7.8
HIGH
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 :

June 10, 2024, 6:34 p.m.

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67

Remotely Exploitable :

No

Impact Score :

5.9

Exploitability Score :

1.8
Affected Products

The following products are affected by CVE-2021-47541 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Linux linux_kernel
: Total Affected Vendor : 1 | Products : 1
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.

URL Resource
https://git.kernel.org/stable/c/676dc7d9b15bf8733233a2db1ec3f9091ab34275 Patch
https://git.kernel.org/stable/c/75917372eef0dbfb290ae45474314d35f97aea18 Patch
https://git.kernel.org/stable/c/addad7643142f500080417dd7272f49b7a185570 Patch
https://git.kernel.org/stable/c/be12572c5ddc8ad7453bada4eec8fa46967dc757 Patch
https://git.kernel.org/stable/c/e461a9816a1ac5b4aeb61621b817225b61e46a68 Patch
https://git.kernel.org/stable/c/f1d43efa59f1edd3e7eca0e94559b4c6b1cd4e2b Patch

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.

  • 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]
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
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.

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
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