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CVE-2026-74675

vt: stabilize tty reference in kbd_keycode with tty_port_tty_get

HIGH
7.8
CVSS Score
Published: August 22, 2026 at 03:32 PM UTC
Updated: October 16, 2026 at 08:17 PM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
HIGH7.8
Exploit prediction
EPSS 0.1%
SSVC
No known exploit

Description

In the Linux kernel, the following vulnerability has been resolved: vt: stabilize tty reference in kbd_keycode with tty_port_tty_get kbd_keycode() reads vc->port.tty without acquiring a tty reference, racing against con_shutdown() which clears port.tty under a different lock. Use tty_port_tty_get()/tty_kref_put() to hold a proper reference for the duration the tty pointer is needed.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel· Linux
90%
1da177e4c3f41524e886b7f1b8a0c1fc7321cac22.6.12
Vendor states this is fixed in 38400673c9bfb39cfc87539e1a072087e98f4e4f (fixed)
Vendor states this is fixed in 38a0aa593ebc275aea6f79534d07f44e43768ce6 (fixed)
Vendor states this is fixed in 3f6b1d3fcfc26dc3fc85262f753439df93b055b4 (fixed)
Vendor states this is fixed in b664592e9ba8c47c9e23408db7ba52eb9f946c8a (fixed)
Vendor states this is fixed in b84fd400f80adf4d1c88fbce50ae1cf2f8119e65 (fixed)
Vendor states this is fixed in cab5a342f0589334046741006d8a280514f94235 (fixed)
Vendor states this is fixed in cc4a1a2ce0c58eafd477effb055863935260ddc1 (fixed)
Vendor states this is fixed in e25d47a526939ad44b75f778b8a7500562b84fc1 (fixed)
Vendor states this is fixed in 2.6.12 (unaffected)
Vendor states this is fixed in 5.10.265 (unaffected)
Vendor states this is fixed in 5.15.216 (unaffected)
Vendor states this is fixed in 6.1.183 (unaffected)
Vendor states this is fixed in 6.12.104 (unaffected)
Vendor states this is fixed in 6.18.45 (unaffected)
Vendor states this is fixed in 6.6.152 (unaffected)
Vendor states this is fixed in 7.1.9 (unaffected)
Vendor states this is fixed in 7.2 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (8)

Source: cverecord
https://git.kernel.org/stable/c/b84fd400f80adf4d1c88fbce50ae1cf2f8119e65
Source: cverecord
https://git.kernel.org/stable/c/38400673c9bfb39cfc87539e1a072087e98f4e4f
Source: cverecord
https://git.kernel.org/stable/c/cab5a342f0589334046741006d8a280514f94235
Source: cverecord
https://git.kernel.org/stable/c/38a0aa593ebc275aea6f79534d07f44e43768ce6
Source: cverecord
https://git.kernel.org/stable/c/3f6b1d3fcfc26dc3fc85262f753439df93b055b4
Source: cverecord
https://git.kernel.org/stable/c/b664592e9ba8c47c9e23408db7ba52eb9f946c8a
Source: cverecord
https://git.kernel.org/stable/c/cc4a1a2ce0c58eafd477effb055863935260ddc1
Source: cverecord
https://git.kernel.org/stable/c/e25d47a526939ad44b75f778b8a7500562b84fc1

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.8HIGHLinux
Vector?

Quick Info

StatusRECEIVED

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