28c .do_init_module+0x68/0x28c .load_module+0x2460/0x2abc .__do_sys_init_module+0x120/0x18c .system_call_exception+0x110/0x1b8 system_call_common+0xf0/0x210 --- interrupt: c00 at 0x101d0acc <...> ---[ end trace 47b2bf19090bb3d0 ]---
Illegal instruction
The illegal instruction turned out to be 'ldbrx' emitted for BPF_FROM_[L|B]E, which was only introduced in ISA v2.06. Guard use of the same and implement an alternative approach for older processors.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux | Jul 30, 2024 | Jun 20, 2024 |
| Huawei Euleros 2_0_sp12 | — | Upgrade kernel-tools-libsUpgrade bpftoolUpgrade kernelUpgrade kernel-toolsUpgrade python3-perfUpgrade kernel-abi-stablelists | Oct 9, 2024 | Jun 20, 2024 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Jun 20, 2024 |
| Suse | — | Upgrade reiserfs-kmp-rtUpgrade kernel-azure-extraUpgrade kernel-rt_debug-livepatch-develUpgrade kernel-devel-rtUpgrade kernel-rt_debugUpgrade kernel-syms-rtUpgrade reiserfs-kmp-azureUpgrade dlm-kmp-rtUpgrade kernel-rt_debug-vdsoUpgrade kernel-rt-extraUpgrade kselftests-kmp-rtUpgrade dlm-kmp-azureUpgrade kernel-azure-vdsoUpgrade kernel-rt-livepatch-develUpgrade kernel-syms-azureUpgrade kernel-azure-livepatch-develUpgrade ocfs2-kmp-azureUpgrade kernel-rt-optionalUpgrade kernel-rt-vdsoUpgrade cluster-md-kmp-azureUpgrade kernel-rt-develUpgrade kernel-rtUpgrade kernel-source-azureUpgrade kernel-rt_debug-develUpgrade kernel-azure-develUpgrade gfs2-kmp-azureUpgrade kernel-rt-livepatchUpgrade kernel-azure-optionalUpgrade kernel-azureUpgrade gfs2-kmp-rtUpgrade cluster-md-kmp-rtUpgrade kselftests-kmp-azureUpgrade kernel-devel-azureUpgrade kernel-source-rtUpgrade ocfs2-kmp-rt | Aug 9, 2024 | Jun 20, 2024 |
| Ubuntu | — | No solution exists | Jun 26, 2025 | Jun 20, 2024 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | May 27, 2026 | Jun 20, 2024 |
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