Improper authentication in kernel
Priority LOW 39CWE-287Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-287.
Summary
TCP firewalls could be circumvented by sending a SYN Packets with other flags (like e.g. RST flag) set, which was not correctly discarded by the Linux TCP stack after firewalling.
Why it matters now
EPSS 0.03742 89th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | kernel | before Linux kernel 2.4.20 | — | No fix listed | CNA |
- kernel Vendor— Affected before Linux kernel 2.4.20 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2002-2438
- 2026-10-03 Alias added: GHSA-w6mc-fc3q-jpx7
References
Patch 5
- [oss-security] 20120203 Re: CVE Request (2002): Linux TCP stack could accept invalid TCP flag combinations
- [oss-security] 20120529 Re: CVE Request (2002): Linux TCP stack could accept invalid TCP flag combinations
- [oss-security] 20120531 Re: CVE Request -- kernel: tcp: drop SYN+FIN messages
- [oss-security] 20120530 CVE Request -- kernel: tcp: drop SYN+FIN messages
- https://www.openwall.com/lists/oss-security/2012/02/03/7
Advisory 7
- [oss-security] 20120530 Re: CVE Request -- kernel: tcp: drop SYN+FIN messages
- [oss-security] 20120530 Re: CVE Request -- kernel: tcp: drop SYN+FIN messages
- [oss-security] 20120530 Re: CVE Request -- kernel: tcp: drop SYN+FIN messages
- [oss-security] 20120530 Re: CVE Request -- kernel: tcp: drop SYN+FIN messages
- [oss-security] 20140212 Re: Old CVE ids, public, but still "RESERVED"
- [oss-security] 20120530 Re: CVE Request -- kernel: tcp: drop SYN+FIN messages
- VU#464113
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-2002-2438 · CVE Program
- CVE-2002-2438 · NVD
- FIRST EPSS
- GHSA-w6mc-fc3q-jpx7 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences