CVE-2026-98062
- Source
- https://cve.org/CVERecord?id=CVE-2026-98062
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98062.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-98062
- Downstream
- Related
- Published
- 2026-09-25T10:24:06Z
- Modified
- 2026-10-09T17:26:59Z
- Summary
- bpf: Mark signal tracepoint siginfo arguments as scalar
- Details
-
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.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98062.json" }- References
-
- https://git.kernel.org/stable/c/0e78cb242a57e481061fcb542fed4d51afba25c4
- https://git.kernel.org/stable/c/77515ab12e4983e6416f8c35039a3f0c0822ac70
- https://git.kernel.org/stable/c/d2eaea3599bcce659ce91862254dc91bcbdb6351
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98062.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-98062
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced838a10bd2ebfe11a60dd67687533a7cfc220cc86Fixed0e78cb242a57e481061fcb542fed4d51afba25c4Fixedd2eaea3599bcce659ce91862254dc91bcbdb6351Fixed77515ab12e4983e6416f8c35039a3f0c0822ac70
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced6.12.6Fixed6.13
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedb2fc4b17fc13810ef440fb323fad3981cd174985