Linux Kernel up to 6.6.156/6.12.109/6.18.51/7.2.5 irqchip/renesas-irqc irq_domain_remove memory leak

CVSS Meta Temp Score
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CTI Interest Score
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5.2$0-$5k0.00+

Summaryinfo

A vulnerability identified as problematic has been detected in Linux Kernel up to 6.6.156/6.12.109/6.18.51/7.2.5. Impacted is the function irq_domain_remove of the component irqchip/renesas-irqc. Performing a manipulation results in memory leak. This vulnerability is known as CVE-2026-93072. Remote exploitation of the attack is possible. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in Linux Kernel up to 6.6.156/6.12.109/6.18.51/7.2.5. This affects the function irq_domain_remove of the component irqchip/renesas-irqc. The manipulation with an unknown input leads to a memory leak vulnerability. CWE is classifying the issue as CWE-401. The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory. This is going to have an impact on integrity, and availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: irqchip/renesas-irqc: Fix generic interrupt chip leak on remove The driver allocates domain generic chips probe. However, on driver removal, the generic chips are not automatically freed when the interrupt domain is removed because the domain flags do not include IRQ_DOMAIN_FLAG_DESTROY_GC. This causes both the domain generic chips structure and the associated generic chips to be leaked. Additionally, the generic chips remain on the global list and may later be accessed by generic interrupt chip suspend, resume, or shutdown callbacks after the driver has been removed, potentially resulting in a use-after-free and kernel crash. Fix the resource leak by setting IRQ_DOMAIN_FLAG_DESTROY_GC on the interrupt domain; this lets the interrupt domain core automatically release all generic chips when irq_domain_remove() is invoked, removing the need for manual cleanup calls in error paths and remove callback.

It is possible to read the advisory at git.kernel.org. This vulnerability is uniquely identified as CVE-2026-93072 since 09/17/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/17/2026). The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

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 3d39757ef791f90028da9c8b7c1fbbb497237e58/4bf7614d048434326081eef0ebef33cb77fe2ffc/9acc996cb2e8477ae81bd7c067fec15202d6bc89/7c614f83301d464e2fb498d63552490d137ea10d/616dd89d81ad9a3cf1cfff4088a4c43e4e00d6ba is able to eliminate this problem. The best possible mitigation is suggested to be upgrading to the latest version.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.2

VulDB Base Score: 5.4
VulDB Temp Score: 5.2
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: Memory leak
CWE: CWE-401 / 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: 3d39757ef791f90028da9c8b7c1fbbb497237e58/4bf7614d048434326081eef0ebef33cb77fe2ffc/9acc996cb2e8477ae81bd7c067fec15202d6bc89/7c614f83301d464e2fb498d63552490d137ea10d/616dd89d81ad9a3cf1cfff4088a4c43e4e00d6ba

Timelineinfo

09/17/2026 Advisory disclosed
09/17/2026 +0 days CVE reserved
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-2026-93072 (🔒)
GCVE (CVE): GCVE-0-2026-93072
GCVE (VulDB): GCVE-100-407115

Entryinfo

Created: 09/17/2026 23:14
Changes: 09/17/2026 23:14 (59)
Complete: 🔍
Cache ID: 216::103

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