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NVD / CVE Program· CNA Linux

CVE-2026-74683: Input: evdev - sanitize event type index when fetching event masks

Noroxi assessment

Priority: Monitor (action score 0/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.19% (FIRST EPSS).
  • Fixed version: Linux Linux 3abd29c61d2ef37c4102cf755b18be53bb9dbea6, 4034ef247a9dde3f56660b01f0c3280dac6b1274, 433913b4a92214d76e9f0c03ad9128fec943d5f8; azl3 kernel 6.6.150.1-1 on Azure Linux 3.0 6.6.152.1-1.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 3abd29c61d2ef37c4102cf755b18be53bb9dbea6, 4034ef247a9dde3f56660b01f0c3280dac6b1274, 433913b4a92214d76e9f0c03ad9128fec943d5f8; azl3 kernel 6.6.150.1-1 on Azure Linux 3.0 6.6.152.1-1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

—No exploit Fix available
Published
Aug 22, 2026
Updated
Oct 14, 2026
EPSS
0.1% · 8th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

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Noroxi analysis

What does it mean in your environment?

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 4.4affected
    • 06a16293f71927f756dcf37558a79c0b05a91641 and later · before c79b08d8fa230871a3634e34a66e591ac2d084efaffected · git
    • 06a16293f71927f756dcf37558a79c0b05a91641 and later · before f27fa9b39f925d26e034a1f382cb45523138f4aeaffected · git
    • 06a16293f71927f756dcf37558a79c0b05a91641 and later · before f3fc329acad9a71b3c077237cbac20670d2358c8affected · git
    • 06a16293f71927f756dcf37558a79c0b05a91641 and later · before 5db341189bb7ff041d570dbe36ecca7e32913927affected · git
    • 06a16293f71927f756dcf37558a79c0b05a91641 and later · before 433913b4a92214d76e9f0c03ad9128fec943d5f8affected · git
    • 06a16293f71927f756dcf37558a79c0b05a91641 and later · before 4034ef247a9dde3f56660b01f0c3280dac6b1274affected · git
    • 06a16293f71927f756dcf37558a79c0b05a91641 and later · before 810e1883d4815f29c30d900ad7333d03cc2515d1affected · git
    • 06a16293f71927f756dcf37558a79c0b05a91641 and later · before 3abd29c61d2ef37c4102cf755b18be53bb9dbea6affected · git
    • before 4.4not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.187-16.1.187-1
Debian:12linux-6.12before 6.12.107-1~deb12u16.12.107-1~deb12u1
Debian:13linuxbefore 6.12.105-16.12.105-1
Debian:14linuxbefore 7.1.9-17.1.9-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-74681Aug 22, 2026 · usb: misc: usbio: check ibuf_len against rxbuf_len in bulk msg
    0Monitor
  • ← EarlierCVE-2026-74682Aug 22, 2026 · ALSA: usb-audio: fix OOB write on Type II inbound URBs
    0Monitor
  • Later →CVE-2026-74684Aug 22, 2026 · net: tap: set skb->dev before parsing virtio net header in tap_get_user_xdp()
    28Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux3abd29c61d2ef37c4102cf755b18be53bb9dbea6Vendor (CNA)
Linux Linux4034ef247a9dde3f56660b01f0c3280dac6b1274Vendor (CNA)
Linux Linux433913b4a92214d76e9f0c03ad9128fec943d5f8Vendor (CNA)
Linux Linux5db341189bb7ff041d570dbe36ecca7e32913927Vendor (CNA)
Linux Linux810e1883d4815f29c30d900ad7333d03cc2515d1Vendor (CNA)
Linux Linuxc79b08d8fa230871a3634e34a66e591ac2d084efVendor (CNA)
Linux Linuxf27fa9b39f925d26e034a1f382cb45523138f4aeVendor (CNA)
Linux Linuxf3fc329acad9a71b3c077237cbac20670d2358c8Vendor (CNA)
azl3 kernel 6.6.150.1-1 on Azure Linux 3.06.6.152.1-1 · Release NotesMicrosoft (MSRC)
debian:linux6.1.187-1 · Debian:12Package registry (OSV)
debian:linux-6.126.12.107-1~deb12u1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Technical details

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (7 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records