Linux Kernel up to 6.6.152/6.12.104/6.18.45/7.1.9 ASoC sof_widget_setup_unlocked integer underflow

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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9.5$5k-$25k1.25

Summaryinfo

A vulnerability marked as very critical has been reported in Linux Kernel up to 6.6.152/6.12.104/6.18.45/7.1.9. Affected is the function sof_widget_setup_unlocked of the component ASoC. Performing a manipulation results in integer underflow. This vulnerability was named CVE-2026-80911. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability classified as very critical has been found in Linux Kernel up to 6.6.152/6.12.104/6.18.45/7.1.9. This affects the function sof_widget_setup_unlocked of the component ASoC. The manipulation with an unknown input leads to a integer underflow vulnerability. CWE is classifying the issue as CWE-191. The product subtracts one value from another, such that the result is less than the minimum allowable integer value, which produces a value that is not equal to the correct result. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: ASoC: SOF: sof-audio: Fix error path in sof_widget_setup_unlocked() If either tplg_ops->dai_config or widget_kcontrol_setup fail during widget setup we would double decrement the use_count of the widget because the sof_widget_free_unlocked() would be called twice, similarly the core_put would be invoked twice as well. Since the use_count and core_put() is handled within the widget_free function we need to return without falling through the pipe_widget_free label. The fixes tag is picked to the last change around this part of the code which is adequately old enough for backporting purposes.

It is possible to read the advisory at git.kernel.org. This vulnerability is uniquely identified as CVE-2026-80911 since 08/26/2026. 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 $5k-$25k at the moment (estimation calculated on 09/04/2026).

Upgrading to version 6.6.153, 6.12.105, 6.18.46 or 7.1.10 eliminates this vulnerability. Applying the patch b270ed327380428581bbcbd85707f62e942428d7/c06995637f6a4667f2b540ac65315bfc8196a099/8cba53b862e1437257ec206d303ff942684284f1/d48691e70d4a9434b71039d4ed12bb0df4601acf/e780e4917d43683224812400fe3dc4816fceba75 is able to eliminate this problem.

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: 9.9
VulDB Meta Temp Score: 9.5

VulDB Base Score: 9.9
VulDB Temp Score: 9.5
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: Integer underflow
CWE: CWE-191 / CWE-189
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 6.6.153/6.12.105/6.18.46/7.1.10
Patch: b270ed327380428581bbcbd85707f62e942428d7/c06995637f6a4667f2b540ac65315bfc8196a099/8cba53b862e1437257ec206d303ff942684284f1/d48691e70d4a9434b71039d4ed12bb0df4601acf/e780e4917d43683224812400fe3dc4816fceba75

Timelineinfo

08/26/2026 CVE reserved
09/04/2026 +9 days Advisory disclosed
09/04/2026 +0 days VulDB entry created
09/04/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-80911 (🔒)
GCVE (CVE): GCVE-0-2026-80911
GCVE (VulDB): GCVE-100-399123

Entryinfo

Created: 09/04/2026 19:50
Changes: 09/04/2026 19:50 (59)
Complete: 🔍
Cache ID: 216::103

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