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Linux KernelOperating system · Linux

CVE-2024-27063

MEDIUM · 5.5 CVSS v3.1 Published 2024-05-01
Fix available
A fix is available. Upgrade to 6.6.24 / 6.7.12 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: leds: trigger: netdev: Fix kernel panic on interface rename trig notify Commit d5e01266e7f5 ("leds: trigger: netdev: add additional specific link speed mode") in the various changes, reworked the way to set the LINKUP mode in commit cee4bd16c319 ("leds: trigger: netdev: Recheck NETDEV_LED_MODE_LINKUP on dev rename") and moved it to a generic function. This changed the logic where, in the previous implementation the dev from the trigger event was used to check if the carrier was ok, but in the new implementation with the generic function, the dev in trigger_data is used instead. This is problematic and cause a possible kernel panic due to the fact that the dev in the trigger_data still reference the old one as the new one (passed from the trigger event) still has to be hold and saved in the trigger_data struct (done in the NETDEV_REGISTER case). On calling of get_device_state(), an invalid net_dev is used and this cause a kernel panic. To handle this correctly, move the call to get_device_state() after the new net_dev is correctly set in trigger_data (in the NETDEV_REGISTER case) and correctly parse the new dev.

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:>= 6.5, < 6.6.24>= 6.7, < 6.7.12>= 6.8, < 6.8.3

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 6.6.24 / 6.7.12 / 6.8.3 or later
Fixed in 6.6.246.7.126.8.3
Vendor patch git.kernel.org →
Recommended fix High confidence

kernel 6.6.24+ (for 6.5-6.6.23), 6.7.12+ (for 6.7-6.7.11), or 6.8.3+ (for 6.8-6.8.2)

  1. Identify the currently running kernel version using `uname -r`
  2. Based on the current version, upgrade to the appropriate fixed release:
  3. - If running kernel 6.5.x through 6.6.23: upgrade to kernel 6.6.24 or later
  4. - If running kernel 6.7.x through 6.7.11: upgrade to kernel 6.7.12 or later
  5. - If running kernel 6.8.x through 6.8.2: upgrade to kernel 6.8.3 or later
  6. After upgrade, reboot the system to load the fixed kernel
  7. Verify the fix is applied by checking the kernel version with `uname -r`
Caveat Standard kernel upgrade risks apply - ensure compatibility with custom drivers/modules and user-space tools before rebooting

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-2024-27063 in production — separate from our analysis above.

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What this is

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