Linux Kernel up to 6.6.156/6.12.109/6.18.51/7.2.5 Keembay register_aes_algs off-by-one

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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9.5$5k-$25k0.78-

Summaryinfo

A vulnerability classified as very critical was found in Linux Kernel up to 6.6.156/6.12.109/6.18.51/7.2.5. Affected by this issue is the function register_aes_algs of the component Keembay. The manipulation results in off-by-one. This vulnerability is reported as CVE-2026-93155. The attack can be launched remotely. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as very critical has been found in Linux Kernel up to 6.6.156/6.12.109/6.18.51/7.2.5. Affected is the function register_aes_algs of the component Keembay. The manipulation with an unknown input leads to a off-by-one vulnerability. CWE is classifying the issue as CWE-193. A product calculates or uses an incorrect maximum or minimum value that is 1 more, or 1 less, than the correct value. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: crypto: keembay - Fix AEAD unregister count in error path register_aes_algs() registers the AEAD algorithms before registering the skcipher algorithms. If skcipher registration fails, the function unwinds the earlier AEAD registration with crypto_engine_unregister_aeads(), but it passes ARRAY_SIZE(algs), which is the skcipher table size. Use ARRAY_SIZE(algs_aead) for the AEAD unwind path so the unregister helper iterates over the same table that was registered. Also clarify the nearby comment: the crypto registration helpers clean up algorithms registered within the same call, while this function must still unwind earlier successful registration steps.

The advisory is shared for download at git.kernel.org. This vulnerability is traded as CVE-2026-93155 since 09/17/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 09/17/2026).

Upgrading to version 6.6.157, 6.12.110, 6.18.52, 7.2.6 or 7.3-rc1 eliminates this vulnerability. Applying the patch 27ec91c29ee155cc507b2f56221fc6fab65dbb51/5607b101d86cbee8dd1ffab784495c880ca73383/5bbb726d27ff6dff750264e51aa665538394d0f8/a3217fe7998622728a53dff405615e0971949eaf/e264401ce4776a288524e5b87593d4d864147115 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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Version

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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: Off-by-one
CWE: CWE-193 / CWE-189
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 6.6.157/6.12.110/6.18.52/7.2.6/7.3-rc1
Patch: 27ec91c29ee155cc507b2f56221fc6fab65dbb51/5607b101d86cbee8dd1ffab784495c880ca73383/5bbb726d27ff6dff750264e51aa665538394d0f8/a3217fe7998622728a53dff405615e0971949eaf/e264401ce4776a288524e5b87593d4d864147115

Timelineinfo

09/17/2026 Advisory disclosed
09/17/2026 +0 days CVE reserved
09/17/2026 +0 days VulDB entry created
09/17/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-93155 (🔒)
GCVE (CVE): GCVE-0-2026-93155
GCVE (VulDB): GCVE-100-407232

Entryinfo

Created: 09/17/2026 23:57
Changes: 09/17/2026 23:57 (59)
Complete: 🔍
Cache ID: 216::103

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