CVE-2021-22555
A heap out-of-bounds write affecting Linux since v2.6.19-rc1 was discovered in net/netfilter/x_tables.c. This allows an attacker to gain privileges or cause a DoS (via heap memory corruption) through user name space
- CVSS 3.1
- 7.8
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS
- 79% chance of exploitation in the next 30 days; higher than 99% of CVEs (scores of 2026-10-25)
- CISA KEV
- listed 2025-10-06, due 2025-10-27
- CWE
- CWE-787
- Published
- Modified
- Record from
- the NVD, synced
Affected
- broadcom:fabric_operating_system
- linux:linux_kernel
- netapp:aff_500f_firmware
- netapp:aff_a250_firmware
- netapp:aff_a400_firmware
- netapp:c250_firmware
- netapp:c400_firmware
- netapp:cloud_backup
- netapp:fas_8300_firmware
- netapp:fas_8700_firmware
- netapp:h300s_firmware
- netapp:h410c_firmware
- netapp:h410s_firmware
- netapp:h500s_firmware
- netapp:h610c_firmware
- netapp:h610s_firmware
- netapp:h615c_firmware
- netapp:h700s_firmware
- netapp:hci_management_node
- netapp:solidfire
- netapp:solidfire_baseboard_management_controller
References
- http://packetstormsecurity.com/files/163528/Linux-Kernel-Netfilter-Heap-Out-Of-Bounds-Write.html
- http://packetstormsecurity.com/files/163878/Kernel-Live-Patch-Security-Notice-LSN-0080-1.html
- http://packetstormsecurity.com/files/164155/Kernel-Live-Patch-Security-Notice-LSN-0081-1.html
- http://packetstormsecurity.com/files/164437/Netfilter-x_tables-Heap-Out-Of-Bounds-Write-Privilege-Escalation.html
- http://packetstormsecurity.com/files/165477/Kernel-Live-Patch-Security-Notice-LSN-0083-1.html