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Linux KernelOperating system · Linux

CVE-2025-38190

MEDIUM · 5.5 CVSS v3.1 Published 2025-07-04
Fix available
A fix is available. Upgrade to 5.4.295 / 5.10.239 or later.
See remediation →
57/100
Remediation priority · Elevated
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: atm: Revert atm_account_tx() if copy_from_iter_full() fails. In vcc_sendmsg(), we account skb->truesize to sk->sk_wmem_alloc by atm_account_tx(). It is expected to be reverted by atm_pop_raw() later called by vcc->dev->ops->send(vcc, skb). However, vcc_sendmsg() misses the same revert when copy_from_iter_full() fails, and then we will leak a socket. Let's factorise the revert part as atm_return_tx() and call it in the failure path. Note that the corresponding sk_wmem_alloc operation can be found in alloc_tx() as of the blamed commit. $ git blame -L:alloc_tx net/atm/common.c c55fa3cccbc2c~

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:>= 2.6.13, < 5.4.295>= 5.5, < 5.10.239>= 5.11, < 5.15.186>= 5.16, < 6.1.142>= 6.2, < 6.6.95>= 6.7, < 6.12.35>= 6.13, < 6.15.4= 2.6.12= 6.16
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
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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 5.4.295 / 5.10.239 / 5.15.186 or later
Fixed in 5.4.2955.10.2395.15.186
Vendor patch git.kernel.org →
Recommended fix High confidence

Linux Kernel 5.4.295+ / 5.10.239+ / 5.15.186+ / 6.1.142+ or Debian 11 kernel with patch applied

  1. Check current kernel version: uname -r
  2. Identify the appropriate upgrade version based on your current kernel branch: For 5.4.x upgrade to >=5.4.295, for 5.10.x upgrade to >=5.10.239, for 5.15.x upgrade to >=5.15.186, for 6.1.x upgrade to >=6.1.142
  3. For Debian 11 (bullseye), check for available kernel updates: apt-get update && apt-cache policy linux-image-*
  4. Upgrade the kernel package using your distribution's package manager: apt-get install linux-image-<version> or yum/dnf update kernel
  5. Reboot the system to load the fixed kernel
  6. Verify the fix is applied by checking the kernel version after reboot
Caveat Kernel upgrades may require system reboot and could introduce compatibility issues with out-of-tree kernel modules or proprietary drivers; ensure all kernel modules are compatible with the new version

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 $1,600. 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-2025-38190 in production — separate from our analysis above.

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What this is

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What belongs here
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  • Version or environment caveats, and links to real fixes
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