CVE-2021-4441

In the Linux kernel, the following vulnerability has been resolved: spi: spi-zynq-qspi: Fix a NULL pointer dereference in zynq_qspi_exec_mem_op() In zynq_qspi_exec_mem_op(), kzalloc() is directly used in memset(), which could lead to a NULL pointer dereference on failure of kzalloc(). Fix this bug by adding a check of tmpbuf. This bug was found by a static analyzer. The analysis employs differential checking to identify inconsistent security operations (e.g., checks or kfrees) between two code paths and confirms that the inconsistent operations are not recovered in the current function or the callers, so they constitute bugs. Note that, as a bug found by static analysis, it can be a false positive or hard to trigger. Multiple researchers have cross-reviewed the bug. Builds with CONFIG_SPI_ZYNQ_QSPI=m show no new warnings, and our static analyzer no longer warns about this code.

The following products are affected by CVE-2021-4441 vulnerability.

Here, you will find a curated list of external links that provide in-depth information to CVE-2021-4441.

URL	Resource
https://git.kernel.org/stable/c/2efece1368aeee2d2552c7ec36aeb676c4d4c95f
https://git.kernel.org/stable/c/3c32405d6474a21f7d742828e73c13e326dcae82
https://git.kernel.org/stable/c/ab3824427b848da10e9fe2727f035bbeecae6ff4
https://git.kernel.org/stable/c/b9dd08cbebe0c593c49bf86d2012a431494e54cb
https://git.kernel.org/stable/c/df14d2bed8e2455878e046e67123d9ecb2e79056
https://lore.kernel.org/linux-cve-announce/2024082207-CVE-2021-4441-a7bb@gregkh/T
https://nvd.nist.gov/vuln/detail/CVE-2021-4441
https://www.cve.org/CVERecord?id=CVE-2021-4441