CVE-2022-50226
crypto: ccp - Use kzalloc for sev ioctl interfaces to prevent kernel memory leak
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crypto: ccp - Use kzalloc for sev ioctl interfaces to prevent kernel memory leak
In the Linux kernel, the following vulnerability has been resolved: crypto: ccp - Use kzalloc for sev ioctl interfaces to prevent kernel memory leak For some sev ioctl interfaces, input may be passed that is less than or equal to SEV_FW_BLOB_MAX_SIZE, but larger than the data that PSP firmware returns. In this case, kmalloc will allocate memory that is the size of the input rather than the size of the data. Since PSP firmware doesn't fully overwrite the buffer, the sev ioctl interfaces with the issue may return uninitialized slab memory. Currently, all of the ioctl interfaces in the ccp driver are safe, but to prevent future problems, change all ioctl interfaces that allocate memory with kmalloc to use kzalloc and memset the data buffer to zero in sev_ioctl_do_platform_status.
Reserved 2025-06-18 | Published 2025-06-18 | Updated 2025-06-18 | Assigner Linuxgit.kernel.org/...c/4c5300f6f5e18b11c02a92f136e69b98fddba15e
git.kernel.org/...c/f2a920daa780956b987c14b9f23de7c3c8915bf2
git.kernel.org/...c/caa395aa16e7c9193fd7fa6cde462dd8229d4953
git.kernel.org/...c/e11fb0a3a39bb42da35fa662c46ce7391f277436
git.kernel.org/...c/13dc15a3f5fd7f884e4bfa8c011a0ae868df12ae
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