What’s Vulnerable › Vulnerabilities

CVE-2026-92518: riscv, bpf: Fix kernel stack corruption in tailcall with CFI

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-17 · updated 2026-10-19

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.

Affected products

• Linux kernel: from 6.11.6 before 6.12; 6.12 — fixed in 6.12, 7.3

How to fix

Upgrade to a fixed version: Linux kernel 6.12, 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/34b1bb33a025787e05f966e74de18cd36276f801
• https://git.kernel.org/stable/c/52fb1756ea1d2759dfef2d86245be00b05dac3a2
• https://git.kernel.org/stable/c/a6e11a81da3420fd37f1518d4f238c4d5784086e

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