Linux Kernel up to 6.12.110/6.18.52/7.2.6/7.3-rc1 BPF bpf_get_stack/bpf_get_task_stack race condition

CVSS Meta Temp Score
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CTI Interest Score
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7.8$0-$5k0.00+

Summaryinfo

A vulnerability has been found in Linux Kernel up to 6.12.110/6.18.52/7.2.6/7.3-rc1 and classified as very critical. This vulnerability affects the function bpf_get_stack/bpf_get_task_stack of the component BPF. Performing a manipulation results in race condition. This vulnerability is cataloged as CVE-2026-98045. The attack must be initiated from a local position. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as very critical, was found in Linux Kernel up to 6.12.110/6.18.52/7.2.6/7.3-rc1. This affects the function bpf_get_stack/bpf_get_task_stack of the component BPF. 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: bpf: Mark faultable stack helpers as sleepable The faultable variants of bpf_get_stack() and bpf_get_task_stack() pass may_fault=true into the common stack collection code. Resolving user-space build IDs may then call build_id_parse_file() and block on filesystem reads. Neither helper prototype sets might_sleep. Since prototype selection uses the sleepability of the whole program, the verifier can still allow these helpers from a non-sleepable region within that program, such as an explicit RCU or preemption-disabled region. The task-stack helper can also be called from a non-sleepable timer callback of a sleepable program. Mark both faultable prototypes as sleepable. The existing helper context check then rejects these calls while continuing to allow them in genuinely sleepable contexts.

It is possible to read the advisory at git.kernel.org. This vulnerability is uniquely identified as CVE-2026-98045 since 09/25/2026. The exploitability is told to be easy. Attacking locally is a requirement. Additional levels of successful authentication are 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 $0-$5k at the moment (estimation calculated on 09/25/2026).

Upgrading to version 6.12.111, 6.18.53, 7.2.7 or 7.3-rc2 eliminates this vulnerability. Applying the patch 44b8d370f2725bad215da3e67668e98ba96671bd/3014e8a8bdad55075d89836ad9c10710a9a69837/19e8d5a98afd071d8c1c5adeccf92b3c42eddc70/9d02927fdf4e930893c92e35fed01a2704496900 is able to eliminate this problem. The best possible mitigation is suggested to be upgrading to the latest version.

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

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.2
VulDB Meta Temp Score: 7.8

VulDB Base Score: 8.2
VulDB Temp Score: 7.8
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: Partially
Local: Yes
Remote: No

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 6.12.111/6.18.53/7.2.7/7.3-rc2
Patch: 44b8d370f2725bad215da3e67668e98ba96671bd/3014e8a8bdad55075d89836ad9c10710a9a69837/19e8d5a98afd071d8c1c5adeccf92b3c42eddc70/9d02927fdf4e930893c92e35fed01a2704496900

Timelineinfo

09/25/2026 Advisory disclosed
09/25/2026 +0 days CVE reserved
09/25/2026 +0 days VulDB entry created
09/25/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-98045 (🔒)
GCVE (CVE): GCVE-0-2026-98045
GCVE (VulDB): GCVE-100-410259

Entryinfo

Created: 09/25/2026 16:11
Changes: 09/25/2026 16:11 (59)
Complete: 🔍
Cache ID: 216::103

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