Linux Kernel up to 7.3-rc1 ima validate_hash_algo memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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6.2$0-$5k0.44

Summaryinfo

A vulnerability was found in Linux Kernel up to 7.3-rc1 and classified as critical. Affected is the function validate_hash_algo of the component ima. The manipulation results in memory corruption. This vulnerability is reported as CVE-2026-89989. The attack can be launched remotely. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in Linux Kernel up to 7.3-rc1. Affected is the function validate_hash_algo of the component ima. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. This is going to have an impact on availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: ima: Check for ERR_PTR from dentry_path() in validate_hash_algo() dentry_path() returns ERR_PTR(-ENAMETOOLONG) when the path exceeds the buffer. validate_hash_algo() passes the result straight to integrity_audit_msg() without checking. ERR_PTR is not NULL, so integrity_audit_message() sees a valid pointer and calls strlen() on it, which faults: BUG: unable to handle page fault for address: ffffffffffffffdc RIP: 0010:strlen+0x30/0xa0 Call Trace: audit_log_untrustedstring+0x19/0x30 integrity_audit_message+0x366/0x4f0 ima_inode_setxattr+0x512/0x5f0 Check for IS_ERR() and use NULL instead, which makes the audit message skip the name= field instead of crashing.

The advisory is available at git.kernel.org. This vulnerability is traded as CVE-2026-89989 since 09/11/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 09/16/2026).

Upgrading to version 5.15.221, 6.1.188, 6.6.157, 6.12.110, 6.18.51, 7.2.5 or 7.3-rc2 eliminates this vulnerability. Applying the patch d6fade89903c8fd0af6c956242aec8b927040e02/0de5b525c0cd7d202848b8adfde3c01c287fb1a6/30b5c0e17dcad72b6b2f987319aa645570e6376d/9e69d683ebd7def04557fe758ff123105d7d9840/f8a2f2a4602318eb93d49d27fd0d0fdaab17edde/d62a84a78de5f29c642fa3bd4eee072ba7289cb4/8861f6d5c0678a7c5089c7b272509fc5931b8437 is able to eliminate this problem. The best possible mitigation is suggested to be upgrading to the latest version.

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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: 6.5
VulDB Meta Temp Score: 6.2

VulDB Base Score: 6.5
VulDB Temp Score: 6.2
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: Memory corruption
CWE: 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 5.15.221/6.1.188/6.6.157/6.12.110/6.18.51/7.2.5/7.3-rc2
Patch: d6fade89903c8fd0af6c956242aec8b927040e02/0de5b525c0cd7d202848b8adfde3c01c287fb1a6/30b5c0e17dcad72b6b2f987319aa645570e6376d/9e69d683ebd7def04557fe758ff123105d7d9840/f8a2f2a4602318eb93d49d27fd0d0fdaab17edde/d62a84a78de5f29c642fa3bd4eee072ba7289cb4/8861f6d5c0678a7c5089c7b272509fc5931b8437

Timelineinfo

09/11/2026 CVE reserved
09/16/2026 +5 days Advisory disclosed
09/16/2026 +0 days VulDB entry created
09/16/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-89989 (🔒)
GCVE (CVE): GCVE-0-2026-89989
GCVE (VulDB): GCVE-100-405822

Entryinfo

Created: 09/16/2026 15:11
Changes: 09/16/2026 15:11 (59)
Complete: 🔍
Cache ID: 216::103

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