{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-74675", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-15T05:44:03.925Z", "datePublished": "2026-08-22T15:32:44.493Z", "dateUpdated": "2026-08-25T05:41:27.811Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-25T05:41:27.811Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvt: stabilize tty reference in kbd_keycode with tty_port_tty_get\n\nkbd_keycode() reads vc->port.tty without acquiring a tty reference,\nracing against con_shutdown() which clears port.tty under a different\nlock. Use tty_port_tty_get()/tty_kref_put() to hold a proper reference\nfor the duration the tty pointer is needed."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The vulnerable code is reached only through local virtual-console and input paths: kbd_keycode runs from the VT keyboard input handler on key/key-repeat events while con_shutdown runs during final close(2) on /dev/ttyN; there is no network, Bluetooth-only, or remote-protocol reachability to both sides of the race.\nAC:L - The attacker controls both race participants: one thread can loop open/close a console tty to drive release_tty/con_shutdown while another holds a key for repeat events (down==2) or injects EV_KEY via uinput, retrying until kbd_keycode uses a freed tty_struct.\nPR:L - No real-root capability is required; a console-logged-in user with normal DAC access to /dev/ttyN (typical tty-group membership) can close their VT tty and generate foreground key events, and vt_ioctl grants perm to the controlling-tty owner without CAP_SYS_TTY_CONFIG.\nUI:N - The attacker performs every step from its own console session\u2014opening/closing the VT tty and generating key or key-repeat input\u2014so no separate victim or administrator action is required.\nS:U - The slab use-after-free corrupts kernel heap memory within the same kernel security authority; it does not cross a VM, IOMMU, or sandbox boundary.\nC:H - After the tty is freed, kbd_keycode reads freed tty_struct fields (termios for L_ECHO and optionally tty->ops via tty_chars_in_buffer), giving a use-after-free read primitive and enabling disclosure of kernel memory once the slab object is reclaimed.\nI:H - The path writes tty->driver_data on a freed tty_struct and may indirect-call through tty->ops in tty_chars_in_buffer, enabling heap spray and control-flow hijack for arbitrary kernel modification or privilege escalation.\nA:H - Use-after-free on tty_struct reliably produces kernel oops or panic on illegal dereference through freed memory, and the open/close versus key-repeat race can be retriggered at will for repeatable denial of service."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/tty/vt/keyboard.c"], "versions": [{"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "b84fd400f80adf4d1c88fbce50ae1cf2f8119e65", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "38400673c9bfb39cfc87539e1a072087e98f4e4f", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "cab5a342f0589334046741006d8a280514f94235", "status": "affected", "versionType": "git"}, {"version": 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reference in kbd_keycode with tty_port_tty_get", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/tty/vt/keyboard.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "b84fd400f80adf4d1c88fbce50ae1cf2f8119e65", "status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "versionType": "git"}, {"lessThan": "38400673c9bfb39cfc87539e1a072087e98f4e4f", "status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "versionType": "git"}, {"lessThan": "cab5a342f0589334046741006d8a280514f94235", "status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "versionType": "git"}, {"lessThan": "38a0aa593ebc275aea6f79534d07f44e43768ce6", "status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "versionType": "git"}, {"lessThan": "3f6b1d3fcfc26dc3fc85262f753439df93b055b4", "status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "versionType": "git"}, {"lessThan": "b664592e9ba8c47c9e23408db7ba52eb9f946c8a", "status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "versionType": "git"}, {"lessThan": "cc4a1a2ce0c58eafd477effb055863935260ddc1", "status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "versionType": "git"}, {"lessThan": "e25d47a526939ad44b75f778b8a7500562b84fc1", "status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/tty/vt/keyboard.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "2.6.12"}, {"lessThan": "2.6.12", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.265", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.216", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.183", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.152", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.104", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.45", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.9", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvt: stabilize tty reference in kbd_keycode with tty_port_tty_get\n\nkbd_keycode() reads vc->port.tty without acquiring a tty reference,\nracing against con_shutdown() which clears port.tty under a different\nlock. Use tty_port_tty_get()/tty_kref_put() to hold a proper reference\nfor the duration the tty pointer is needed."}], "id": "CVE-2026-74675", "lastModified": "2026-08-25T06:18:50.237", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-08-22T16:16:41.590", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/38400673c9bfb39cfc87539e1a072087e98f4e4f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/38a0aa593ebc275aea6f79534d07f44e43768ce6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3f6b1d3fcfc26dc3fc85262f753439df93b055b4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b664592e9ba8c47c9e23408db7ba52eb9f946c8a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b84fd400f80adf4d1c88fbce50ae1cf2f8119e65"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/cab5a342f0589334046741006d8a280514f94235"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/cc4a1a2ce0c58eafd477effb055863935260ddc1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e25d47a526939ad44b75f778b8a7500562b84fc1"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: vt: stabilize tty reference in kbd_keycode with tty_port_tty_get", "id": "2521376", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2521376"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-367", "details": ["A flaw was found in the Linux kernel. A race condition exists in the `kbd_keycode()` function within the virtual terminal (vt) subsystem. This occurs when `kbd_keycode()` attempts to read a terminal (tty) reference without properly acquiring and holding it, while the `con_shutdown()` function can concurrently clear the same reference. This timing vulnerability can lead to a use-after-free condition, potentially causing system instability or a denial of service (DoS) for a local attacker."], "name": "CVE-2026-74675", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-22T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-74675\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-74675\nhttps://lore.kernel.org/linux-cve-announce/2026082230-CVE-2026-74675-fffa@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,b84fd400f80adf4d1c88fbce50ae1cf2f8119e65)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,38400673c9bfb39cfc87539e1a072087e98f4e4f)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,cab5a342f0589334046741006d8a280514f94235)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,38a0aa593ebc275aea6f79534d07f44e43768ce6)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,3f6b1d3fcfc26dc3fc85262f753439df93b055b4)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,b664592e9ba8c47c9e23408db7ba52eb9f946c8a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,cc4a1a2ce0c58eafd477effb055863935260ddc1)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,e25d47a526939ad44b75f778b8a7500562b84fc1)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,5.10.265)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,5.15.216)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,6.1.183)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,6.6.152)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,6.12.104)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,6.18.45)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,7.1.9)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.10.265,5.11.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.216,5.16.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.183,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.152,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.104,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.45,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.9,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-08-22T17:45:02.902469+00:00", "updated": "2026-08-25T09:45:03.528800+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}