CVE-2024-34747
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 DevmemXIntMapPages of devicemem_server.c, there is a possible use-after-free due to a logic error in the code. 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 · moderate confidenceA use-after-free vulnerability exists in the DevmemXIntMapPages function in devicemem_server.c within the Linux kernel. Due to a logic error, memory is accessed after being freed, which can be exploited for local privilege escalation to root/kernel privileges without requiring user interaction or additional execution privileges.
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
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:L/AC:L/PR:L/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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Identify the kernel versionRun 'uname -r' or check /proc/version to determine the running kernel versionAffected if The kernel version has not received the vendor security patch for this CVE (Android kernels with unpatched devicemem_server.c)
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Check if devicemem interface existsLook for /dev/ device files related to device memory mapping (such as /dev/mem, /dev/kmem, or vendor-specific device memory interfaces)Affected if The device memory mapping interface is present and accessible, which is required for the vulnerable code path to be reachable
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Verify the DevmemXIntMapPages function presenceCheck /proc/kallsyms or use 'nm' on the kernel image to search for DevmemXIntMapPages or related devicemem symbolsAffected if The function symbol exists in the running kernel, indicating the vulnerable code is compiled into the kernel
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Check kernel configuration for devicemem supportInspect /boot/config-* or /proc/config.gz (if available) for CONFIG_DEVICEMEM or related memory mapping configurationsAffected if Device memory mapping support is enabled in the kernel configuration, enabling the attack surface
The device is affected if it runs an unpatched Android kernel with the devicemem interface enabled and the vulnerable DevmemXIntMapPages function present in memory mapping code.
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 vendor-provided kernel security patch for this vulnerability. Until the patch is available, consider restricting access to the affected device/memory mapping interfaces or disabling the vulnerable kernel module if possible.
- Consultation4.0 h
- Implementation8.0 h
- Testing12.0 h
- Review / QA6.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2024-34747 — 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-2024-34747 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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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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