CVE-2022-49532

MEDIUM EPSS 22.4%
Published Feb 26, 20251y ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Feb 26, 2025 1y ago
Last Modified Jun 17, 2026 2w ago

Description

In the Linux kernel, the following vulnerability has been resolved: drm/virtio: fix NULL pointer dereference in virtio_gpu_conn_get_modes drm_cvt_mode may return NULL and we should check it. This bug is found by syzkaller: FAULT_INJECTION stacktrace: [ 168.567394] FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 1 [ 168.567403] CPU: 1 PID: 6425 Comm: syz Kdump: loaded Not tainted 4.19.90-vhulk2201.1.0.h1035.kasan.eulerosv2r10.aarch64 #1 [ 168.567406] Hardware name: QEMU KVM Virtual Machine, BIOS 0.0.0 02/06/2015 [ 168.567408] Call trace: [ 168.567414] dump_backtrace+0x0/0x310 [ 168.567418] show_stack+0x28/0x38 [ 168.567423] dump_stack+0xec/0x15c [ 168.567427] should_fail+0x3ac/0x3d0 [ 168.567437] __should_failslab+0xb8/0x120 [ 168.567441] should_failslab+0x28/0xc0 [ 168.567445] kmem_cache_alloc_trace+0x50/0x640 [ 168.567454] drm_mode_create+0x40/0x90 [ 168.567458] drm_cvt_mode+0x48/0xc78 [ 168.567477] virtio_gpu_conn_get_modes+0xa8/0x140 [virtio_gpu] [ 168.567485] drm_helper_probe_single_connector_modes+0x3a4/0xd80 [ 168.567492] drm_mode_getconnector+0x2e0/0xa70 [ 168.567496] drm_ioctl_kernel+0x11c/0x1d8 [ 168.567514] drm_ioctl+0x558/0x6d0 [ 168.567522] do_vfs_ioctl+0x160/0xf30 [ 168.567525] ksys_ioctl+0x98/0xd8 [ 168.567530] __arm64_sys_ioctl+0x50/0xc8 [ 168.567536] el0_svc_common+0xc8/0x320 [ 168.567540] el0_svc_handler+0xf8/0x160 [ 168.567544] el0_svc+0x10/0x218 KASAN stacktrace: [ 168.567561] BUG: KASAN: null-ptr-deref in virtio_gpu_conn_get_modes+0xb4/0x140 [virtio_gpu] [ 168.567565] Read of size 4 at addr 0000000000000054 by task syz/6425 [ 168.567566] [ 168.567571] CPU: 1 PID: 6425 Comm: syz Kdump: loaded Not tainted 4.19.90-vhulk2201.1.0.h1035.kasan.eulerosv2r10.aarch64 #1 [ 168.567573] Hardware name: QEMU KVM Virtual Machine, BIOS 0.0.0 02/06/2015 [ 168.567575] Call trace: [ 168.567578] dump_backtrace+0x0/0x310 [ 168.567582] show_stack+0x28/0x38 [ 168.567586] dump_stack+0xec/0x15c [ 168.567591] kasan_report+0x244/0x2f0 [ 168.567594] __asan_load4+0x58/0xb0 [ 168.567607] virtio_gpu_conn_get_modes+0xb4/0x140 [virtio_gpu] [ 168.567612] drm_helper_probe_single_connector_modes+0x3a4/0xd80 [ 168.567617] drm_mode_getconnector+0x2e0/0xa70 [ 168.567621] drm_ioctl_kernel+0x11c/0x1d8 [ 168.567624] drm_ioctl+0x558/0x6d0 [ 168.567628] do_vfs_ioctl+0x160/0xf30 [ 168.567632] ksys_ioctl+0x98/0xd8 [ 168.567636] __arm64_sys_ioctl+0x50/0xc8 [ 168.567641] el0_svc_common+0xc8/0x320 [ 168.567645] el0_svc_handler+0xf8/0x160 [ 168.567649] el0_svc+0x10/0x218

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
22.4% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-476 NULL Pointer Dereference Memory Safety

Affected Products 8

VendorProductVersionRange
linuxlinux_kernel* <4.9.318
linuxlinux_kernel*≥4.10  –  <4.14.283
linuxlinux_kernel*≥4.15  –  <4.19.247
linuxlinux_kernel*≥4.20  –  <5.4.198
linuxlinux_kernel*≥5.5  –  <5.10.121
linuxlinux_kernel*≥5.11  –  <5.15.46
linuxlinux_kernel*≥5.16  –  <5.17.14
linuxlinux_kernel*≥5.18  –  <5.18.3

References 9

  • git.kernel.org https://git.kernel.org/stable/c/0f8bc147a963686b7351aa35d1701124ffacac08
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/194d250cdc4a40ccbd179afd522a9e9846957402
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/32e10aabc287f09a148ff759bb9ce70b01b0012c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/848dd072744ea662ab3097e3c8282bee552df218
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c51d00472fa54b9b05c17789ed665c17adf3a25d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e0828456578cc8ba0a69147f7ae3428392eec287
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/edafcad84c4134ebec4bc24b29ca4497a1184eea
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f85cb059fad03a3b33a50023be91e944bb065ae8
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/fadc626cae99aaa1325094edc6a9e2b883f3e562
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/0f8bc147a963686b7351aa35d1701124ffacac08
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/194d250cdc4a40ccbd179afd522a9e9846957402
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/32e10aabc287f09a148ff759bb9ce70b01b0012c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/848dd072744ea662ab3097e3c8282bee552df218
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c51d00472fa54b9b05c17789ed665c17adf3a25d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e0828456578cc8ba0a69147f7ae3428392eec287
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/edafcad84c4134ebec4bc24b29ca4497a1184eea
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f85cb059fad03a3b33a50023be91e944bb065ae8
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/fadc626cae99aaa1325094edc6a9e2b883f3e562
    Patch