CVE-2026-98062

CVE CVE-2026-98062EUVD EUVD-2026-86715Published 2026-09-25T10:24:06.000Z

What the advisory describes

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.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux 838a10bd2ebfe11a60dd67687533a7cfc220cc86 <77515ab12e4983e6416f8c35039a3f0c0822ac70; 6.12.6 <6.13; patch: 7.2.7; 838a10bd2ebfe11a60dd67687533a7cfc220cc86 <0e78cb242a57e481061fcb542fed4d51afba25c4; patch: 6.18.53; b2fc4b17fc13810ef440fb323fad3981cd174985; patch: 0; 6.13; 838a10bd2ebfe11a60dd67687533a7cfc220cc86 <d2eaea3599bcce659ce91862254dc91bcbdb6351; patch: 7.3-rc2

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

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Linux — Linux

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