CVE-2023-53679

MEDIUM EPSS 3.8%
Published Oct 7, 20258mo ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Oct 7, 2025 8mo ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: mt7601u: fix an integer underflow Fix an integer underflow that leads to a null pointer dereference in 'mt7601u_rx_skb_from_seg()'. The variable 'dma_len' in the URB packet could be manipulated, which could trigger an integer underflow of 'seg_len' in 'mt7601u_rx_process_seg()'. This underflow subsequently causes the 'bad_frame' checks in 'mt7601u_rx_skb_from_seg()' to be bypassed, eventually leading to a dereference of the pointer 'p', which is a null pointer. Ensure that 'dma_len' is greater than 'min_seg_len'. Found by a modified version of syzkaller. KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] CPU: 0 PID: 12 Comm: ksoftirqd/0 Tainted: G W O 5.14.0+ #139 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.1-0-ga5cab58e9a3f-prebuilt.qemu.org 04/01/2014 RIP: 0010:skb_add_rx_frag+0x143/0x370 Code: e2 07 83 c2 03 38 ca 7c 08 84 c9 0f 85 86 01 00 00 4c 8d 7d 08 44 89 68 08 48 b8 00 00 00 00 00 fc ff df 4c 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 cd 01 00 00 48 8b 45 08 a8 01 0f 85 3d 01 00 00 RSP: 0018:ffffc900000cfc90 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffff888115520dc0 RCX: 0000000000000000 RDX: 0000000000000001 RSI: ffff8881118430c0 RDI: ffff8881118430f8 RBP: 0000000000000000 R08: 0000000000000e09 R09: 0000000000000010 R10: ffff888111843017 R11: ffffed1022308602 R12: 0000000000000000 R13: 0000000000000e09 R14: 0000000000000010 R15: 0000000000000008 FS: 0000000000000000(0000) GS:ffff88811a800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000004035af40 CR3: 00000001157f2000 CR4: 0000000000750ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 PKRU: 55555554 Call Trace: mt7601u_rx_tasklet+0xc73/0x1270 ? mt7601u_submit_rx_buf.isra.0+0x510/0x510 ? tasklet_action_common.isra.0+0x79/0x2f0 tasklet_action_common.isra.0+0x206/0x2f0 __do_softirq+0x1b5/0x880 ? tasklet_unlock+0x30/0x30 run_ksoftirqd+0x26/0x50 smpboot_thread_fn+0x34f/0x7d0 ? smpboot_register_percpu_thread+0x370/0x370 kthread+0x3a1/0x480 ? set_kthread_struct+0x120/0x120 ret_from_fork+0x1f/0x30 Modules linked in: 88XXau(O) 88x2bu(O) ---[ end trace 57f34f93b4da0f9b ]--- RIP: 0010:skb_add_rx_frag+0x143/0x370 Code: e2 07 83 c2 03 38 ca 7c 08 84 c9 0f 85 86 01 00 00 4c 8d 7d 08 44 89 68 08 48 b8 00 00 00 00 00 fc ff df 4c 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 cd 01 00 00 48 8b 45 08 a8 01 0f 85 3d 01 00 00 RSP: 0018:ffffc900000cfc90 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffff888115520dc0 RCX: 0000000000000000 RDX: 0000000000000001 RSI: ffff8881118430c0 RDI: ffff8881118430f8 RBP: 0000000000000000 R08: 0000000000000e09 R09: 0000000000000010 R10: ffff888111843017 R11: ffffed1022308602 R12: 0000000000000000 R13: 0000000000000e09 R14: 0000000000000010 R15: 0000000000000008 FS: 0000000000000000(0000) GS:ffff88811a800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000004035af40 CR3: 00000001157f2000 CR4: 0000000000750ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 PKRU: 55555554

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
3.8% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-191

Affected Products 5

VendorProductVersionRange
linuxlinux_kernel*≥4.2  –  <5.4.235
linuxlinux_kernel*≥5.5  –  <5.10.173
linuxlinux_kernel*≥5.11  –  <5.15.99
linuxlinux_kernel*≥5.16  –  <6.1.16
linuxlinux_kernel*≥6.2  –  <6.2.3

References 6

  • git.kernel.org https://git.kernel.org/stable/c/1a1f43059afae5cc9409e0c3bc63bfc09bc8facb
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/47dc1f425af57b71111d7b01ebd24e04e8d967ef
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/61d0163e2be7a439cf6f82e9ad7de563ecf41e7a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/67e4519afba215199b6dfa39ce5d7ea673ee4138
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/803f3176c5df3b5582c27ea690f204abb60b19b9
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d0db59e2f718d1e2f1d2a2d8092168fdd2f3add0
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/1a1f43059afae5cc9409e0c3bc63bfc09bc8facb
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/47dc1f425af57b71111d7b01ebd24e04e8d967ef
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/61d0163e2be7a439cf6f82e9ad7de563ecf41e7a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/67e4519afba215199b6dfa39ce5d7ea673ee4138
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/803f3176c5df3b5582c27ea690f204abb60b19b9
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d0db59e2f718d1e2f1d2a2d8092168fdd2f3add0
    Patch