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CVE-2021-4441 Detail

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.


Metrics

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://git.kernel.org/stable/c/2efece1368aeee2d2552c7ec36aeb676c4d4c95f Patch 
https://git.kernel.org/stable/c/3c32405d6474a21f7d742828e73c13e326dcae82 Patch 
https://git.kernel.org/stable/c/ab3824427b848da10e9fe2727f035bbeecae6ff4 Patch 
https://git.kernel.org/stable/c/b9dd08cbebe0c593c49bf86d2012a431494e54cb Patch 
https://git.kernel.org/stable/c/df14d2bed8e2455878e046e67123d9ecb2e79056 Patch 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-476 NULL Pointer Dereference cwe source acceptance level NIST  

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Change History

2 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2021-4441
NVD Published Date:
08/21/2024
NVD Last Modified:
09/11/2024
Source:
kernel.org