CVE-2021-4441
Zynq Qspi SPI Linux Kernel NULL Pointer Dereference Vulnerability
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.
INFO
Published Date :
Aug. 22, 2024, 2:15 a.m.
Last Modified :
Sept. 11, 2024, 4:43 p.m.
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Remotely Exploitable :
No
Impact Score :
3.6
Exploitability Score :
1.8
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-4441.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-4441 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-4441 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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Initial Analysis by [email protected]
Sep. 11, 2024
Action Type Old Value New Value Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Changed Reference Type https://git.kernel.org/stable/c/2efece1368aeee2d2552c7ec36aeb676c4d4c95f No Types Assigned https://git.kernel.org/stable/c/2efece1368aeee2d2552c7ec36aeb676c4d4c95f Patch Changed Reference Type https://git.kernel.org/stable/c/3c32405d6474a21f7d742828e73c13e326dcae82 No Types Assigned https://git.kernel.org/stable/c/3c32405d6474a21f7d742828e73c13e326dcae82 Patch Changed Reference Type https://git.kernel.org/stable/c/ab3824427b848da10e9fe2727f035bbeecae6ff4 No Types Assigned https://git.kernel.org/stable/c/ab3824427b848da10e9fe2727f035bbeecae6ff4 Patch Changed Reference Type https://git.kernel.org/stable/c/b9dd08cbebe0c593c49bf86d2012a431494e54cb No Types Assigned https://git.kernel.org/stable/c/b9dd08cbebe0c593c49bf86d2012a431494e54cb Patch Changed Reference Type https://git.kernel.org/stable/c/df14d2bed8e2455878e046e67123d9ecb2e79056 No Types Assigned https://git.kernel.org/stable/c/df14d2bed8e2455878e046e67123d9ecb2e79056 Patch Added CWE NIST CWE-476 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.2 up to (excluding) 5.4.182 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.5 up to (excluding) 5.10.103 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.15.26 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 up to (excluding) 5.16.12 *cpe:2.3:o:linux:linux_kernel:5.17:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.17:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.17:rc3:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.17:rc4:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.17:rc5:*:*:*:*:*:* -
CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 22, 2024
Action Type Old Value New Value Added 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. Added Reference kernel.org https://git.kernel.org/stable/c/df14d2bed8e2455878e046e67123d9ecb2e79056 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/2efece1368aeee2d2552c7ec36aeb676c4d4c95f [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/3c32405d6474a21f7d742828e73c13e326dcae82 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/b9dd08cbebe0c593c49bf86d2012a431494e54cb [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/ab3824427b848da10e9fe2727f035bbeecae6ff4 [No types assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-4441 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-4441
weaknesses.