Reference page — cumulative record through Saturday, October 3, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-98062

CVE-2026-98062MEDIUM

Linux Linux — bpf: Mark signal tracepoint siginfo arguments as scalar

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   L   L   L   N  U  N  N  H    5.5   .0017    5.3     —

AFFECTED
  Product  Versions                                    Fixed
  Linux    838a10bd2ebfe11a60dd67687533a7cfc220cc86 –  —
  Linux    6.13 –                                      6.18.53

TIMELINE
  Sep 25  Reserved by Linux
  Sep 25  Published (CNA: Linux)
  Oct 2   ENRICHED — CVE-2026-98062 (Linux). Received CVSS 5.5 and CPE data from NVD.

CWE-476 · CNA: Linux · CVSS v3.1 · 3 references · NVD status: Undergoing Analysis

Description

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
September 25, 2026	Reserved	Reserved by Linux
September 25, 2026	Published	Published (CNA: Linux)
October 2, 2026	ENRICHED	ENRICHED — CVE-2026-98062 (Linux). Received CVSS 5.5 and CPE data from NVD.

Affected

Affected products and packages — 2 rows
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
Linux	Linux	—	838a10bd2ebfe11a60dd67687533a7cfc220cc86	—
Linux	Linux	—	6.13	6.18.53

Weaknesses

CWE-476

References (3)

Authoritative record: CVE-2026-98062 at cve.org

Vendors: linux

Weaknesses: CWE-476

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-98062 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Saturday, October 3, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.