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CVE-2025-68362— wifi: rtl818x: rtl8187: Fix potential buffer underflow in rtl8187_rx_cb()

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于未验证数据包长度，可能导致缓冲区下溢。

AI Predicted 5.5 Difficulty: Easy EPSS 0.21% · P11

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 6f7853f3cbe457067e9fe05461f56c7ea4ac488c< 118e12bf3e4288cf845cd3759bd9d4c99f91aab5 affected
6f7853f3cbe457067e9fe05461f56c7ea4ac488c< 6a96bd0d94305fd04a6ac64446ec113bae289384 affected
6f7853f3cbe457067e9fe05461f56c7ea4ac488c< e2f3ea15e804607e0a4a34a2f6c331c8750b68bc affected
6f7853f3cbe457067e9fe05461f56c7ea4ac488c< dc153401fb26c1640a2b279c47b65e1c416af276 affected
6f7853f3cbe457067e9fe05461f56c7ea4ac488c< 4758770a673c60d8f615809304d72e1432fa6355 affected
6f7853f3cbe457067e9fe05461f56c7ea4ac488c< 638d4148e166d114a4cd7becaae992ce1a815ed8 affected
6f7853f3cbe457067e9fe05461f56c7ea4ac488c< 5ebf0fe7eaef9f6173a4c6ea77c5353e21645d15 affected
6f7853f3cbe457067e9fe05461f56c7ea4ac488c< b647d2574e4583c2e3b0ab35568f60c88e910840 affected
… +10 more rows
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I. Basic Information for CVE-2025-68362

Vulnerability Information
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Vulnerability Title
wifi: rtl818x: rtl8187: Fix potential buffer underflow in rtl8187_rx_cb()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: wifi: rtl818x: rtl8187: Fix potential buffer underflow in rtl8187_rx_cb() The rtl8187_rx_cb() calculates the rx descriptor header address by subtracting its size from the skb tail pointer. However, it does not validate if the received packet (skb->len from urb->actual_length) is large enough to contain this header. If a truncated packet is received, this will lead to a buffer underflow, reading memory before the start of the skb data area, and causing a kernel panic. Add length checks for both rtl8187 and rtl8187b descriptor headers before attempting to access them, dropping the packet cleanly if the check fails.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于未验证数据包长度，可能导致缓冲区下溢。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 6f7853f3cbe457067e9fe05461f56c7ea4ac488c ~ 118e12bf3e4288cf845cd3759bd9d4c99f91aab5 -
Linux Linux 2.6.27 -

II. Public POCs for CVE-2025-68362

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III. Intelligence Information for CVE-2025-68362

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Other References for CVE-2025-68362 (1)

Same Patch Batch · Linux · 2025-12-24 · 322 CVEs total

CVE-2025-68741 9.8 CRITICAL scsi: qla2xxx: Fix improper freeing of purex item
CVE-2025-68745 9.8 CRITICAL scsi: qla2xxx: Clear cmds after chip reset
CVE-2022-50717 9.8 CRITICAL nvmet-tcp: add bounds check on Transfer Tag
CVE-2023-54090 9.8 CRITICAL ixgbe: Fix panic during XDP_TX with > 64 CPUs
CVE-2023-54094 9.8 CRITICAL net: prevent skb corruption on frag list segmentation
CVE-2023-53867 9.8 CRITICAL ceph: fix potential use-after-free bug when trimming caps
CVE-2025-68359 9.8 CRITICAL btrfs: fix double free of qgroup record after failure to add delayed ref head
CVE-2025-68726 9.8 CRITICAL crypto: aead - Fix reqsize handling
CVE-2023-54076 9.8 CRITICAL smb: client: fix missed ses refcounting
CVE-2023-53996 9.3 CRITICAL x86/sev: Make enc_dec_hypercall() accept a size instead of npages
CVE-2023-54071 8.8 HIGH wifi: rtw88: use work to update rate to avoid RCU warning
CVE-2025-68736 8.8 HIGH landlock: Fix handling of disconnected directories
CVE-2023-54040 8.8 HIGH ice: fix wrong fallback logic for FDIR
CVE-2023-54092 8.8 HIGH KVM: s390: pv: fix index value of replaced ASCE
CVE-2022-50732 8.8 HIGH staging: rtl8192u: Fix use after free in ieee80211_rx()
CVE-2023-54043 8.8 HIGH iommufd: Do not add the same hwpt to the ioas->hwpt_list twice
CVE-2023-54120 8.8 HIGH Bluetooth: Fix race condition in hidp_session_thread
CVE-2023-54060 8.8 HIGH iommufd: Set end correctly when doing batch carry
CVE-2023-53986 8.6 HIGH mips: bmips: BCM6358: disable RAC flush for TP1
CVE-2022-50746 8.4 HIGH erofs: validate the extent length for uncompressed pclusters

Showing top 20 of 322 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-68362

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