---
id: CVE-2026-99219
title: 'ftrace: Initialize modname and offset in print_rec()'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ftrace: Initialize modname and offset in print_rec()

  print_rec() leaves 'modname' and 'offset' uninitialized and
  kallsyms_lookup() only sets them on success. When the …
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= b39181f7c6907dc66ff937b74758671fa6ba430c <
    753d5cba113a52cb155428f4ea93a4b0148c4bf1
  - >-
    Linux >= b39181f7c6907dc66ff937b74758671fa6ba430c <
    0e5ff07be834abaf4280e1dca7f9591e339d0960
  - >-
    Linux >= b39181f7c6907dc66ff937b74758671fa6ba430c <
    e2e6fb972bfec4a0551bc7c185bdb17f78f94997
  - >-
    Linux >= b39181f7c6907dc66ff937b74758671fa6ba430c <
    8932e5a4df110a25578728526bb5a3dbc849d8a2
  - >-
    Linux >= b39181f7c6907dc66ff937b74758671fa6ba430c <
    7271c064dd60d4456c5b90da757acd9420d06697
  - >-
    Linux >= b39181f7c6907dc66ff937b74758671fa6ba430c <
    d97dba9ff13987d1fc415408557a54adde980311
  - >-
    Linux >= b39181f7c6907dc66ff937b74758671fa6ba430c <
    e1f339ff3b83857b93baf8b88186275a413d445e
  - Linux 5.19
published: '2026-11-02'
updated: '2026-11-03'
sourceUpdated: '2026-11-03T19:12:54.203Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-99219'
references:
  - url: 'https://git.kernel.org/stable/c/753d5cba113a52cb155428f4ea93a4b0148c4bf1'
  - url: 'https://git.kernel.org/stable/c/0e5ff07be834abaf4280e1dca7f9591e339d0960'
  - url: 'https://git.kernel.org/stable/c/e2e6fb972bfec4a0551bc7c185bdb17f78f94997'
  - url: 'https://git.kernel.org/stable/c/8932e5a4df110a25578728526bb5a3dbc849d8a2'
  - url: 'https://git.kernel.org/stable/c/7271c064dd60d4456c5b90da757acd9420d06697'
  - url: 'https://git.kernel.org/stable/c/d97dba9ff13987d1fc415408557a54adde980311'
  - url: 'https://git.kernel.org/stable/c/e1f339ff3b83857b93baf8b88186275a413d445e'
tags:
  - cve.org
epss: 0.00173
epssPercentile: 0.0677
ingestedAt: '2026-11-05T20:33:06.380Z'
---

## Overview

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

ftrace: Initialize modname and offset in print_rec()

print_rec() leaves 'modname' and 'offset' uninitialized and
kallsyms_lookup() only sets them on success. When the lookup fails like
when a module is being loaded or unloaded, 'modname' holds a garbage
value, passes the 'if (modname)' check, and is dereferenced by
seq_printf().

  Oops: general protection fault
  RIP: 0010:string+0x48/0xe0
  Call Trace:
   vsnprintf+0x1f5/0x650
   seq_printf+0x8e/0xb0
   print_rec+0x6c/0xc0
   t_show+0x4c/0x440
   seq_read_iter+0x119/0x480

This can be triggered by reading available_filter_functions while a
module is being loaded or unloaded.

Initialize both variables so a failed lookup skips the module name.

## Affected

- `Linux >= b39181f7c6907dc66ff937b74758671fa6ba430c < 753d5cba113a52cb155428f4ea93a4b0148c4bf1`
- `Linux >= b39181f7c6907dc66ff937b74758671fa6ba430c < 0e5ff07be834abaf4280e1dca7f9591e339d0960`
- `Linux >= b39181f7c6907dc66ff937b74758671fa6ba430c < e2e6fb972bfec4a0551bc7c185bdb17f78f94997`
- `Linux >= b39181f7c6907dc66ff937b74758671fa6ba430c < 8932e5a4df110a25578728526bb5a3dbc849d8a2`
- `Linux >= b39181f7c6907dc66ff937b74758671fa6ba430c < 7271c064dd60d4456c5b90da757acd9420d06697`
- `Linux >= b39181f7c6907dc66ff937b74758671fa6ba430c < d97dba9ff13987d1fc415408557a54adde980311`
- `Linux >= b39181f7c6907dc66ff937b74758671fa6ba430c < e1f339ff3b83857b93baf8b88186275a413d445e`
- `Linux 5.19`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.