[17220] in Kerberos-V5-bugs
[krbdev.mit.edu #9246] git commit
daemon@ATHENA.MIT.EDU (Greg Hudson via RT)
Mon Nov 9 12:01:53 2026
From: "Greg Hudson via RT" <rt@krbdev.mit.edu>
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Date: Mon, 09 Nov 2026 12:01:07 -0500
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<URL: https://krbdev.mit.edu/rt/Ticket/Display.html?id=9246 >
Free call_arg on all AUTH_GSSAPI exit paths
In gssrpc__svcauth_gssapi(), ensure that call_arg is released along
all exit paths by freeing it in the error handler.
CVE-2026-112321:
The AUTH_GSSAPI handler in lib/rpc/svc_auth_gssapi.c in MIT Kerberos 5
(aka krb5) does not free decoded arguments on certain error paths,
which allows remote attackers to cause a denial of service (memory
exhaustion in kadmind) via crafted AUTH_GSSAPI_INIT requests that
trigger authentication failures.
(cherry picked from commit 89ea06778fe893a8fdad483f7716fe8309521603)
https://github.com/krb5/krb5/commit/93cb29865df33972c54d8b124123973856513f6f
Author: Julien Rische <jrische@redhat.com>
Committer: Greg Hudson <ghudson@mit.edu>
Commit: 93cb29865df33972c54d8b124123973856513f6f
Branch: krb5-1.22
src/lib/rpc/svc_auth_gssapi.c | 9 ++++-----
1 file changed, 4 insertions(+), 5 deletions(-)
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