CVE-2026-92518
7.8
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
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 Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 30a59cc79754fd9ff3f41b7ee2eb21da85988548 < 34b1bb33a025787e05f966e74de18cd36276f801 | affected |
| Linux | Linux | 30a59cc79754fd9ff3f41b7ee2eb21da85988548 < a6e11a81da3420fd37f1518d4f238c4d5784086e | affected |
| Linux | Linux | 30a59cc79754fd9ff3f41b7ee2eb21da85988548 < 52fb1756ea1d2759dfef2d86245be00b05dac3a2 | affected |
| Linux | Linux | fe5b68fdcec0f3d97a32f4c4acfef59cf90718f7 | affected |
| Linux | Linux | 6.11.6 < 6.12 | affected |
| Linux | Linux | 6.12 | affected |
| Linux | Linux | 0 < 6.12 | unaffected |
| Linux | Linux | 6.18.52 <= 6.18.* | unaffected |
| Linux | Linux | 7.2.6 <= 7.2.* | unaffected |
| Linux | Linux | 7.3-rc1 <= * | unaffected |
Weaknesses
References
- https://git.kernel.org/stable/c/34b1bb33a025787e05f966e74de18cd36276f801
- https://git.kernel.org/stable/c/a6e11a81da3420fd37f1518d4f238c4d5784086e
- https://git.kernel.org/stable/c/52fb1756ea1d2759dfef2d86245be00b05dac3a2
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