CVE-2026-23001
macvlan: fix possible UAF in macvlan_forward_source()
CVSS Score
7.8
EPSS Score
0.0%
EPSS Percentile
0th
In the Linux kernel, the following vulnerability has been resolved: macvlan: fix possible UAF in macvlan_forward_source() Add RCU protection on (struct macvlan_source_entry)->vlan. Whenever macvlan_hash_del_source() is called, we must clear entry->vlan pointer before RCU grace period starts. This allows macvlan_forward_source() to skip over entries queued for freeing. Note that macvlan_dev are already RCU protected, as they are embedded in a standard netdev (netdev_priv(ndev)). https: //lore.kernel.org/netdev/[email protected]/T/#u
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Jan 25, 2026 |
| Last Updated | Apr 27, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
Linux / Linux
79cf79abce71eb7dbc40e2f3121048ca5405cb47 < 8133e85b8a3ec9f10d861e0002ec6037256e987e 79cf79abce71eb7dbc40e2f3121048ca5405cb47 < 484919832e2db6ce1e8add92c469e5d459a516b5 79cf79abce71eb7dbc40e2f3121048ca5405cb47 < 232afc74a6dde0fe1830988e5827921f5ec9bb3f 79cf79abce71eb7dbc40e2f3121048ca5405cb47 < 15f6faf36e162532bec5cc05eb3fc622108bf2ed 79cf79abce71eb7dbc40e2f3121048ca5405cb47 < 8518712a2ca952d6da2238c6f0a16b4ae5ea3f13 79cf79abce71eb7dbc40e2f3121048ca5405cb47 < 6dbead9c7677186f22b7981dd085a0feec1f038e 79cf79abce71eb7dbc40e2f3121048ca5405cb47 < 7470a7a63dc162f07c26dbf960e41ee1e248d80e
Linux / Linux
3.18
References
git.kernel.org: https://git.kernel.org/stable/c/8133e85b8a3ec9f10d861e0002ec6037256e987e git.kernel.org: https://git.kernel.org/stable/c/484919832e2db6ce1e8add92c469e5d459a516b5 git.kernel.org: https://git.kernel.org/stable/c/232afc74a6dde0fe1830988e5827921f5ec9bb3f git.kernel.org: https://git.kernel.org/stable/c/15f6faf36e162532bec5cc05eb3fc622108bf2ed git.kernel.org: https://git.kernel.org/stable/c/8518712a2ca952d6da2238c6f0a16b4ae5ea3f13 git.kernel.org: https://git.kernel.org/stable/c/6dbead9c7677186f22b7981dd085a0feec1f038e git.kernel.org: https://git.kernel.org/stable/c/7470a7a63dc162f07c26dbf960e41ee1e248d80e