CVE-2023-53136

  1. Yack CVE
  2. Vulnerabilities (CVE)
  3. CVE-2023-53136

7.1 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 5.2

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

I

n the Linux kernel, the following vulnerability has been resolved: af_unix: fix struct pid leaks in OOB support syzbot reported struct pid leak [1]. Issue is that queue_oob() calls maybe_add_creds() which potentially holds a reference on a pid. But skb->destructor is not set (either directly or by calling unix_scm_to_skb()) This means that subsequent kfree_skb() or consume_skb() would leak this reference. In this fix, I chose to fully support scm even for the OOB message. [1] BUG: memory leak unreferenced object 0xffff8881053e7f80 (size 128): comm "syz-executor242", pid 5066, jiffies 4294946079 (age 13.220s) hex dump (first 32 bytes): 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<ffffffff812ae26a>] alloc_pid+0x6a/0x560 kernel/pid.c:180 [<ffffffff812718df>] copy_process+0x169f/0x26c0 kernel/fork.c:2285 [<ffffffff81272b37>] kernel_clone+0xf7/0x610 kernel/fork.c:2684 [<ffffffff812730cc>] __do_sys_clone+0x7c/0xb0 kernel/fork.c:2825 [<ffffffff849ad699>] do_syscall_x64 arch/x86/entry/common.c:50 [inline] [<ffffffff849ad699>] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 [<ffffffff84a0008b>] entry_SYSCALL_64_after_hwframe+0x63/0xcd

References
Link Resource
https://git.kernel.org/stable/c/2aab4b96900272885bc157f8b236abf1cdc02e08 Patch
https://git.kernel.org/stable/c/a59d6306263c38e5c0592ea4451ca26a0778c947 Patch
https://git.kernel.org/stable/c/ac1968ac399205fda9ee3b18f7de7416cb3a5d0d Patch
https://git.kernel.org/stable/c/f3969427fb06a2c3cd6efd7faab63505cfa76e76 Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.3:rc1:*:*:*:*:*:*
History

10 Nov 2025, 17:39

Type Values Removed Values Added
First Time Linux linux Kernel
Linux
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 7.1
References () https://git.kernel.org/stable/c/2aab4b96900272885bc157f8b236abf1cdc02e08 - () https://git.kernel.org/stable/c/2aab4b96900272885bc157f8b236abf1cdc02e08 - Patch
References () https://git.kernel.org/stable/c/a59d6306263c38e5c0592ea4451ca26a0778c947 - () https://git.kernel.org/stable/c/a59d6306263c38e5c0592ea4451ca26a0778c947 - Patch
References () https://git.kernel.org/stable/c/ac1968ac399205fda9ee3b18f7de7416cb3a5d0d - () https://git.kernel.org/stable/c/ac1968ac399205fda9ee3b18f7de7416cb3a5d0d - Patch
References () https://git.kernel.org/stable/c/f3969427fb06a2c3cd6efd7faab63505cfa76e76 - () https://git.kernel.org/stable/c/f3969427fb06a2c3cd6efd7faab63505cfa76e76 - Patch
CPE cpe:2.3:o:linux:linux_kernel:6.3:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
CWE CWE-125

05 May 2025, 20:54

Type Values Removed Values Added
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: af_unix: se corrigen fugas de struct pid en la compatibilidad OOB. syzbot reportó una fuga de struct pid [1]. El problema radica en que queue_oob() llama a perhaps_add_creds(), que potencialmente contiene una referencia a un PID. Sin embargo, skb-&gt;destructor no está definido (ni directamente ni mediante la llamada a unix_scm_to_skb()). Esto significa que las posteriores operaciones kfree_skb() o consume_skb() filtrarían esta referencia. En esta corrección, opté por ofrecer compatibilidad total con scm, incluso para el mensaje OOB. [1] ERROR: pérdida de memoria, objeto no referenciado 0xffff8881053e7f80 (tamaño 128): comunicación "syz-executor242", pid 5066, jiffies 4294946079 (edad 13.220s), volcado hexadecimal (primeros 32 bytes): 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [] alloc_pid+0x6a/0x560 kernel/pid.c:180 [] copy_process+0x169f/0x26c0 kernel/fork.c:2285 [] kernel_clone+0xf7/0x610 kernel/fork.c:2684 [] __do_sys_clone+0x7c/0xb0 kernel/fork.c:2825 [] do_syscall_x64 arch/x86/entry/common.c:50 [inline] [] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 [] entry_SYSCALL_64_after_hwframe+0x63/0xcd

02 May 2025, 16:15

Type Values Removed Values Added
New CVE
Information

Published : 2025-05-02 16:15

Updated : 2025-11-10 17:39

NVD link : CVE-2023-53136

Mitre link : CVE-2023-53136

CVE.ORG link : CVE-2023-53136

JSON object : View

Products Affected

linux

CWE
CWE-125

Out-of-bounds Read