CVE-2026-21366: Integer Overflow or Wraparound in Data Network Stack & Connectivity
Published Aug 4, 2026
·Updated
Memory corruption while processing a packet with a size close to the maximum allowed value.
Affected Software
66 affected components
All of the following
Qualcomm Lemans Au Lgit Firmware
Qualcomm Lemans Au Lgit
All of the following
Qualcomm Lemansau Firmware
Qualcomm Lemansau
All of the following
Qualcomm Qam8255p Firmware
Qualcomm Qam8255p
All of the following
Qualcomm Qam8295p Firmware
Qualcomm Qam8295p
All of the following
Qualcomm Qam8620p Firmware
Qualcomm Qam8620p
All of the following
Qualcomm Qamsrv1h Firmware
Qualcomm Qamsrv1h
All of the following
Qualcomm Qamsrv1m Firmware
Qualcomm Qamsrv1m
All of the following
Qualcomm Qca6574au Firmware
Qualcomm QCA6574AU
All of the following
Qualcomm Qca6595 Firmware
Qualcomm Qca6595
All of the following
Qualcomm Qca6595au Firmware
Qualcomm Qca6595au
All of the following
Qualcomm Qca6688aq Firmware
Qualcomm Qca6688aq
All of the following
Qualcomm Qca6696 Firmware
Qualcomm Qca6696
All of the following
Qualcomm Qca6698aq Firmware
Qualcomm Qca6698aq
All of the following
Qualcomm Qca6797aq Firmware
Qualcomm Qca6797aq
All of the following
Qualcomm Qca8695au Firmware
Qualcomm Qca8695au
All of the following
Qualcomm Sa6145p Firmware
Qualcomm Sa6145p
All of the following
Qualcomm Sa6150p Firmware
Qualcomm Sa6150p
All of the following
Qualcomm Sa6155p Firmware
Qualcomm Sa6155p
All of the following
Qualcomm Sa7255p Firmware
Qualcomm Sa7255p
All of the following
Qualcomm Sa7775p Firmware
Qualcomm Sa7775p
All of the following
Qualcomm Sa8145p Firmware
Qualcomm Sa8145p
All of the following
Qualcomm Sa8150p Firmware
Qualcomm Sa8150p
All of the following
Qualcomm Sa8155p Firmware
Qualcomm Sa8155p
All of the following
Qualcomm Sa8195p Firmware
Qualcomm Sa8195p
All of the following
Qualcomm Sa8255p Firmware
Qualcomm Sa8255p
All of the following
Qualcomm Sa8295p Firmware
Qualcomm Sa8295p
All of the following
Qualcomm Sa8540p Firmware
Qualcomm Sa8540p
All of the following
Qualcomm Sa8620p Firmware
Qualcomm Sa8620p
All of the following
Qualcomm Sa8770p Firmware
Qualcomm Sa8770p
All of the following
Qualcomm Sa9000p Firmware
Qualcomm Sa9000p
All of the following
Qualcomm Srv1h Firmware
Qualcomm Srv1h
All of the following
Qualcomm Srv1l Firmware
Qualcomm Srv1l
All of the following
Qualcomm Srv1m Firmware
Qualcomm Srv1m
Event History
Aug 4, 2026
CVE Published
via MITRE·03:07 PM
Data Sourced
via MITRE·03:07 PM
DescriptionSeverityWeakness
Data Sourced
via NVD·04:16 PM
DescriptionSeverityWeaknessAffected Software
Frequently Asked Questions
1
What is the severity of CVE-2026-21366?
The severity of CVE-2026-21366 is classified as high with a score of 7.8.
2
What type of vulnerability is CVE-2026-21366?
CVE-2026-21366 is an integer overflow vulnerability that can lead to memory corruption.
3
What impact does CVE-2026-21366 have on affected systems?
CVE-2026-21366 can result in memory corruption while processing oversized packets, potentially compromising system integrity.
4
How can I mitigate the risks associated with CVE-2026-21366?
Mitigation for CVE-2026-21366 typically involves applying vendor patches and updating the affected software.
5
Where can I find more information about CVE-2026-21366?
Detailed information about CVE-2026-21366 can be found in the associated security bulletins from the vendor.