VulnerabilityPublished 31 Jan 2026Updated 22 Aug 2026

CVE-2026-23033: Linux kernel · dmaengine: omap-dma: fix dma_pool resource leak in error paths

Affects Linux kernelSource GCVE Database

Not known to be exploited · fixed in 5.15.0-1105.112~20.04.1 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 10:12 UTC

Severity

Medium

Rated by Threat Radar · No CVSS score from NVD or the CNA

EPSS: 0.2% chance of exploitation in 30 days – higher than 13% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 5.15.0-1105.112~20.04.1, 5.15.0-1110.119~20.04.1, 5.15.0-1106.115~20.04.1 +59

Exploitation evidence

Disclosed: evidence found.
CVE published 31 Jan 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
Ubuntu 25.10linux`pkg:deb/ubuntu/linux@6.17.0-40.40?arch=source&distro=questing`Other threats	Affected 6.14.0-15.15 – 6.17.0-40.40 20 affected builds	Fixed in–
Ubuntu 25.10linux-aws`pkg:deb/ubuntu/linux-aws@6.17.0-1019.19?arch=source&distro=questing`Other threats	Affected 6.14.0-1005.5 – 6.17.0-1019.19 17 affected builds	Fixed in–
Ubuntu 25.10linux-azure`pkg:deb/ubuntu/linux-azure@6.17.0-1020.20?arch=source&distro=questing`Other threats	Affected 6.14.0-1004.4 – 6.17.0-1020.20 16 affected builds	Fixed in–
Ubuntu 25.10linux-azure-fde`pkg:deb/ubuntu/linux-azure-fde@6.17.0-1017.17?arch=source&distro=questing`Other threats	Affected 6.17.0-1003.3 – 6.17.0-1017.17 10 affected builds	Fixed in–
Ubuntu 25.10linux-gcp`pkg:deb/ubuntu/linux-gcp@6.17.0-1020.22?arch=source&distro=questing`Other threats	Affected 6.14.0-1006.6 – 6.17.0-1020.22 17 affected builds	Fixed in–
Ubuntu 25.10linux-oracle`pkg:deb/ubuntu/linux-oracle@6.17.0-1018.18?arch=source&distro=questing`Other threats	Affected 6.14.0-1005.5 – 6.17.0-1018.18 16 affected builds	Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

An official fix is available and has been released by the vendor. Users should update their Linux kernel packages to the patched versions listed in the Ubuntu security advisories USN-8162-1 and USN-8180-1. After updating, a system reboot is required to apply the changes. Due to an ABI change, recompilation and reinstallation of any third-party kernel modules are necessary. No additional mitigations are specified or required beyond applying the official updates.

Description

A resource leak vulnerability in the Linux kernel's dmaengine subsystem related to the omap-dma driver has been fixed. The issue involved the dma_pool resource not being properly destroyed in error paths during device registration, leading to resource leaks. This flaw has been resolved by adding proper cleanup calls in the error handling code. The vulnerability affects multiple versions of the Linux kernel prior to specific patched releases. The vendor has released official fixes, and users are advised to update to the corrected kernel versions and reboot to apply changes. Due to an ABI change, recompilation of third-party kernel modules may be necessary after updating.

Impact

The vulnerability causes resource leaks in the kernel's DMA engine subsystem during error handling in device registration. While this does not directly lead to code execution or privilege escalation, resource leaks can degrade system stability and reliability, potentially leading to denial of service conditions if exploited repeatedly. The vendor advisory notes that attackers could possibly use some of the fixed issues to compromise the system, but this specific resource leak primarily impacts resource management.

Summary

The Linux kernel's dmaengine subsystem, specifically the omap-dma driver, contained a resource leak vulnerability where dma_pool objects created by dma_pool_create() were not destroyed if dma_async_device_register() or of_dma_controller_register() failed. This caused resource leaks in probe error paths. The issue was fixed by adding dma_pool_destroy() calls in these error paths to ensure proper release of allocated resources. This vulnerability was addressed as part of a broader set of Linux kernel security fixes released by Ubuntu, affecting multiple kernel subsystems. Official patches have been made available in updated kernel packages for Ubuntu 20.04 LTS and 22.04 LTS releases.

GCVE source: db.gcve.eu
OSV ID: UBUNTU-CVE-2026-23033
Osv Schema Version: 1.7.0
Ecosystems: Ubuntu:Pro:14.04:LTS, Ubuntu:Pro:16.04:LTS, Ubuntu:16.04:LTS, Ubuntu:Pro:FIPS:16.04:LTS, Ubuntu:Pro:18.04:LTS, Ubuntu:18.04:LTS, Ubuntu:Pro:FIPS-updates:18.04:LTS, Ubuntu:Pro:FIPS:18.04:LTS, Ubuntu:Pro:20.04:LTS, Ubuntu:20.04:LTS, Ubuntu:Pro:FIPS-updates:20.04:LTS, Ubuntu:Pro:FIPS:20.04:LTS, Ubuntu:22.04:LTS, Ubuntu:Nvidia-BlueField:22.04:LTS, Ubuntu:Pro:FIPS-preview:22.04:LTS, Ubuntu:Pro:FIPS-updates:22.04:LTS, Ubuntu:Pro:Realtime:22.04:LTS, Ubuntu:24.04:LTS, Ubuntu:Nvidia-BlueField:24.04:LTS, Ubuntu:Pro:FIPS-updates:24.04:LTS, Ubuntu:Pro:Realtime:24.04:LTS, Ubuntu:25.10

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 22 Aug 2026, 21:37 UTC

Technical details

References

Community reviews

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