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 | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Ubuntu | — | Upgrade linux-awsUpgrade linuxUpgrade linux-riscv-7.0Upgrade linux-riscvUpgrade linux-hwe-7.0Upgrade linux-ibmUpgrade linux-oracleUpgrade linux-gcpUpgrade linux-oem-7.0 | Nov 3, 2026 | Sep 17, 2026 |
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