---
id: CVE-2026-98062
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  bpf: Mark signal tracepoint siginfo arguments as scalar

  The signal_generate and signal_deliver tracepoints declare their info
  argument as a struct kernel_siginfo point…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  bpf: Mark signal tracepoint siginfo arguments as scalar

  The signal_generate and signal_deliver tracepoints declare their info
  argument as a struct kernel_siginfo point…
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-476
  - CWE-843
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 6.12.6, < 6.13'
  - 'linux_kernel >= 6.13.1, < 6.18.53'
  - 'linux_kernel >= 6.19, < 7.2.7'
  - linux_kernel = 6.13
  - linux_kernel = 7.3
patched:
  - linux_kernel 7.2.7
published: '2026-09-25'
updated: '2026-10-02'
sourceUpdated: '2026-10-02T15:11:55.547'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-98062'
references:
  - url: 'https://git.kernel.org/stable/c/0e78cb242a57e481061fcb542fed4d51afba25c4'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/77515ab12e4983e6416f8c35039a3f0c0822ac70'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/d2eaea3599bcce659ce91862254dc91bcbdb6351'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98062.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-98062'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2541291'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-98062'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-98062'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98062.mbox
  - url: 'https://git.kernel.org/stable/c/05757377fa0447163d07c43a119f81abe1eef8dc'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
epss: 0.00155
epssPercentile: 0.04561
ingestedAt: '2026-09-25T11:06:38.842Z'
---

## Overview

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

bpf: Mark signal tracepoint siginfo arguments as scalar

The signal_generate and signal_deliver tracepoints declare their info
argument as a struct kernel_siginfo pointer. btf_ctx_access() therefore
treats it as a trusted pointer for tp_btf programs.

Signal delivery also uses SEND_SIG_NOINFO and SEND_SIG_PRIV as special
values for this argument. Those values are zero and one respectively,
and are not pointers. A tp_btf program can currently dereference either
value and fault the kernel. In particular, signal_generate can run from
timer interrupt context, turning the fault into a kernel panic.

Record both tracepoints in raw_tp_null_args[] and mark argument one as
a non-pointer. This preserves scalar access to the cookie while rejecting
direct and helper-mediated pointer use. Merely marking it nullable would
not suffice because SEND_SIG_PRIV is nonzero.

## Affected

- `linux_kernel >= 6.12.6, < 6.13`
- `linux_kernel >= 6.13.1, < 6.18.53`
- `linux_kernel >= 6.19, < 7.2.7`
- `linux_kernel = 6.13`
- `linux_kernel = 7.3`

## Remediation

Upgrade past the affected range:

- `linux_kernel 7.2.7`

## Vendor advisories

- **Red Hat VEX** · Low · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-10-17 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98062.json)