Description
net/ipv4/netfilter/ip_conntrack_core.c in Linux kernel 2.4 and 2.6, and possibly net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c in 2.6, does not clear sockaddr_in.sin_zero before returning IPv4 socket names from the getsockopt function with SO_ORIGINAL_DST, which allows local users to obtain portions of potentially sensitive memory.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 3.1 | fai-kernels | 1.9.1sarge4 | DSA-1184-2 |
| Debian 3.1 | kernel-source-2.4.27 | 2.4.27-10sarge3 | DSA-1097-1 |
| Debian 3.1 | kernel-source-2.6.8 | 2.6.8-16sarge5 | DSA-1184-2 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 4 | kernel +8 | 2.6.9-42.EL | RHSA-2006:0575 |
| RHEL 3 | kernel +8 | 2.4.21-47.EL | RHSA-2006:0437 |
Advisories 4
- RHSA-2006:0575 Red Hat Security Advisory: Updated kernel packages available for Red Hat Enterprise Linux 4 Update 4 Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2006:0437 Red Hat Security Advisory: Updated kernel packages for Red Hat Enterprise Linux 3 Update 8 Red Hat Security Advisories (RHSA) · Jun 26, 2026
- DSA-1097-1 kernel-source-2.4.27 - several vulnerabilities Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-1184-2 kernel-source-2.6.8 - several vulnerabilities Debian Security (DSA / DLA) · Mar 9, 2026
References
- RHSA-2006:0437 vendor-advisory
- ADV-2006-4502 vdb-entry
- 20060531 rPSA-2006-0087-1 kernel mailing-list
- RHSA-2006:0579 vendor-advisory
- USN-281-1 vendor-advisory
- 29841 vdb-entry
- 22875 third-party-advisory
- 21136 third-party-advisory
- MDKSA-2006:150 vendor-advisory
- http://www.vmware.com/download/esx/esx-202-200610-patch.html
- 2006-0032 vendor-advisory
- MDKSA-2006:123 vendor-advisory
- 20061113 VMSA-2006-0008 - VMware ESX Server 2.0.2 Upgrade Patch 2 mailing-list
- 21983 third-party-advisory
- http://www.vmware.com/download/esx/esx-213-200610-patch.html
- linux-sockaddr-memory-leak(25425) vdb-entry
- DSA-1097 vendor-advisory
- RHSA-2006:0575 vendor-advisory
- 19955 third-party-advisory
- oval:org.mitre.oval:def:10875 vdb-entry signature
- RHSA-2006:0580 vendor-advisory
- http://support.avaya.com/elmodocs2/security/ASA-2006-180.htm
- http://www.vmware.com/download/esx/esx-254-200610-patch.html
- 19357 third-party-advisory
- 21465 third-party-advisory
- 20061113 VMSA-2006-0006 - VMware ESX Server 2.5.3 Upgrade Patch 4 mailing-list
- 21045 third-party-advisory
- http://support.avaya.com/elmodocs2/security/ASA-2006-200.htm
- 20061113 VMSA-2006-0007 - VMware ESX Server 2.1.3 Upgrade Patch 2 mailing-list
- 22417 third-party-advisory
- 17203 vdb-entry
- 22093 third-party-advisory
- 20671 third-party-advisory
- ADV-2006-2071 vdb-entry
- 20061113 VMSA-2006-0005 - VMware ESX Server 2.5.4 Upgrade Patch 1 mailing-list
- DSA-1184 vendor-advisory
- [linux-netdev] 20060304 BUG: Small information leak in SO_ORIGINAL_DST (2.4 and 2.6) and mailing-list