CVE-2024-20040: In wlan firmware, there is a possible out of bounds write due to improper input validation
38
Routine
HIGH 8.8WATCHLISTDOWNGRADEDOWNGRADEMITIGATE
CVE-2024-20040 is a high-severity flaw (CVSS 8.8) affecting yocto, rdk-b, android. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
In wlan firmware, there is a possible out of bounds write due to improper input validation. This could lead to remote escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS08360153 (for MT6XXX chipsets) / WCNCR00363530 (for MT79XX chipsets); Issue ID: MSV-979.
Why this priority
High severity
On your watchlist
No fix is published yet: follow the downgrade or mitigation steps.
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
google android MITIGATE
Affected: 12.0 · 13.0 · 14.0
Fixed in: no fixed release known
Safe to downgrade to: a release before 12.0
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.
linux linux kernel MITIGATE
Affected: 4.19
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.
Downgrade not recommended
This is a core system component: downgrading can break the OS. Apply the distro update or the vendor mitigation.
openwrt openwrt MITIGATE
Affected: 19.07.0 · 21.02.0
Fixed in: no fixed release known
Safe to downgrade to: a release before 19.07.0
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 sourceNVD · 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-2024-20040?
yocto: downgrade or apply the listed mitigation; rdk-b: downgrade or apply the listed mitigation; android: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.
Is CVE-2024-20040 being exploited?
CVE-2024-20040 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-2024-20040 affect?
CVE-2024-20040 affects yocto, rdk-b, android. Severity is high (CVSS 8.8). In wlan firmware, there is a possible out of bounds write due to improper input validation. This could lead to remote escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. P
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