Description
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.
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 14 | linux | 3.11.6-2 | — |
| Debian 13 | linux | 3.11.6-2 | — |
| Debian 12 | linux | 3.11.6-2 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat MRG 2 | kernel-rt +11 | 3.8.13-rt14.25.el6rt | RHSA-2013:1490 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | dtrace-modules-3.8.13-35.3.2.el7uek | 0.4.3-4.el7 | ELSA-2014-3049 |
| Oracle Linux 7 | kernel-uek +5 | 3.8.13-35.3.2.el7uek | ELSA-2014-3049 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
GitHub 1 repository
-
bl4ck5un/cve-2013-4348 ★ 0 · Apr 7, 2014
DOS (infinite loop) attack via a small value in the IHL field of a packet with IPIP encapsulation
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 2
- RHSA-2013:1490 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- ELSA-2014-3049 Important: unbreakable enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Jul 23, 2014
References
- RHSA-2013:1490 vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1007939
- USN-2070-1 vendor-advisory
- openSUSE-SU-2014:0204 vendor-advisory
- USN-2075-1 vendor-advisory
- https://git.kernel.org/cgit/linux/kernel/git/davem/net.git/commit/?id=6f092343855a71e03b8d209815d8c45bf3a27fcd