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Linux KernelOperating system · Linux

CVE-2024-50141

MEDIUM · 5.5 CVSS v3.1 Published 2024-11-07
Fix available
A fix is available. Upgrade to 5.15.171 / 6.1.115 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: ACPI: PRM: Find EFI_MEMORY_RUNTIME block for PRM handler and context PRMT needs to find the correct type of block to translate the PA-VA mapping for EFI runtime services. The issue arises because the PRMT is finding a block of type EFI_CONVENTIONAL_MEMORY, which is not appropriate for runtime services as described in Section 2.2.2 (Runtime Services) of the UEFI Specification [1]. Since the PRM handler is a type of runtime service, this causes an exception when the PRM handler is called. [Firmware Bug]: Unable to handle paging request in EFI runtime service WARNING: CPU: 22 PID: 4330 at drivers/firmware/efi/runtime-wrappers.c:341 __efi_queue_work+0x11c/0x170 Call trace: Let PRMT find a block with EFI_MEMORY_RUNTIME for PRM handler and PRM context. If no suitable block is found, a warning message will be printed, but the procedure continues to manage the next PRM handler. However, if the PRM handler is actually called without proper allocation, it would result in a failure during error handling. By using the correct memory types for runtime services, ensure that the PRM handler and the context are properly mapped in the virtual address space during runtime, preventing the paging request error. The issue is really that only memory that has been remapped for runtime by the firmware can be used by the PRM handler, and so the region needs to have the EFI_MEMORY_RUNTIME attribute. [ rjw: Subject and changelog edits ]

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:>= 5.14, < 5.15.171>= 5.16, < 6.1.115>= 6.2, < 6.6.59>= 6.7, < 6.11.6= 6.12

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 5.15.171 / 6.1.115 / 6.6.59 or later
Fixed in 5.15.1716.1.1156.6.59
Vendor patch git.kernel.org →
Recommended fix High confidence

Any of: 5.15.171+, 6.1.115+, 6.6.59+, or 6.11.6+ (depending on which branch you are on)

  1. 1. Check the current running kernel version using `uname -r` or `cat /proc/version`
  2. 2. Identify which version branch the current kernel belongs to (5.14-5.15, 5.16-6.1, 6.2-6.6, or 6.7-6.11)
  3. 3. Upgrade the kernel to the appropriate fixed release for that branch: for 5.14-5.15 upgrade to 5.15.171+, for 5.16-6.1 upgrade to 6.1.115+, for 6.2-6.6 upgrade to 6.6.59+, or for 6.7-6.11 upgrade to 6.11.6+
  4. 4. Reboot the system to load the patched kernel
  5. 5. Verify the fix is applied by checking `dmesg` for any remaining EFI runtime service warnings related to PRM handlers
Caveat Kernel upgrades may introduce compatibility changes; ensure dependent modules and software are compatible with the target version

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

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Peer-ranked notes from engineers who’ve handled CVE-2024-50141 in production — separate from our analysis above.

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