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Linux KernelOperating system · Linux

CVE-2024-44949

HIGH · 7.8 CVSS v3.1 Published 2024-09-04
Fix available
A fix is available. Upgrade to 6.6.46 / 6.10.5 or later.
See remediation →
80/100
Remediation priority · High
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: parisc: fix a possible DMA corruption ARCH_DMA_MINALIGN was defined as 16 - this is too small - it may be possible that two unrelated 16-byte allocations share a cache line. If one of these allocations is written using DMA and the other is written using cached write, the value that was written with DMA may be corrupted. This commit changes ARCH_DMA_MINALIGN to be 128 on PA20 and 32 on PA1.1 - that's the largest possible cache line size. As different parisc microarchitectures have different cache line size, we define arch_slab_minalign(), cache_line_size() and dma_get_cache_alignment() so that the kernel may tune slab cache parameters dynamically, based on the detected cache line size.

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:< 6.6.46>= 6.7, < 6.10.5= 6.11

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
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/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 6.6.46 / 6.10.5 or later
Fixed in 6.6.466.10.5
Vendor patch git.kernel.org →
Recommended fix High confidence

Linux Kernel 6.6.46, 6.10.5, or later stable releases

  1. Identify the current running kernel version using 'uname -r' or 'cat /proc/version'
  2. Check if the system is running a parisc architecture kernel by examining the kernel version string
  3. If running a vulnerable version (< 6.6.46, 6.7.x-6.10.4, or 6.11.x), plan for a kernel upgrade
  4. Obtain a patched kernel package from your Linux distribution vendor or kernel.org
  5. Upgrade the kernel package using the distribution's package manager (e.g., apt-get update && apt-get install linux-image-* for Debian-based systems, or yum/dnf for RHEL-based)
  6. Reboot the system to load the new kernel
  7. Verify the new kernel is running and check that ARCH_DMA_MINALIGN has been increased by examining /sys/kernel/debug/kernel_page_flags or rebuilding the kernel with the fix and verifying the value
Caveat Kernel upgrades may require system reboot and could introduce compatibility changes with custom modules or software; ensure backups and test in non-production environment first

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-2024-44949 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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