CVE-2022-40505: Information disclosure due to buffer over-read in Modem while parsing DNS hostname.

This month

HIGH 8.2REMOTEMITIGATEMITIGATEMITIGATE

CVE-2022-40505 is a high-severity flaw (CVSS 8.2) affecting 9205 lte modem firmware, 9206 lte modem firmware, 9207 lte modem firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Information disclosure due to buffer over-read in Modem while parsing DNS hostname.

Why this priority

High severity
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	8.2 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 71%)
CISA exploited list	No
Weakness	CWE-126, CWE-125
Published	2023-05-02
Last modified	2026-06-17

Publisher (CNA): Qualcomm, Inc. · Vendor: qualcomm

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-05-02 06:15 UTCPublished CVE record published
2026-06-17 05:01 UTCUpdated Record last modified

qualcomm 9205 lte modem firmware MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

qualcomm 9206 lte modem firmware MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

qualcomm 9207 lte modem firmware MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

qualcomm mdm8207 firmware MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

qualcomm qca4004 firmware MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

qualcomm qca4010 firmware MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2022-40505?

9205 lte modem firmware: mitigate or apply the listed mitigation; 9206 lte modem firmware: mitigate or apply the listed mitigation; 9207 lte modem firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2022-40505 being exploited?

CVE-2022-40505 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2022-40505 affect?

CVE-2022-40505 affects 9205 lte modem firmware, 9206 lte modem firmware, 9207 lte modem firmware. Severity is high (CVSS 8.2). Information disclosure due to buffer over-read in Modem while parsing DNS hostname.

How urgent is CVE-2022-40505?

Priority 41/100. High severity; Remotely exploitable, no login, no user action

Software pages

Qualcomm vulnerabilities

Related CVEs

CVE-2026-25263 MEDIUM 6.6 MITIGATE MITIGATE Memory corruption while processing IOCTL command called from user space to the kernel with invalid parameters.
CVE-2025-27053 HIGH 7.8 MITIGATE MITIGATE Memory corruption during PlayReady APP usecase while processing TA commands.
CVE-2025-27054 HIGH 7.8 MITIGATE MITIGATE Memory corruption while processing a malformed license file during reboot.
CVE-2025-21482 HIGH 7.1 MITIGATE MITIGATE Cryptographic issue while performing RSA PKCS padding decoding.
CVE-2025-21465 MEDIUM 6.5 MITIGATE MITIGATE Information disclosure while processing the hash segment in an MBN file.

References

← Back to latest CVEs