CVE-2026-92518 PUBLISHED

riscv, bpf: Fix kernel stack corruption in tailcall with CFI

Assigner: Linux
Reserved: 16.09.2026 Published: 17.09.2026 Updated: 17.09.2026

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

riscv, bpf: Fix kernel stack corruption in tailcall with CFI

When CONFIG_CFI_CLANG is enabled, prog->bpf_func already skips the kcfi instruction during setup. Including it again in the tailcall jump offset causes it to jump over an extra 4 bytes, skipping the stack pointer adjustment, which will result in kernel stack corruption.

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from 30a59cc79754fd9ff3f41b7ee2eb21da85988548 to 34b1bb33a025787e05f966e74de18cd36276f801 (excl.)
  • affected from 30a59cc79754fd9ff3f41b7ee2eb21da85988548 to a6e11a81da3420fd37f1518d4f238c4d5784086e (excl.)
  • affected from 30a59cc79754fd9ff3f41b7ee2eb21da85988548 to 52fb1756ea1d2759dfef2d86245be00b05dac3a2 (excl.)
  • Version fe5b68fdcec0f3d97a32f4c4acfef59cf90718f7 is affected
  • affected from 6.11.6 to 6.12 (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • Version 6.12 is affected
  • unaffected from 0 to 6.12 (excl.)
  • unaffected from 6.18.52 to 6.18.* (incl.)
  • unaffected from 7.2.6 to 7.2.* (incl.)
  • unaffected from 7.3-rc1 to * (incl.)

References