In the Linux kernel, the following vulnerability has been resolved:
ext4: publish jinode after initialization
ext4_inode_attach_jinode() publishes ei->jinode to concurrent users. It used to set ei->jinode before jbd2_journal_init_jbd_inode(), allowing a reader to observe a non-NULL jinode with i_vfs_inode still unset.
The fast commit flush path can then pass this jinode to jbd2_wait_inode_data(), which dereferences i_vfs_inode->i_mapping and may crash.
Below is the crash I observe: ``` BUG: unable to handle page fault for address: 000000010beb47f4 PGD 110e51067 P4D 110e51067 PUD 0 Oops: Oops: 0000 [#1] SMP NOPTI CPU: 1 UID: 0 PID: 4850 Comm: fc_fsync_bench_ Not tainted 6.18.0-00764-g795a690c06a5 #1 PREEMPT(voluntary) Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Arch Linux 1.17.0-2-2 04/01/2014 RIP: 0010:xas_find_marked+0x3d/0x2e0 Code: e0 03 48 83 f8 02 0f 84 f0 01 00 00 48 8b 47 08 48 89 c3 48 39 c6 0f 82 fd 01 00 00 48 85 c9 74 3d 48 83 f9 03 77 63 4c 8b 0f <49> 8b 71 08 48 c7 47 18 00 00 00 00 48 89 f1 83 e1 03 48 83 f9 02 RSP: 0018:ffffbbee806e7bf0 EFLAGS: 00010246 RAX: 000000000010beb4 RBX: 000000000010beb4 RCX: 0000000000000003 RDX: 0000000000000001 RSI: 0000002000300000 RDI: ffffbbee806e7c10 RBP: 0000000000000001 R08: 0000002000300000 R09: 000000010beb47ec R10: ffff9ea494590090 R11: 0000000000000000 R12: 0000002000300000 R13: ffffbbee806e7c90 R14: ffff9ea494513788 R15: ffffbbee806e7c88 FS: 00007fc2f9e3e6c0(0000) GS:ffff9ea6b1444000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000010beb47f4 CR3: 0000000119ac5000 CR4: 0000000000750ef0 PKRU: 55555554 Call Trace: <TASK> filemap_get_folios_tag+0x87/0x2a0 __filemap_fdatawait_range+0x5f/0xd0 ? srso_alias_return_thunk+0x5/0xfbef5 ? __schedule+0x3e7/0x10c0 ? srso_alias_return_thunk+0x5/0xfbef5 ? srso_alias_return_thunk+0x5/0xfbef5 ? srso_alias_return_thunk+0x5/0xfbef5 ? preempt_count_sub+0x5f/0x80 ? srso_alias_return_thunk+0x5/0xfbef5 ? cap_safe_nice+0x37/0x70 ? srso_alias_return_thunk+0x5/0xfbef5 ? preempt_count_sub+0x5f/0x80 ? srso_alias_return_thunk+0x5/0xfbef5 filemap_fdatawait_range_keep_errors+0x12/0x40 ext4_fc_commit+0x697/0x8b0 ? ext4_file_write_iter+0x64b/0x950 ? srso_alias_return_thunk+0x5/0xfbef5 ? preempt_count_sub+0x5f/0x80 ? srso_alias_return_thunk+0x5/0xfbef5 ? vfs_write+0x356/0x480 ? srso_alias_return_thunk+0x5/0xfbef5 ? preempt_count_sub+0x5f/0x80 ext4_sync_file+0xf7/0x370 do_fsync+0x3b/0x80 ? syscall_trace_enter+0x108/0x1d0 __x64_sys_fdatasync+0x16/0x20 do_syscall_64+0x62/0x2c0 entry_SYSCALL_64_after_hwframe+0x76/0x7e ... ```
Fix this by initializing the jbd2_inode first. Use smp_wmb() and WRITE_ONCE() to publish ei->jinode after initialization. Readers use READ_ONCE() to fetch the pointer.
CVSS Details
- CVSS 3.1 Base Score: 8.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade kernel-headersUpgrade kernel-debuginfoUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-tools-debuginfoUpgrade python-perf-debuginfoUpgrade kernel-develUpgrade bpftool-debuginfoUpgrade python-perfUpgrade perfUpgrade perf-debuginfoUpgrade kernel-livepatch-5.15.204-143.230Upgrade kernel-livepatch-5.10.253-252.1015Upgrade bpftoolUpgrade kernelUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-toolsUpgrade kernel-tools-devel | May 20, 2026 | May 20, 2026 |
| Debian | — | Upgrade linux-6.1Upgrade linux | May 3, 2026 | May 3, 2026 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Apr 22, 2026 |
| Ubuntu | — | Upgrade linux-image-laptop-23.10Upgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-nvidia-tegra-rt-6.8Upgrade linux-image-generic-64k-5.15Upgrade linux-image-gkeop-5.15Upgrade linux-image-aws-6.8Upgrade linux-image-generic-lpae-hwe-20.04Upgrade linux-image-oem-20.04bUpgrade linux-image-raspi-5.15Upgrade linux-image-azureUpgrade linux-image-azure-5.15Upgrade linux-image-5.15.0-184-lowlatencyUpgrade linux-image-oem-20.04dUpgrade linux-image-intel-iot-realtimeUpgrade linux-image-virtual-hwe-20.04Upgrade linux-image-5.15.0-1106-raspiUpgrade linux-image-oracle-64k-lts-24.04Upgrade linux-image-gcp-64k-6.8Upgrade linux-image-gcp-fipsUpgrade linux-image-aws-64kUpgrade linux-image-oracle-64k-6.8Upgrade linux-image-6.8.0-1061-aws-fipsUpgrade linux-image-6.8.0-1061-ibmUpgrade linux-image-6.8.0-1061-aws-64kUpgrade linux-image-azure-fde-lts-22.04Upgrade linux-image-5.15.0-1053-nvidia-tegra-igx-rtUpgrade linux-image-5.15.0-1064-nvidia-tegraUpgrade linux-image-virtual-hwe-22.04Upgrade linux-image-5.15.0-1075-xilinx-zynqmpUpgrade linux-image-kvm-5.15Upgrade linux-image-oracle-5.15Upgrade linux-image-raspiUpgrade linux-image-5.15.0-186-genericUpgrade linux-image-5.15.0-1064-nvidia-tegra-rtUpgrade linux-image-5.15.0-1112-aws-64kUpgrade linux-image-6.8.0-1059-nvidia-lowlatency-64kUpgrade linux-image-gcp-lts-24.04Upgrade linux-image-6.8.0-1059-gke-64kUpgrade linux-image-generic-hwe-22.04Upgrade linux-image-realtime-5.15Upgrade linux-image-5.15.0-1108-gkeUpgrade linux-image-6.8.0-136-generic-64kUpgrade linux-image-xilinx-6.8Upgrade linux-image-nvidia-tegra-igx-5.15Upgrade linux-image-generic-64kUpgrade linux-image-generic-hwe-20.04Upgrade linux-image-gke-64k-6.8Upgrade linux-image-raspi-6.8Upgrade linux-image-oem-22.04bUpgrade linux-image-intel-iot-realtime-5.15Upgrade linux-image-6.8.0-136-genericUpgrade linux-image-aws-fips-6.8Upgrade linux-image-gcp-fips-5.15Upgrade linux-image-gcp-fips-6.8Upgrade linux-image-azure-6.8Upgrade linux-image-generic-6.8Upgrade linux-image-raspi-realtimeUpgrade linux-image-6.8.0-1062-azure-fdeUpgrade linux-image-intelUpgrade linux-image-5.15.0-1117-azure-fipsUpgrade linux-image-oem-20.04cUpgrade linux-image-6.8.0-1064-gcpUpgrade linux-image-realtime-6.8.1Upgrade linux-image-azure-lts-22.04Upgrade linux-image-oem-22.04cUpgrade linux-image-nvidia-64kUpgrade linux-image-virtual-6.8Upgrade linux-image-5.15.0-1104-intel-iot-realtimeUpgrade linux-image-xilinxUpgrade linux-image-6.8.0-1059-nvidiaUpgrade linux-image-gcpUpgrade linux-image-5.15.0-186-generic-lpaeUpgrade linux-image-azure-fdeUpgrade linux-image-6.8.0-1058-oracleUpgrade linux-image-gkeopUpgrade linux-image-6.8.0-1030-nvidia-tegra-rtUpgrade linux-image-oem-22.04dUpgrade linux-image-realtime-hwe-22.04Upgrade linux-image-azure-fips-6.8Upgrade linux-image-5.15.0-186-fipsUpgrade linux-image-nvidia-5.15Upgrade linux-image-oracle-64kUpgrade linux-image-kvmUpgrade linux-image-virtual-5.15Upgrade linux-image-aws-fips-5.15Upgrade linux-image-oracle-6.8Upgrade linux-image-intel-iotgUpgrade linux-image-nvidia-6.8Upgrade linux-image-nvidia-tegraUpgrade linux-image-6.8.0-136-lowlatency-64kUpgrade linux-image-6.8.0-1063-azureUpgrade linux-image-gcp-64kUpgrade linux-image-nvidia-tegra-rt-5.15Upgrade linux-image-fips-6.8Upgrade linux-image-gke-6.8Upgrade linux-image-5.15.0-186-generic-64kUpgrade linux-image-6.8.0-1030-nvidia-tegraUpgrade linux-image-aws-lts-24.04Upgrade linux-image-gke-64kUpgrade linux-image-ibm-lts-24.04Upgrade linux-image-6.8.0-1063-azure-fipsUpgrade linux-image-5.15.0-1107-nvidiaUpgrade linux-image-5.15.0-1109-oracleUpgrade linux-image-aws-64k-6.8Upgrade linux-image-oem-22.04Upgrade linux-image-oem-20.04Upgrade linux-image-azure-fde-5.15Upgrade linux-image-gkeUpgrade linux-image-nvidia-tegra-igx-rtUpgrade linux-image-lowlatency-64k-6.8Upgrade linux-image-azure-fipsUpgrade linux-image-5.15.0-1117-azureUpgrade linux-image-5.15.0-1112-gcp-fipsUpgrade linux-image-raspi-nolpaeUpgrade linux-image-oracleUpgrade linux-image-nvidia-tegra-rtUpgrade linux-image-nvidia-tegra-igx-rt-5.15Upgrade linux-image-nvidia-hwe-22.04Upgrade linux-image-fipsUpgrade linux-image-gke-5.15Upgrade linux-image-5.15.0-1106-ibmUpgrade linux-image-5.15.0-1112-gcpUpgrade linux-image-generic-64k-6.8Upgrade linux-image-generic-64k-hwe-20.04Upgrade linux-image-oracle-lts-22.04Upgrade linux-image-nvidia-lowlatency-64k-6.8Upgrade linux-image-ibmUpgrade linux-image-gcp-lts-22.04Upgrade linux-image-5.15.0-1112-awsUpgrade linux-image-nvidia-lowlatencyUpgrade linux-image-gcp-5.15Upgrade linux-image-gcp-64k-lts-24.04Upgrade linux-image-lowlatency-5.15Upgrade linux-image-6.8.0-136-lowlatencyUpgrade linux-image-5.15.0-1107-nvidia-lowlatencyUpgrade linux-image-generic-lpae-5.15Upgrade linux-image-azure-fde-lts-24.04Upgrade linux-image-lowlatencyUpgrade linux-image-5.15.0-1112-aws-fipsUpgrade linux-image-5.15.0-1107-intel-iotgUpgrade linux-image-nvidia-tegra-6.8Upgrade linux-image-nvidia-64k-6.8Upgrade linux-image-lowlatency-hwe-20.04Upgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-xilinx-zynqmpUpgrade linux-image-aws-64k-5.15Upgrade linux-image-6.8.0-136-fipsUpgrade linux-image-5.15.0-1095-gkeopUpgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-azure-fips-5.15Upgrade linux-image-5.15.0-1104-kvmUpgrade linux-image-nvidia-64k-hwe-22.04Upgrade linux-image-lowlatency-6.8Upgrade linux-image-6.8.0-1059-nvidia-lowlatencyUpgrade linux-image-generic-5.15Upgrade linux-image-gkeop-6.8Upgrade linux-image-virtualUpgrade linux-image-5.15.0-1117-azure-fdeUpgrade linux-image-5.15.0-1111-realtimeUpgrade linux-image-generic-lpaeUpgrade linux-image-6.8.0-1033-xilinxUpgrade linux-image-nvidia-lowlatency-6.8Upgrade linux-image-lowlatency-64k-hwe-20.04Upgrade linux-image-nvidia-tegra-igxUpgrade linux-image-lowlatency-64kUpgrade linux-image-azure-fde-6.8Upgrade linux-image-azure-lts-24.04Upgrade linux-image-ibm-classicUpgrade linux-image-ibm-5.15Upgrade linux-image-aws-5.15Upgrade linux-image-6.8.0-1064-gcp-fipsUpgrade linux-image-6.8.0-1061-awsUpgrade linux-image-nvidia-lowlatency-5.15Upgrade linux-image-aws-fipsUpgrade linux-image-6.8.0-1059-gkeUpgrade linux-image-6.8.0-1046-gkeopUpgrade linux-image-genericUpgrade linux-image-xilinx-zynqmp-5.15Upgrade linux-image-realtimeUpgrade linux-image-oracle-lts-24.04Upgrade linux-image-fips-5.15Upgrade linux-image-azure-cvmUpgrade linux-image-aws-lts-22.04Upgrade linux-image-6.8.0-2050-raspi-realtimeUpgrade linux-image-6.8.0-1059-nvidia-64kUpgrade linux-image-5.15.0-184-lowlatency-64kUpgrade linux-image-5.15.0-1053-nvidia-tegra-igxUpgrade linux-image-oem-22.04aUpgrade linux-image-nvidia-lowlatency-64kUpgrade linux-image-aws-64k-lts-22.04Upgrade linux-image-awsUpgrade linux-image-6.8.0-1058-oracle-64kUpgrade linux-image-nvidia-tegra-5.15Upgrade linux-image-nvidiaUpgrade linux-image-gcp-6.8Upgrade linux-image-raspi-realtime-6.8Upgrade linux-image-lowlatency-64k-5.15Upgrade linux-image-intel-iotg-5.15Upgrade linux-image-ibm-6.8Upgrade linux-image-aws-64k-lts-24.04Upgrade linux-image-6.8.1-1056-realtimeUpgrade linux-image-6.8.0-1064-gcp-64kUpgrade linux-image-6.8.0-1061-raspi | Jul 20, 2026 | Apr 22, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | May 27, 2026 | Apr 22, 2026 |
Prioritise with Active Threat Intelligence
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub