Linux Kernel up to 7.1.8 sch_cake net/sched/sch_cake.c resource consumption

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.2$0-$5k1.73

Summaryinfo

A vulnerability, which was classified as critical, was found in Linux Kernel up to 7.1.8. Affected by this issue is some unknown functionality of the file net/sched/sch_cake.c of the component sch_cake. The manipulation results in resource consumption. This vulnerability is cataloged as CVE-2026-74704. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in Linux Kernel up to 7.1.8. It has been classified as critical. Affected is some unknown functionality of the file net/sched/sch_cake.c of the component sch_cake. The manipulation with an unknown input leads to a resource consumption vulnerability. CWE is classifying the issue as CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. This is going to have an impact on availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: net/sched: sch_cake: drop WARN_ON(1) for malformed packets in ACK filter The sch_cake ACK filter parses packets to find the TCP header and filter duplicated ACKs if the flow is backlogged. The parsing code contains a WARN_ON(1) which can be triggered by a malformed IP header in certain cases. Depending on the system configuration, this leads either to either spamming dmesg with warnings, or a panic if panic_on_warn is set. The code already correctly skips the offending packet in the branch that triggers the warning, so the WARN_ON itself doesn't really serve any purpose. So just drop it altogether to avoid the inconvenient side effects.

The advisory is available at git.kernel.org. This vulnerability is traded as CVE-2026-74704 since 08/15/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. 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 08/22/2026). This vulnerability is assigned to T1499 by the MITRE ATT&CK project.

Upgrading to version 5.10.265, 5.15.216, 6.1.183, 6.6.152, 6.12.104, 6.18.45 or 7.1.9 eliminates this vulnerability. Applying the patch c1693b7844a6c06d31a565e5a494948034dfd235/a4b52612004a5639c4bfc30ba93ba414b8326e2a/ae1b2f8e21a41e7c7e75511bea0c4ccc59ec1bd3/0c4882bff34558d8d53fb04c3e96da5c327c7dc8/2504a76e5c0694e14e15562730e1339f2d9f9458/cd2f1d9fe8a507c2dc86ad326fe221f121c47734/a1ae353d8355407c1bea971d1c1af5e7f242bb7d/2a33516f9ef59ad11844d4fc152f889449b5daf3 is able to eliminate this problem.

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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: 7.5
VulDB Meta Temp Score: 7.2

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
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: Resource consumption
CWE: CWE-400 / CWE-404
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 5.10.265/5.15.216/6.1.183/6.6.152/6.12.104/6.18.45/7.1.9
Patch: c1693b7844a6c06d31a565e5a494948034dfd235/a4b52612004a5639c4bfc30ba93ba414b8326e2a/ae1b2f8e21a41e7c7e75511bea0c4ccc59ec1bd3/0c4882bff34558d8d53fb04c3e96da5c327c7dc8/2504a76e5c0694e14e15562730e1339f2d9f9458/cd2f1d9fe8a507c2dc86ad326fe221f121c47734/a1ae353d8355407c1bea971d1c1af5e7f242bb7d/2a33516f9ef59ad11844d4fc152f889449b5daf3

Timelineinfo

08/15/2026 CVE reserved
08/22/2026 +7 days Advisory disclosed
08/22/2026 +0 days VulDB entry created
08/22/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-74704 (🔒)
GCVE (CVE): GCVE-0-2026-74704
GCVE (VulDB): GCVE-100-394494

Entryinfo

Created: 08/22/2026 19:05
Changes: 08/22/2026 19:05 (59)
Complete: 🔍
Cache ID: 216::103

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