In the Linux kernel, the following vulnerability has been resolved:
fs/ntfs3: Fix memory leak if ntfs_read_mft failed
Label ATTR_ROOT in ntfs_read_mft() sets is_root = true and ni->ni_flags |= NI_FLAG_DIR, then next attr will goto label ATTR_ALLOC and alloc ni->dir.alloc_run. However two states are not always consistent and can make memory leak.
1) attr_name in ATTR_ROOT does not fit the condition it will set is_root = true but NI_FLAG_DIR is not set. 2) next attr_name in ATTR_ALLOC fits the condition and alloc ni->dir.alloc_run 3) in cleanup function ni_clear(), when NI_FLAG_DIR is set, it frees ni->dir.alloc_run, otherwise it frees ni->file.run 4) because NI_FLAG_DIR is not set in this case, ni->dir.alloc_run is leaked as kmemleak reported:
unreferenced object 0xffff888003bc5480 (size 64): backtrace: [<000000003d42e6b0>] __kmalloc_node+0x4e/0x1c0 [<00000000d8e19b8a>] kvmalloc_node+0x39/0x1f0 [<00000000fc3eb5b8>] run_add_entry+0x18a/0xa40 [ntfs3] [<0000000011c9f978>] run_unpack+0x75d/0x8e0 [ntfs3] [<00000000e7cf1819>] run_unpack_ex+0xbc/0x500 [ntfs3] [<00000000bbf0a43d>] ntfs_iget5+0xb25/0x2dd0 [ntfs3] [<00000000a6e50693>] ntfs_fill_super+0x218d/0x3580 [ntfs3] [<00000000b9170608>] get_tree_bdev+0x3fb/0x710 [<000000004833798a>] vfs_get_tree+0x8e/0x280 [<000000006e20b8e6>] path_mount+0xf3c/0x1930 [<000000007bf15a5f>] do_mount+0xf3/0x110 ...
Fix this by always setting is_root and NI_FLAG_DIR together.
CVSS Details
- CVSS 3.1 Base Score: 7.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade kernel-debuginfo-common-aarch64Upgrade kernel-tools-debuginfoUpgrade perfUpgrade bpftoolUpgrade kernel-develUpgrade kernel-debuginfoUpgrade kernel-tools-develUpgrade python-perf-debuginfoUpgrade kernel-headersUpgrade kernelUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-toolsUpgrade python-perfUpgrade bpftool-debuginfoUpgrade kernel-livepatch-5.15.117-72.142Upgrade perf-debuginfo | May 20, 2026 | May 20, 2026 |
| Debian | — | Upgrade linux | Dec 29, 2025 | Dec 29, 2025 |
| Ubuntu | — | Upgrade linux-nvidiaUpgrade linux-ibm-5.15Upgrade linux-oracleUpgrade linux-intel-iot-realtimeUpgrade linux-nvidia-tegra-igxUpgrade linux-gkeopUpgrade linux-gkeUpgrade linux-nvidia-tegraUpgrade linux-intel-iotgUpgrade linux-xilinx-zynqmpUpgrade linux-oracle-5.15Upgrade linux-riscv-5.15Upgrade linux-nvidia-tegra-5.15Upgrade linux-gcpUpgrade linux-bluefieldUpgrade linux-lowlatency-hwe-5.15Upgrade linux-hwe-5.15Upgrade linux-realtimeUpgrade linux-azure-5.15Upgrade linux-ibmUpgrade linux-raspiUpgrade linux-aws-5.15Upgrade linux-kvmUpgrade linux-awsUpgrade linux-azureUpgrade linuxUpgrade linux-intel-iotg-5.15Upgrade linux-lowlatencyUpgrade linux-gcp-5.15Upgrade linux-azure-fde | Jan 6, 2026 | Dec 24, 2025 |
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