Linux Kernel up to 7.0.6 8021q vlan_dev_set_egress_priority privilege escalation

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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4.9$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 7.0.6. It has been declared as critical. The affected element is the function vlan_dev_set_egress_priority of the component 8021q. Such manipulation leads to an unknown weakness. This vulnerability is referenced as CVE-2026-46153. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel up to 7.0.6. Affected by this issue is the function vlan_dev_set_egress_priority of the component 8021q. The impact remains unknown. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: 8021q: delete cleared egress QoS mappings vlan_dev_set_egress_priority() currently keeps cleared egress priority mappings in the hash as tombstones. Repeated set/clear cycles with distinct skb priorities therefore accumulate mapping nodes until device teardown and leak memory. Delete mappings when vlan_prio is cleared instead of keeping tombstones. Now that the egress mapping lists are RCU protected, the node can be unlinked safely and freed after a grace period.

The advisory is shared for download at git.kernel.org. This vulnerability is handled as CVE-2026-46153 since 05/13/2026. The exploitation is known to be difficult. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 06/10/2026).

Upgrading to version 7.0.7 or 7.1-rc1 eliminates this vulnerability. Applying the patch a52e122c9e4d56ad9a03b32c915a199276d989c3/7dddc74af369478ba7f9bc136d0fc1dc4570cb66 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.

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.0
VulDB Meta Temp Score: 4.9

VulDB Base Score: 4.6
VulDB Temp Score: 4.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔒

CVSSv2info

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

Exploitinginfo

Class: Privilege escalation
CWE: Unknown
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

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 7.0.7/7.1-rc1
Patch: a52e122c9e4d56ad9a03b32c915a199276d989c3/7dddc74af369478ba7f9bc136d0fc1dc4570cb66

Timelineinfo

05/13/2026 CVE reserved
05/28/2026 +15 days Advisory disclosed
05/28/2026 +0 days VulDB entry created
06/10/2026 +13 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-46153 (🔒)
GCVE (CVE): GCVE-0-2026-46153
GCVE (VulDB): GCVE-100-366680

Entryinfo

Created: 05/28/2026 13:38
Updated: 06/10/2026 10:15
Changes: 05/28/2026 13:38 (58), 06/10/2026 10:15 (11)
Complete: 🔍
Cache ID: 216::103

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