Description
The IPv4 implementation in the Linux kernel before 3.18.8 does not properly consider the length of the Read-Copy Update (RCU) grace period for redirecting lookups in the absence of caching, which allows remote attackers to cause a denial of service (memory consumption or system crash) via a flood of packets.
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 | 3.16.7-ckt7-1 | — |
| Debian 13 | linux | 3.16.7-ckt7-1 | — |
| Debian 12 | linux | 3.16.7-ckt7-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | linux | 3.13.0-49.81 | USN-2563-1 |
| Ubuntu 14.04 LTS | linux-lts-utopic | 3.16.0-33.44~14.04.1 | USN-2545-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 | kernel-docs +1 | 3.12.43-52.6.2 | SUSE-SU-2015:1071-1 |
| SLES 12 | kernel-ec2 +4 | 3.12.43-52.6.1 | SUSE-SU-2015:1071-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 | kernel-xen +3 | 3.12.43-52.6.1 | SUSE-SU-2015:1071-1 |
| SLE Live Patching 12 | kgraft-patch-SLE12_Update_1 +1 | 3-2.1 | SUSE-SU-2015:1489-1, SUSE-SU-2015:1488-1 |
| SLE Live Patching 12 | kgraft-patch-SLE12_Update_5 | 1-2.3 | SUSE-SU-2015:1071-1 |
Advisories 5
- USN-2563-1 linux vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-2545-1 linux-lts-utopic vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- SUSE-SU-2015:1488-1 Live patch for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2015:1489-1 Live patch for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2015:1071-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
References
- SUSE-SU-2015:1489 vendor-advisory
- USN-2562-1 vendor-advisory
- SUSE-SU-2015:1488 vendor-advisory
- USN-2546-1 vendor-advisory
- USN-2563-1 vendor-advisory
- openSUSE-SU-2015:1382 vendor-advisory
- 1036763 vdb-entry
- [oss-security] 20150203 Re: CVE request -- Linux kernel - net: DoS due to routing packets to too many different dsts/too fast mailing-list
- https://bugzilla.redhat.com/show_bug.cgi?id=1183744
- USN-2545-1 vendor-advisory
- https://github.com/torvalds/linux/commit/df4d92549f23e1c037e83323aff58a21b3de7fe0
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=df4d92549f23e1c037e83323aff58a21b3de7fe0
- 72435 vdb-entry
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.18.8