Linux Kernel up to 6.12.102/6.18.43/7.1.7/7.2-rc5 nf_tables nft_obj_destroy/nft_rcv_nl_event/nft_obj_lookup use after free

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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9.5$5k-$25k0.00+

Summaryinfo

A vulnerability marked as very critical has been reported in Linux Kernel up to 6.12.102/6.18.43/7.1.7/7.2-rc5. The affected element is the function nft_obj_destroy/nft_rcv_nl_event/nft_obj_lookup of the component nf_tables. Performing a manipulation results in use after free. This vulnerability is identified as CVE-2026-74565. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability, which was classified as very critical, was found in Linux Kernel up to 6.12.102/6.18.43/7.1.7/7.2-rc5. This affects the function nft_obj_destroy/nft_rcv_nl_event/nft_obj_lookup of the component nf_tables. The manipulation with an unknown input leads to a use after free vulnerability. CWE is classifying the issue as CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. 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: netfilter: nf_tables: make nft_object rhltable per table The nft_object rhltable is global, this allows for accessing objects that are being dismangled from lookup path by other existing netns. Given the nft_obj_destroy() releases the object inmediately, this might lead to use-after-free of these objects that are being released. Make the existing rhltable per table to address this issue to deal with with the nft_rcv_nl_event() path too. Update nft_obj_lookup() to take the table as non-const, otherwise, compiler complains when passing the objname_ht to rhltable_lookup().

It is possible to read the advisory at git.kernel.org. This vulnerability is uniquely identified as CVE-2026-74565 since 08/15/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 08/15/2026).

Upgrading to version 6.12.103, 6.18.44, 7.1.8 or 7.2-rc6 eliminates this vulnerability. Applying the patch 1948e4f85b855618b5b9a27265f98d816f4cb7cb/63ba12b664a2cd3220ed43e22c717715f4cc2ae8/7d4789b58761d9d48d9b5f5e7e0a510c3bbfb3af/f4f699790590bd0896c48a71e9232a65198f92f0 is able to eliminate this problem.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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Version

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Website

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

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
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 6.12.103/6.18.44/7.1.8/7.2-rc6
Patch: 1948e4f85b855618b5b9a27265f98d816f4cb7cb/63ba12b664a2cd3220ed43e22c717715f4cc2ae8/7d4789b58761d9d48d9b5f5e7e0a510c3bbfb3af/f4f699790590bd0896c48a71e9232a65198f92f0

Timelineinfo

08/15/2026 Advisory disclosed
08/15/2026 +0 days CVE reserved
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-2026-74565 (🔒)
GCVE (CVE): GCVE-0-2026-74565
GCVE (VulDB): GCVE-100-390891

Entryinfo

Created: 08/15/2026 16:03
Changes: 08/15/2026 16:03 (59)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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