In the Linux kernel, the following vulnerability has been resolved:
dax: make sure inodes are flushed before destroy cache
A bug can be triggered by following command
$ modprobe nd_pmem && modprobe -r nd_pmem
[ 10.060014] BUG dax_cache (Not tainted): Objects remaining in dax_cache on __kmem_cache_shutdown() [ 10.060938] Slab 0x0000000085b729ac objects=9 used=1 fp=0x000000004f5ae469 flags=0x200000000010200(slab|head|node) [ 10.062433] Call Trace: [ 10.062673] dump_stack_lvl+0x34/0x44 [ 10.062865] slab_err+0x90/0xd0 [ 10.063619] __kmem_cache_shutdown+0x13b/0x2f0 [ 10.063848] kmem_cache_destroy+0x4a/0x110 [ 10.064058] __x64_sys_delete_module+0x265/0x300
This is caused by dax_fs_exit() not flushing inodes before destroy cache. To fix this issue, call rcu_barrier() before destroy cache.
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 kernel-tools-debuginfoUpgrade kernelUpgrade kernel-debuginfoUpgrade kernel-tools-develUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-headersUpgrade python-perf-debuginfoUpgrade kernel-develUpgrade kernel-livepatch-5.10.112-108.499Upgrade perf-debuginfoUpgrade bpftool-debuginfoUpgrade kernel-debuginfo-common-aarch64Upgrade bpftoolUpgrade perfUpgrade kernel-toolsUpgrade python-perf | May 22, 2025 | Feb 26, 2025 |
| Debian | — | Upgrade linux | Feb 27, 2025 | Feb 27, 2025 |
| Huawei Euleros 2_0_sp12 | — | Upgrade kernelUpgrade bpftoolUpgrade python3-perfUpgrade kernel-tools-libsUpgrade kernel-abi-stablelistsUpgrade kernel-tools | Jun 11, 2025 | Feb 26, 2025 |
| Huawei Euleros 2_0_sp13 | — | Upgrade kernel-toolsUpgrade kernel-abi-stablelistsUpgrade kernelUpgrade bpftoolUpgrade kernel-tools-libsUpgrade python3-perf | Jun 11, 2025 | Feb 26, 2025 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Feb 26, 2025 |
| Ubuntu | — | Upgrade linux-fipsUpgrade linux-azure-5.15Upgrade linux-gkeUpgrade linux-gcpUpgrade linux-bluefieldUpgrade linux-intel-iotgUpgrade linux-ibm-5.4Upgrade linux-raspi-5.4Upgrade linux-kvmUpgrade linux-oracleUpgrade linux-gcp-fipsUpgrade linux-oracle-5.4Upgrade linux-gcp-5.4Upgrade linux-aws-5.4Upgrade linux-aws-fipsUpgrade linux-iotUpgrade linuxUpgrade linux-hwe-5.15Upgrade linux-raspiUpgrade linux-intel-iotg-5.15Upgrade linux-azure-fipsUpgrade linux-azureUpgrade linux-azure-5.4Upgrade linux-lowlatency-hwe-5.15Upgrade linux-lowlatencyUpgrade linux-ibmUpgrade linux-awsUpgrade linux-realtimeUpgrade linux-hwe-5.4 | Mar 3, 2025 | Feb 26, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | May 27, 2026 | Feb 26, 2025 |
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