---
id: CVE-2024-26973
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  fat: fix uninitialized field in nostale filehandles

  When fat_encode_fh_nostale() encodes file handle without a parent it
  stores only first 10 bytes of the file handle.…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  fat: fix uninitialized field in nostale filehandles

  When fat_encode_fh_nostale() encodes file handle without a parent it
  stores only first 10 bytes of the file handle.…
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-908
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 3.10, < 4.19.312'
  - 'linux_kernel >= 4.20, < 5.4.274'
  - 'linux_kernel >= 5.5, < 5.10.215'
  - 'linux_kernel >= 5.11, < 5.15.154'
  - 'linux_kernel >= 5.16, < 6.1.84'
  - 'linux_kernel >= 6.2, < 6.6.24'
  - 'linux_kernel >= 6.7, < 6.7.12'
  - 'linux_kernel >= 6.8, < 6.8.3'
  - debian_linux = 10.0
patched:
  - linux_kernel 6.8.3
published: '2024-05-01'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T01:17:34.730'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2024-26973'
references:
  - url: 'https://git.kernel.org/stable/c/03a7e3f2ba3ca25f1da1d3898709a08db14c1abb'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/74f852654b8b7866f15323685f1e178d3386c688'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/9840d1897e28f8733cc1e38f97e044f987dc0a63'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/a276c595c3a629170b0f052a3724f755d7c6adc6'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/b7fb63e807c6dadf7ecc1d43448c4f1711d7eeee'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/c8cc05de8e6b5612b6e9f92c385c1a064b0db375'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/cdd33d54e789d229d6d5007cbf3f53965ca1a5c6'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/f52d7663a10a1266a2d3871a6dd8fd111edc549f'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/fde2497d2bc3a063d8af88b258dbadc86bd7b57c'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/03a7e3f2ba3ca25f1da1d3898709a08db14c1abb'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/74f852654b8b7866f15323685f1e178d3386c688'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/9840d1897e28f8733cc1e38f97e044f987dc0a63'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/a276c595c3a629170b0f052a3724f755d7c6adc6'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/b7fb63e807c6dadf7ecc1d43448c4f1711d7eeee'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/c8cc05de8e6b5612b6e9f92c385c1a064b0db375'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/cdd33d54e789d229d6d5007cbf3f53965ca1a5c6'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/f52d7663a10a1266a2d3871a6dd8fd111edc549f'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/fde2497d2bc3a063d8af88b258dbadc86bd7b57c'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-265688.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-398330.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
tags:
  - nvd
  - cve.org
epss: 0.00255
epssPercentile: 0.1697
ingestedAt: '2026-10-15T03:30:12.666Z'
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2024-09-10T15:45:13.490208Z'
---

## Overview

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

fat: fix uninitialized field in nostale filehandles

When fat_encode_fh_nostale() encodes file handle without a parent it
stores only first 10 bytes of the file handle. However the length of the
file handle must be a multiple of 4 so the file handle is actually 12
bytes long and the last two bytes remain uninitialized. This is not
great at we potentially leak uninitialized information with the handle
to userspace. Properly initialize the full handle length.

## Affected

- `linux_kernel >= 3.10, < 4.19.312`
- `linux_kernel >= 4.20, < 5.4.274`
- `linux_kernel >= 5.5, < 5.10.215`
- `linux_kernel >= 5.11, < 5.15.154`
- `linux_kernel >= 5.16, < 6.1.84`
- `linux_kernel >= 6.2, < 6.6.24`
- `linux_kernel >= 6.7, < 6.7.12`
- `linux_kernel >= 6.8, < 6.8.3`
- `debian_linux = 10.0`

## Remediation

Upgrade past the affected range:

- `linux_kernel 6.8.3`