CVE-2021-33656 PUBLISHED

When setting font with malicous data by ioctl cmd PIO_FONT,kernel will write memory out of bounds.

EPSS 0.03% · 8.6th percentile

Risk Scores

EPSS Score
0.03%
8.6th percentile

Affected Products

VendorProductVersions
Ubuntu:Pro:FIPS:20.04:LTSlinux-gcp-fips5.4.0-1021.21+fips1, 0
Ubuntu:Pro:16.04:LTSlinux-aws4.4.0-1001.10, 4.4.0-1003.12, 4.4.0-1004.13
Ubuntu:Pro:FIPS-updates:18.04:LTSlinux-fips4.15.0-1069.78, 4.15.0-1067.76, 4.15.0-1066.75
Ubuntu:22.04:LTSlinux-realtime5.15.0-1032.35, 0
Ubuntu:Pro:16.04:LTSlinux-kvm4.4.0-1105.114, 4.4.0-1108.118, 4.4.0-1110.120
Ubuntu:16.04:LTSlinux-hwe-edge0, 4.8.0-28.30~16.04.1, 4.8.0-30.32~16.04.1
Ubuntu:18.04:LTSlinux4.13.0-25.29, 4.15.0-143.147, 4.15.0-142.146
Ubuntu:22.04:LTSlinux-intel-iot-realtime5.15.0-1073.75, 0
Ubuntu:20.04:LTSlinux-oem-5.135.13.0-1029.36, 5.13.0-1026.32, 5.13.0-1028.35
Ubuntu:Pro:FIPS:20.04:LTSlinux-fips0, 5.4.0-1007.8
Ubuntu:18.04:LTSlinux-dell300x4.15.0-1005.8, 0, 4.15.0-1031.36
Ubuntu:Pro:FIPS-updates:20.04:LTSlinux-azure-fips5.4.0-1089.94+fips1, 0, 5.4.0-1022.22+fips1
Ubuntu:Pro:FIPS:18.04:LTSlinux-gcp-fips4.15.0-1001.1, 0
Ubuntu:20.04:LTSlinux-riscv5.4.0-39.44, 0, 5.4.0-24.28
Ubuntu:18.04:LTSlinux-ibm-5.45.4.0-1012.13~18.04.1, 5.4.0-1010.11~18.04.2, 0
Ubuntu:20.04:LTSlinux-gkeop5.4.0-1026.27, 5.4.0-1051.54, 5.4.0-1049.52
Ubuntu:18.04:LTSlinux-aws-5.00, 5.0.0-1021.24~18.04.1, 5.0.0-1022.25~18.04.1
Ubuntu:20.04:LTSlinux-hwe-5.115.11.0-38.42~20.04.1, 5.11.0-40.44~20.04.2, 5.11.0-41.45~20.04.1
Ubuntu:20.04:LTSlinux-oracle-5.135.13.0-1027.32~20.04.1, 5.13.0-1028.33~20.04.1, 5.13.0-1030.35~20.04.1
Ubuntu:Pro:16.04:LTSlinux-gcp4.15.0-1014.14~16.04.1, 4.15.0-1015.15~16.04.1, 4.15.0-1017.18~16.04.1

…and 80 more

Timeline

References

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