Description
The sctp_auth_asoc_get_hmac function in net/sctp/auth.c in the Linux kernel before 2.6.36 does not properly validate the hmac_ids array of an SCTP peer, which allows remote attackers to cause a denial of service (memory corruption and panic) via a crafted value in the last element of this array.
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 | 2.6.26-26lenny1 | DSA-2126-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 6 | perf +14 | 2.6.32-71.7.1.el6 | RHSA-2010:0842 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat MRG 1 | perf +10 | 2.6.33.7-rt29.47.el5rt | RHSA-2010:0958 |
Advisories 3
- RHSA-2010:0958 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2010:0842 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- DSA-2126-1 linux-2.6 - several issues Debian Security (DSA / DLA) · Mar 9, 2026
References
- USN-1000-1 vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=640036
- [oss-security] 20101004 CVE request: kernel: SCTP memory corruption in HMAC handling mailing-list
- FEDORA-2010-18983 vendor-advisory
- http://git.kernel.org/?p=linux/kernel/git/davem/net-2.6.git%3Ba=commit%3Bh=51e97a12bef19b7e43199fc153cf9bd5f2140362
- ADV-2010-3321 vdb-entry
- RHSA-2010:0842 vendor-advisory
- RHSA-2010:0958 vendor-advisory
- [oss-security] 20101004 Re: CVE request: kernel: SCTP memory corruption in HMAC handling mailing-list
- http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.36
- MDVSA-2011:029 vendor-advisory
- [linux-kernel] 20101001 [PATCH] Fix out-of-bounds reading in sctp_asoc_get_hmac() mailing-list
- 42745 third-party-advisory
- DSA-2126 vendor-advisory