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Linux KernelOperating system · Linux

CVE-2025-37839

HIGH · 7.8 CVSS v3.1 Published 2025-05-09
Fix available
A fix is available. Upgrade to 5.4.293 / 5.10.237 or later.
See remediation →
80/100
Remediation priority · High
Zero-click Patch available

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 · unedited
In the Linux kernel, the following vulnerability has been resolved: jbd2: remove wrong sb->s_sequence check Journal emptiness is not determined by sb->s_sequence == 0 but rather by sb->s_start == 0 (which is set a few lines above). Furthermore 0 is a valid transaction ID so the check can spuriously trigger. Remove the invalid WARN_ON.

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

A detailed technical summary for this CVE is being prepared.

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
Affected:< 5.4.293>= 5.5, < 5.10.237>= 5.11, < 5.15.181>= 5.16, < 6.1.135>= 6.2, < 6.6.88>= 6.7, < 6.12.24>= 6.13, < 6.13.12>= 6.14, < 6.14.3
Debian LinuxOperating system
Affected:= 11.0

CVSS 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

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 · scoped
Upgrade available Upgrade to 5.4.293 / 5.10.237 / 5.15.181 or later
Fixed in 5.4.2935.10.2375.15.181
Vendor patch git.kernel.org →
Recommended fix High confidence

Kernel version >= 6.1.135 (or 5.15.181/5.10.237/5.4.293 depending on branch); For Debian 11: update to latest stable kernel via `apt update && apt full-upgrade`

  1. Check currently running kernel version with `uname -r`
  2. For Debian 11, update package lists: `apt update`
  3. Upgrade kernel package: `apt install linux-image-<version>` or `apt full-upgrade`
  4. Reboot into the new kernel: `reboot`
  5. Verify kernel version after reboot: `uname -r` - should be >= 6.1.135, >= 5.15.181, >= 5.10.237, or >= 5.4.293 as applicable
Caveat Kernel upgrades may require matching kernel modules; ensure boot loader (GRUB) is configured to boot the new kernel; some hardware drivers may behave differently

Generated from the published advisory — verify against the referenced sources before acting.

We can perform the upgrade in your staging environment and verify nothing breaks — typical engagement from $1,950. Get the upgrade done

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2025-37839 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • 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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