CVE-2021-47486
In the Linux kernel, the following vulnerability has been resolved: riscv, bpf: Fix potential NULL dereference The bpf_jit_binary_free() function requires a non-NULL argument.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.68%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
In the Linux kernel, the following vulnerability has been resolved: riscv, bpf: Fix potential NULL dereference The bpf_jit_binary_free() function requires a non-NULL argument. When the RISC-V BPF JIT fails to converge in NR_JIT_ITERATIONS steps, jit_data->header will be NULL, which triggers a NULL dereference. Avoid this by checking the argument, prior calling the function.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.68% probability · 50th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-476
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/27de809a3d83a6199664479ebb19712533d6fd9bPatch
- https://git.kernel.org/stable/c/cac6b043cea3e120f4fccec16f7381747cbfdc0dPatch
- https://git.kernel.org/stable/c/e1b80a5ebe5431caeb20f88c32d4a024777a2d41Patch
- https://git.kernel.org/stable/c/27de809a3d83a6199664479ebb19712533d6fd9bPatch
- https://git.kernel.org/stable/c/cac6b043cea3e120f4fccec16f7381747cbfdc0dPatch
- https://git.kernel.org/stable/c/e1b80a5ebe5431caeb20f88c32d4a024777a2d41Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.