---
id: CVE-2026-64299
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  tracing: Prevent out-of-bounds read in glob matching

  String event fields are not necessarily NUL-terminated, so the filter
  predicate functions (filter_pred_string(), f…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  tracing: Prevent out-of-bounds read in glob matching

  String event fields are not necessarily NUL-terminated, so the filter
  predicate functions (filter_pred_string(), f…
severity: high
cvss: 7.1
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H'
published: '2026-07-25'
updated: '2026-07-27'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-64299'
references:
  - url: 'https://git.kernel.org/stable/c/0a6070839b1ef276d5b05bedfb787743e140fb17'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/265f3a690f6c7d69ef7d2ca50b04b4853a211df3'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/2dad64a97e1df47f5d9ccb17fa319aa348617226'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/35ae19764eabfe9c29029d3b5713c86e6855acdf'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/56d4c9ab84714eebb285a2fee68aaedf81e3ef15'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/e5d5f3bd053a5f14787526c9f0f55ef900d43ac6'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/ebb55902856973906c8bb339a3a34824ed4a5086'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/ee5b8888d3248618251fb69a2fad92afcb81557e'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
epss: 0.00164
epssPercentile: 0.06033
ingestedAt: '2026-07-27T06:16:50.220Z'
---

## Overview

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

tracing: Prevent out-of-bounds read in glob matching

String event fields are not necessarily NUL-terminated, so the filter
predicate functions (filter_pred_string(), filter_pred_strloc() and
filter_pred_strrelloc()) pass the field length to the regex match
callbacks, and the length-aware matchers honour it.

regex_match_glob() was the exception: it ignored the length and called
glob_match(), which scans the string until it hits a NUL byte. Some
string fields are not NUL-terminated. One example is the dynamic char
array of the xfs_* namespace tracepoints, which is copied without a
trailing NUL. For such a field, glob matching reads past the end of
the event field, causing a KASAN slab-out-of-bounds read in
glob_match(), reached via regex_match_glob() and filter_match_preds()
from the xfs_lookup tracepoint.

Add a length-bounded glob_match_len() and use it from regex_match_glob()
so glob matching always stops at the field boundary. The matching loop
is factored into a shared helper so glob_match() keeps its behaviour.

## Remediation

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