Some vulnerabilities have been discovered in some newer Android devices which could allow internet-to-baseband remote code execution. (Someone can hack your phone if they know your phone number.)

What to Do

If you have a newer Google Pixel phone, you should update it.

If there's not a security update for your Pixel yet (6, 6 Pro, 6a) or you have a newer Samsung phone, you should disable Wi-Fi calling and VoLTE.

Which Devices?

Google compiled a list of likely affected products:

• Samsung Galaxy phones including those in the S22, M33, M13, M12, A71, A53, A33, A21, A13, A12, and A04 series
• Vivo phones including those in the S16, S15, S6, X70, X60, and X30 series
• Google Pixel 6 and 6 Pro, Pixel 6a, Pixel 7 and 7 Pro
• Any wearables that use the Exynos W920 chipset
• Any vehicles that use the Exynos Auto T5123 chipset

These are the affected chips:

• Exynos Modem 5123
• Exynos Modem 5300
• Exynos 980
• Exynos 1080
• Exynos Auto T5123

https://9to5google.com/2023/03/16/google-exynos-modem-vulnerabilities/