CVE-2024-34748
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedIn _DevmemXReservationPageAddress of devicemem_server.c, there is a possible use-after-free due to improper casting. This could lead to local escalation of privilege in the kernel with no additional execution privileges needed. User interaction is not needed for exploitation.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceA use-after-free vulnerability exists in the Linux kernel's devicemem component (devicemem_server.c) in the _DevmemXReservationPageAddress function. The vulnerability is caused by improper memory casting, which can lead to local privilege escalation from an unprivileged user context to kernel privileges without user interaction.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE dataall versionsCVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Local
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Confirm the device is running AndroidCheck /proc/version or use 'getprop ro.build.version.release' to verify the OS is Android. This CVE specifically affects Android devices.Affected if The device is running any version of Google Android
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Check the kernel versionRun 'uname -r' or check /proc/version to identify the kernel version. Compare against any available kernel patches or updates from the vendor.Affected if The kernel version has not been patched to address the use-after-free in devicemem_server.c
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Verify devicemem subsystem presenceCheck if the kernel configuration includes CONFIG_DEVICEMEM or similar devicemem-related options. This can be done by checking /boot/config-* or using 'cat /proc/config.gz' if available, or by examining /sys/module for devicemem-related modules.Affected if The devicemem subsystem is compiled into the kernel or loaded as a module, as the vulnerability exists in the _DevmemXReservationPageAddress function within this component
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Check for exposed devicemem interfacesInspect /dev/ for device nodes related to devicemem (such as /dev/devmem or similar device memory interfaces). Use 'ls -la /dev/*mem*' to enumerate. Also check /sys/class/misc/ for devicemem entries.Affected if Devicemem device nodes are exposed, allowing access to the vulnerable function
A user is affected if the device runs Android with a kernel containing the devicemem component where unprivileged local access to devicemem interfaces is possible and the kernel has not been patched to fix the improper memory casting in _DevmemXReservationPageAddress.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataApply the upstream kernel patch or obtain the vendor-specific security update that addresses the improper casting in devicemem_server.c. Given the local privilege escalation risk, prioritize patching on systems where untrusted local users have access.
- Consultation3.0 h
- Implementation2.0 h
- Testing6.0 h
- Review / QA3.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2024-34748 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2024-34748 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Version or environment caveats, and links to real fixes
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