{"id":"CVE-2026-92518","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nriscv, bpf: Fix kernel stack corruption in tailcall with CFI\n\nWhen CONFIG_CFI_CLANG is enabled, prog->bpf_func already skips the kcfi\ninstruction during setup","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nriscv, bpf: Fix kernel stack corruption in tailcall with CFI\n\nWhen CONFIG_CFI_CLANG is enabled, prog->bpf_func already skips the kcfi\ninstruction during setup. Includin…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","vendor":"Linux","product":"Linux","affected":["Linux >= 30a59cc79754fd9ff3f41b7ee2eb21da85988548 < 34b1bb33a025787e05f966e74de18cd36276f801","Linux >= 30a59cc79754fd9ff3f41b7ee2eb21da85988548 < a6e11a81da3420fd37f1518d4f238c4d5784086e","Linux >= 30a59cc79754fd9ff3f41b7ee2eb21da85988548 < 52fb1756ea1d2759dfef2d86245be00b05dac3a2","Linux fe5b68fdcec0f3d97a32f4c4acfef59cf90718f7","Linux >= 6.11.6 < 6.12","Linux 6.12"],"published":"2026-09-17","updated":"2026-09-18","sourceUpdated":"2026-09-18T18:18:13.997","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-92518","references":[{"url":"https://git.kernel.org/stable/c/34b1bb33a025787e05f966e74de18cd36276f801","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/52fb1756ea1d2759dfef2d86245be00b05dac3a2","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/a6e11a81da3420fd37f1518d4f238c4d5784086e","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"epss":0.00162,"epssPercentile":0.0579,"ingestedAt":"2026-09-17T16:21:47.777Z","slug":"CVE-2026-92518","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nriscv, bpf: Fix kernel stack corruption in tailcall with CFI\n\nWhen CONFIG_CFI_CLANG is enabled, prog->bpf_func already skips the kcfi\ninstruction during setup. Including it again in the tailcall jump offset\ncauses it to jump over an extra 4 bytes, skipping the stack pointer\nadjustment, which will result in kernel stack corruption.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":207343,"id":"CVE-2026-92518","ts":1789757341033,"field":"cvss","old":null,"new":"7.8"},{"seq":207342,"id":"CVE-2026-92518","ts":1789757341033,"field":"severity","old":"none","new":"high"}]}