In the Linux kernel, the following vulnerability has been resolved:
ftrace: Fix null pointer dereference in ftrace_add_mod()
The @ftrace_mod is allocated by kzalloc(), so both the members {prev,next} of @ftrace_mode->list are NULL, it's not a valid state to call list_del(). If kstrdup() for @ftrace_mod->{func|module} fails, it goes to @out_free tag and calls free_ftrace_mod() to destroy @ftrace_mod, then list_del() will write prev->next and next->prev, where null pointer dereference happens.
BUG: kernel NULL pointer dereference, address: 0000000000000008 Oops: 0002 [#1] PREEMPT SMP NOPTI Call Trace: <TASK> ftrace_mod_callback+0x20d/0x220 ? do_filp_open+0xd9/0x140 ftrace_process_regex.isra.51+0xbf/0x130 ftrace_regex_write.isra.52.part.53+0x6e/0x90 vfs_write+0xee/0x3a0 ? __audit_filter_op+0xb1/0x100 ? auditd_test_task+0x38/0x50 ksys_write+0xa5/0xe0 do_syscall_64+0x3a/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd Kernel panic - not syncing: Fatal exception
So call INIT_LIST_HEAD() to initialize the list member to fix this issue.
CVSS Details
- CVSS 3.1 Base Score: 5.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade bpftool-debuginfoUpgrade kernel-toolsUpgrade python-perfUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-livepatch-5.15.86-53.137Upgrade bpftoolUpgrade kernel-debuginfoUpgrade perfUpgrade kernel-livepatch-5.10.157-139.675Upgrade kernelUpgrade kernel-develUpgrade kernel-headersUpgrade python-perf-debuginfoUpgrade kernel-tools-develUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-tools-debuginfoUpgrade perf-debuginfoUpgrade kernel-livepatch-4.14.301-224.520 | Jun 23, 2025 | May 1, 2025 |
| Debian | — | Upgrade linux | May 5, 2025 | May 1, 2025 |
| Huawei Euleros 2_0_sp13 | — | Upgrade kernelUpgrade kernel-tools-libsUpgrade python3-perfUpgrade kernel-abi-stablelistsUpgrade kernel-toolsUpgrade bpftool | Aug 13, 2025 | Aug 9, 2025 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | May 1, 2025 |
| Ubuntu | — | Upgrade linux-gcpUpgrade linux-azure-fipsUpgrade linux-intel-iot-realtimeUpgrade linux-ibm-5.4Upgrade linux-aws-5.15Upgrade linux-gkeUpgrade linux-nvidia-tegra-5.15Upgrade linux-oracle-5.4Upgrade linuxUpgrade linux-gcp-5.4Upgrade linux-awsUpgrade linux-aws-5.4Upgrade linux-kvmUpgrade linux-bluefieldUpgrade linux-riscv-5.15Upgrade linux-gkeopUpgrade linux-iotUpgrade linux-azure-5.15Upgrade linux-gcp-fipsUpgrade linux-azureUpgrade linux-aws-hweUpgrade linux-fipsUpgrade linux-raspiUpgrade linux-gcp-4.15Upgrade linux-azure-5.4Upgrade linux-xilinx-zynqmpUpgrade linux-intel-iotgUpgrade linux-hwe-5.4Upgrade linux-azure-4.15Upgrade linux-oracle-5.15Upgrade linux-aws-fipsUpgrade linux-ibmUpgrade linux-nvidiaUpgrade linux-lowlatencyUpgrade linux-realtimeUpgrade linux-hwe-5.15Upgrade linux-gcp-5.15Upgrade linux-hweUpgrade linux-lowlatency-hwe-5.15Upgrade linux-intel-iotg-5.15Upgrade linux-oracleUpgrade linux-raspi-5.4 | May 6, 2025 | May 1, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | May 27, 2026 | May 1, 2025 |
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