CVE-2022-49853
net: macvlan: fix memory leaks of macvlan_common_newlink
- Published
- Updated
- Reserved
- Assigned by
- Linux
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.
Timeline
ID reserved
By Linux
Published
- 13 months later
· 13 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.22% · top 87% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Weakness
Affected products
- affected aa5fd0fb77486b8a6764ead8627baa14790e4280 – < 9f288e338be206713d79b29144c27fca4503c39b
- affected aa5fd0fb77486b8a6764ead8627baa14790e4280 – < 21d3a8b6a1e39e7529ce9de07316ee13a63f305b
- affected aa5fd0fb77486b8a6764ead8627baa14790e4280 – < a81b44d1df1f07f00c0dcc0a0b3d2fa24a46289e
- affected aa5fd0fb77486b8a6764ead8627baa14790e4280 – < 685e73e3f7a9fb75cbf049a9d0b7c45cc6b57b2e
- affected aa5fd0fb77486b8a6764ead8627baa14790e4280 – < 956e0216a19994443c90ba2ea6b0b284c9c4f9cb
- affected aa5fd0fb77486b8a6764ead8627baa14790e4280 – < a8d67367ab33604326cc37ab44fd1801bf5691ba
- affected aa5fd0fb77486b8a6764ead8627baa14790e4280 – < 9ea003c4671b2fc455320ecf6d4a43b0a3c1878a
- affected aa5fd0fb77486b8a6764ead8627baa14790e4280 – < 23569b5652ee8e8e55a12f7835f59af6f3cefc30
- affected 4.9
- unaffected < 4.9
- unaffected 4.9.334 – ≤ 4.9.*
- unaffected 4.14.300 – ≤ 4.14.*
- unaffected 4.19.267 – ≤ 4.19.*
- unaffected 5.4.225 – ≤ 5.4.*
- unaffected 5.10.155 – ≤ 5.10.*
- unaffected 5.15.79 – ≤ 5.15.*
- unaffected 6.0.9 – ≤ 6.0.*
- unaffected 6.1 – ≤ *
References (8)
- https://git.kernel.org/stable/c/9f288e338be206713d79b29144c27fca4503c39b (opens in a new tab)
- https://git.kernel.org/stable/c/21d3a8b6a1e39e7529ce9de07316ee13a63f305b (opens in a new tab)
- https://git.kernel.org/stable/c/a81b44d1df1f07f00c0dcc0a0b3d2fa24a46289e (opens in a new tab)
- https://git.kernel.org/stable/c/685e73e3f7a9fb75cbf049a9d0b7c45cc6b57b2e (opens in a new tab)
- https://git.kernel.org/stable/c/956e0216a19994443c90ba2ea6b0b284c9c4f9cb (opens in a new tab)
- https://git.kernel.org/stable/c/a8d67367ab33604326cc37ab44fd1801bf5691ba (opens in a new tab)
- https://git.kernel.org/stable/c/9ea003c4671b2fc455320ecf6d4a43b0a3c1878a (opens in a new tab)
- https://git.kernel.org/stable/c/23569b5652ee8e8e55a12f7835f59af6f3cefc30 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2022-49853)Record last updated .