wifi: rtl818x: rtl8187: Fix potential buffer underflow in rtl8187_rx_cb() (Linux Linux)

CVE-2025-68362
Not available

At a glance

Source
NVD
EPSS
EPSS 0.21 % · percentile 12 ()
State
PUBLISHED
Published
Updated
Assigner
Linux
NVD status
Deferred

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.

References

European references

CERT-FR advisories

Affected products

ProductVersions
Linux · Linuxaffected 6f7853f3cbe457067e9fe05461f56c7ea4ac488c < 118e12bf3e4288cf845cd3759bd9d4c99f91aab5 ; affected 6f7853f3cbe457067e9fe05461f56c7ea4ac488c < 6a96bd0d94305fd04a6ac64446ec113bae289384 ; affected 6f7853f3cbe457067e9fe05461f56c7ea4ac488c < e2f3ea15e804607e0a4a34a2f6c331c8750b68bc ; affected 6f7853f3cbe457067e9fe05461f56c7ea4ac488c < dc153401fb26c1640a2b279c47b65e1c416af276 ; affected 6f7853f3cbe457067e9fe05461f56c7ea4ac488c < 4758770a673c60d8f615809304d72e1432fa6355 ; affected 6f7853f3cbe457067e9fe05461f56c7ea4ac488c < 638d4148e166d114a4cd7becaae992ce1a815ed8
Linux · Linuxaffected 2.6.27 ; unaffected 0 < 2.6.27 ; unaffected 5.10.248 ≤ 5.10.* ; unaffected 5.15.198 ≤ 5.15.* ; unaffected 6.1.160 ≤ 6.1.* ; unaffected 6.6.120 ≤ 6.6.*

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD