CVE-2021-47541
MySQL Linux Kernel Use-After-Free Vulnerability
Description
In the Linux kernel, the following vulnerability has been resolved: net/mlx4_en: Fix an use-after-free bug in mlx4_en_try_alloc_resources() In mlx4_en_try_alloc_resources(), mlx4_en_copy_priv() is called and tmp->tx_cq will be freed on the error path of mlx4_en_copy_priv(). After that mlx4_en_alloc_resources() is called and there is a dereference of &tmp->tx_cq[t][i] in mlx4_en_alloc_resources(), which could lead to a use after free problem on failure of mlx4_en_copy_priv(). Fix this bug by adding a check of mlx4_en_copy_priv() 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_MLX4_EN=m show no new warnings, and our static analyzer no longer warns about this code.
INFO
Published Date :
May 24, 2024, 3:15 p.m.
Last Modified :
Nov. 21, 2024, 6:36 a.m.
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Remotely Exploitable :
No
Impact Score :
5.9
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-2021-47541.
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-2021-47541 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-47541 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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CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://git.kernel.org/stable/c/676dc7d9b15bf8733233a2db1ec3f9091ab34275 Added Reference https://git.kernel.org/stable/c/75917372eef0dbfb290ae45474314d35f97aea18 Added Reference https://git.kernel.org/stable/c/addad7643142f500080417dd7272f49b7a185570 Added Reference https://git.kernel.org/stable/c/be12572c5ddc8ad7453bada4eec8fa46967dc757 Added Reference https://git.kernel.org/stable/c/e461a9816a1ac5b4aeb61621b817225b61e46a68 Added Reference https://git.kernel.org/stable/c/f1d43efa59f1edd3e7eca0e94559b4c6b1cd4e2b -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jun. 10, 2024
Action Type Old Value New Value -
Initial Analysis by [email protected]
Jun. 10, 2024
Action Type Old Value New Value Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Changed Reference Type https://git.kernel.org/stable/c/676dc7d9b15bf8733233a2db1ec3f9091ab34275 No Types Assigned https://git.kernel.org/stable/c/676dc7d9b15bf8733233a2db1ec3f9091ab34275 Patch Changed Reference Type https://git.kernel.org/stable/c/75917372eef0dbfb290ae45474314d35f97aea18 No Types Assigned https://git.kernel.org/stable/c/75917372eef0dbfb290ae45474314d35f97aea18 Patch Changed Reference Type https://git.kernel.org/stable/c/addad7643142f500080417dd7272f49b7a185570 No Types Assigned https://git.kernel.org/stable/c/addad7643142f500080417dd7272f49b7a185570 Patch Changed Reference Type https://git.kernel.org/stable/c/be12572c5ddc8ad7453bada4eec8fa46967dc757 No Types Assigned https://git.kernel.org/stable/c/be12572c5ddc8ad7453bada4eec8fa46967dc757 Patch Changed Reference Type https://git.kernel.org/stable/c/e461a9816a1ac5b4aeb61621b817225b61e46a68 No Types Assigned https://git.kernel.org/stable/c/e461a9816a1ac5b4aeb61621b817225b61e46a68 Patch Changed Reference Type https://git.kernel.org/stable/c/f1d43efa59f1edd3e7eca0e94559b4c6b1cd4e2b No Types Assigned https://git.kernel.org/stable/c/f1d43efa59f1edd3e7eca0e94559b4c6b1cd4e2b Patch Added CWE NIST CWE-416 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.7 up to (excluding) 4.14.257 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.15 up to (excluding) 4.19.220 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.20 up to (excluding) 5.4.164 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.5 up to (excluding) 5.10.84 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.15.7 -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 28, 2024
Action Type Old Value New Value -
CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 24, 2024
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: net/mlx4_en: Fix an use-after-free bug in mlx4_en_try_alloc_resources() In mlx4_en_try_alloc_resources(), mlx4_en_copy_priv() is called and tmp->tx_cq will be freed on the error path of mlx4_en_copy_priv(). After that mlx4_en_alloc_resources() is called and there is a dereference of &tmp->tx_cq[t][i] in mlx4_en_alloc_resources(), which could lead to a use after free problem on failure of mlx4_en_copy_priv(). Fix this bug by adding a check of mlx4_en_copy_priv() 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_MLX4_EN=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/be12572c5ddc8ad7453bada4eec8fa46967dc757 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/676dc7d9b15bf8733233a2db1ec3f9091ab34275 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/e461a9816a1ac5b4aeb61621b817225b61e46a68 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/f1d43efa59f1edd3e7eca0e94559b4c6b1cd4e2b [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/75917372eef0dbfb290ae45474314d35f97aea18 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/addad7643142f500080417dd7272f49b7a185570 [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-2021-47541 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-2021-47541
weaknesses.