Description
The krb5_gss_process_context_token function in lib/gssapi/krb5/process_context_token.c in the libgssapi_krb5 library in MIT Kerberos 5 (aka krb5) through 1.11.5, 1.12.x through 1.12.2, and 1.13.x before 1.13.1 does not properly maintain security-context handles, which allows remote authenticated users to cause a denial of service (use-after-free and double free, and daemon crash) or possibly execute arbitrary code via crafted GSSAPI traffic, as demonstrated by traffic to kadmind.
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 | krb5 | 1.12.1+dfsg-17 | — |
| Debian 13 | krb5 | 1.12.1+dfsg-17 | — |
| Debian 12 | krb5 | 1.12.1+dfsg-17 | — |
| Debian 7 | krb5 | 1.10.1+dfsg-5+deb7u3 | DSA-3153-1 |
| Debian 6.0 | krb5 | 1.8.3+dfsg-4squeeze9 | DLA-146-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | krb5 | 1.12+dfsg-2ubuntu5.1 | USN-2498-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | krb5 +6 | 1.12.2-14.el7 | RHSA-2015:0439 |
| RHEL 6 | krb5 +6 | 1.10.3-37.el6_6 | RHSA-2015:0794 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 | krb5 | 1.12.1-9.1 | SUSE-SU-2015:0290-2, SUSE-SU-2015:0290-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 | krb5 | 1.12.1-9.1 | SUSE-SU-2015:0290-2, SUSE-SU-2015:0290-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | krb5 | 1.15-1.1 | openSUSE-SU-2024:10004-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | krb5-libs +5 | 1.12.2-14.el7 | ELSA-2015-0439 |
Advisories 9
- RHSA-2015:0794 Red Hat Security Advisory: krb5 security update Red Hat Security Advisories (RHSA) · Aug 5, 2026
- RHSA-2015:0439 Red Hat Security Advisory: krb5 security, bug fix and enhancement update Red Hat Security Advisories (RHSA) · Aug 5, 2026
- USN-2498-1 krb5 vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-3153-1 krb5 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-146-1 krb5 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:10004-1 krb5-1.15-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2015:0290-2 Security update for krb5 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2015:0290-1 Security update for krb5 SUSE / openSUSE Security Updates · Feb 4, 2026
- ELSA-2015-0439 Moderate: krb5 security, bug fix and enhancement update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Mar 11, 2015
References
- FEDORA-2015-2347 vendor-advisory
- http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2015-001.txt
- RHSA-2015:0794 vendor-advisory
- FEDORA-2015-2382 vendor-advisory
- DSA-3153 vendor-advisory
- openSUSE-SU-2015:0255 vendor-advisory
- RHSA-2015:0439 vendor-advisory
- SUSE-SU-2015:0290 vendor-advisory
- MDVSA-2015:069 vendor-advisory
- USN-2498-1 vendor-advisory
- SUSE-SU-2015:0257 vendor-advisory
- 72495 vdb-entry
- https://github.com/krb5/krb5/commit/82dc33da50338ac84c7b4102dc6513d897d0506a
- http://web.mit.edu/kerberos/advisories/2015-001-patch-r113.txt