Integer Overflow or Wraparound Affecting kernel-source package, versions <6.4.0-150700.53.55.1


Severity

Recommended
0.0
medium
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.17% (7th percentile)

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  • Snyk IDSNYK-SLES157-KERNELSOURCE-17149772
  • published4 Jun 2026
  • disclosed3 Jun 2026

Introduced: 3 Jun 2026

NewCVE-2026-31412  (opens in a new tab)
CWE-190  (opens in a new tab)

How to fix?

Upgrade SLES:15.7 kernel-source to version 6.4.0-150700.53.55.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-source package and not the kernel-source package as distributed by SLES. See How to fix? for SLES:15.7 relevant fixed versions and status.

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

usb: gadget: f_mass_storage: Fix potential integer overflow in check_command_size_in_blocks()

The check_command_size_in_blocks() function calculates the data size in bytes by left shifting common-&gt;data_size_from_cmnd by the block size (common-&gt;curlun-&gt;blkbits). However, it does not validate whether this shift operation will cause an integer overflow.

Initially, the block size is set up in fsg_lun_open() , and the common-&gt;data_size_from_cmnd is set up in do_scsi_command(). During initialization, there is no integer overflow check for the interaction between two variables.

So if a malicious USB host sends a SCSI READ or WRITE command requesting a large amount of data (common-&gt;data_size_from_cmnd), the left shift operation can wrap around. This results in a truncated data size, which can bypass boundary checks and potentially lead to memory corruption or out-of-bounds accesses.

Fix this by using the check_shl_overflow() macro to safely perform the shift and catch any overflows.

CVSS Base Scores

version 3.1