Description
Race condition in the sctp_icmp_proto_unreachable function in net/sctp/input.c in Linux kernel 2.6.11-rc2 through 2.6.33 allows remote attackers to cause a denial of service (panic) via an ICMP unreachable message to a socket that is already locked by a user, which causes the socket to be freed and triggers list corruption, related to the sctp_wait_for_connect function.
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 5.0 | linux-2.6 | 2.6.26-26lenny2 | DSA-2153-1 |
| Debian 5.0 | user-mode-linux | 2.6.26-1um-2+26lenny2 | DSA-2153-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 6 | perf +13 | 2.6.32-71.24.1.el6 | RHSA-2011:0421 |
| RHEL 5 | kernel +12 | 2.6.18-238.1.1.el5 | RHSA-2011:0163 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat MRG 2 | kernel-rt +10 | 2.6.33.9-rt31.75.el6rt | RHSA-2011:1253 |
Advisories 4
- RHSA-2011:1253 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2011:0421 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2011:0163 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- DSA-2153-1 linux-2.6 - several issues Debian Security (DSA / DLA) · Mar 9, 2026
References
- RHSA-2011:0163 vendor-advisory
- [oss-security] 20110104 Re: CVE-2010-4526 kernel: sctp: a race between ICMP protocol unreachable and connect() mailing-list
- 20111013 VMSA-2011-0012 VMware ESXi and ESX updates to third party libraries and ESX Service Console mailing-list
- 46397 third-party-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2010-4526
- http://www.vmware.com/security/advisories/VMSA-2011-0012.html
- [oss-security] 20110104 CVE-2010-4526 kernel: sctp: a race between ICMP protocol unreachable and connect() mailing-list
- 45661 vdb-entry
- ADV-2011-0169 vdb-entry
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%3Bh=50b5d6ad63821cea324a5a7a19854d4de1a0a819
- kernel-icmp-message-dos(64616) vdb-entry
- 42964 third-party-advisory