Samsung Galaxy S23 Ultra S918NKSS5CXLS
SM-S918N 1 country Android 14

Samsung Galaxy S23 Ultra S918NKSS5CXLS Firmware

Samsung Galaxy S23 Ultra S918NKSS5CXLS is an Android 14 firmware for South Korea (KOO, KTC, LUC, SKC). It is the same firmware configured per region and carrier (CSC). Find your country below, verify the file and download for free. Compared with the previous build S918NKSS5CXKA: security patch 2025-01-01 instead of 2024-12-01. A newer build for SM-S918N is available: S918NKSU8GZIF.

OS updates guaranteed until: Android 17Security updates until: Jan 25, 2028
9.3/10 (338)8,784 times
Android 14
OS Version
2025-01-16
Build Date
2025-01-01
Security patch
1
Countries
4
CSC codes
5
Bootloader binary

Bootloader binary 5. Flashing firmware with a lower binary is usually blocked by Samsung anti-rollback.

Newer builds of Samsung Galaxy S23 Ultra use bootloader binary 8 (latest: S918NKSU8GZIF). If your device already runs binary 8, this build cannot be flashed.

All regional downloads

Pick your region (CSC) to download the matching firmware package.

Paste your current build number from Settings > About phone (About tablet) > Software information, or the output of *#1234#.
    MODEM/CP Version: S918NKSS5CXLS
    ModelRegionCSC VersionRelease dateSizeFile nameDownload
    SM-S918N
    KOO, KTC, LUC, SKC South Korea
    		S918NOKR5CXLS 2025-01-16 9.548 GiB
    SM-S918N_2_20250102201040_evpvvesa71_fac.zip

    No matching downloads

    How to flash S918NKSS5CXLS

    • S918NKSS5CXLS has bootloader binary 5. Your device must run binary 5 or lower: it is the 5th character from the end of your current build number.
    • CSC: Use CSC for a clean install, to change the region (CSC code), to downgrade or to repair a device that does not boot.
    • HOME_CSC: Use HOME_CSC to update the same model and region while keeping your data. Back up anyway: a failed update can still require a reset.
    • The Download Mode key combo depends on the model: see all combos.
    Full flashing guide
    Beware: Manually flashing firmwares may brick your device. Use it at your own risk and follow our tutorial steps.

    Security patch: January 2025

    SMR Jan-2025 fixes 40 vulnerabilities, 5 of them critical. Android Security Bulletin: 27, Samsung-specific issues (SVE): 13.

    Most severe Samsung fixes:

    • high Out-of-bounds write in libsthmbc.so (CVE-2025-20881)
    • high Out-of-bounds write in libsthmbc.so (CVE-2025-20882)
    • high Improper access control in SoundPicker (CVE-2025-20883)

    All fixes and Galaxy models with this patch

    Rollout of S918NKSS5CXLS by region

    Samsung released this build in all regions (4) on the same day, January 16, 2025.

    Device specifications

    • Display diagonal17.3 cm (6.8")
    • Display resolution3088 x 1440 pixels
    • RAM8 GB
    • Rear camera resolution200 MP
    • Rear camera typeQuad camera
    • Battery capacity5000 mAh
    • Weight233 g

    Specifications of SM-S918B, a regional variant of the same device. Chipset and SIM lines are left out: they can differ by region.

    Frequently Asked Questions

    S918NKSS5CXLS is Android 14 firmware for Samsung Galaxy S23 Ultra, released for South Korea (KOO, KTC, LUC, SKC). It includes the 2025-01-01 security patch. Samsung built it on 2025-01-16.

    SMR Jan-2025 fixes 40 vulnerabilities, 5 of them critical. Android Security Bulletin: 27, Samsung-specific issues (SVE): 13.

    No. A newer build for SM-S918N is available: S918NKSU8GZIF. Install it instead of S918NKSS5CXLS unless you need this exact version. The previous build was S918NKSS5CXKA.

    Download the package for your region (CSC) and unzip it. In Odin, load each file into the slot with the same name: BL, AP, CP (if the package has one) and CSC, or HOME_CSC to keep your data. Odin checks the built-in checksum of every .tar.md5 file before flashing. The download is 9.548 GiB; keep about twice that free on the computer to unzip it. The Samsung Galaxy S23 Ultra must be on bootloader binary 5 or lower.

    This build uses bootloader binary 5. It can be flashed on a Samsung Galaxy S23 Ultra running binary 5 or lower; if the device already has a higher binary, Odin stops with "SW REV CHECK FAIL". 3 other builds of this model use the same binary, so you can switch between them in both directions.

    Other builds and changelog for Samsung Galaxy S23 Ultra

    No changelog details available.
    Model firmware by region