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Linux KernelOperating system · Linux

CVE-2024-35819

MEDIUM · 5.5 CVSS v3.1 Published 2024-05-17
Fix available
A fix is available. Upgrade to 4.10 / 4.15 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: soc: fsl: qbman: Use raw spinlock for cgr_lock smp_call_function always runs its callback in hard IRQ context, even on PREEMPT_RT, where spinlocks can sleep. So we need to use a raw spinlock for cgr_lock to ensure we aren't waiting on a sleeping task. Although this bug has existed for a while, it was not apparent until commit ef2a8d5478b9 ("net: dpaa: Adjust queue depth on rate change") which invokes smp_call_function_single via qman_update_cgr_safe every time a link goes up or down.

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:>= 4.9.92, < 4.10>= 4.14.32, < 4.15>= 4.15.15, < 4.16>= 4.16.1, < 4.19.312>= 4.20, < 5.4.274>= 5.5, < 5.10.215>= 5.11, < 5.15.154>= 5.16, < 6.1.84>= 6.2, < 6.6.24>= 6.7, < 6.7.12>= 6.8, < 6.8.3= 4.16
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
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 4.10 / 4.15 / 4.16 or later
Fixed in 4.104.154.16
Vendor patch git.kernel.org →
Recommended fix High confidence

Linux Kernel >= 4.19.312 (or backport branch with fix)

  1. Upgrade Linux kernel to version >= 4.19.312 which includes the fix for the cgr_lock raw spinlock conversion
  2. Alternatively, if building from source, apply the commit 2b3fede8225133671ce837c0d284804aa3bc7a02 which changes cgr_lock from spinlock_t to raw_spinlock_t in the qbman driver code
  3. After kernel upgrade or patch application, reboot the system to load the fixed kernel
Caveat Upgrading kernel major versions may require rebuilding custom kernel modules; ensure driver compatibility with the target kernel version

Generated from the published advisory — verify against the referenced sources before acting.

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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-2024-35819 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
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