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CVE-2026-89471: Linux

8.4

CVSS 3.1

Няма данни

Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

Няма потвърждение

Атакува се

Няма данни

Време до експлоатация

Атакува се локално, без особени условия, без вход и без действие от потребителя.

    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: power: supply: cros_usbpd-charger: bound the EC-reported port count cros_usbpd_charger_probe() reads two port counts from the EC and uses one of them, num_charger_ports, as the loop bound when populating a fixed-size array: struct port_data *ports[EC_USB_PD_MAX_PORTS]; /* 8 entries */ ... for (i = 0; i < charger->num_charger_ports; i++) charger->ports[charger->num_registered_psy++] = port; Both num_usbpd_ports (from EC_CMD_USB_PD_PORTS) and num_charger_ports (from EC_CMD_CHARGE_PORT_COUNT) are u8 values reported by the EC. The only validation is a sanity check that compares the two EC-reported values against each other: if (num_charger_ports < num_usbpd_ports || num_charger_ports > num_usbpd_ports + 1) return -EPROTO; It never checks either count against EC_USB_PD_MAX_PORTS, the size of the ports[] array. A malfunctioning, malicious or compromised EC that reports num_usbpd_ports == num_charger_ports == N for any N > 8 (for example both 255) passes this check, and the loop then writes N pointers into the 8-entry ports[] array embedded in the devm_kzalloc()'d charger_data, overflowing it by up to 255 - 8 = 247 entries (~1976 bytes): a slab out-of-bounds write. Reject a port count larger than the ports[] array can hold.

    Засегнати продукти

    • Linux Linux: f68b883e8fad23ed0ac4756d91594809d78678ed преди 0b5096f6804161b61451b1cec0e38678630be849; f68b883e8fad23ed0ac4756d91594809d78678ed преди c46c9f447415ca802afab51dea1eafc08ddff1c6; f68b883e8fad23ed0ac4756d91594809d78678ed преди a1905375dfc0b9612bbee52fc066e3a70c0d671d; f68b883e8fad23ed0ac4756d91594809d78678ed преди 2746d502b12b343384fb747bdef9cbcfbd7444a2; f68b883e8fad23ed0ac4756d91594809d78678ed преди fd29d08ee487f3bf50f2575aaa74f78a74b09b21; f68b883e8fad23ed0ac4756d91594809d78678ed преди 78be8b7403ff7638162438b664a07d19da76059e; f68b883e8fad23ed0ac4756d91594809d78678ed преди 3d1e01443b221081258ff34ea0cdd0431e4ff62e; f68b883e8fad23ed0ac4756d91594809d78678ed преди 48355ce49359740f52e94d3623f6fc557ce341f0
    • Linux Linux: 4.19; преди 4.19; 5.10.270 до 5.10.*; 5.15.221 до 5.15.*; 6.1.188 до 6.1.*; 6.6.157 до 6.6.*; 6.12.109 до 6.12.*; 6.18.50 до 6.18.*; 7.2.4 до 7.2.*; от 7.3 нататък

    История

    • 11 септември 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-89471: Linux | freedomonline.bg