Linux Kernel up to 7.1.8 bpf adjust_ptr_min_max_vals stack-based overflow

CVSS Meta Temp Score
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CTI Interest Score
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7.8$0-$5k0.43-

Summaryinfo

A vulnerability, which was classified as very critical, was found in Linux Kernel up to 7.1.8. This vulnerability affects the function adjust_ptr_min_max_vals of the component bpf. The manipulation results in stack-based overflow. This vulnerability is reported as CVE-2026-74720. The attack requires a local approach. No exploit exists.

Detailsinfo

A vulnerability classified as very critical has been found in Linux Kernel up to 7.1.8. Affected is the function adjust_ptr_min_max_vals of the component bpf. The manipulation with an unknown input leads to a stack-based overflow vulnerability. CWE is classifying the issue as CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: bpf: Preserve pointer state for commuted arithmetic When scalar += pointer is handled in adjust_ptr_min_max_vals(), the destination register inherits the pointer state from the source pointer. Copying only selected fields is fragile because pointer provenance is tracked by several bpf_reg_state fields. Use the caller's temporary offset register to preserve the scalar operand while replacing the destination with the full pointer state. This preserves the frame number for PTR_TO_STACK registers and keeps parent identity fields consistent.

The advisory is shared for download at git.kernel.org. This vulnerability is traded as CVE-2026-74720 since 08/15/2026. The exploitability is told to be easy. The attack needs to be approached locally. Additional levels of successful authentication are required for exploitation. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 08/22/2026).

Upgrading to version 5.10.265, 5.15.216, 6.1.183, 6.6.152, 6.12.104, 6.18.45 or 7.1.9 eliminates this vulnerability. Applying the patch 86b203aadc2930e0a4f9c6277b5b80ff3664c472/8109c25e0c41f5f19a1c2380bb49c991a877494e/d1959028190a7649b926f5867a58de5fe221b23c/8cb23101a3fcc7432b451ea3d0f14a90711f4acf/29c239f8dbec5ab33a61796724d189bddee6cd4b/db6382ed3361bdd8129572a3423956cba1dae829/eaffa1495e4fe6330aeff9f323ea3d48b01f118a/a4c6f804b44c5c790269b25e0e61cf4e9f117c86 is able to eliminate this problem.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-64407). Once again VulDB remains the best 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: 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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💳💳💳💳💳💳
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Stack-based overflow
CWE: CWE-121 / CWE-119
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 5.10.265/5.15.216/6.1.183/6.6.152/6.12.104/6.18.45/7.1.9
Patch: 86b203aadc2930e0a4f9c6277b5b80ff3664c472/8109c25e0c41f5f19a1c2380bb49c991a877494e/d1959028190a7649b926f5867a58de5fe221b23c/8cb23101a3fcc7432b451ea3d0f14a90711f4acf/29c239f8dbec5ab33a61796724d189bddee6cd4b/db6382ed3361bdd8129572a3423956cba1dae829/eaffa1495e4fe6330aeff9f323ea3d48b01f118a/a4c6f804b44c5c790269b25e0e61cf4e9f117c86

Timelineinfo

08/15/2026 CVE reserved
08/22/2026 +7 days Advisory disclosed
08/22/2026 +0 days VulDB entry created
08/22/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-74720 (🔒)
GCVE (CVE): GCVE-0-2026-74720
GCVE (VulDB): GCVE-100-394452
EUVD: 🔒

Entryinfo

Created: 08/22/2026 18:48
Updated: 08/22/2026 22:07
Changes: 08/22/2026 18:48 (59), 08/22/2026 22:07 (1)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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