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Fencer Intel
high 7.1

CVE-2010-1188 json

Use-after-free vulnerability in net/ipv4/tcp_input.c in the Linux kernel 2.6 before 2.6.20, when IPV6_RECVPKTINFO is set on a listening soc…

published 16y ago modified 4mo ago also EUVD-2010-1218

cvss
7.1
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.3%
EPSS 3.3% chance of exploitation in 30 days, percentile 88%
public exploits
0
none known

Summary

Use-after-free vulnerability in net/ipv4/tcp_input.c in the Linux kernel 2.6 before 2.6.20, when IPV6_RECVPKTINFO is set on a listening socket, allows remote attackers to cause a denial of service (kernel panic) via a SYN packet while the socket is in a listening (TCP_LISTEN) state, which is not properly handled and causes the skb structure to be freed.

Patch / fix

  • kernel RHEL 4 2.6.9-89.0.25.EL
  • kernel-smp RHEL 4 2.6.9-89.0.25.EL
  • kernel-xenU RHEL 4 2.6.9-89.0.25.EL
  • kernel-hugemem RHEL 4 2.6.9-89.0.25.EL
  • kernel-largesmp RHEL 4 2.6.9-89.0.25.EL
  • kernel RHEL 5 2.6.18-194.el5
  • kernel-PAE RHEL 5 2.6.18-194.el5
  • kernel-xen RHEL 5 2.6.18-194.el5

red hat advisories RHSA-2010:0394RHSA-2010:0882RHSA-2010:0439RHSA-2010:0424RHSA-2010:0380RHSA-2010:0178

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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-2010-1188 updated cvss 7.8

kernel: ipv6: skb is unexpectedly freed

  • Red Hat Enterprise Linux (v. 5 server) kernel 2.6.18-194.el5, kernel-PAE 2.6.18-194.el5, kernel-xen 2.6.18-194.el5, kernel-kdump 2.6.18-194.el5, kernel-debuginfo-common 2.6.18-194.el5
    fixed: vendor fix RHSA-2010:0178
  • Red Hat Enterprise Linux AS (v. 3 ELS) kernel 2.4.21-66.EL, kernel-smp 2.4.21-66.EL, kernel-BOOT 2.4.21-66.EL, kernel-source 2.4.21-66.EL, kernel-hugemem 2.4.21-66.EL, kernel-unsupported 2.4.21-66.EL, +2 more
    fixed: vendor fix RHSA-2010:0882
  • Red Hat Enterprise Linux AS EUS (v. 4.7) kernel 2.6.9-78.0.31.EL, kernel-smp 2.6.9-78.0.31.EL, kernel-xenU 2.6.9-78.0.31.EL, kernel-hugemem 2.6.9-78.0.31.EL, kernel-largesmp 2.6.9-78.0.31.EL
    fixed: vendor fix RHSA-2010:0424
  • Red Hat Enterprise Linux AS version 4 kernel 2.6.9-89.0.25.EL, kernel-smp 2.6.9-89.0.25.EL, kernel-xenU 2.6.9-89.0.25.EL, kernel-hugemem 2.6.9-89.0.25.EL, kernel-largesmp 2.6.9-89.0.25.EL
    fixed: vendor fix RHSA-2010:0394
  • Red Hat Enterprise Linux Desktop (v. 5 client) kernel 2.6.18-194.el5, kernel-PAE 2.6.18-194.el5, kernel-xen 2.6.18-194.el5, kernel-debuginfo-common 2.6.18-194.el5
    fixed: vendor fix RHSA-2010:0178
  • Red Hat Enterprise Linux Desktop version 4 kernel 2.6.9-89.0.25.EL, kernel-smp 2.6.9-89.0.25.EL, kernel-xenU 2.6.9-89.0.25.EL, kernel-hugemem 2.6.9-89.0.25.EL, kernel-largesmp 2.6.9-89.0.25.EL
    fixed: vendor fix RHSA-2010:0394
  • Red Hat Enterprise Linux ES (v. 3 ELS) kernel 2.4.21-66.EL, kernel-smp 2.4.21-66.EL, kernel-BOOT 2.4.21-66.EL, kernel-source 2.4.21-66.EL, kernel-hugemem 2.4.21-66.EL, kernel-unsupported 2.4.21-66.EL, +2 more
    fixed: vendor fix RHSA-2010:0882
  • Red Hat Enterprise Linux ES EUS (v. 4.7) kernel 2.6.9-78.0.31.EL, kernel-smp 2.6.9-78.0.31.EL, kernel-xenU 2.6.9-78.0.31.EL, kernel-hugemem 2.6.9-78.0.31.EL, kernel-largesmp 2.6.9-78.0.31.EL
    fixed: vendor fix RHSA-2010:0424
show 5 more
  • Red Hat Enterprise Linux ES version 4 kernel 2.6.9-89.0.25.EL, kernel-smp 2.6.9-89.0.25.EL, kernel-xenU 2.6.9-89.0.25.EL, kernel-hugemem 2.6.9-89.0.25.EL, kernel-largesmp 2.6.9-89.0.25.EL
    fixed: vendor fix RHSA-2010:0394
  • Red Hat Enterprise Linux EUS (v. 5.3 server) kernel 2.6.18-128.17.1.el5, kernel-PAE 2.6.18-128.17.1.el5, kernel-xen 2.6.18-128.17.1.el5, kernel-kdump 2.6.18-128.17.1.el5, kernel-debuginfo-common 2.6.18-128.17.1.el5
    fixed: vendor fix RHSA-2010:0439
  • Red Hat Enterprise Linux EUS (v. 5.4 server) kernel 2.6.18-164.17.1.el5, kernel-PAE 2.6.18-164.17.1.el5, kernel-xen 2.6.18-164.17.1.el5, kernel-kdump 2.6.18-164.17.1.el5, kernel-debuginfo-common 2.6.18-164.17.1.el5
    fixed: vendor fix RHSA-2010:0380
  • Red Hat Enterprise Linux WS version 4 kernel 2.6.9-89.0.25.EL, kernel-smp 2.6.9-89.0.25.EL, kernel-xenU 2.6.9-89.0.25.EL, kernel-hugemem 2.6.9-89.0.25.EL, kernel-largesmp 2.6.9-89.0.25.EL
    fixed: vendor fix RHSA-2010:0394
  • Red Hat Enterprise Linux (v. 5 server) kernel-headers 2.6.18-194.el5 Red Hat Enterprise Linux Desktop (v. 5 client) kernel-headers 2.6.18-194.el5 Red Hat Enterprise Linux EUS (v. 5.4 server) kernel-headers 2.6.18-164.17.1.el5
    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

3.30% chance of exploitation in the next 30 days, higher than 88% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 7.1 AV:N/AC:M/Au:N/C:N/I:N/A:C

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.