What’s Vulnerable › Vulnerabilities

CVE-2024-46741: misc: fastrpc: Fix double free of 'buf' in error path

• 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: 2024-09-18 · updated 2026-08-27
• Weakness: CWE-415

Description

In the Linux kernel, the following vulnerability has been resolved: misc: fastrpc: Fix double free of 'buf' in error path smatch warning: drivers/misc/fastrpc.c:1926 fastrpc_req_mmap() error: double free of 'buf' In fastrpc_req_mmap() error path, the fastrpc buffer is freed in fastrpc_req_munmap_impl() if unmap is successful. But in the end, there is an unconditional call to fastrpc_buf_free(). So the above case triggers the double free of fastrpc buf.

Affected products

• Linux kernel: from 6.2 before 6.6.51; from 6.7 before 6.10.10; 6.11-rc1, 6.11-rc2, 6.11-rc3, 6.11-rc4, 6.11-rc5, 6.11-rc6 — fixed in 6.10.10, 6.6.51

How to fix

Upgrade to a fixed version: Linux kernel 6.10.10, 6.6.51. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/4753cc37b6606ef9a7ec22861d380d45e2707f9a
• https://git.kernel.org/stable/c/bfc1704d909dc9911a558b1a5833d3d61a43a1f2
• https://git.kernel.org/stable/c/e8c276d4dc0e19ee48385f74426aebc855b49aaf
• https://git.kernel.org/stable/c/f77dc8a75859e559f3238a6d906206259227985e

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