Riskcovery

CVE-2026-92518

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

State
Published
Severity
7.8 High
Published
Sep 17, 2026
Updated
Oct 19, 2026
Reserved
Sep 16, 2026

Read the record on cve.org

Description

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.

Scores

CVSSScoreVectorSource
3.17.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HLinux

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 30a59cc79754fd9ff3f41b7ee2eb21da85988548 to before 34b1bb33a025787e05f966e74de18cd36276f801Affected
  • 30a59cc79754fd9ff3f41b7ee2eb21da85988548 to before a6e11a81da3420fd37f1518d4f238c4d5784086eAffected
  • 30a59cc79754fd9ff3f41b7ee2eb21da85988548 to before 52fb1756ea1d2759dfef2d86245be00b05dac3a2Affected
  • fe5b68fdcec0f3d97a32f4c4acfef59cf90718f7Affected
  • 6.11.6 to before 6.12Affected
LinuxLinux
  • 6.12Affected
  • before 6.12Not affected
  • 6.18.52 through 6.18.*Not affected
  • 7.2.6 through 7.2.*Not affected
  • 7.3 and laterNot affected

References

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