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Linux KernelOperating system · Linux

CVE-2024-26779

HIGH · 8.8 CVSS v3.1 Published 2024-04-03
Fix available
A fix is available. Upgrade to 4.19.308 / 5.4.270 or later.
See remediation →
93/100
Remediation priority · Urgent
No privileges 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: wifi: mac80211: fix race condition on enabling fast-xmit fast-xmit must only be enabled after the sta has been uploaded to the driver, otherwise it could end up passing the not-yet-uploaded sta via drv_tx calls to the driver, leading to potential crashes because of uninitialized drv_priv data. Add a missing sta->uploaded check and re-check fast xmit after inserting a sta.

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
How this class of weakness works · CWE-362

Two operations that should be atomic can interleave, so an attacker who wins a narrow timing window reaches an inconsistent, exploitable state. These bugs are subtle and easy to miss in review. Fixing them properly means correct locking or atomic operations around the shared resource.

General guidance for the race condition class — the official description and references above are authoritative for this specific CVE. Want a bespoke review and a reviewed fix? Ask our team →

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:< 4.19.308>= 4.20, < 5.4.270>= 5.5, < 5.10.211>= 5.11, < 5.15.150>= 5.16, < 6.1.80>= 6.2, < 6.6.19>= 6.7, < 6.7.7= 6.8
Debian LinuxOperating system
Affected:= 10.0

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
Adjacent
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:A/AC:L/PR:N/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 4.19.308 / 5.4.270 / 5.10.211 or later
Fixed in 4.19.3085.4.2705.10.211
Vendor patch git.kernel.org →
Recommended fix High confidence

5.15.150 (or 5.10.211/5.4.270/4.19.308 depending on your kernel branch)

  1. 1. Check current kernel version using 'uname -r' or 'cat /proc/version'
  2. 2. Determine which kernel branch you are running (e.g., 4.19.x, 5.4.x, 5.10.x, or 5.15.x)
  3. 3. For Debian 10 (Buster), note this release reached end-of-life in June 2024 - plan migration to Debian 11 (Bullseye) or Debian 12 (Bookworm)
  4. 4. Upgrade to the fixed kernel version for your branch: 4.19.308 or later, 5.4.270 or later, 5.10.211 or later, or 5.15.150 or later
  5. 5. On Debian: 'apt-get update && apt-get install linux-image-<version>' for your chosen stable kernel
  6. 6. Reboot the system to load the fixed kernel: 'reboot'
  7. 7. Verify the new kernel is running: 'uname -r'
Caveat Kernel upgrade is generally safe but may require recompiling third-party kernel modules; Debian 10 users should plan migration to supported release

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-2024-26779 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
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