In the Linux kernel, the following vulnerability has been resolved:
bnxt_en: Fix RX consumer index logic in the error path.
In bnxt_rx_pkt(), the RX buffers are expected to complete in order. If the RX consumer index indicates an out of order buffer completion, it means we are hitting a hardware bug and the driver will abort all remaining RX packets and reset the RX ring. The RX consumer index that we pass to bnxt_discard_rx() is not correct. We should be passing the current index (tmp_raw_cons) instead of the old index (raw_cons). This bug can cause us to be at the wrong index when trying to abort the next RX packet. It can crash like this:
#0 [ffff9bbcdf5c39a8] machine_kexec at ffffffff9b05e007 #1 [ffff9bbcdf5c3a00] __crash_kexec at ffffffff9b111232 #2 [ffff9bbcdf5c3ad0] panic at ffffffff9b07d61e #3 [ffff9bbcdf5c3b50] oops_end at ffffffff9b030978 #4 [ffff9bbcdf5c3b78] no_context at ffffffff9b06aaf0 #5 [ffff9bbcdf5c3bd8] __bad_area_nosemaphore at ffffffff9b06ae2e #6 [ffff9bbcdf5c3c28] bad_area_nosemaphore at ffffffff9b06af24 #7 [ffff9bbcdf5c3c38] __do_page_fault at ffffffff9b06b67e #8 [ffff9bbcdf5c3cb0] do_page_fault at ffffffff9b06bb12 #9 [ffff9bbcdf5c3ce0] page_fault at ffffffff9bc015c5 [exception RIP: bnxt_rx_pkt+237] RIP: ffffffffc0259cdd RSP: ffff9bbcdf5c3d98 RFLAGS: 00010213 RAX: 000000005dd8097f RBX: ffff9ba4cb11b7e0 RCX: ffffa923cf6e9000 RDX: 0000000000000fff RSI: 0000000000000627 RDI: 0000000000001000 RBP: ffff9bbcdf5c3e60 R8: 0000000000420003 R9: 000000000000020d R10: ffffa923cf6ec138 R11: ffff9bbcdf5c3e83 R12: ffff9ba4d6f928c0 R13: ffff9ba4cac28080 R14: ffff9ba4cb11b7f0 R15: ffff9ba4d5a30000 ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade kernel-debuginfoUpgrade bpftool-debuginfoUpgrade kernel-tools-develUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-headersUpgrade kernel-develUpgrade kernel-tools-debuginfoUpgrade bpftoolUpgrade perfUpgrade kernel-toolsUpgrade perf-debuginfoUpgrade python-perfUpgrade kernel-debuginfo-common-x86_64Upgrade kernelUpgrade python-perf-debuginfo | May 28, 2024 | Feb 28, 2024 |
| Debian | — | Upgrade linux | Jul 30, 2024 | Feb 28, 2024 |
| Huawei Euleros 2_0_sp10 | — | Upgrade kernel-toolsUpgrade kernel-abi-stablelistsUpgrade python3-perfUpgrade kernel-tools-libsUpgrade kernel | May 13, 2024 | Feb 28, 2024 |
| Huawei Euleros 2_0_sp8 | — | Upgrade kernelUpgrade kernel-headersUpgrade python3-perfUpgrade perfUpgrade kernel-toolsUpgrade kernel-develUpgrade kernel-tools-libsUpgrade bpftoolUpgrade python-perf | Jul 23, 2024 | Feb 28, 2024 |
| Huawei Euleros 2_0_sp9 | — | Upgrade python3-perfUpgrade kernelUpgrade kernel-toolsUpgrade kernel-tools-libs | Jul 17, 2024 | Feb 28, 2024 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Feb 28, 2024 |
| Suse | — | Upgrade kernel-azure-baseUpgrade kernel-64kbUpgrade kernel-default-extraUpgrade kernel-default-manUpgrade kernel-64kb-develUpgrade kernel-source-azureUpgrade kernel-macrosUpgrade kernel-devel-azureUpgrade kernel-symsUpgrade kernel-default-develUpgrade kernel-default-baseUpgrade kernel-sourceUpgrade reiserfs-kmp-defaultUpgrade kernel-zfcpdumpUpgrade kernel-docsUpgrade kernel-azure-develUpgrade kernel-preemptUpgrade kernel-azureUpgrade kernel-obs-buildUpgrade kernel-defaultUpgrade kernel-syms-azureUpgrade kernel-develUpgrade kernel-preempt-devel | Aug 9, 2024 | Feb 28, 2024 |
| Ubuntu | — | Upgrade linux-aws-5.4Upgrade linux-oracle-5.4Upgrade linux-bluefieldUpgrade linux-fipsUpgrade linux-raspiUpgrade linuxUpgrade linux-gcp-fipsUpgrade linux-gkeopUpgrade linux-hwe-5.4Upgrade linux-kvmUpgrade linux-gcpUpgrade linux-awsUpgrade linux-azure-fipsUpgrade linux-gcp-5.4Upgrade linux-aws-fipsUpgrade linux-azureUpgrade linux-azure-5.4Upgrade linux-oracleUpgrade linux-raspi-5.4 | Nov 19, 2024 | Feb 28, 2024 |
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