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TI-2009-01808 Aliases CVE-2009-1897GHSA-7g2j-wp9p-8rcr

The tun_chr_poll function in drivers/net/tun.c in the tun subsystem in the Linux kernel…

Priority LOW 34CWE-119Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
— Not recorded in CVSS 2.0
Attack complexity
Medium
Impact type
Code execution
Confidentiality · integrity · availability
Complete · Complete · Complete
Fix status
No fix listed

Attack profile from CVSS 2.0 · NVD. Fix status from CNA. Impact type from CWE-119 and the CVSS impact.

Summary

The tun_chr_poll function in drivers/net/tun.c in the tun subsystem in the Linux kernel 2.6.30 and 2.6.30.1, when the -fno-delete-null-pointer-checks gcc option is omitted, allows local users to gain privileges via vectors involving a NULL pointer dereference and an mmap of /dev/net/tun, a different vulnerability than CVE-2009-1894.

Why it matters now

EPSS 0.01521 74th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged 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

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 9

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:2.6.30:*:*:*:*:*:*:*2.6.30VulnerableLinux
cpe:2.3:o:linux:linux_kernel:2.6.30:rc1:*:*:*:*:*:*2.6.30 rc1VulnerableLinux
cpe:2.3:o:linux:linux_kernel:2.6.30:rc2:*:*:*:*:*:*2.6.30 rc2VulnerableLinux
cpe:2.3:o:linux:linux_kernel:2.6.30:rc3:*:*:*:*:*:*2.6.30 rc3VulnerableLinux
cpe:2.3:o:linux:linux_kernel:2.6.30:rc4:x86_32:*:*:*:*:*2.6.30 rc4VulnerableLinux
cpe:2.3:o:linux:linux_kernel:2.6.30:rc5:*:*:*:*:*:*2.6.30 rc5VulnerableLinux
cpe:2.3:o:linux:linux_kernel:2.6.30:rc6:*:*:*:*:*:*2.6.30 rc6VulnerableLinux
cpe:2.3:o:linux:linux_kernel:2.6.30:rc7-git6:*:*:*:*:*:*2.6.30 rc7-git6VulnerableLinux
cpe:2.3:o:linux:linux_kernel:2.6.30.1:*:*:*:*:*:*:*2.6.30.1VulnerableLinux
  • cpe:2.3:o:linux:linux_kernel:2.6.30:*:*:*:*:*:*:* Versions 2.6.30 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:2.6.30:rc1:*:*:*:*:*:* Versions 2.6.30 rc1 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:2.6.30:rc2:*:*:*:*:*:* Versions 2.6.30 rc2 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:2.6.30:rc3:*:*:*:*:*:* Versions 2.6.30 rc3 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:2.6.30:rc4:x86_32:*:*:*:*:* Versions 2.6.30 rc4 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:2.6.30:rc5:*:*:*:*:*:* Versions 2.6.30 rc5 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:2.6.30:rc6:*:*:*:*:*:* Versions 2.6.30 rc6 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:2.6.30:rc7-git6:*:*:*:*:*:* Versions 2.6.30 rc7-git6 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:2.6.30.1:*:*:*:*:*:*:* Versions 2.6.30.1 Vulnerable ·Linux

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2009-1897
  2. 2026-10-03 Alias added: GHSA-7g2j-wp9p-8rcr

References

Exploit 2

Patch 2

Other 7

  • 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
See all 15278 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences