CVE-2022-50185

drm/radeon: fix potential buffer overflow in ni_set_mc_special_registers()

State: Published
Severity: Not scored
Published: Jun 18, 2025
Updated: May 11, 2026
Reserved: Jun 18, 2025

Description

In the Linux kernel, the following vulnerability has been resolved:

drm/radeon: fix potential buffer overflow in ni_set_mc_special_registers()

The last case label can write two buffers 'mc_reg_address[j]' and 'mc_data[j]' with 'j' offset equal to SMC_NISLANDS_MC_REGISTER_ARRAY_SIZE since there are no checks for this value in both case labels after the last 'j++'.

Instead of changing '>' to '>=' there, add the bounds check at the start of the second 'case' (the first one already has it).

Also, remove redundant last checks for 'j' index bigger than array size. The expression is always false. Moreover, before or after the patch 'table->last' can be equal to SMC_NISLANDS_MC_REGISTER_ARRAY_SIZE and it seems it can be a valid value.

Detected using the static analysis tool - Svace.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	69e0b57a91adca2e3eb56ed4db39ab90f3ae1043 to before ea73869df6ef386fc0feeb28ff66742ca835b18fAffected 69e0b57a91adca2e3eb56ed4db39ab90f3ae1043 to before 1f341053852be76f82610ce47a505d930512f05cAffected 69e0b57a91adca2e3eb56ed4db39ab90f3ae1043 to before db1a9add3f90ff1c641974d5bb910c16b87af4efAffected 69e0b57a91adca2e3eb56ed4db39ab90f3ae1043 to before 8508d6d23a247c29792ce2fc0df3f3404d6a6a80Affected 69e0b57a91adca2e3eb56ed4db39ab90f3ae1043 to before deb603c5928e546609c0d5798e231d0205748943Affected 69e0b57a91adca2e3eb56ed4db39ab90f3ae1043 to before 782e413e38dffd37cc85b08b1ccb982adb4a93ceAffected 69e0b57a91adca2e3eb56ed4db39ab90f3ae1043 to before 9faff03617afeced1c4e5daa89e79b3906374342Affected 69e0b57a91adca2e3eb56ed4db39ab90f3ae1043 to before 136f614931a2bb73616b292cf542da3a18daefd5Affected
LinuxLinux	3.11Affected before 3.11Not affected 4.14.291 through 4.14.Not affected 4.19.256 through 4.19.Not affected 5.4.211 through 5.4.Not affected 5.10.137 through 5.10.Not affected 5.15.61 through 5.15.Not affected 5.18.18 through 5.18.Not affected 5.19.2 through 5.19.*Not affected 6.0 and laterNot affected

Product

Versions

LinuxLinux

69e0b57a91adca2e3eb56ed4db39ab90f3ae1043 to before ea73869df6ef386fc0feeb28ff66742ca835b18fAffected
69e0b57a91adca2e3eb56ed4db39ab90f3ae1043 to before 1f341053852be76f82610ce47a505d930512f05cAffected
69e0b57a91adca2e3eb56ed4db39ab90f3ae1043 to before db1a9add3f90ff1c641974d5bb910c16b87af4efAffected
69e0b57a91adca2e3eb56ed4db39ab90f3ae1043 to before 8508d6d23a247c29792ce2fc0df3f3404d6a6a80Affected
69e0b57a91adca2e3eb56ed4db39ab90f3ae1043 to before deb603c5928e546609c0d5798e231d0205748943Affected
69e0b57a91adca2e3eb56ed4db39ab90f3ae1043 to before 782e413e38dffd37cc85b08b1ccb982adb4a93ceAffected
69e0b57a91adca2e3eb56ed4db39ab90f3ae1043 to before 9faff03617afeced1c4e5daa89e79b3906374342Affected
69e0b57a91adca2e3eb56ed4db39ab90f3ae1043 to before 136f614931a2bb73616b292cf542da3a18daefd5Affected

LinuxLinux

3.11Affected
before 3.11Not affected
4.14.291 through 4.14.*Not affected
4.19.256 through 4.19.*Not affected
5.4.211 through 5.4.*Not affected
5.10.137 through 5.10.*Not affected
5.15.61 through 5.15.*Not affected
5.18.18 through 5.18.*Not affected
5.19.2 through 5.19.*Not affected
6.0 and laterNot affected

References

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