CVE-2026-23172

MEDIUM EPSS 3.4%
Published Feb 14, 20264mo ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Feb 14, 2026 4mo ago
Last Modified Jun 17, 2026 2w ago

Description

In the Linux kernel, the following vulnerability has been resolved: net: wwan: t7xx: fix potential skb->frags overflow in RX path When receiving data in the DPMAIF RX path, the t7xx_dpmaif_set_frag_to_skb() function adds page fragments to an skb without checking if the number of fragments has exceeded MAX_SKB_FRAGS. This could lead to a buffer overflow in skb_shinfo(skb)->frags[] array, corrupting adjacent memory and potentially causing kernel crashes or other undefined behavior. This issue was identified through static code analysis by comparing with a similar vulnerability fixed in the mt76 driver commit b102f0c522cf ("mt76: fix array overflow on receiving too many fragments for a packet"). The vulnerability could be triggered if the modem firmware sends packets with excessive fragments. While under normal protocol conditions (MTU 3080 bytes, BAT buffer 3584 bytes), a single packet should not require additional fragments, the kernel should not blindly trust firmware behavior. Malicious, buggy, or compromised firmware could potentially craft packets with more fragments than the kernel expects. Fix this by adding a bounds check before calling skb_add_rx_frag() to ensure nr_frags does not exceed MAX_SKB_FRAGS. The check must be performed before unmapping to avoid a page leak and double DMA unmap during device teardown.

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
3.4% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-401

Affected Products 11

VendorProductVersionRange
linuxlinux_kernel*≥5.19  –  <6.1.162
linuxlinux_kernel*≥6.2  –  <6.6.123
linuxlinux_kernel*≥6.7  –  <6.12.69
linuxlinux_kernel*≥6.13  –  <6.18.9
linuxlinux_kernel6.19any
linuxlinux_kernel6.19any
linuxlinux_kernel6.19any
linuxlinux_kernel6.19any
linuxlinux_kernel6.19any
linuxlinux_kernel6.19any
linuxlinux_kernel6.19any

References 5

  • git.kernel.org https://git.kernel.org/stable/c/2a0522f564acd34442652ea083091c329fa7c5d5
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/2c0fb0f60bc1545c52da61bc6bd4855c1e7814ba
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/af4b8577d0b388cc3d0039eb0cdd9ca5bbbc9276
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f0813bcd2d9d97fdbdf2efb9532ab03ae92e99e6
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f9747a7521a48afded5bff2faf1f2dcfff48c577
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/2a0522f564acd34442652ea083091c329fa7c5d5
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/2c0fb0f60bc1545c52da61bc6bd4855c1e7814ba
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/af4b8577d0b388cc3d0039eb0cdd9ca5bbbc9276
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f0813bcd2d9d97fdbdf2efb9532ab03ae92e99e6
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f9747a7521a48afded5bff2faf1f2dcfff48c577
    Patch