CVE-2022-40536 — Transient DOS due to improper authentication in modem while receiving plain TLB

Transient DOS due to improper authentication in modem while receiving plain TLB OTA request message from network.

01What is this vulnerability?

Transient DOS due to improper authentication in modem while receiving plain TLB OTA request message from network.

02Affected products

Vendor	Product	Versions
Qualcomm, Inc.	Snapdragon	315 5G IoT Modem, AR8035, FastConnect 6200, FastConnect 6700, FastConnect 6800, FastConnect 6900, FastConnect 7800, QCA6391, QCA6421, QCA6426, QCA6431, QCA6436, QCA6574A, QCA6574AU, QCA6595AU, QCA6696, QCA6698AQ, QCA8081, QCA8337, QCM4490, QCM6490, QCN6024, QCN9024, QCS4490, QCS6490, QCS8550, SD855, SD865 5G, SD888, SDX55, SDX57M, SM4450, SM7250P, SM7315, SM7325P, Snapdragon 4 Gen 1 Mobile Platform, Snapdragon 480 5G Mobile Platform, Snapdragon 480+ 5G Mobile Platform (SM4350-AC), Snapdragon 690 5G Mobile Platform, Snapdragon 695 5G Mobile Platform, Snapdragon 750G 5G Mobile Platform, Snapdragon 765 5G Mobile Platform (SM7250-AA), Snapdragon 765G 5G Mobile Platform (SM7250-AB), Snapdragon 768G 5G Mobile Platform (SM7250-AC), Snapdragon 778G 5G Mobile Platform, Snapdragon 778G+ 5G Mobile Platform (SM7325-AE), Snapdragon 780G 5G Mobile Platform, Snapdragon 782G Mobile Platform (SM7325-AF), Snapdragon 7c+ Gen 3 Compute, Snapdragon 8 Gen 1 Mobile Platform, Snapdragon 8+ Gen 1 Mobile Platform, Snapdragon 855 Mobile Platform, Snapdragon 855+/860 Mobile Platform (SM8150-AC), Snapdragon 865 5G Mobile Platform, Snapdragon 865+ 5G Mobile Platform (SM8250-AB), Snapdragon 870 5G Mobile Platform (SM8250-AC), Snapdragon 888 5G Mobile Platform, Snapdragon 888+ 5G Mobile Platform (SM8350-AC), Snapdragon Auto 5G Modem-RF, Snapdragon X55 5G Modem-RF System, Snapdragon X65 5G Modem-RF System, Snapdragon X70 Modem-RF System, Snapdragon XR2 5G Platform, SXR2130, WCD9341, WCD9360, WCD9370, WCD9375, WCD9380, WCD9385, WCN3950, WCN3988, WCN6740, WSA8810, WSA8815, WSA8830, WSA8832, WSA8835

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2023-06-06T07:39:03.860Z
• Last modified: 2024-08-03T12:21:46.455Z

09References

• www.qualcomm.com — https://www.qualcomm.com/company/product-security/bulletins/june-2023-bulletin