CVE-2026-90048— fs/ntfs3: fix slab-out-of-bounds write in ni_create_attr_list()
Quick assessment
Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: fix slab-out-of-bounds write in ni_create_attr_list() ni_create_attr_list() allocates a fixed buffer of al_aligned(record_size) (== record_size) bytes and then walks every attribute
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I. Basic Information for CVE-2026-90048
Vulnerability Information
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Vulnerability Title
fs/ntfs3: fix slab-out-of-bounds write in ni_create_attr_list()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
fs/ntfs3: fix slab-out-of-bounds write in ni_create_attr_list()
ni_create_attr_list() allocates a fixed buffer of al_aligned(record_size)
(== record_size) bytes and then walks every attribute of the primary MFT
record, writing one ATTR_LIST_ENTRY per attribute and advancing the cursor
by le_size(name_len), with no check against the end of the buffer; the
total size is only computed after the loop.
A minimum-size resident attribute occupies SIZEOF_RESIDENT (0x18 = 24)
bytes on disk, but an unnamed attribute expands to le_size(0) (0x20 = 32)
bytes in the list. Because the number of attributes in a record is not
bounded (mi_enum_attr() accepts arbitrarily many equal-type, nameless
minimum-size attributes), a crafted record packed with such attributes
produces a list larger than record_size and overflows the heap buffer.
This is reachable from a crafted, loop-mounted NTFS image: opening the file
and adding an attribute (e.g. via setxattr) drives ntfs_set_ea() ->
ni_insert_resident() -> ni_insert_attr() -> ni_ins_attr_ext() ->
ni_create_attr_list().
BUG: KASAN: slab-out-of-bounds in ni_create_attr_list+0xc48/0x1058
Write of size 4 at addr ffff000008984c00 by task setfattr/345
ni_create_attr_list+0xc48/0x1058
ni_ins_attr_ext+0x510/0x7c0
ni_insert_attr+0x3f8/0x70c
ni_insert_resident+0xc8/0x3b0
ntfs_set_ea+0x66c/0xd28
ntfs_setxattr+0x4d8/0x5b0
__arm64_sys_setxattr+0xa4/0x124
Allocated by task 345:
ni_create_attr_list+0x188/0x1058
The buggy address belongs to the cache kmalloc-1k of size 1024
(the write lands at object+1024).
Size the buffer from the actual attributes instead of assuming a single
record_size is always enough.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Affected Products
II. Public POCs for CVE-2026-90048
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Other References for CVE-2026-90048 (5)
Same Patch Batch · Linux · 2026-09-16 · 276 CVEs total
| CVE-2026-89859 | scsi: qla2xxx: Zero dport diagnostics buffer to avoid info leak | |
| CVE-2026-89875 | media: ti: vpe: quiesce overflow recovery before freeing streams | |
| CVE-2026-89876 | media: tda18250: fix possible integer overflow | |
| CVE-2026-89874 | media: v4l2-async: avoid deleting unlinked ASC entry on link error | |
| CVE-2026-89872 | media: v4l2-fwnode: Fix fwnode leak in v4l2_fwnode_parse_link | |
| CVE-2026-89873 | media: v4l2-ctrls: validate HEVC EXT SPS RPS counts | |
| CVE-2026-89871 | media: video-i2c: fix kthread error pointer left in kthread_vid_cap on failure | |
| CVE-2026-89870 | media: zoran: Avoid freeing a registered video_device twice | |
| CVE-2026-89869 | media: qcom: iris: use disable_irq() during power-off | |
| CVE-2026-89868 | media: chips-media: wave5: Add timeout while stop_streaming | |
| CVE-2026-89867 | media: chips-media: wave5: Defer job_finish() only when a DEC_PIC was queued | |
| CVE-2026-89866 | media: chips-media: wave5: Resume device before setting EOS flag | |
| CVE-2026-89865 | scsi: qla2xxx: Zero SFP DMA buffer in FRU/I2C bsg handlers | |
| CVE-2026-89864 | scsi: qla2xxx: Bound i2c->length in I2C bsg handlers | |
| CVE-2026-89863 | scsi: qla2xxx: edif: Fix NULL pointer deref in RX SA delete check | |
| CVE-2026-89862 | scsi: qla2xxx: Fix BSG job leak on validate flash image error path | |
| CVE-2026-89861 | scsi: qla2xxx: Hold vport reference in qla24xx_report_id_acquisition() | |
| CVE-2026-89860 | scsi: qla2xxx: Initialize NVMe abort_work once at submission | |
| CVE-2026-89849 | scsi: qla2xxx: Reject non-SCSI SRB on status IOCB fast path | |
| CVE-2026-89847 | scsi: qla2xxx: Avoid double completion in async IOCB timeout |
Showing top 20 of 276 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
-
CVE-2026-90049
net: skbuff: don't skb_tx_error() the source skb in skb_zero -
CVE-2026-90047
drm/xe: Don't hand out the flat CCS storage as usable VRAM -
CVE-2026-90046
mm/page_alloc: don't spin_trylock() in NMI on UP -
CVE-2026-90044
usb: gadget: f_fs: Fix Use-After-Free in AIO error path -
CVE-2026-90045
USB: gadget: ffs: fix mm lifetime handling
Same vendor: Linux
-
CVE-2026-90049
net: skbuff: don't skb_tx_error() the source skb in skb_zero -
CVE-2026-90047
drm/xe: Don't hand out the flat CCS storage as usable VRAM -
CVE-2026-90046
mm/page_alloc: don't spin_trylock() in NMI on UP -
CVE-2026-90044
usb: gadget: f_fs: Fix Use-After-Free in AIO error path -
CVE-2026-90045
USB: gadget: ffs: fix mm lifetime handling
V. Comments for CVE-2026-90048
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