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Linux KernelOperating system · Linux

CVE-2024-43879

MEDIUM · 5.5 CVSS v3.1 Published 2024-08-21
Fix available
A fix is available. Upgrade to 4.19.320 / 5.4.282 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: wifi: cfg80211: handle 2x996 RU allocation in cfg80211_calculate_bitrate_he() Currently NL80211_RATE_INFO_HE_RU_ALLOC_2x996 is not handled in cfg80211_calculate_bitrate_he(), leading to below warning: kernel: invalid HE MCS: bw:6, ru:6 kernel: WARNING: CPU: 0 PID: 2312 at net/wireless/util.c:1501 cfg80211_calculate_bitrate_he+0x22b/0x270 [cfg80211] Fix it by handling 2x996 RU allocation in the same way as 160 MHz bandwidth.

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:>= 4.19, < 4.19.320>= 4.20, < 5.4.282>= 5.5, < 5.10.224>= 5.11, < 5.15.165>= 5.16, < 6.1.103>= 6.2, < 6.6.44>= 6.7, < 6.10.3

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 4.19.320 / 5.4.282 / 5.10.224 or later
Fixed in 4.19.3205.4.2825.10.224
Vendor patch git.kernel.org →
Recommended fix High confidence

Upgrade to kernel version 5.15.165 (or newer 5.15.x), 5.10.224 (or newer 5.10.x), 5.4.282 (or newer 5.4.x), or 4.19.320 (or newer 4.19.x). For long-term support, 5.15.165+ is recommended.

  1. Identify the current kernel version using `uname -r`
  2. For RHEL/CentOS systems: `sudo yum update kernel` or `sudo dnf install kernel-<version>`
  3. For Debian/Ubuntu systems: `sudo apt-get update && sudo apt-get install linux-image-<version>`
  4. For SUSE systems: `sudo zypper update kernel-default`
  5. After installation, reboot the system using `sudo reboot` to load the fixed kernel
  6. Verify the fix by checking `uname -r` shows a version >= 5.15.165, >= 5.10.224, >= 5.4.282, or >= 4.19.320, and confirm the warning no longer appears in dmesg
Caveat Kernel upgrades may require rebuild of third-party kernel modules (like proprietary GPU drivers). Ensure compatibility of kernel modules and critical applications with the target version 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-2024-43879 in production — separate from our analysis above.

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What this is

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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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