CVE-2026-98135 Affecting linux-desktop-7.2 package, versions <7.2.7-r0


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.1% (1st percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-LINUXDESKTOP72-20974075
  • published16 Oct 2026
  • disclosed25 Sept 2026

Introduced: 25 Sep 2026

NewCVE-2026-98135  (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: reject invalid sectors_per_cluster in the boot sector

is_boot_sector_ntfs() checks the boot sector's sectors_per_cluster field with a range test that rejects 0x81..0xf3 but accepts 0 and other non-power-of-two counts. A zero value reaches parse_ntfs_boot_sector():

sectors_per_cluster_bits = ffs(sectors_per_cluster) - 1;
...
vol-&gt;cluster_size = vol-&gt;sector_size &lt;&lt; sectors_per_cluster_bits;

ffs(0) is 0, so sectors_per_cluster_bits becomes (unsigned)-1 and the shift is undefined:

UBSAN: shift-out-of-bounds in fs/ntfs/super.c:673:39 shift exponent 4294967295 is too large for 32-bit type 'int'

This change rejects any non-power-of-two value, since it feeds the aforementioned shift via ffs() - 1, which only yields the correct shift for a power of two.

CVSS Base Scores

version 3.1