CVE-2022-49853

Advisory lineage Upstream: 0 Downstream: 10
Modified
Published: 01 May 2025, 14:10
Last modified:11 May 2026, 19:08

Vulnerability Summary

Overall Risk (default)
low
22/100
CVSS Score
5.5 MEDIUM
v3.1 (cve.org)
EPSS Score
0.05% LOW
0% probability +0.03%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

01 May 2025, 14:10
Published
Vulnerability first disclosed
11 May 2026, 19:08
Last Modified
Vulnerability information updated

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.

CVSS Metrics

  • v3.1•MEDIUM•Score: 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Trends

Current EPSS score: 0.05%• Percentile: 16%

Techniques & Countermeasures

  • CWE-401•Missing Release of Memory after Effective Lifetime

    The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.

Affected Systems

  • linux•linux

    ≥ aa5fd0fb77486b8a6764ead8627baa14790e4280, < 9f288e338be206713d79b29144c27fca4503c39b | ≥ aa5fd0fb77486b8a6764ead8627baa14790e4280, < 21d3a8b6a1e39e7529ce9de07316ee13a63f305b | ≥ aa5fd0fb77486b8a6764ead8627baa14790e4280, < a81b44d1df1f07f00c0dcc0a0b3d2fa24a46289e | ≥ aa5fd0fb77486b8a6764ead8627baa14790e4280, < 685e73e3f7a9fb75cbf049a9d0b7c45cc6b57b2e | ≥ aa5fd0fb77486b8a6764ead8627baa14790e4280, < 956e0216a19994443c90ba2ea6b0b284c9c4f9cb | ≥ aa5fd0fb77486b8a6764ead8627baa14790e4280, < a8d67367ab33604326cc37ab44fd1801bf5691ba | ≥ aa5fd0fb77486b8a6764ead8627baa14790e4280, < 9ea003c4671b2fc455320ecf6d4a43b0a3c1878a | ≥ aa5fd0fb77486b8a6764ead8627baa14790e4280, < 23569b5652ee8e8e55a12f7835f59af6f3cefc30 | 4.9

  • linux•linux_kernel

    ≥ 4.9, < 4.9.334 | ≥ 4.10, < 4.14.300 | ≥ 4.15, < 4.19.267 | ≥ 4.20, < 5.4.225 | ≥ 5.5, < 5.10.155 | ≥ 5.11, < 5.15.79 | ≥ 5.16, < 6.0.9 | 6.1:rc1 | 6.1:rc2 | 6.1:rc3 | 6.1:rc4

References (8)