Linux Kernel up to 6.12.107/6.18.48/7.1.12/7.2.2 gtp gtp_pdp_add/gtp_genl_del_pdp/gtp_dellink race condition

CVSS Meta Temp Score
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CTI Interest Score
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9.5$0-$5k0.00

Summaryinfo

A vulnerability has been found in Linux Kernel up to 6.12.107/6.18.48/7.1.12/7.2.2 and classified as very critical. This issue affects the function gtp_pdp_add/gtp_genl_del_pdp/gtp_dellink of the component gtp. Performing a manipulation results in race condition. This vulnerability is cataloged as CVE-2026-80851. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability, which was classified as very critical, was found in Linux Kernel up to 6.12.107/6.18.48/7.1.12/7.2.2. This affects the function gtp_pdp_add/gtp_genl_del_pdp/gtp_dellink of the component gtp. The manipulation with an unknown input leads to a race condition vulnerability. CWE is classifying the issue as 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. 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: gtp: serialize PDP context updates PDP contexts can be deleted through GTP_CMD_DELPDP or while the GTP network device is being unregistered. The latter is serialized by RTNL, but the generic-netlink delete path only holds RCU. Running both paths concurrently can therefore make both paths delete the same PDP context. The issue was found through static analysis and reproduced on a KASAN-enabled kernel by a simple two-thread program racing GTP_CMD_DELPDP against RTM_DELLINK: Oops: general protection fault, probably for non-canonical address KASAN: maybe wild-memory-access in range [0xdead000000000120-0xdead000000000127] RIP: gtp_genl_del_pdp+0x1c1/0x420 [gtp] RBP: dead000000000122 The second deletion dereferenced the poisoned hlist pprev pointer. Serialize gtp_pdp_add(), gtp_genl_del_pdp(), and gtp_dellink() with a shared mutex. Keep the mutex held until the final use of a PDP context in the NEWPDP path, and keep the RCU read-side section around the complete PDP context use in the DELPDP path.

It is possible to read the advisory at git.kernel.org. This vulnerability is uniquely identified as CVE-2026-80851 since 08/26/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/04/2026).

Upgrading to version 6.12.108, 6.18.49, 7.1.13, 7.2.3 or 7.3-rc1 eliminates this vulnerability. Applying the patch 5f77ddb2756340c1b05381674ca025d52998005e/3d950e98f74af9611925a5226edced02155f6ed1/6df4f05bc2991467939d7d80b6f7e121559cc3df/1e995498d29784a06a2b2899370a1926cfc8410d/498386b6d402737db1e2eeed4c385acbf0ef9e34 is able to eliminate this problem.

Be aware that VulDB is the high quality source for vulnerability data.

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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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

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 6.12.108/6.18.49/7.1.13/7.2.3/7.3-rc1
Patch: 5f77ddb2756340c1b05381674ca025d52998005e/3d950e98f74af9611925a5226edced02155f6ed1/6df4f05bc2991467939d7d80b6f7e121559cc3df/1e995498d29784a06a2b2899370a1926cfc8410d/498386b6d402737db1e2eeed4c385acbf0ef9e34

Timelineinfo

08/26/2026 CVE reserved
09/04/2026 +9 days Advisory disclosed
09/04/2026 +0 days VulDB entry created
09/04/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-80851 (🔒)
GCVE (CVE): GCVE-0-2026-80851
GCVE (VulDB): GCVE-100-398919

Entryinfo

Created: 09/04/2026 18:17
Changes: 09/04/2026 18:17 (59)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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