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CVE-2026-53029: In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: prevent uninitialized lcn cause

25
Routine
MEDIUM 5.5WATCHLISTUPGRADE

CVE-2026-53029 is a medium-severity flaw (CVSS 5.5) affecting linux kernel. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: prevent uninitialized lcn caused by zero len syzbot reported a uninit-value in ntfs_iomap_begin [1]. Since runs was not touched yet, run_lookup_entry() immediately fails and returns false, which makes the value of "*len" 0. Simultaneously, the new value and err value are also 0, causing the logic in attr_data_get_block_locked() to jump directly to ok, ultimately resu

Why this priority

  • On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score5.5 (Medium)
Attack vectorLocal
Attack complexityLow
Privileges neededLow
User interactionNone
EPSS exploit chance0.1% (top 96%)
CISA exploited listNo
WeaknessCWE-908
Published2026-06-24
Last modified2026-07-15
Publisher (CNA): kernel.org · Vendor: linux

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Last updated 2026-07-15 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

linux linux kernel UPGRADE
Affected: >= 7.0 and < 7.0.10
Fixed in: 7.0.10
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-2026-53029?

linux kernel: upgrade to 7.0.10. Exact commands for each OS are on this page.

Is CVE-2026-53029 being exploited?

CVE-2026-53029 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-2026-53029 affect?

CVE-2026-53029 affects linux kernel. Severity is medium (CVSS 5.5). In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: prevent uninitialized lcn caused by zero len syzbot reported a uninit-value in ntfs_iomap_begin [1]. Since runs was not touched yet, run_lookup_entry() immedia

How urgent is CVE-2026-53029?

Priority 25/100. On your watchlist

Software pages

Linux kernel vulnerabilities

Related CVEs

References

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