Memory Leak Affecting kernel-uek-doc package, versions <0:6.12.0-200.74.27.el9uek
Threat Intelligence
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Test your applications- Snyk IDSNYK-ORACLE9-KERNELUEKDOC-15865941
- published1 Apr 2026
- disclosed4 Feb 2026
Introduced: 4 Feb 2026
CVE-2026-23072 (opens in a new tab)How to fix?
Upgrade Oracle:9 kernel-uek-doc to version 0:6.12.0-200.74.27.el9uek or higher.
This issue was patched in ELSA-2026-50160.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-uek-doc package and not the kernel-uek-doc package as distributed by Oracle.
See How to fix? for Oracle:9 relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
l2tp: Fix memleak in l2tp_udp_encap_recv().
syzbot reported memleak of struct l2tp_session, l2tp_tunnel, sock, etc. [0]
The cited commit moved down the validation of the protocol version in l2tp_udp_encap_recv().
The new place requires an extra error handling to avoid the memleak.
Let's call l2tp_session_put() there.
[0]: BUG: memory leak unreferenced object 0xffff88810a290200 (size 512): comm "syz.0.17", pid 6086, jiffies 4294944299 hex dump (first 32 bytes): 7d eb 04 0c 00 00 00 00 01 00 00 00 00 00 00 00 }............... 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace (crc babb6a4f): kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline] slab_post_alloc_hook mm/slub.c:4958 [inline] slab_alloc_node mm/slub.c:5263 [inline] __do_kmalloc_node mm/slub.c:5656 [inline] __kmalloc_noprof+0x3e0/0x660 mm/slub.c:5669 kmalloc_noprof include/linux/slab.h:961 [inline] kzalloc_noprof include/linux/slab.h:1094 [inline] l2tp_session_create+0x3a/0x3b0 net/l2tp/l2tp_core.c:1778 pppol2tp_connect+0x48b/0x920 net/l2tp/l2tp_ppp.c:755 __sys_connect_file+0x7a/0xb0 net/socket.c:2089 __sys_connect+0xde/0x110 net/socket.c:2108 __do_sys_connect net/socket.c:2114 [inline] __se_sys_connect net/socket.c:2111 [inline] __x64_sys_connect+0x1c/0x30 net/socket.c:2111 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xa4/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f
References
- https://linux.oracle.com/cve/CVE-2026-23072.html
- https://linux.oracle.com/errata/ELSA-2026-50160.html
- https://git.kernel.org/stable/c/4d10edfd1475b69dbd4c47f34b61a3772ece83ca
- https://git.kernel.org/stable/c/5cd158a88eef34e7b100cd9b963873d3b4e41b35
- https://git.kernel.org/stable/c/d4ce79e6dce2a4a49eebceea7b4caf5dc0f0ef3d