CVE-2026-68355
In the Linux kernel, the following vulnerability has been resolved:
wifi: ath11k: fix potential buffer underflow in ath11k_hal_rx_msdu_list_get()
When the first entry in msdu_details has a zero buffer address,
the code accesses msdu_details[i - 1] with i == 0, causing a
buffer underflow.
Fix similarly to ath12k_wifi7_hal_rx_msdu_list_get() by adding
a separate check for i == 0 before the main condition to prevent
the out-of-bounds access.
Found by Linux Verification Center (linuxtesting.org) with SVACE.
CSIRTS triage
- What
- A potential buffer underflow exists in the ath11k WiFi driver's MSDU list parsing function.
- Who is affected
- Systems running affected versions of the Linux kernel with Qualcomm ath11k WiFi driver.
- Urgency
- Low severity (CVSS 2.5); buffer underflow requires specific packet conditions and has limited impact.
- Action
- Apply Linux kernel patch addressing CVE-2026-68355 or update to a patched kernel version.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.18% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 7% of all EPSS-scored CVEs.
Advisory coverage (2)
External references
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