CVE-2025-21683

  1. Yack CVE
  2. Vulnerabilities (CVE)
  3. CVE-2025-21683

5.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

I

n the Linux kernel, the following vulnerability has been resolved: bpf: Fix bpf_sk_select_reuseport() memory leak As pointed out in the original comment, lookup in sockmap can return a TCP ESTABLISHED socket. Such TCP socket may have had SO_ATTACH_REUSEPORT_EBPF set before it was ESTABLISHED. In other words, a non-NULL sk_reuseport_cb does not imply a non-refcounted socket. Drop sk's reference in both error paths. unreferenced object 0xffff888101911800 (size 2048): comm "test_progs", pid 44109, jiffies 4297131437 hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 80 00 01 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace (crc 9336483b): __kmalloc_noprof+0x3bf/0x560 __reuseport_alloc+0x1d/0x40 reuseport_alloc+0xca/0x150 reuseport_attach_prog+0x87/0x140 sk_reuseport_attach_bpf+0xc8/0x100 sk_setsockopt+0x1181/0x1990 do_sock_setsockopt+0x12b/0x160 __sys_setsockopt+0x7b/0xc0 __x64_sys_setsockopt+0x1b/0x30 do_syscall_64+0x93/0x180 entry_SYSCALL_64_after_hwframe+0x76/0x7e

References
Link Resource
https://git.kernel.org/stable/c/0ab52a8ca6e156a64c51b5e7456cac9a0ebfd9bf Patch
https://git.kernel.org/stable/c/b02e70be498b138e9c21701c2f33f4018ca7cd5e Patch
https://git.kernel.org/stable/c/b3af60928ab9129befa65e6df0310d27300942bf Patch
https://git.kernel.org/stable/c/bb36838dac7bb334a3f3d7eb29875593ec9473fc Patch
https://git.kernel.org/stable/c/cccd51dd22574216e64e5d205489e634f86999f3 Patch
https://git.kernel.org/stable/c/d0a3b3d1176d39218b8edb2a2d03164942ab9ccd Patch
https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html
https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html
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:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.13:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.13:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.13:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.13:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.13:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.13:rc6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.13:rc7:*:*:*:*:*:*
History

03 Nov 2025, 21:19

Type Values Removed Values Added
References
  • () https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html -
  • () https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html -

03 Feb 2025, 20:01

Type Values Removed Values Added
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: bpf: Se solucionó la pérdida de memoria de bpf_sk_select_reuseport() Como se señaló en el comentario original, la búsqueda en sockmap puede devolver un socket TCP ESTABLISHED. Es posible que dicho socket TCP haya tenido SO_ATTACH_REUSEPORT_EBPF configurado antes de que se estableciera. En otras palabras, un sk_reuseport_cb que no sea NULL no implica un socket sin referencia. Elimine la referencia de sk en ambas rutas de error. objeto sin referencia 0xffff888101911800 (tamaño 2048): comm "test_progs", pid 44109, jiffies 4297131437 volcado hexadecimal (primeros 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 80 00 01 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ seguimiento inverso (crc 9336483b): __kmalloc_noprof+0x3bf/0x560 __reuseport_alloc+0x1d/0x40 reuseport_alloc+0xca/0x150 reuseport_attach_prog+0x87/0x140 sk_reuseport_attach_bpf+0xc8/0x100 sk_setsockopt+0x1181/0x1990 do_sock_setsockopt+0x12b/0x160 __sys_setsockopt+0x7b/0xc0 __x64_sys_setsockopt+0x1b/0x30 do_syscall_64+0x93/0x180 entrada_SYSCALL_64_después_hwframe+0x76/0x7e
References () https://git.kernel.org/stable/c/0ab52a8ca6e156a64c51b5e7456cac9a0ebfd9bf - () https://git.kernel.org/stable/c/0ab52a8ca6e156a64c51b5e7456cac9a0ebfd9bf - Patch
References () https://git.kernel.org/stable/c/b02e70be498b138e9c21701c2f33f4018ca7cd5e - () https://git.kernel.org/stable/c/b02e70be498b138e9c21701c2f33f4018ca7cd5e - Patch
References () https://git.kernel.org/stable/c/b3af60928ab9129befa65e6df0310d27300942bf - () https://git.kernel.org/stable/c/b3af60928ab9129befa65e6df0310d27300942bf - Patch
References () https://git.kernel.org/stable/c/bb36838dac7bb334a3f3d7eb29875593ec9473fc - () https://git.kernel.org/stable/c/bb36838dac7bb334a3f3d7eb29875593ec9473fc - Patch
References () https://git.kernel.org/stable/c/cccd51dd22574216e64e5d205489e634f86999f3 - () https://git.kernel.org/stable/c/cccd51dd22574216e64e5d205489e634f86999f3 - Patch
References () https://git.kernel.org/stable/c/d0a3b3d1176d39218b8edb2a2d03164942ab9ccd - () https://git.kernel.org/stable/c/d0a3b3d1176d39218b8edb2a2d03164942ab9ccd - Patch
First Time Linux linux Kernel
Linux
CPE cpe:2.3:o:linux:linux_kernel:6.13:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.13:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.13:rc7:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.13:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.13:rc6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.13:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.13:rc4:*:*:*:*:*:*
CWE CWE-401
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5

02 Feb 2025, 11:15

Type Values Removed Values Added
References
  • () https://git.kernel.org/stable/c/bb36838dac7bb334a3f3d7eb29875593ec9473fc -

31 Jan 2025, 12:15

Type Values Removed Values Added
New CVE
Information

Published : 2025-01-31 12:15

Updated : 2025-11-03 21:19

NVD link : CVE-2025-21683

Mitre link : CVE-2025-21683

CVE.ORG link : CVE-2025-21683

JSON object : View

Products Affected

linux

CWE
CWE-401

Missing Release of Memory after Effective Lifetime