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Fencer Intel
medium 5.0

CVE-2012-1583 json

Double free vulnerability in the xfrm6_tunnel_rcv function in net/ipv6/xfrm6_tunnel.c in the Linux kernel before 2.6.22, when the xfrm6_tun…

published 2012-06-16 14 y ago modified 2026-06-16 4 mo ago also EUVD-2012-1600

cvss
5.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.6%
EPSS 3.6% chance of exploitation in 30 days, percentile 89%
public exploits
0
none known

Summary

Double free vulnerability in the xfrm6_tunnel_rcv function in net/ipv6/xfrm6_tunnel.c in the Linux kernel before 2.6.22, when the xfrm6_tunnel module is enabled, allows remote attackers to cause a denial of service (panic) via crafted IPv6 packets.

Patch / fix

  • kernel RHEL 5 2.6.18-308.4.1.el5
  • kernel-PAE RHEL 5 2.6.18-308.4.1.el5
  • kernel-xen RHEL 5 2.6.18-308.4.1.el5
  • kernel-kdump RHEL 5 2.6.18-308.4.1.el5
  • kernel-debuginfo-common RHEL 5 2.6.18-308.4.1.el5
  • kernel RHEL 5.6 EUS 2.6.18-238.39.1.el5
  • kernel-PAE RHEL 5.6 EUS 2.6.18-238.39.1.el5
  • kernel-xen RHEL 5.6 EUS 2.6.18-238.39.1.el5

red hat advisories RHSA-2012:0720RHSA-2012:0480

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2012-1583 updated cvss 7.8

kernel: ipv6: panic using raw sockets

  • Red Hat Enterprise Linux 4 kernel
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise MRG 2 kernel-rt, mrg-rt-release, kernel-rt-trace, kernel-rt-vanilla, kernel-rt-firmware
    affected: no fix available
  • Red Hat Enterprise Linux (v. 5 server) kernel 2.6.18-308.4.1.el5, kernel-PAE 2.6.18-308.4.1.el5, kernel-xen 2.6.18-308.4.1.el5, kernel-kdump 2.6.18-308.4.1.el5, kernel-debuginfo-common 2.6.18-308.4.1.el5 Red Hat Enterprise Linux Desktop (v. 5 client) kernel 2.6.18-308.4.1.el5, kernel-PAE 2.6.18-308.4.1.el5, kernel-xen 2.6.18-308.4.1.el5, kernel-debuginfo-common 2.6.18-308.4.1.el5
    fixed: vendor fix RHSA-2012:0480
  • Red Hat Enterprise Linux EUS (v. 5.6 server) kernel 2.6.18-238.39.1.el5, kernel-PAE 2.6.18-238.39.1.el5, kernel-xen 2.6.18-238.39.1.el5, kernel-kdump 2.6.18-238.39.1.el5, kernel-debuginfo-common 2.6.18-238.39.1.el5
    fixed: vendor fix RHSA-2012:0720
  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

3.57% chance of exploitation in the next 30 days, higher than 89% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • github.com https://github.com/torvalds/linux/commit/d0772b70faaf8e9f2013b6c4273d94d5eac8047a referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness
  • CWE-399 Resource Management Errors
Technology feeds

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.