Linux KernelOperating system · Linux
CVE-2026-53030
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 the Linux kernel, the following vulnerability has been resolved: i3c: master: renesas: Fix memory leak in renesas_i3c_i3c_xfers() The xfer structure allocated by renesas_i3c_alloc_xfer() was never freed in the renesas_i3c_i3c_xfers() function. Use the __free(kfree) cleanup attribute to automatically free the memory when the variable goes out of scope.
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 confidenceMemory leak in the Renesas I3C master driver where the xfer structure allocated by renesas_i3c_alloc_xfer() is never freed in the renesas_i3c_i3c_xfers() function, causing gradual memory exhaustion with repeated I3C transfers.
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 data
Linux KernelOperating system
>= 6.17, < 6.18.33>= 6.19, < 7.0.10CVSS 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
- None
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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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Check kernel versionRun 'uname -r' to get the running kernel versionAffected if Version is >= 6.17 and < 6.18.33, or >= 6.19 and < 7.0.10
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Identify Renesas I3C driver presenceRun 'lsmod | grep i3c' or check /proc/modules for 'renesas_i3c', or inspect /boot/config-$(uname -v) for CONFIG_I3C_RENESAS=y or =mAffected if The renesas_i3c driver module is loaded or compiled into the kernel
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Detect I3C device enumerationCheck /sys/bus/i3c/devices/ for any I3C devices, or run 'i3c-tools' commands like 'i3cdetect -l'Affected if I3C devices managed by the Renesas controller are enumerated on the system
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Monitor for memory accumulationRun 'dmesg | grep -i i3c' to check for OOM or memory allocation failure messages, or use 'cat /proc/meminfo' periodically after I3C activity to observe gradual memory decrease in available memoryAffected if Memory usage consistently increases without recovery after repeated I3C transfers, or kernel messages show allocation failures related to i3c
System is affected if running a vulnerable kernel version AND the Renesas I3C driver is loaded with I3C devices actively performing transfers that trigger the unfreed allocation in renesas_i3c_i3c_xfers().
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.
dbcve · scoped6.18.337.0.10
Apply the kernel patch using the __free(kfree) cleanup attribute to ensure automatic memory deallocation when the variable goes out of scope, then rebuild and deploy the updated kernel.
Linux Kernel 6.18.33 or 7.0.10 (whichever branch is applicable)
- 1. Identify the current running kernel version using 'uname -r'
- 2. Determine the appropriate upgrade path based on current version: if running 6.18.x, upgrade to >= 6.18.33; if running 6.19.x through 7.0.x, upgrade to >= 7.0.10
- 3. Update the Linux kernel package to the fixed version using the distribution's package manager (e.g., 'apt update && apt upgrade' for Debian/Ubuntu, 'yum update' for RHEL/CentOS, or 'pacman -Syu' for Arch)
- 4. Reboot the system to load the fixed kernel
- 5. Verify the fix is applied by checking the kernel version with 'uname -r' and confirming it shows 6.18.33 or higher, or 7.0.10 or higher
Generated from the published advisory — verify against the referenced sources before acting.
Fix this in Linux Kernel
Scoped from the published advisory
- Consultation2.0 h
- Implementation3.0 h
- Testing4.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,040.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-53030 — 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-2026-53030 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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