CVE-2026-72406 - Vulnerability Details

Description

In the Linux kernel, the following vulnerability has been resolved:

net: sungem: fix probe error cleanup

gem_init_one() calls gem_remove_one() when register_netdev() fails.
gem_remove_one() unregisters and frees resources owned by the net_device,
including the DMA block, MMIO mapping, PCI regions, and the net_device
itself. gem_init_one() then falls through to its own cleanup labels and
frees the same resources again.

Keep the register_netdev() error path in gem_init_one(): clear drvdata so
PM/remove paths do not see a half-registered device, remove the NAPI
instance added during probe, and let the existing cleanup labels release
the resources once.

The issue was found by a local static-analysis checker for probe error
paths. The reported path was manually inspected before sending this fix.

Compile-tested with CONFIG_SUNGEM=y. Runtime testing was not performed
because no sungem hardware is available.

Published: 2026-08-15

Score: 7.8 High

EPSS: < 1% Very Low

KEV: No

Impact:

Action:

Analysis

Impact

The Linux kernel sungem driver contains a flaw in its initialization routine: when register_netdev() fails, gem_init_one() calls gem_remove_one() to clean up resources and then continues through its own cleanup path which attempts to free the same resources again. This double free can corrupt kernel memory and may result in a system crash. The flaw involves the weakness CWE-1341.

Affected Systems

This vulnerability affects any Linux kernel that builds with CONFIG_SUNGEM=y. All versions of the kernel released before the patch commit referenced in the advisory are impacted. Systems that load the sungem module or that have sungem hardware present are susceptible.

Risk and Exploitability

The EPSS score is < 1%, indicating an extremely low probability of exploitation, while the CVSS score of 7.8 classifies it as high severity. The likely attack vector is local: an attacker who can load or probe the sungem driver—for example, by inserting compatible hardware or loading the module—could trigger the fault, potentially causing a system crash. No public exploit is known, and the flaw is mitigated by the patch commit.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Linux

unaffected

Version	Status	Constraints
`1da177e4c3f41524e886b7f1b8a0c1fc7321cac2`	affected	< f3bd60b26814b7c3c57c629abb0857dfc76d214a
`1da177e4c3f41524e886b7f1b8a0c1fc7321cac2`	affected	< f1d04fefb0c2a2de32d9cee22cdc2088be3758d1
`1da177e4c3f41524e886b7f1b8a0c1fc7321cac2`	affected	< 331c99029a1cee1111f82f63d15b3cdebefbd341
`1da177e4c3f41524e886b7f1b8a0c1fc7321cac2`	affected	< a63eaf7605d1579cf3f551792e478cfaf5ac37d1
`1da177e4c3f41524e886b7f1b8a0c1fc7321cac2`	affected	< fb73cdc50b6755e5c3a80a195b2708a39ada0230
`1da177e4c3f41524e886b7f1b8a0c1fc7321cac2`	affected	< b15a3cc68e2450aa0edd94a74a7bdd45fcc17dd9
`1da177e4c3f41524e886b7f1b8a0c1fc7321cac2`	affected	< bc49e8746584564dba47d963d1916cc876fc6f6b
`1da177e4c3f41524e886b7f1b8a0c1fc7321cac2`	affected	< 36dea2f639249460d13f6ca66b2a9064187cd34d

Linux

affected

Version	Status	Constraints
`2.6.12`	affected	—
`0`	unaffected	< 2.6.12
`5.10.261`	unaffected	≤ 5.10.*
`5.15.212`	unaffected	≤ 5.15.*
`6.1.178`	unaffected	≤ 6.1.*
`6.6.145`	unaffected	≤ 6.6.*
`6.12.97`	unaffected	≤ 6.12.*
`6.18.40`	unaffected	≤ 6.18.*
`7.1.5`	unaffected	≤ 7.1.*
`7.2`	unaffected	≤ *

No data.

Vendor Product Confidence Versions

Linux

Linux Kernel

99%

Version	Status	Scheme	Platform
`[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,f3bd60b26814b7c3c57c629abb0857dfc76d214a)`	affected	code_commit	—
`[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,f1d04fefb0c2a2de32d9cee22cdc2088be3758d1)`	affected	code_commit	—
`[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,331c99029a1cee1111f82f63d15b3cdebefbd341)`	affected	code_commit	—
`[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,a63eaf7605d1579cf3f551792e478cfaf5ac37d1)`	affected	code_commit	—
`[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,fb73cdc50b6755e5c3a80a195b2708a39ada0230)`	affected	code_commit	—
`[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,b15a3cc68e2450aa0edd94a74a7bdd45fcc17dd9)`	affected	code_commit	—
`[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,bc49e8746584564dba47d963d1916cc876fc6f6b)`	affected	code_commit	—
`[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,36dea2f639249460d13f6ca66b2a9064187cd34d)`	affected	code_commit	—

Linux

Linux Kernel

99%

Version	Status	Scheme	Platform
`[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,f3bd60b26814b7c3c57c629abb0857dfc76d214a)`	affected	code_commit	—
`[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,f1d04fefb0c2a2de32d9cee22cdc2088be3758d1)`	affected	code_commit	—
`[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,331c99029a1cee1111f82f63d15b3cdebefbd341)`	affected	code_commit	—
`[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,a63eaf7605d1579cf3f551792e478cfaf5ac37d1)`	affected	code_commit	—
`[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,fb73cdc50b6755e5c3a80a195b2708a39ada0230)`	affected	code_commit	—
`[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,b15a3cc68e2450aa0edd94a74a7bdd45fcc17dd9)`	affected	code_commit	—
`[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,bc49e8746584564dba47d963d1916cc876fc6f6b)`	affected	code_commit	—
`[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,36dea2f639249460d13f6ca66b2a9064187cd34d)`	affected	code_commit	—
`[2.6.12,2.6.12]`	affected	semver	—
`[0,2.6.12)`	unaffected	semver	—
`[5.10.261,5.11.0)`	unaffected	semver	—
`[5.15.212,5.16.0)`	unaffected	semver	—
`[6.1.178,6.2.0)`	unaffected	semver	—
`[6.6.145,6.7.0)`	unaffected	semver	—
`[6.12.97,6.13.0)`	unaffected	semver	—
`[6.18.40,6.19.0)`	unaffected	semver	—
`[7.1.5,7.2.0)`	unaffected	semver	—
`[7.2-rc1,*]`	unaffected	generic	—

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Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

Apply the kernel update that contains commit 331c99029a1cee1111f82f63d15b3cdebefbd341.
For systems that do not use sangem hardware, disable the module by blacklisting it or setting CONFIG_SUNGEM=n in the kernel configuration.
For custom kernel builds, cherry‑pick the patch commit into the tree and rebuild the kernel with the fix applied.

Generated by OpenCVE AI on August 22, 2026 at 06:45 UTC.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00164.

Key SSVC decision points have not yet been added.

References

Link	Providers
https://git.kernel.org/stable/c/331c99029a1cee1111f82f63d15b3cdebefbd341
https://git.kernel.org/stable/c/36dea2f639249460d13f6ca66b2a9064187cd34d
https://git.kernel.org/stable/c/a63eaf7605d1579cf3f551792e478cfaf5ac37d1
https://git.kernel.org/stable/c/b15a3cc68e2450aa0edd94a74a7bdd45fcc17dd9
https://git.kernel.org/stable/c/bc49e8746584564dba47d963d1916cc876fc6f6b
https://git.kernel.org/stable/c/f1d04fefb0c2a2de32d9cee22cdc2088be3758d1
https://git.kernel.org/stable/c/f3bd60b26814b7c3c57c629abb0857dfc76d214a
https://git.kernel.org/stable/c/fb73cdc50b6755e5c3a80a195b2708a39ada0230
https://lore.kernel.org/linux-cve-announce/2026081522-CVE-2026-72406-eb42@gregkh/T
https://nvd.nist.gov/vuln/detail/CVE-2026-72406
https://www.cve.org/CVERecord?id=CVE-2026-72406

History

Sat, 22 Aug 2026 05:45:00 +0000

Type	Values Removed	Values Added
Weaknesses	CWE-415

Thu, 20 Aug 2026 00:15:00 +0000

Type	Values Removed	Values Added
Weaknesses		CWE-1341
References		https://lore.kernel.org/linux-cve-announce/2026081522-CVE-2026-72406-eb42@gregkh/T https://nvd.nist.gov/vuln/detail/CVE-2026-72406 https://www.cve.org/CVERecord?id=CVE-2026-72406
Metrics	threat_severity `None`	threat_severity `Moderate`

Mon, 17 Aug 2026 18:15:00 +0000

Type	Values Removed	Values Added
Weaknesses		CWE-415

Mon, 17 Aug 2026 16:15:00 +0000

Type	Values Removed	Values Added
Weaknesses	CWE-415

Mon, 17 Aug 2026 06:00:00 +0000

Type	Values Removed	Values Added
Metrics		cvssV3_1 `{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}`

Sat, 15 Aug 2026 19:00:00 +0000

Type	Values Removed	Values Added
Weaknesses		CWE-415

Sat, 15 Aug 2026 06:00:00 +0000

Type	Values Removed	Values Added
Description		In the Linux kernel, the following vulnerability has been resolved: net: sungem: fix probe error cleanup gem_init_one() calls gem_remove_one() when register_netdev() fails. gem_remove_one() unregisters and frees resources owned by the net_device, including the DMA block, MMIO mapping, PCI regions, and the net_device itself. gem_init_one() then falls through to its own cleanup labels and frees the same resources again. Keep the register_netdev() error path in gem_init_one(): clear drvdata so PM/remove paths do not see a half-registered device, remove the NAPI instance added during probe, and let the existing cleanup labels release the resources once. The issue was found by a local static-analysis checker for probe error paths. The reported path was manually inspected before sending this fix. Compile-tested with CONFIG_SUNGEM=y. Runtime testing was not performed because no sungem hardware is available.
Title		net: sungem: fix probe error cleanup
First Time appeared		Linux Linux linux Kernel
CPEs		cpe:2.3:o:linux:linux_kernel::::::::
Vendors & Products		Linux Linux linux Kernel
References		https://git.kernel.org/stable/c/331c99029a1cee1111f82f63d15b3cdebefbd341 https://git.kernel.org/stable/c/36dea2f639249460d13f6ca66b2a9064187cd34d https://git.kernel.org/stable/c/a63eaf7605d1579cf3f551792e478cfaf5ac37d1 https://git.kernel.org/stable/c/b15a3cc68e2450aa0edd94a74a7bdd45fcc17dd9 https://git.kernel.org/stable/c/bc49e8746584564dba47d963d1916cc876fc6f6b https://git.kernel.org/stable/c/f1d04fefb0c2a2de32d9cee22cdc2088be3758d1 https://git.kernel.org/stable/c/f3bd60b26814b7c3c57c629abb0857dfc76d214a https://git.kernel.org/stable/c/fb73cdc50b6755e5c3a80a195b2708a39ada0230

Subscriptions

Linux Linux Kernel

MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2026-08-15T05:56:30.225Z

Updated: 2026-08-17T05:43:46.309Z

Reserved: 2026-08-09T03:40:39.926Z

Link: CVE-2026-72406

Vulnrichment

No data.

NVD

Status : Received

Published: 2026-08-15T06:22:14.177

Modified: 2026-08-17T06:19:07.287

Link: CVE-2026-72406

Redhat

Severity : Moderate

Publid Date: 2026-08-15T00:00:00Z

Links: CVE-2026-72406 - Bugzilla

OpenCVE Enrichment

Updated: 2026-08-22T07:00:07Z

Weaknesses

CWE-1341
Multiple Releases of Same Resource or Handle

Impact

Affected Systems

Risk and Exploitability

Tracking

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

Subscriptions

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