Linux Kernel up to 6.11.4 HugeTLB Page unuse_pud_range allocation of resources

CVSS Meta Temp Score
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CTI Interest Score
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4.9$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 5.10.227/5.15.168/6.1.113/6.6.57/6.11.4 and classified as problematic. The impacted element is the function unuse_pud_range of the component HugeTLB Page. Such manipulation leads to allocation of resources. This vulnerability is uniquely identified as CVE-2024-50199. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 5.10.227/5.15.168/6.1.113/6.6.57/6.11.4 and classified as problematic. Affected by this issue is the function unuse_pud_range of the component HugeTLB Page. The manipulation with an unknown input leads to a allocation of resources vulnerability. Using CWE to declare the problem leads to CWE-770. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor. The impact remains unknown. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: mm/swapfile: skip HugeTLB pages for unuse_vma I got a bad pud error and lost a 1GB HugeTLB when calling swapoff. The problem can be reproduced by the following steps: 1. Allocate an anonymous 1GB HugeTLB and some other anonymous memory. 2. Swapout the above anonymous memory. 3. run swapoff and we will get a bad pud error in kernel message: mm/pgtable-generic.c:42: bad pud 00000000743d215d(84000001400000e7) We can tell that pud_clear_bad is called by pud_none_or_clear_bad in unuse_pud_range() by ftrace. And therefore the HugeTLB pages will never be freed because we lost it from page table. We can skip HugeTLB pages for unuse_vma to fix it.

The advisory is shared for download at git.kernel.org. This vulnerability is handled as CVE-2024-50199 since 10/21/2024. The exploitation is known to be difficult. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 213056 (Oracle Linux 7 / 8 : Unbreakable Enterprise kernel (ELSA-2024-12884)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.10.228, 5.15.169, 6.1.114, 6.6.58 or 6.11.5 eliminates this vulnerability. Applying the patch 417d5838ca73/e41710f5a61a/6ec0fe3756f9/bed2b9037806/eb66a833cdd2/7528c4fb1237 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (213056). Once again VulDB remains the best source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.0
VulDB Meta Temp Score: 4.9

VulDB Base Score: 4.6
VulDB Temp Score: 4.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Allocation of resources
CWE: CWE-770 / CWE-400 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 213056
Nessus Name: Oracle Linux 7 / 8 : Unbreakable Enterprise kernel (ELSA-2024-12884)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 5.10.228/5.15.169/6.1.114/6.6.58/6.11.5
Patch: 417d5838ca73/e41710f5a61a/6ec0fe3756f9/bed2b9037806/eb66a833cdd2/7528c4fb1237

Timelineinfo

10/21/2024 🔍
11/08/2024 +18 days 🔍
11/08/2024 +0 days 🔍
10/08/2025 +334 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2024-50199 (🔍)
GCVE (CVE): GCVE-0-2024-50199
GCVE (VulDB): GCVE-100-283532

Entryinfo

Created: 11/08/2024 08:11
Updated: 10/08/2025 20:56
Changes: 11/08/2024 08:11 (58), 12/17/2024 04:32 (2), 10/08/2025 20:56 (12)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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