Linux Kernel up to 7.1.8 evdev evdev_get_mask_cnt out-of-bounds

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.0$0-$5k0.87

Summaryinfo

A vulnerability described as critical has been identified in Linux Kernel up to 7.1.8. This affects the function evdev_get_mask_cnt of the component evdev. Executing a manipulation can lead to out-of-bounds. This vulnerability is tracked as CVE-2026-74683. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability classified as critical was found in Linux Kernel up to 7.1.8. This vulnerability affects the function evdev_get_mask_cnt of the component evdev. The manipulation with an unknown input leads to a out-of-bounds vulnerability. The CWE definition for the vulnerability is CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: Input: evdev - sanitize event type index when fetching event masks The user-supplied event type index passed to EVIOCGMASK / EVIOCSMASK ioctls is used to index the static counts array in evdev_get_mask_cnt() and client evmasks array in evdev_get_mask(). While the event type is architecturally bounded by EV_CNT, speculative execution may mispredict bounds checks and perform out-of-bounds loads. Sanitize the event type index in evdev_get_mask_cnt() branchlessly using array_index_mask_nospec(). This clamps the index to 0 for safe array access and forces the returned count to 0 speculatively when the index is out of bounds. We do not need additional array_index_nospec() calls in evdev_get_mask() because evdev_get_mask_cnt() speculatively forces the count (and resulting xfer_size) to 0 for out-of-bounds types, preventing any speculative memory access to client evmasks array.

The advisory is available at git.kernel.org. This vulnerability was named CVE-2026-74683 since 08/15/2026. The exploitation appears to be easy. The attack can be initiated 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 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 c79b08d8fa230871a3634e34a66e591ac2d084ef/f27fa9b39f925d26e034a1f382cb45523138f4ae/f3fc329acad9a71b3c077237cbac20670d2358c8/5db341189bb7ff041d570dbe36ecca7e32913927/433913b4a92214d76e9f0c03ad9128fec943d5f8/4034ef247a9dde3f56660b01f0c3280dac6b1274/810e1883d4815f29c30d900ad7333d03cc2515d1/3abd29c61d2ef37c4102cf755b18be53bb9dbea6 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: 6.3
VulDB Meta Temp Score: 6.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
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: Out-of-bounds
CWE: CWE-125 / 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 5.10.265/5.15.216/6.1.183/6.6.152/6.12.104/6.18.45/7.1.9
Patch: c79b08d8fa230871a3634e34a66e591ac2d084ef/f27fa9b39f925d26e034a1f382cb45523138f4ae/f3fc329acad9a71b3c077237cbac20670d2358c8/5db341189bb7ff041d570dbe36ecca7e32913927/433913b4a92214d76e9f0c03ad9128fec943d5f8/4034ef247a9dde3f56660b01f0c3280dac6b1274/810e1883d4815f29c30d900ad7333d03cc2515d1/3abd29c61d2ef37c4102cf755b18be53bb9dbea6

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-2026-74683 (🔒)
GCVE (CVE): GCVE-0-2026-74683
GCVE (VulDB): GCVE-100-394462

Entryinfo

Created: 08/22/2026 18:52
Changes: 08/22/2026 18:52 (59)
Complete: 🔍
Cache ID: 216::103

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