Description
The sctp_auth_ep_set_hmacs function in net/sctp/auth.c in the Stream Control Transmission Protocol (sctp) implementation in the Linux kernel before 2.6.26.4, when the SCTP-AUTH extension is enabled, does not verify that the identifier index is within the bounds established by SCTP_AUTH_HMAC_ID_MAX, which allows local users to obtain sensitive information via a crafted SCTP_HMAC_IDENT IOCTL request involving the sctp_getsockopt function, a different vulnerability than CVE-2008-4113.
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 4.0 | linux-2.6.24 | 2.6.24-6~etchnhalf.6 | DSA-1655-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat MRG 1 | kernel-rt +9 | 2.6.24.7-81.el5rt | RHSA-2008:0857 |
Advisories 2
- DSA-1655-1 linux-2.6.24 - several vulnerabilities Debian Security (DSA / DLA) · Mar 9, 2026
- RHSA-2008:0857 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Nov 22, 2025
References
- 32190 third-party-advisory
- DSA-1655 vendor-advisory
- 32393 third-party-advisory
- 31121 vdb-entry
- [oss-security] 20080929 Re: CVE-2008-4113 update: kernel: sctp: fix random memory dereference with SCTP_HMAC_IDENT option mailing-list
- MDVSA-2008:223 vendor-advisory
- USN-659-1 vendor-advisory
- http://git.kernel.org/?p=linux/kernel/git/stable/linux-2.6.26.y.git%3Ba=commit%3Bh=d97240552cd98c4b07322f30f66fd9c3ba4171de
- SUSE-SA:2008:053 vendor-advisory
- RHSA-2008:0857 vendor-advisory
- 1021001 vdb-entry
- [linux-sctp] 20080827 [PATCH 0/2] sctp: additional overflow fixes mailing-list
- [oss-security] 20080925 CVE-2008-4113 update: kernel: sctp: fix random memory dereference with SCTP_HMAC_IDENT option mailing-list
- http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.26.4
- [oss-security] 20080927 Re: CVE-2008-4113 update: kernel: sctp: fix random memory dereference with SCTP_HMAC_IDENT option mailing-list
- [linux-sctp] 20080827 [PATCH 2/2] sctp: fix random memory dereference with SCTP_HMAC_IDENT option. mailing-list
- 32315 third-party-advisory
- [oss-security] 20080926 Re: CVE-2008-4113 update: kernel: sctp: fix random memory dereference with SCTP_HMAC_IDENT option mailing-list