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CVE-2025-68362

UnknownEPSS 0.18%

Last modified

CVE-2025-68362 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 0.18% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability
0.18%

7.5th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 6f7853f3cbe457067e9fe05461f56c7ea4ac488c, < 118e12bf3e4288cf845cd3759bd9d4c99f91aab5; >= 6f7853f3cbe457067e9fe05461f56c7ea4ac488c, < 6a96bd0d94305fd04a6ac64446ec113bae289384; >= 6f7853f3cbe457067e9fe05461f56c7ea4ac488c, < e2f3ea15e804607e0a4a34a2f6c331c8750b68bc; >= 6f7853f3cbe457067e9fe05461f56c7ea4ac488c, < dc153401fb26c1640a2b279c47b65e1c416af276; >= 6f7853f3cbe457067e9fe05461f56c7ea4ac488c, < 4758770a673c60d8f615809304d72e1432fa6355; >= 6f7853f3cbe457067e9fe05461f56c7ea4ac488c, < 638d4148e166d114a4cd7becaae992ce1a815ed8; >= 6f7853f3cbe457067e9fe05461f56c7ea4ac488c, < 5ebf0fe7eaef9f6173a4c6ea77c5353e21645d15; >= 6f7853f3cbe457067e9fe05461f56c7ea4ac488c, < b647d2574e4583c2e3b0ab35568f60c88e910840
LinuxLinux2.6.27

References

Timeline

Published
Last Modified
Status
Deferred

Frequently Asked Questions

What is CVE-2025-68362?
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.
How severe is CVE-2025-68362?
Severity scoring for CVE-2025-68362 is pending analysis. The EPSS model estimates a 0.18% probability of exploitation in the next 30 days.
How do I fix CVE-2025-68362?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST