Linux Kernel up to 7.2.2 vsie privileges management

CVSS Meta Temp Score
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CTI Interest Score
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9.5$5k-$25k0.00+

Summaryinfo

A vulnerability identified as very critical has been detected in Linux Kernel up to 7.2.2. This issue affects some unknown processing of the component vsie. Performing a manipulation results in privileges management. This vulnerability was named CVE-2026-80921. The attack may be initiated remotely. There is no available exploit. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as very critical has been found in Linux Kernel up to 7.2.2. This affects some unknown functionality of the component vsie. The manipulation with an unknown input leads to a privileges management vulnerability. CWE is classifying the issue as CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. 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: KVM: s390: vsie: zero stale crypto bits When shadowing crypto access bits from a format0 apcb (crycb 0 or 1), the bits 64..255 are unchanged from whatever is in the vsie page in the crycb and thus in the apcb. This gives a nested guest potential access to a device no longer available. Zero out the remaining bits.

It is possible to read the advisory at git.kernel.org. This vulnerability is uniquely identified as CVE-2026-80921 since 08/26/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 09/09/2026). The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

Upgrading to version 5.10.269, 5.15.220, 6.1.187, 6.6.156, 6.12.108, 6.18.49, 7.1.13, 7.2.3 or 7.3-rc1 eliminates this vulnerability. Applying the patch d110b3297f11ef227098b8a82ade2d5f123b7d2f/59d51550b5cb916bda037673a721a404b3b47a0d/f6079dca67eccb5eabef9f72437948c66dc5131f/087c19cc60a8caa1a08e1e434c8be2caf6c27733/7d23489f51109e3ebba5b5db8c5f0185af7b7fdf/935eeba276012916c76243e5cbb843efd8fdb75d/d4bcd2df6d0d2af916b4fe1a533958778ea7c45b/29b4f7bc2991313bd3e6f6fb8fdf1b173f086dd6/34d5b5b646c91cfb9338d7a12c955a70ffb8c66b is able to eliminate this problem. The best possible mitigation is suggested to be upgrading to the latest version.

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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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💳💳💳💳💳💳
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Privileges management
CWE: CWE-269 / CWE-266
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 5.10.269/5.15.220/6.1.187/6.6.156/6.12.108/6.18.49/7.1.13/7.2.3/7.3-rc1
Patch: d110b3297f11ef227098b8a82ade2d5f123b7d2f/59d51550b5cb916bda037673a721a404b3b47a0d/f6079dca67eccb5eabef9f72437948c66dc5131f/087c19cc60a8caa1a08e1e434c8be2caf6c27733/7d23489f51109e3ebba5b5db8c5f0185af7b7fdf/935eeba276012916c76243e5cbb843efd8fdb75d/d4bcd2df6d0d2af916b4fe1a533958778ea7c45b/29b4f7bc2991313bd3e6f6fb8fdf1b173f086dd6/34d5b5b646c91cfb9338d7a12c955a70ffb8c66b

Timelineinfo

08/26/2026 CVE reserved
09/09/2026 +14 days Advisory disclosed
09/09/2026 +0 days VulDB entry created
09/09/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-80921 (🔒)
GCVE (CVE): GCVE-0-2026-80921
GCVE (VulDB): GCVE-100-401823

Entryinfo

Created: 09/09/2026 18:31
Changes: 09/09/2026 18:31 (58)
Complete: 🔍
Cache ID: 216::103

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