Description
The (1) udp_recvmsg and (2) udpv6_recvmsg functions in the Linux kernel before 4.0.6 do not properly consider yielding a processor, which allows remote attackers to cause a denial of service (system hang) via incorrect checksums within a UDP packet flood.
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 | 4.0.7-1 | — |
| Debian 13 | linux | 4.0.7-1 | — |
| Debian 12 | linux | 4.0.7-1 | — |
| Debian 8 | linux | 3.16.7-ckt11-1+deb8u2 | DSA-3313-1 |
| Debian 6.0 | linux-2.6 | 2.6.32-48squeeze14 | DLA-310-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | linux-riscv +6 | No fix yet | — |
| Ubuntu 22.04 LTS | linux-riscv +2 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-gke +4 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-gcp +3 | No fix yet | — |
| Ubuntu 14.04 LTS | linux | 3.13.0-58.97 | USN-2681-1 |
| Ubuntu 14.04 LTS | linux-lts-utopic | 3.16.0-44.59~14.04.1 | USN-2682-1 |
| Ubuntu 14.04 LTS | linux-lts-vivid | 3.19.0-23.24~14.04.1 | USN-2683-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | linux-azure-fde-5.15 | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | kernel-kdump +4 | 3.10.0-229.14.1.el7 | RHSA-2015:1778 |
| RHEL 7 | kernel-rt +7 | 3.10.0-229.14.1.rt56.141.13.el7_1 | RHSA-2015:1788 |
| RHEL 7 | perf +13 | 3.10.0-229.14.1.ael7b | RHSA-2015:1778 |
| RHEL 6 | perf +16 | 2.6.32-573.3.1.el6 | RHSA-2015:1623 |
| RHEL 5 | kernel +12 | 2.6.18-408.el5 | RHSA-2016:0045 |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 6.6 EUS | perf +16 | 2.6.32-504.49.1.el6 | RHSA-2016:1100 |
| RHEL 6.5 AUS | perf +10 | 2.6.32-431.72.1.el6 | RHSA-2016:1225 |
| RHEL 6.4 AUS | perf +9 | 2.6.32-358.71.1.el6 | RHSA-2016:1096 |
| Red Hat MRG 2 | kernel-rt +10 | 1:3.10.0-229.rt56.161.el6rt | RHSA-2015:1787 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 | kernel-docs | 3.12.44-52.10.3 | SUSE-SU-2015:1324-1 |
| SLES 12 | kernel-ec2 +5 | 3.12.44-52.10.1 | SUSE-SU-2015:1324-1 |
| SLES 11 SP4 | kernel-docs | 3.0.101-65.3 | SUSE-SU-2015:1678-1 |
| SLES 11 SP4 | kernel-ec2 +7 | 3.0.101-65.1 | SUSE-SU-2015:1678-1 |
| SLES 11 SP3 | kernel-ec2 +8 | 3.0.101-0.47.67.2 | SUSE-SU-2015:1611-1, SUSE-SU-2015:1224-1 |
| SLES 11 SP2 | kernel-ec2 +6 | 3.0.101-0.7.37.1 | SUSE-SU-2015:1478-1 |
Show 6 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 | kernel-xen +3 | 3.12.44-52.10.1 | SUSE-SU-2015:1324-1 |
| SLES for SAP 11 SP4 | kernel-ec2 +7 | 3.0.101-65.1 | SUSE-SU-2015:1678-1 |
| SLES for SAP 11 SP3 | kernel-ec2 +8 | 3.0.101-0.47.67.2 | SUSE-SU-2015:1611-1 |
| SLE Real Time 11 SP4 | kernel-rt +3 | 3.0.101.rt130-45.1 | SUSE-SU-2015:2167-1 |
| SLE Real Time 11 SP3 | kernel-rt +3 | 3.0.101.rt130-0.33.40.1 | SUSE-SU-2015:1592-1 |
| 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_3 | 2-7.1 | SUSE-SU-2015:1487-1 |
| SLE Live Patching 12 | kgraft-patch-SLE12_Update_4 | 2-10.1 | SUSE-SU-2015:1491-1 |
| SLE Live Patching 12 | kgraft-patch-SLE12_Update_5 | 2-6.1 | SUSE-SU-2015:1490-1 |
| SLE Live Patching 12 | kgraft-patch-SLE12_Update_6 | 1-2.1 | SUSE-SU-2015:1324-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | dtrace-modules-3.8.13-98.1.2.el6uek | 0.4.5-2.el6 | ELSA-2015-3071 |
| Oracle Linux 7 | dtrace-modules-3.8.13-98.1.2.el7uek | 0.4.5-3.el7 | ELSA-2015-3071 |
| Oracle Linux 7 | kernel-uek +5 | 3.8.13-98.1.2.el7uek | ELSA-2015-3071 |
| Oracle Linux 7 | perf +11 | 3.10.0-229.14.1.el7 | ELSA-2015-1778 |
Advisories 27
- RHSA-2016:1225 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2016:1100 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2016:1096 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2016:0045 Red Hat Security Advisory: kernel security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2015:1788 Red Hat Security Advisory: kernel-rt security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2015:1787 Red Hat Security Advisory: kernel-rt security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2015:1778 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2015:1623 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- USN-2681-1 linux vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DLA-310-1 linux-2.6 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3313-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- USN-2682-1 linux-lts-utopic vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- USN-2683-1 linux-lts-vivid vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- SUSE-SU-2015:1491-1 Live patch for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2015:1488-1 Live patch for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2015:2167-1 Security update for kernel-source-rt SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2015:1478-1 Security update 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-2015:1678-1 Security update for kernel-source SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2015:1324-1 Security update for the SUSE Linux Enterprise 12 kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2015:1487-1 Live patch for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2015:1224-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2015:1490-1 Live patch for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2015:1611-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2015:1592-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025
- ELSA-2015-1778 Important: kernel security and bug fix update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Sep 15, 2015
- ELSA-2015-3071 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Aug 14, 2015
References
- SUSE-SU-2015:1491 vendor-advisory
- SUSE-SU-2015:1489 vendor-advisory
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=beb39db59d14990e401e235faf66a6b9b31240b0
- USN-2713-1 vendor-advisory
- SUSE-SU-2015:1488 vendor-advisory
- USN-2680-1 vendor-advisory
- USN-2682-1 vendor-advisory
- http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html
- SUSE-SU-2015:1611 vendor-advisory
- RHSA-2015:1778 vendor-advisory
- USN-2714-1 vendor-advisory
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.0.6
- RHSA-2016:1096 vendor-advisory
- https://twitter.com/grsecurity/status/605854034260426753
- SUSE-SU-2015:1324 vendor-advisory
- DSA-3329 vendor-advisory
- [oss-security] 20150630 CVE Request: UDP checksum DoS mailing-list
- https://bugzilla.redhat.com/show_bug.cgi?id=1239029
- RHSA-2015:1787 vendor-advisory
- http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
- 1032794 vdb-entry
- openSUSE-SU-2015:1382 vendor-advisory
- USN-2684-1 vendor-advisory
- DSA-3313 vendor-advisory
- http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10761
- USN-2681-1 vendor-advisory
- RHSA-2016:0045 vendor-advisory
- SUSE-SU-2015:1478 vendor-advisory
- USN-2683-1 vendor-advisory
- SUSE-SU-2015:1490 vendor-advisory
- 75510 vdb-entry
- RHSA-2016:1225 vendor-advisory
- RHSA-2016:1100 vendor-advisory
- RHSA-2015:1623 vendor-advisory
- SUSE-SU-2015:1224 vendor-advisory
- SUSE-SU-2015:1487 vendor-advisory
- SUSE-SU-2015:1592 vendor-advisory
- https://github.com/torvalds/linux/commit/beb39db59d14990e401e235faf66a6b9b31240b0