bpf: Mark signal tracepoint siginfo arguments as scalar
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.
CVE-2026-98062
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-98062
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "b2fc4b17fc13810ef440fb323fad3981cd174985",
"lessThan": "05757377fa0447163d07c43a119f81abe1eef8dc",
"versionType": "git"
},
{
"status": "affected",
"version": "838a10bd2ebfe11a60dd67687533a7cfc220cc86",
"lessThan": "0e78cb242a57e481061fcb542fed4d51afba25c4",
"versionType": "git"
},
{
"status": "affected",
"version": "838a10bd2ebfe11a60dd67687533a7cfc220cc86",
"lessThan": "d2eaea3599bcce659ce91862254dc91bcbdb6351",
"versionType": "git"
},
{
"status": "affected",
"version": "838a10bd2ebfe11a60dd67687533a7cfc220cc86",
"lessThan": "77515ab12e4983e6416f8c35039a3f0c0822ac70",
"versionType": "git"
},
{
"status": "affected",
"version": "6.12.6",
"lessThan": "6.12.114",
"versionType": "semver"
}
],
"programFiles": [
"kernel/bpf/btf.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.13"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.13",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.12.114",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.53",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.7",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"kernel/bpf/btf.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98062
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #48843 · Revision 1
- Added to Heist Feed
- Publisher date