Linux Kernel up to 6.6.156/6.12.109/6.18.51/7.2.5 md/raid1 raid1_takeover allocation of resources

CVSS Meta Temp Score
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CTI Interest Score
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4.7$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 6.6.156/6.12.109/6.18.51/7.2.5. It has been declared as problematic. The impacted element is the function raid1_takeover of the component md/raid1. The manipulation results in allocation of resources. This vulnerability is identified as CVE-2026-90275. The attack can be executed remotely. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Linux Kernel up to 6.6.156/6.12.109/6.18.51/7.2.5. Affected is the function raid1_takeover of the component md/raid1. The manipulation with an unknown input leads to a allocation of resources vulnerability. CWE is classifying the issue as 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. This is going to have an impact on availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: md/raid1: don't set array_frozen in raid1_takeover() raid1_takeover() sets conf->array_frozen = 1 on the newly-allocated r1conf and nothing ever clears it, so every I/O to the array stalls permanently once _wait_barrier() sees it stuck at 1. This used to be harmless: level_store() called mddev_resume() right after pers->run(), which called raid1_quiesce(mddev, 0) and cleared array_frozen back to 0 regardless of what raid1_takeover() set. Commit b39f35ebe86d ("md: don't quiesce in mddev_suspend()") removed that quiesce(mddev, 0) call, so the pre-set now sticks. setup_conf() already zero-initializes the new r1conf via kzalloc, so just don't set array_frozen here. Same class of bug as commit 892da88d1cd9 ("md/raid10: fix a 'conf->barrier' leakage in raid10_takeover()"), also triggered by b39f35ebe86d.

The advisory is shared for download at git.kernel.org. This vulnerability is traded as CVE-2026-90275 since 09/11/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation needs additional levels of successful authentication. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1499.

Upgrading to version 6.6.157, 6.12.110, 6.18.52, 7.2.6 or 7.3-rc1 eliminates this vulnerability. Applying the patch 668d99ba47210ab6ceb18f1cf022c0accca7e3bb/c57ec2749ee03cace564eec7bb37c89dc3d8d47b/f9cdb5bb8efbf401e84d850828271af87e6be2dc/b6ec4bf1ec4446c0213c08ea493e48e6b83cd1af/dc386aa0ac0a3ec06c9a3ea9b064b073fb72a916 is able to eliminate this problem. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.9
VulDB Meta Temp Score: 4.7

VulDB Base Score: 4.9
VulDB Temp Score: 4.7
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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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: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.6.157/6.12.110/6.18.52/7.2.6/7.3-rc1
Patch: 668d99ba47210ab6ceb18f1cf022c0accca7e3bb/c57ec2749ee03cace564eec7bb37c89dc3d8d47b/f9cdb5bb8efbf401e84d850828271af87e6be2dc/b6ec4bf1ec4446c0213c08ea493e48e6b83cd1af/dc386aa0ac0a3ec06c9a3ea9b064b073fb72a916

Timelineinfo

09/11/2026 CVE reserved
09/17/2026 +6 days Advisory disclosed
09/17/2026 +0 days VulDB entry created
09/17/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-90275 (🔒)
GCVE (CVE): GCVE-0-2026-90275
GCVE (VulDB): GCVE-100-406776

Entryinfo

Created: 09/17/2026 21:06
Changes: 09/17/2026 21:06 (59)
Complete: 🔍
Cache ID: 216::103

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