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Fencer Intel
high 7.1

CVE-2013-4348 json

The skb_flow_dissect function in net/core/flow_dissector.c in the Linux kernel through 3.12 allows remote attackers to cause a denial of se…

published 2013-11-04 13 y ago modified 2026-06-16 4 mo ago also EUVD-2013-4232

cvss
7.1
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
9.7%
EPSS 9.7% chance of exploitation in 30 days, percentile 95%
public exploits
0
none known

Summary

The skb_flow_dissect function in net/core/flow_dissector.c in the Linux kernel through 3.12 allows remote attackers to cause a denial of service (infinite loop) via a small value in the IHL field of a packet with IPIP encapsulation.

Patch / fix

  • linux linux_kernel 3.2.54, 3.4.70, 3.10.20, 3.11.9, 3.12.1
  • linux Debian 14, Debian 13, Debian 12 3.11.6-2

debian advisories DEBIAN-CVE-2013-4348

  • kernel-rt enterprise mrg 2 3.8.13-rt14.25.el6rt
  • mrg-rt-release enterprise mrg 2 3.8.13-rt14.25.el6rt
  • kernel-rt-trace enterprise mrg 2 3.8.13-rt14.25.el6rt
  • kernel-rt-vanilla enterprise mrg 2 3.8.13-rt14.25.el6rt
  • kernel-rt-firmware enterprise mrg 2 3.8.13-rt14.25.el6rt
  • kernel-rt-debuginfo-common-x86_64 enterprise mrg 2 3.8.13-rt14.25.el6rt

red hat advisories RHSA-2013:1490

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-2013-4348 updated cvss 7.1

kernel: net: deadloop path in skb_flow_dissect()

  • Red Hat MRG Realtime for RHEL 6 Server v.2 kernel-rt 3.8.13-rt14.25.el6rt, mrg-rt-release 3.8.13-rt14.25.el6rt, kernel-rt-trace 3.8.13-rt14.25.el6rt, kernel-rt-vanilla 3.8.13-rt14.25.el6rt, kernel-rt-firmware 3.8.13-rt14.25.el6rt, kernel-rt-debuginfo-common-x86_64 3.8.13-rt14.25.el6rt
    fixed: vendor fix RHSA-2013:1490
  • Red Hat Enterprise Linux 5 kernel Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, python-perf, kernel-kdump, kernel-tools, +3 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

9.74% chance of exploitation in the next 30 days, higher than 95% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • git.kernel.org https://git.kernel.org/cgit/linux/kernel/git/davem/net.git/commit/?id=6f092343855a71e03b8d209815d8c45bf3a27fcd referenced PoC, tagged "exploit" by a source, unverified

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.