net/iucv: Avoid explicit cpumask var allocation on stack
Priority LOW 31CWE-787Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · None · High
- Fix status
- Partial Red Hat: 14 fixed, 4 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat.
Summary
In the Linux kernel, the following vulnerability has been resolved: net/iucv: Avoid explicit cpumask var allocation on stack For CONFIG_CPUMASK_OFFSTACK=y kernel, explicit allocation of cpumask variable on stack is not recommended since it can cause potential stack overflow. Instead, kernel code should always use *cpumask_var API(s) to allocate cpumask var in config-neutral way, leaving allocation strategy to CONFIG_CPUMASK_OFFSTACK. Use *cpumask_var API(s) to address it.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00235 14th percentileScored 2026-11-07
Fix Partial Linux (Linux): 4.19.317, 5.4.279, 5.10.221 +5Red Hat: 3 advisoriesRed Hat: 14 fixed, 4 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 2.6.21 and later | 4.19.317, 5.4.279, 5.10.221, 5.15.162, 6.1.97, 6.6.37, 6.9.8, 6.10 | Patch available | CNA |
- Linux VendorLinux Affected 2.6.21 and later Fixed in 4.19.317, 5.4.279, 5.10.221, 5.15.162, 6.1.97, 6.6.37, 6.9.8, 6.10 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | before 4.19.317; 4.20 to before 5.4.279; 5.5 to before 5.10.221; 5.11 to before 5.15.162; 5.16 to before 6.1.97; 6.2 to before 6.6.37; 6.7 to before 6.9.8 | Vulnerable | Linux |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions before 4.19.317; 4.20 to before 5.4.279; 5.5 to before 5.10.221; 5.11 to before 5.15.162; 5.16 to before 6.1.97; 6.2 to before 6.6.37; 6.7 to before 6.9.8 Vulnerable ·Linux
Remediation
- Fix · CNA Linux (Linux) Fixed in 4.19.317, 5.4.279, 5.10.221, 5.15.162, 6.1.97, 6.6.37, 6.9.8, 6.10
Red Hat 3 advisories
- RHSA-2025:15668 Released 2025-09-11 · Red Hat rating Importantkernel security update
- Red Hat CodeReady Linux Builder EUS (v.9.4) kernel-tools-libs-devel-5.14.0-427.88.1.el9_4, libperf-5.14.0-427.88.1.el9_4
- Red Hat Enterprise Linux AppStream EUS (v.9.4) kernel-64k-debug-devel-5.14.0-427.88.1.el9_4, kernel-64k-debug-devel-matched-5.14.0-427.88.1.el9_4, kernel-64k-devel-5.14.0-427.88.1.el9_4 +10
- Red Hat Enterprise Linux BaseOS EUS (v.9.4) bpftool-7.3.0-427.88.1.el9_4, kernel-5.14.0-427.88.1.el9_4, kernel-64k-5.14.0-427.88.1.el9_4 +29
- Red Hat Enterprise Linux Real Time EUS (v.9.4) kernel-rt-5.14.0-427.88.1.el9_4, kernel-rt-core-5.14.0-427.88.1.el9_4, kernel-rt-debug-5.14.0-427.88.1.el9_4 +9
- Red Hat Enterprise Linux Real Time for NFV EUS (v.9.4) kernel-rt-5.14.0-427.88.1.el9_4, kernel-rt-core-5.14.0-427.88.1.el9_4, kernel-rt-debug-5.14.0-427.88.1.el9_4 +11
- RHSA-2025:6966 Released 2025-05-13 · Red Hat rating Moderatekernel security update
- Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-570.12.1.el9_6, kernel-64k-debug-devel-matched-5.14.0-570.12.1.el9_6, kernel-64k-devel-5.14.0-570.12.1.el9_6 +12
- Red Hat Enterprise Linux BaseOS (v. 9) kernel-5.14.0-570.12.1.el9_6, kernel-64k-5.14.0-570.12.1.el9_6, kernel-64k-core-5.14.0-570.12.1.el9_6 +28
- Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) kernel-tools-libs-devel-5.14.0-570.12.1.el9_6, libperf-5.14.0-570.12.1.el9_6
- Red Hat Enterprise Linux Real Time (v. 9) kernel-rt-5.14.0-570.12.1.el9_6, kernel-rt-64k-5.14.0-570.12.1.el9_6, kernel-rt-64k-core-5.14.0-570.12.1.el9_6 +21
- Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt-5.14.0-570.12.1.el9_6, kernel-rt-core-5.14.0-570.12.1.el9_6, kernel-rt-debug-5.14.0-570.12.1.el9_6 +11
- RHSA-2024:7000 Released 2024-09-24 · Red Hat rating Importantkernel security update
- Red Hat Enterprise Linux BaseOS (v. 8) bpftool-4.18.0-553.22.1.el8_10, kernel-4.18.0-553.22.1.el8_10, kernel-abi-stablelists-4.18.0-553.22.1.el8_10 +19
- Red Hat Enterprise Linux CRB (v. 8) kernel-tools-libs-devel-4.18.0-553.22.1.el8_10
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 8 | Affected | No fix yet |
| Red Hat Enterprise Linux 9 | Affected | No fix planned: Will not fix |
| RHOAI-2.13-RHEL-8 | Fixed | — |
| RHOAI-2.14-RHEL-8 | Fixed | — |
| Red Hat CodeReady Linux Builder EUS (v.9.4) | Fixed | RHSA-2025:15668 |
| Red Hat Enterprise Linux AppStream (v. 9) | Fixed | RHSA-2025:6966 |
| Red Hat Enterprise Linux AppStream EUS (v.9.4) | Fixed | RHSA-2025:15668 |
| Red Hat Enterprise Linux BaseOS (v. 8) | Fixed | RHSA-2024:7000 |
| Red Hat Enterprise Linux BaseOS (v. 9) | Fixed | RHSA-2025:6966 |
| Red Hat Enterprise Linux BaseOS EUS (v.9.4) | Fixed | RHSA-2025:15668 |
| Red Hat Enterprise Linux CRB (v. 8) | Fixed | RHSA-2024:7000 |
| Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) | Fixed | RHSA-2025:6966 |
| Red Hat Enterprise Linux Real Time (v. 9) | Fixed | RHSA-2025:6966 |
| Red Hat Enterprise Linux Real Time EUS (v.9.4) | Fixed | RHSA-2025:15668 |
| Red Hat Enterprise Linux Real Time for NFV (v. 9) | Fixed | RHSA-2025:6966 |
| Red Hat Enterprise Linux Real Time for NFV EUS (v.9.4) | Fixed | RHSA-2025:15668 |
Not affected: 1 product
- Red Hat Enterprise Linux AppStream EUS (v.9.4)
Timeline
- 2026-10-02 Threatist record created from CVE-2024-42094
- 2026-10-03 Alias added: GHSA-mwj6-494m-mx84
- 2026-10-29 Affected versions changed · Red Hat
- 2026-10-30 Fix available: RHOAI-2.13-RHEL-8, RHOAI-2.14-RHEL-8 · Red Hat
References
Patch 8
- https://git.kernel.org/stable/c/2b085521be5292016097b5e7ca81b26be3f7098d
- https://git.kernel.org/stable/c/842afb47d84536fc976fece8fb6c54bea711ad1a
- https://git.kernel.org/stable/c/9dadab0db7d904413ea1cdaa13f127da05c31e71
- https://git.kernel.org/stable/c/0af718a690acc089aa1bbb95a93df833d864ef53
- https://git.kernel.org/stable/c/d85ca8179a54ff8cf1e1f8c3c9e3799831319bae
- https://git.kernel.org/stable/c/724e7965af054079242b8d6f7e50ee226730a756
- https://git.kernel.org/stable/c/2d090c7f7be3b26fcb80ac04d08a4a8062b1d959
- https://git.kernel.org/stable/c/be4e1304419c99a164b4c0e101c7c2a756b635b9
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Sources
- CVE-2024-42094 · CVE Program
- CVE-2024-42094 · NVD
- FIRST EPSS
- GHSA-mwj6-494m-mx84 · GitHub Advisory Database · CC BY 4.0
- CVE-2024-42094 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences