CVE-2022-49853
Linux Kernel Macvlan Memory Leak Vulnerability
Description
In the Linux kernel, the following vulnerability has been resolved: net: macvlan: fix memory leaks of macvlan_common_newlink kmemleak reports memory leaks in macvlan_common_newlink, as follows: ip link add link eth0 name .. type macvlan mode source macaddr add <MAC-ADDR> kmemleak reports: unreferenced object 0xffff8880109bb140 (size 64): comm "ip", pid 284, jiffies 4294986150 (age 430.108s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 b8 aa 5a 12 80 88 ff ff ..........Z..... 80 1b fa 0d 80 88 ff ff 1e ff ac af c7 c1 6b 6b ..............kk backtrace: [<ffffffff813e06a7>] kmem_cache_alloc_trace+0x1c7/0x300 [<ffffffff81b66025>] macvlan_hash_add_source+0x45/0xc0 [<ffffffff81b66a67>] macvlan_changelink_sources+0xd7/0x170 [<ffffffff81b6775c>] macvlan_common_newlink+0x38c/0x5a0 [<ffffffff81b6797e>] macvlan_newlink+0xe/0x20 [<ffffffff81d97f8f>] __rtnl_newlink+0x7af/0xa50 [<ffffffff81d98278>] rtnl_newlink+0x48/0x70 ... In the scenario where the macvlan mode is configured as 'source', macvlan_changelink_sources() will be execured to reconfigure list of remote source mac addresses, at the same time, if register_netdevice() return an error, the resource generated by macvlan_changelink_sources() is not cleaned up. Using this patch, in the case of an error, it will execute macvlan_flush_sources() to ensure that the resource is cleaned up.
INFO
Published Date :
May 1, 2025, 3:16 p.m.
Last Modified :
May 7, 2025, 1:32 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-2022-49853.
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).
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The following list is the news that have been mention
CVE-2022-49853 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2022-49853 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]
May. 07, 2025
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Added CWE CWE-401 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:6.1:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.1:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.1:rc3:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.1:rc4:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.20 up to (excluding) 5.4.225 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.15 up to (excluding) 4.19.267 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.10 up to (excluding) 4.14.300 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.15.79 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 up to (excluding) 6.0.9 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.5 up to (excluding) 5.10.155 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.9 up to (excluding) 4.9.334 Added Reference Type kernel.org: https://git.kernel.org/stable/c/21d3a8b6a1e39e7529ce9de07316ee13a63f305b Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/23569b5652ee8e8e55a12f7835f59af6f3cefc30 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/685e73e3f7a9fb75cbf049a9d0b7c45cc6b57b2e Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/956e0216a19994443c90ba2ea6b0b284c9c4f9cb Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/9ea003c4671b2fc455320ecf6d4a43b0a3c1878a Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/9f288e338be206713d79b29144c27fca4503c39b Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/a81b44d1df1f07f00c0dcc0a0b3d2fa24a46289e Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/a8d67367ab33604326cc37ab44fd1801bf5691ba Types: Patch -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 01, 2025
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: net: macvlan: fix memory leaks of macvlan_common_newlink kmemleak reports memory leaks in macvlan_common_newlink, as follows: ip link add link eth0 name .. type macvlan mode source macaddr add <MAC-ADDR> kmemleak reports: unreferenced object 0xffff8880109bb140 (size 64): comm "ip", pid 284, jiffies 4294986150 (age 430.108s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 b8 aa 5a 12 80 88 ff ff ..........Z..... 80 1b fa 0d 80 88 ff ff 1e ff ac af c7 c1 6b 6b ..............kk backtrace: [<ffffffff813e06a7>] kmem_cache_alloc_trace+0x1c7/0x300 [<ffffffff81b66025>] macvlan_hash_add_source+0x45/0xc0 [<ffffffff81b66a67>] macvlan_changelink_sources+0xd7/0x170 [<ffffffff81b6775c>] macvlan_common_newlink+0x38c/0x5a0 [<ffffffff81b6797e>] macvlan_newlink+0xe/0x20 [<ffffffff81d97f8f>] __rtnl_newlink+0x7af/0xa50 [<ffffffff81d98278>] rtnl_newlink+0x48/0x70 ... In the scenario where the macvlan mode is configured as 'source', macvlan_changelink_sources() will be execured to reconfigure list of remote source mac addresses, at the same time, if register_netdevice() return an error, the resource generated by macvlan_changelink_sources() is not cleaned up. Using this patch, in the case of an error, it will execute macvlan_flush_sources() to ensure that the resource is cleaned up. Added Reference https://git.kernel.org/stable/c/21d3a8b6a1e39e7529ce9de07316ee13a63f305b Added Reference https://git.kernel.org/stable/c/23569b5652ee8e8e55a12f7835f59af6f3cefc30 Added Reference https://git.kernel.org/stable/c/685e73e3f7a9fb75cbf049a9d0b7c45cc6b57b2e Added Reference https://git.kernel.org/stable/c/956e0216a19994443c90ba2ea6b0b284c9c4f9cb Added Reference https://git.kernel.org/stable/c/9ea003c4671b2fc455320ecf6d4a43b0a3c1878a Added Reference https://git.kernel.org/stable/c/9f288e338be206713d79b29144c27fca4503c39b Added Reference https://git.kernel.org/stable/c/a81b44d1df1f07f00c0dcc0a0b3d2fa24a46289e Added Reference https://git.kernel.org/stable/c/a8d67367ab33604326cc37ab44fd1801bf5691ba
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2022-49853 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-2022-49853
weaknesses.