CVE-2022-49916

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2022-49916
In the Linux kernel, the following vulnerability has been resolved: rose: Fix NULL pointer dereference in rose_send_frame() The syzkaller reported an issue: KASAN: null-ptr-deref in range [0x0000000000000380-0x0000000000000387] CPU: 0 PID: 4069 Comm: kworker/0:15 Not tainted 6.0.0-syzkaller-02734-g0326074ff465 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 Workqueue: rcu_gp srcu_invoke_callbacks RIP: 0010:rose_send_frame+0x1dd/0x2f0 net/rose/rose_link.c:101 Call Trace: <IRQ> rose_transmit_clear_request+0x1d5/0x290 net/rose/rose_link.c:255 rose_rx_call_request+0x4c0/0x1bc0 net/rose/af_rose.c:1009 rose_loopback_timer+0x19e/0x590 net/rose/rose_loopback.c:111 call_timer_fn+0x1a0/0x6b0 kernel/time/timer.c:1474 expire_timers kernel/time/timer.c:1519 [inline] __run_timers.part.0+0x674/0xa80 kernel/time/timer.c:1790 __run_timers kernel/time/timer.c:1768 [inline] run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1803 __do_softirq+0x1d0/0x9c8 kernel/softirq.c:571 [...] </IRQ> It triggers NULL pointer dereference when 'neigh->dev->dev_addr' is called in the rose_send_frame(). It's the first occurrence of the `neigh` is in rose_loopback_timer() as `rose_loopback_neigh', and the 'dev' in 'rose_loopback_neigh' is initialized sa nullptr. It had been fixed by commit 3b3fd068c56e3fbea30090859216a368398e39bf ("rose: Fix Null pointer dereference in rose_send_frame()") ever. But it's introduced by commit 3c53cd65dece47dd1f9d3a809f32e59d1d87b2b8 ("rose: check NULL rose_loopback_neigh->loopback") again. We fix it by add NULL check in rose_transmit_clear_request(). When the 'dev' in 'neigh' is NULL, we don't reply the request and just clear it. syzkaller don't provide repro, and I provide a syz repro like: r0 = syz_init_net_socket$bt_sco(0x1f, 0x5, 0x2) ioctl$sock_inet_SIOCSIFFLAGS(r0, 0x8914, &(0x7f0000000180)={'rose0\x00', 0x201}) r1 = syz_init_net_socket$rose(0xb, 0x5, 0x0) bind$rose(r1, &(0x7f00000000c0)=@full={0xb, @dev, @null, 0x0, [@null, @null, @netrom, @netrom, @default, @null]}, 0x40) connect$rose(r1, &(0x7f0000000240)=@short={0xb, @dev={0xbb, 0xbb, 0xbb, 0x1, 0x0}, @remote={0xcc, 0xcc, 0xcc, 0xcc, 0xcc, 0xcc, 0x1}, 0x1, @netrom={0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0x0, 0x0}}, 0x1c)

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/01b9c68c121847d05a4ccef68244dadf82bfa331 Patch
https://git.kernel.org/stable/c/3e2129c67daca21043a26575108f6286c85e71f6 Patch
https://git.kernel.org/stable/c/5b46adfbee1e429f33b10a88d6c00fa88f3d6c77 Patch
https://git.kernel.org/stable/c/a601e5eded33bb88b8a42743db8fef3ad41dd97e Patch
https://git.kernel.org/stable/c/b13be5e852b03f376058027e462fad4230240891 Patch
https://git.kernel.org/stable/c/bbc03d74e641e824754443b908454ca9e203773e Patch
https://git.kernel.org/stable/c/e97c089d7a49f67027395ddf70bf327eeac2611e Patch
https://git.kernel.org/stable/c/f06186e5271b980bac03f5c97276ed0146ddc9b0 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:*:*:*:*:*:*:*:*
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, 13:27

Type Values Removed Values Added
References () https://git.kernel.org/stable/c/01b9c68c121847d05a4ccef68244dadf82bfa331 - () https://git.kernel.org/stable/c/01b9c68c121847d05a4ccef68244dadf82bfa331 - Patch
References () https://git.kernel.org/stable/c/3e2129c67daca21043a26575108f6286c85e71f6 - () https://git.kernel.org/stable/c/3e2129c67daca21043a26575108f6286c85e71f6 - Patch
References () https://git.kernel.org/stable/c/5b46adfbee1e429f33b10a88d6c00fa88f3d6c77 - () https://git.kernel.org/stable/c/5b46adfbee1e429f33b10a88d6c00fa88f3d6c77 - Patch
References () https://git.kernel.org/stable/c/a601e5eded33bb88b8a42743db8fef3ad41dd97e - () https://git.kernel.org/stable/c/a601e5eded33bb88b8a42743db8fef3ad41dd97e - Patch
References () https://git.kernel.org/stable/c/b13be5e852b03f376058027e462fad4230240891 - () https://git.kernel.org/stable/c/b13be5e852b03f376058027e462fad4230240891 - Patch
References () https://git.kernel.org/stable/c/bbc03d74e641e824754443b908454ca9e203773e - () https://git.kernel.org/stable/c/bbc03d74e641e824754443b908454ca9e203773e - Patch
References () https://git.kernel.org/stable/c/e97c089d7a49f67027395ddf70bf327eeac2611e - () https://git.kernel.org/stable/c/e97c089d7a49f67027395ddf70bf327eeac2611e - Patch
References () https://git.kernel.org/stable/c/f06186e5271b980bac03f5c97276ed0146ddc9b0 - () https://git.kernel.org/stable/c/f06186e5271b980bac03f5c97276ed0146ddc9b0 - Patch
CWE CWE-476
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
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

02 May 2025, 13:52

Type Values Removed Values Added
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: rose: Se corrige la desreferencia del puntero NULL en rose_send_frame() Syzkaller informó un problema: KASAN: null-ptr-deref en el rango [0x0000000000000380-0x0000000000000387] CPU: 0 PID: 4069 Comm: kworker/0:15 No contaminado 6.0.0-syzkaller-02734-g0326074ff465 #0 Nombre del hardware: Google Google Compute Engine/Google Compute Engine, BIOS Google 22/09/2022 Cola de trabajo: rcu_gp srcu_invoke_callbacks RIP: 0010:rose_send_frame+0x1dd/0x2f0 net/rose/rose_link.c:101 Rastreo de llamadas: rose_transmit_clear_request+0x1d5/0x290 net/rose/rose_link.c:255 rose_rx_call_request+0x4c0/0x1bc0 net/rose/af_rose.c:1009 rose_loopback_timer+0x19e/0x590 net/rose/rose_loopback.c:111 call_timer_fn+0x1a0/0x6b0 kernel/time/timer.c:1474 expire_timers kernel/time/timer.c:1519 [en línea] __run_timers.part.0+0x674/0xa80 kernel/time/timer.c:1790 __run_timers kernel/time/timer.c:1768 [en línea] run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1803 __do_softirq+0x1d0/0x9c8 kernel/softirq.c:571 [...] Activa la desreferencia de puntero nulo cuando se llama a 'neigh-&gt;dev-&gt;dev_addr' en rose_send_frame(). Es la primera vez que `neigh` aparece en rose_loopback_timer() como `rose_loopback_neigh', y `dev' en `rose_loopback_neigh' se inicializa como nullptr. Se corrigió con el commit 3b3fd068c56e3fbea30090859216a368398e39bf ("rose: Corregir la desreferencia de puntero nulo en rose_send_frame()"). Pero esto se introduce de nuevo con el commit 3c53cd65dece47dd1f9d3a809f32e59d1d87b2b8 ("rose: check NULL rose_loopback_neigh-&gt;loopback"). Lo solucionamos añadiendo una comprobación NULL en rose_transmit_clear_request(). Cuando el valor de "dev" en "neigh" es NULL, no respondemos a la solicitud y simplemente la borramos. syzkaller no proporciona reproducción, y yo proporciono una reproducción syz como: r0 = syz_init_net_socket$bt_sco(0x1f, 0x5, 0x2) ioctl$sock_inet_SIOCSIFFLAGS(r0, 0x8914, &amp;(0x7f0000000180)={'rose0\x00', 0x201}) r1 = syz_init_net_socket$rose(0xb, 0x5, 0x0) bind$rose(r1, &amp;(0x7f00000000c0)=@full={0xb, @dev, @null, 0x0, [@null, @null, @netrom, @netrom, @default, @null]}, 0x40) conectar$rosa(r1, &amp;(0x7f0000000240)=@corto={0xb, @dev={0xbb, 0xbb, 0xbb, 0x1, 0x0}, @remoto={0xcc, 0xcc, 0xcc, 0xcc, 0xcc, 0xcc, 0x1}, 0x1, @netrom={0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0x0, 0x0}}, 0x1c)

01 May 2025, 15:16

Type Values Removed Values Added
New CVE
Information

Published : 2025-05-01 15:16

Updated : 2025-05-07 13:27

NVD link : CVE-2022-49916

Mitre link : CVE-2022-49916

CVE.ORG link : CVE-2022-49916

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-476

NULL Pointer Dereference