bpf: Guard __get_user acesss with access_ok for uprobe_multi data
Priority LOW 35Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Partial Red Hat: 2 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.
Summary
In the Linux kernel, the following vulnerability has been resolved: bpf: Guard __get_user acesss with access_ok for uprobe_multi data As reported by sashiko [1] we need to use access_ok to check the user space data bounds before we use __get-user to get it. [1] https://lore.kernel.org/bpf/[email protected]/
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00168 6th percentileScored 2026-11-07
Fix Partial Linux (Linux): 6.6.158, 6.12.111, 6.18.53 +2Red Hat: 2 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
- Fix · CNA Linux (Linux) Fixed in 6.6.158, 6.12.111, 6.18.53, 7.1.5, 7.2
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 10 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 9 | Affected | No fix yet: Fix deferred |
Not affected: 4 products
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
Timeline
- 2026-10-02 Threatist record created from CVE-2026-74258
- 2026-10-03 Alias added: GHSA-pwvf-7f5w-2qr5
- 2026-10-03 Fix available: Linux/[email protected], Linux/Linux@ff6c5ee77dcc98381290d16af53f6262625870a6 · CNA
- 2026-10-03 1 new reference · CNA
- 2026-10-16 CISA SSVC decision points changed
- 2026-10-29 Affected versions changed · Red Hat
References
Other 5
- https://git.kernel.org/stable/c/ff6c5ee77dcc98381290d16af53f6262625870a6
- https://git.kernel.org/stable/c/2c387db784293256d35fd3d438f577cc82bb823d
- https://git.kernel.org/stable/c/a9f1395028c2bbe18e57864cc355c11faff488cb
- https://git.kernel.org/stable/c/c6d51ad36490013ee9df94a372d3bf794bd304d1
- https://git.kernel.org/stable/c/4d87a251d45b4a95eb4c0abcfab809c9f231258a
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- TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
- TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
- TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
Sources
- CVE-2026-74258 · CVE Program
- CVE-2026-74258 · NVD
- FIRST EPSS
- GHSA-pwvf-7f5w-2qr5 · GitHub Advisory Database · CC BY 4.0
- CVE-2026-74258 · Red Hat security data · CC BY 4.0
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