CVE-2022-49904

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2022-49904
In the Linux kernel, the following vulnerability has been resolved: net, neigh: Fix null-ptr-deref in neigh_table_clear() When IPv6 module gets initialized but hits an error in the middle, kenel panic with: KASAN: null-ptr-deref in range [0x0000000000000598-0x000000000000059f] CPU: 1 PID: 361 Comm: insmod Hardware name: QEMU Standard PC (i440FX + PIIX, 1996) RIP: 0010:__neigh_ifdown.isra.0+0x24b/0x370 RSP: 0018:ffff888012677908 EFLAGS: 00000202 ... Call Trace: <TASK> neigh_table_clear+0x94/0x2d0 ndisc_cleanup+0x27/0x40 [ipv6] inet6_init+0x21c/0x2cb [ipv6] do_one_initcall+0xd3/0x4d0 do_init_module+0x1ae/0x670 ... Kernel panic - not syncing: Fatal exception When ipv6 initialization fails, it will try to cleanup and calls: neigh_table_clear() neigh_ifdown(tbl, NULL) pneigh_queue_purge(&tbl->proxy_queue, dev_net(dev == NULL)) # dev_net(NULL) triggers null-ptr-deref. Fix it by passing NULL to pneigh_queue_purge() in neigh_ifdown() if dev is NULL, to make kernel not panic immediately.

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

References
Link Resource
https://git.kernel.org/stable/c/0d38b4ca6679e72860ff8730e79bb99d0e9fa3b0 Patch
https://git.kernel.org/stable/c/1c89642e7f2b7ecc9635610653f5c2f0276c0051 Patch
https://git.kernel.org/stable/c/2b45d6d0c41cb9593868e476681efb1aae5078a1 Patch
https://git.kernel.org/stable/c/a99a8ec4c62180c889482a2ff6465033e0743458 Patch
https://git.kernel.org/stable/c/b49f6b2f21f543d4dc88fb7b1ec2adccb822f27c Patch
https://git.kernel.org/stable/c/b736592de2aa53aee2d48d6b129bc0c892007bbe Patch
https://git.kernel.org/stable/c/f8017317cb0b279b8ab98b0f3901a2e0ac880dad 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:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.1:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.1:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.1:rc3:*:*:*:*:*:*
History

07 May 2025, 13:30

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
CWE CWE-476
CPE cpe:2.3:o:linux:linux_kernel:6.1:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.1:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.1:rc3:*:*:*:*:*:*
First Time Linux linux Kernel
Linux
References () https://git.kernel.org/stable/c/0d38b4ca6679e72860ff8730e79bb99d0e9fa3b0 - () https://git.kernel.org/stable/c/0d38b4ca6679e72860ff8730e79bb99d0e9fa3b0 - Patch
References () https://git.kernel.org/stable/c/1c89642e7f2b7ecc9635610653f5c2f0276c0051 - () https://git.kernel.org/stable/c/1c89642e7f2b7ecc9635610653f5c2f0276c0051 - Patch
References () https://git.kernel.org/stable/c/2b45d6d0c41cb9593868e476681efb1aae5078a1 - () https://git.kernel.org/stable/c/2b45d6d0c41cb9593868e476681efb1aae5078a1 - Patch
References () https://git.kernel.org/stable/c/a99a8ec4c62180c889482a2ff6465033e0743458 - () https://git.kernel.org/stable/c/a99a8ec4c62180c889482a2ff6465033e0743458 - Patch
References () https://git.kernel.org/stable/c/b49f6b2f21f543d4dc88fb7b1ec2adccb822f27c - () https://git.kernel.org/stable/c/b49f6b2f21f543d4dc88fb7b1ec2adccb822f27c - Patch
References () https://git.kernel.org/stable/c/b736592de2aa53aee2d48d6b129bc0c892007bbe - () https://git.kernel.org/stable/c/b736592de2aa53aee2d48d6b129bc0c892007bbe - Patch
References () https://git.kernel.org/stable/c/f8017317cb0b279b8ab98b0f3901a2e0ac880dad - () https://git.kernel.org/stable/c/f8017317cb0b279b8ab98b0f3901a2e0ac880dad - Patch

02 May 2025, 13:52

Type Values Removed Values Added
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net, neigh: Fix null-ptr-deref en neigh_table_clear() Cuando se inicializa un módulo IPv6 pero se produce un error en el medio, kenel entra en pánico con: KASAN: null-ptr-deref en el rango [0x0000000000000598-0x000000000000059f] CPU: 1 PID: 361 Comm: insmod Nombre del hardware: QEMU Standard PC (i440FX + PIIX, 1996) RIP: 0010:__neigh_ifdown.isra.0+0x24b/0x370 RSP: 0018:ffff888012677908 EFLAGS: 00000202 ... Seguimiento de llamadas: neigh_table_clear+0x94/0x2d0 ndisc_cleanup+0x27/0x40 [ipv6] inet6_init+0x21c/0x2cb [ipv6] do_one_initcall+0xd3/0x4d0 do_init_module+0x1ae/0x670 ... Pánico del kernel - no sincroniza: Excepción fatal Cuando falla la inicialización de ipv6, intentará limpiar y llamará a: neigh_table_clear() neigh_ifdown(tbl, NULL) pneigh_queue_purge(&amp;tbl-&gt;proxy_queue, dev_net(dev == NULL)) # dev_net(NULL) activa null-ptr-deref. Corríjalo pasando NULL a pneigh_queue_purge() en neigh_ifdown() si dev es NULL, para que el kernel no entre en pánico inmediatamente.

01 May 2025, 15:16

Type Values Removed Values Added
New CVE
Information

Published : 2025-05-01 15:16

Updated : 2025-05-07 13:30

NVD link : CVE-2022-49904

Mitre link : CVE-2022-49904

CVE.ORG link : CVE-2022-49904

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-476

NULL Pointer Dereference