Linux Kernel up to 7.1.4 ipset kfree_rcu/rcu_assign_pointer race condition

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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9.5$0-$5k0.00

Summaryinfo

A vulnerability labeled as very critical has been found in Linux Kernel up to 7.1.4. This affects the function kfree_rcu/rcu_assign_pointer of the component ipset. Executing a manipulation can lead to race condition. This vulnerability is registered as CVE-2026-72435. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability was found in Linux Kernel up to 7.1.4. It has been declared as very critical. This vulnerability affects the function kfree_rcu/rcu_assign_pointer of the component ipset. The manipulation with an unknown input leads to a race condition vulnerability. The CWE definition for the vulnerability is CWE-362. The product contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: netfilter: ipset: fix order of kfree_rcu() and rcu_assign_pointer() Sashiko pointed out that kfree_rcu() was called before rcu_assign_pointer() in handling the comment extension. Fix the order so that rcu_assign_pointer() called first.

The advisory is available at git.kernel.org. This vulnerability was named CVE-2026-72435 since 08/09/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. 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 08/15/2026).

Upgrading to version 5.10.261, 5.15.212, 6.1.178, 6.6.145, 6.12.97, 6.18.40, 7.1.5 or 7.2-rc1 eliminates this vulnerability. Applying the patch c9787d7c24ffd83019f379455e1b97fb4f0f75eb/6e98407cb94e035bba98956adc9096a76d8b2a9f/50b70f56f3baaff46599f59b2d93fa2540120776/d01b4b471f0fc5c396af62845e972ccf99cee29a/fcb565966534909377a16be5f7b065db2e25c8b5/8087bb360a936a6314d22b567e4b861656943eb6/93a775fd67f3ef34949a9523bfa69403ee74efdd/3ca9982a8882470aa0ac4e8bb9a552b181d1efcd 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: 10.0
VulDB Meta Temp Score: 9.5

VulDB Base Score: 10.0
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: Race condition
CWE: CWE-362
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 5.10.261/5.15.212/6.1.178/6.6.145/6.12.97/6.18.40/7.1.5/7.2-rc1
Patch: c9787d7c24ffd83019f379455e1b97fb4f0f75eb/6e98407cb94e035bba98956adc9096a76d8b2a9f/50b70f56f3baaff46599f59b2d93fa2540120776/d01b4b471f0fc5c396af62845e972ccf99cee29a/fcb565966534909377a16be5f7b065db2e25c8b5/8087bb360a936a6314d22b567e4b861656943eb6/93a775fd67f3ef34949a9523bfa69403ee74efdd/3ca9982a8882470aa0ac4e8bb9a552b181d1efcd

Timelineinfo

08/09/2026 CVE reserved
08/15/2026 +6 days Advisory disclosed
08/15/2026 +0 days VulDB entry created
08/15/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-72435 (🔒)
GCVE (CVE): GCVE-0-2026-72435
GCVE (VulDB): GCVE-100-391030

Entryinfo

Created: 08/15/2026 17:10
Changes: 08/15/2026 17:10 (59)
Complete: 🔍
Cache ID: 216::103

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