CVE - CVE-2021-4441

CVE-ID
CVE-2021-4441	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
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.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/2efece1368aeee2d2552c7ec36aeb676c4d4c95f URL:https://git.kernel.org/stable/c/2efece1368aeee2d2552c7ec36aeb676c4d4c95f MISC:https://git.kernel.org/stable/c/3c32405d6474a21f7d742828e73c13e326dcae82 URL:https://git.kernel.org/stable/c/3c32405d6474a21f7d742828e73c13e326dcae82 MISC:https://git.kernel.org/stable/c/ab3824427b848da10e9fe2727f035bbeecae6ff4 URL:https://git.kernel.org/stable/c/ab3824427b848da10e9fe2727f035bbeecae6ff4 MISC:https://git.kernel.org/stable/c/b9dd08cbebe0c593c49bf86d2012a431494e54cb URL:https://git.kernel.org/stable/c/b9dd08cbebe0c593c49bf86d2012a431494e54cb MISC:https://git.kernel.org/stable/c/df14d2bed8e2455878e046e67123d9ecb2e79056 URL:https://git.kernel.org/stable/c/df14d2bed8e2455878e046e67123d9ecb2e79056
Assigning CNA
kernel.org
Date Record Created
20240822	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20240822)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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