Linux Kernel up to 6.19.5 usb_tx_block state issue

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.6$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in Linux Kernel up to 6.19.5. This affects the function usb_tx_block. Such manipulation leads to state issue. This vulnerability is listed as CVE-2026-43255. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.19.5 and classified as critical. Affected by this issue is the function usb_tx_block. The manipulation with an unknown input leads to a state issue vulnerability. Using CWE to declare the problem leads to CWE-371. Impacted is confidentiality, integrity, and availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: wifi: libertas: fix WARNING in usb_tx_block The function usb_tx_block() submits cardp->tx_urb without ensuring that any previous transmission on this URB has completed. If a second call occurs while the URB is still active (e.g. during rapid firmware loading), usb_submit_urb() detects the active state and triggers a warning: 'URB submitted while active'. Fix this by enforcing serialization: call usb_kill_urb() before submitting the new request. This ensures the URB is idle and safe to reuse.

The advisory is available at git.kernel.org. This vulnerability is handled as CVE-2026-43255 since 05/01/2026. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 05/30/2026).

The vulnerability scanner Nessus provides a plugin with the ID 317729 (SUSE SLES12 Security Update : kernel (SUSE-SU-2026:2068-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.10.252, 5.15.202, 6.1.165, 6.6.128, 6.12.75, 6.18.16 or 6.19.6 eliminates this vulnerability. Applying the patch 498525d8358d6d20918787e59736d5b6a021e9fd/2902a9b4415a6bafc9b1e5dd360f065d757a0bb7/948a39c95d0f8d73722910f8cdb7b6e3e9206232/5bfb25495e391a1be0db94b15715174fa06b93a1/b82073564373e68c6ae3a96039fae14cd002a496/3308c7504e093b22e91a4468470309cee2e26b83/fc188b44547dea4e7350833171982a6312befde9/d66676e6ca96bf8680f869a9bd6573b26c634622 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (317729). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.0
VulDB Meta Temp Score: 7.6

VulDB Base Score: 8.0
VulDB Temp Score: 7.6
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: State issue
CWE: CWE-371
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 317729
Nessus Name: SUSE SLES12 Security Update : kernel (SUSE-SU-2026:2068-1)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 5.10.252/5.15.202/6.1.165/6.6.128/6.12.75/6.18.16/6.19.6
Patch: 498525d8358d6d20918787e59736d5b6a021e9fd/2902a9b4415a6bafc9b1e5dd360f065d757a0bb7/948a39c95d0f8d73722910f8cdb7b6e3e9206232/5bfb25495e391a1be0db94b15715174fa06b93a1/b82073564373e68c6ae3a96039fae14cd002a496/3308c7504e093b22e91a4468470309cee2e26b83/fc188b44547dea4e7350833171982a6312befde9/d66676e6ca96bf8680f869a9bd6573b26c634622

Timelineinfo

05/01/2026 CVE reserved
05/06/2026 +5 days Advisory disclosed
05/06/2026 +0 days VulDB entry created
05/30/2026 +24 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-43255 (🔒)
GCVE (CVE): GCVE-0-2026-43255
GCVE (VulDB): GCVE-100-361418

Entryinfo

Created: 05/06/2026 16:35
Updated: 05/30/2026 14:41
Changes: 05/06/2026 16:35 (58), 05/30/2026 14:41 (2)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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