---
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: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 838a10bd2ebfe11a60dd67687533a7cfc220cc86 <
    0e78cb242a57e481061fcb542fed4d51afba25c4
  - >-
    Linux >= 838a10bd2ebfe11a60dd67687533a7cfc220cc86 <
    d2eaea3599bcce659ce91862254dc91bcbdb6351
  - >-
    Linux >= 838a10bd2ebfe11a60dd67687533a7cfc220cc86 <
    77515ab12e4983e6416f8c35039a3f0c0822ac70
  - Linux b2fc4b17fc13810ef440fb323fad3981cd174985
  - Linux >= 6.12.6 < 6.13
  - Linux 6.13
published: '2026-09-25'
updated: '2026-09-25'
sourceUpdated: '2026-09-25T11:17:35.220'
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
tags:
  - nvd
  - cve.org
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.

## Remediation

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