CDC-NCM: avoid overflow in sanity checking
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 4 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-190 and the CVSS impact.
Summary
In the Linux kernel, the following vulnerability has been resolved: CDC-NCM: avoid overflow in sanity checking A broken device may give an extreme offset like 0xFFF0 and a reasonable length for a fragment. In the sanity check as formulated now, this will create an integer overflow, defeating the sanity check. Both offset and offset + len need to be checked in such a manner that no overflow can occur. And those quantities should be unsigned.
Why it matters now
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 | 4.19.285 to before 4.19.323; 5.4.245 to before 5.4.285; 4.14.317 to before 4.15 | 4.19.323, 5.4.285, 4.15 | Patch available | CNA |
| Linux | Linux | 5.7 and later | 4.19.323, 5.4.285, 5.10.103, 5.15.26, 5.16.12, 5.17 | Patch available | CNA |
- Linux VendorLinux Affected 4.19.285 to before 4.19.323; 5.4.245 to before 5.4.285; 4.14.317 to before 4.15 Fixed in 4.19.323, 5.4.285, 4.15 Patch available CNA
- Linux VendorLinux Affected 5.7 and later Fixed in 4.19.323, 5.4.285, 5.10.103, 5.15.26, 5.16.12, 5.17 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | before 5.10.103; 5.11 to before 5.15.26; 5.16 to before 5.16.12 | Vulnerable | Linux |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions before 5.10.103; 5.11 to before 5.15.26; 5.16 to before 5.16.12 Vulnerable ·Linux
Remediation
- Fix · CNA Linux (Linux) Fixed in 4.19.323, 5.4.285, 4.15
- Fix · CNA Linux (Linux) Fixed in 4.19.323, 5.4.285, 5.10.103, 5.15.26, 5.16.12, 5.17
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 planned: Will not fix |
| Red Hat Enterprise Linux 9 | Affected | No fix planned: Will not fix |
Timeline
- 2026-10-02 Threatist record created from CVE-2022-48938
- 2026-10-03 Alias added: GHSA-33fw-34vg-hgjh
References
Patch 4
More Linux Kernel vulnerabilities
- TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
- TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
- 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
- TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
Sources
- CVE-2022-48938 · CVE Program
- CVE-2022-48938 · NVD
- FIRST EPSS
- GHSA-33fw-34vg-hgjh · GitHub Advisory Database · CC BY 4.0
- CVE-2022-48938 · 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