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Linux KernelOperating system · Linux

CVE-2024-45009

MEDIUM · 5.5 CVSS v3.1 Published 2024-09-11
Fix available
A fix is available. Upgrade to 5.15.167 / 6.1.107 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: mptcp: pm: only decrement add_addr_accepted for MPJ req Adding the following warning ... WARN_ON_ONCE(msk->pm.add_addr_accepted == 0) ... before decrementing the add_addr_accepted counter helped to find a bug when running the "remove single subflow" subtest from the mptcp_join.sh selftest. Removing a 'subflow' endpoint will first trigger a RM_ADDR, then the subflow closure. Before this patch, and upon the reception of the RM_ADDR, the other peer will then try to decrement this add_addr_accepted. That's not correct because the attached subflows have not been created upon the reception of an ADD_ADDR. A way to solve that is to decrement the counter only if the attached subflow was an MP_JOIN to a remote id that was not 0, and initiated by the host receiving the RM_ADDR.

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:>= 5.10, < 5.15.167>= 5.16, < 6.1.107>= 6.2, < 6.6.48>= 6.7, < 6.10.7= 6.11

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 5.15.167 / 6.1.107 / 6.6.48 or later
Fixed in 5.15.1676.1.1076.6.48
Vendor patch git.kernel.org →
Recommended fix High confidence

Linux kernel >= 5.15.167, >= 6.1.107, >= 6.6.48, or >= 6.10.7 (depending on your kernel branch)

  1. 1. Identify the currently running Linux kernel version using `uname -r`
  2. 2. Check if the running kernel version is within any of the affected ranges: 5.10 to 5.15.166, 5.16 to 6.1.106, 6.2 to 6.6.47, or 6.7 to 6.10.6
  3. 3. If affected, update the kernel package to one of the fixed versions: 5.15.167+, 6.1.107+, 6.6.48+, or 6.10.7+
  4. 4. On Debian-based systems: `apt-get update && apt-get install linux-image-<version>`
  5. 5. On RHEL/CentOS: `yum update kernel`
  6. 6. Reboot the system to load the new kernel
Caveat Kernel upgrades may introduce regressions in other subsystems; test in staging environment before production deployment

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-2024-45009 in production — separate from our analysis above.

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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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