Linux Kernel up to 6.12.107/6.18.48/7.1.12/7.2.2 nvme-tcp race condition

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.2$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic was found in Linux Kernel up to 6.12.107/6.18.48/7.1.12/7.2.2. Affected is an unknown function of the component nvme-tcp. The manipulation results in race condition. This vulnerability was named CVE-2026-80862. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.12.107/6.18.48/7.1.12/7.2.2. It has been classified as problematic. Affected is an unknown function of the component nvme-tcp. 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 integrity, and availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: nvme-tcp: fix usage of page_frag_cache nvme uses page_frag_cache to preallocate PDU for each preallocated request of block device. Block devices are created in parallel threads, consequently page_frag_cache is used in not thread-safe manner. That leads to incorrect refcounting of backstore pages and premature free. That can be catched by !sendpage_ok inside network stack: WARNING: CPU: 7 PID: 467 at ../net/core/skbuff.c:6931 skb_splice_from_iter+0xfa/0x310. tcp_sendmsg_locked+0x782/0xce0 tcp_sendmsg+0x27/0x40 sock_sendmsg+0x8b/0xa0 nvme_tcp_try_send_cmd_pdu+0x149/0x2a0 Then random panic may occur. Fix that by serializing the usage of page_frag_cache.

The advisory is available at git.kernel.org. This vulnerability is traded as CVE-2026-80862 since 08/26/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of 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 d19f98c79f1b7e09e4cdf5c20d626e571e487467/64561afb42d8390695bf810d9bbd087cbca00291/0a9750263ffacbbd2048a391fd4bd22e2146c57d/6e4cf281558709b92ec2ca3054fe2ffc69266ef9/36ac05f7cfd59d90c597071304b14e98090d5dd1 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: 5.4
VulDB Meta Temp Score: 5.2

VulDB Base Score: 5.4
VulDB Temp Score: 5.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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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: d19f98c79f1b7e09e4cdf5c20d626e571e487467/64561afb42d8390695bf810d9bbd087cbca00291/0a9750263ffacbbd2048a391fd4bd22e2146c57d/6e4cf281558709b92ec2ca3054fe2ffc69266ef9/36ac05f7cfd59d90c597071304b14e98090d5dd1

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-2026-80862 (🔒)
GCVE (CVE): GCVE-0-2026-80862
GCVE (VulDB): GCVE-100-398958

Entryinfo

Created: 09/04/2026 18:33
Changes: 09/04/2026 18:33 (58)
Complete: 🔍
Cache ID: 216::103

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