Out-of-bounds Read Affecting linux-desktop-7.2 package, versions <7.2.7-r0


Severity

Recommended
0.0
high
0
10

Snyk's Security Team recommends NVD's CVSS assessment. Learn more

Threat Intelligence

EPSS
0.11% (2nd percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-LINUXDESKTOP72-20974078
  • published16 Oct 2026
  • disclosed25 Sept 2026

Introduced: 25 Sep 2026

NewCVE-2026-98136  (opens in a new tab)
CWE-125  (opens in a new tab)

How to fix?

Upgrade Chainguard linux-desktop-7.2 to version 7.2.7-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream linux-desktop-7.2 package and not the linux-desktop-7.2 package as distributed by Chainguard. See How to fix? for Chainguard relevant fixed versions and status.

In the Linux kernel, the following vulnerability has been resolved:

ntfs: bound $AttrDef table walk to the loaded table size

ntfs_attr_find_in_attrdef() walks the in-memory $AttrDef table, but the loop condition bounds only the start of each entry, not the whole entry:

for (ad = vol-&gt;attrdef; (u8 *)ad - (u8 *)vol-&gt;attrdef &lt;
        vol-&gt;attrdef_size &amp;&amp; ad-&gt;type; ++ad)

struct attr_def is 160 bytes; the guard reads ad->type at offset 128 and the loop body reads further fields. vol->attrdef is kvzalloc(i_size), where i_size is the on-disk $AttrDef data size, checked in load_and_init_attrdef() only as 0 < i_size <= 0x7fffffff. A volume whose $AttrDef data size is smaller than one entry (e.g. 120 bytes) makes the read of ad->type run past the allocation. Creating a file reaches this through ntfs_attr_size_bounds_check() and reads out of bounds:

BUG: KASAN: slab-out-of-bounds in ntfs_attr_find_in_attrdef+0x66/0xa0 Read of size 4 at addr ffff888005833280 by task init/1 ntfs_attr_find_in_attrdef ntfs_attr_size_bounds_check ntfs_attr_can_be_non_resident ntfs_attr_add

Require the whole entry to lie within attrdef_size in the loop guard, and reject at mount a $AttrDef too small to hold one attr_def entry.

CVSS Base Scores

version 3.1