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Linux KernelOperating system · Linux

CVE-2024-35958

MEDIUM · 5.5 CVSS v3.1 Published 2024-05-20
Fix available
A fix is available. Upgrade to 5.10.216 / 5.15.156 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: net: ena: Fix incorrect descriptor free behavior ENA has two types of TX queues: - queues which only process TX packets arriving from the network stack - queues which only process TX packets forwarded to it by XDP_REDIRECT or XDP_TX instructions The ena_free_tx_bufs() cycles through all descriptors in a TX queue and unmaps + frees every descriptor that hasn't been acknowledged yet by the device (uncompleted TX transactions). The function assumes that the processed TX queue is necessarily from the first category listed above and ends up using napi_consume_skb() for descriptors belonging to an XDP specific queue. This patch solves a bug in which, in case of a VF reset, the descriptors aren't freed correctly, leading to crashes.

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:>= 5.6, < 5.10.216>= 5.11, < 5.15.156>= 5.16, < 6.1.87>= 6.2, < 6.6.28>= 6.7, < 6.8.7= 6.9
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 5.10.216 / 5.15.156 / 6.1.87 or later
Fixed in 5.10.2165.15.1566.1.87
Vendor patch git.kernel.org →
Recommended fix High confidence

kernel 5.10.216 / 5.15.156 / 6.1.87 / 6.6.28 (or later in respective branches)

  1. Identify the current kernel version using `uname -r`
  2. Determine which version branch you are running (e.g., 5.10.x, 5.15.x, 6.1.x, or 6.2.x)
  3. For Debian 10 (Buster) users: Upgrade to a newer Debian release or obtain a backported kernel with the fix
  4. For upstream kernel users: Upgrade to kernel 5.10.216+, 5.15.156+, 6.1.87+, or 6.6.28+ as appropriate for your branch
  5. Reboot the system to load the fixed kernel
  6. Verify the fix is applied by checking `ena_free_tx_bufs` behavior or reviewing the kernel version
Caveat Kernel upgrades may require system reboot and could introduce compatibility issues with out-of-tree kernel modules or custom drivers

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-2024-35958 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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