[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"repo-stars":3,"vuln-DEBIAN-CVE-2026-23209":6},{"stargazers_count":4,"fetched_at":5},7,"2026-06-04T14:53:31.930Z",{"id":7,"descriptions":8,"cisa":9,"weaknesses":10,"exploits":11,"aliases":12,"duplicate_of":9,"upstream":13,"downstream":16,"duplicates":25,"related":26,"reserved_at":9,"published_at":27,"modified_at":28,"state":9,"summary":29,"references_raw":31,"kevs":38,"epss":9,"epss_history":39,"metrics":40,"affected":47},"DEBIAN-CVE-2026-23209","In the Linux kernel, the following vulnerability has been resolved:  macvlan: fix error recovery in macvlan_common_newlink()  valis provided a nice repro to crash the kernel:  ip link add p1 type veth peer p2 ip link set address 00:00:00:00:00:20 dev p1 ip link set up dev p1 ip link set up dev p2  ip link add mv0 link p2 type macvlan mode source ip link add invalid% link p2 type macvlan mode source macaddr add 00:00:00:00:00:20  ping -c1 -I p1 1.2.3.4  He also gave a very detailed analysis:  \u003Cquote valis>  The issue is triggered when a new macvlan link is created  with MACVLAN_MODE_SOURCE mode and MACVLAN_MACADDR_ADD (or MACVLAN_MACADDR_SET) parameter, lower device already has a macvlan port and register_netdevice() called from macvlan_common_newlink() fails (e.g. because of the invalid link name).  In this case macvlan_hash_add_source is called from macvlan_change_sources() / macvlan_common_newlink():  This adds a reference to vlan to the port's vlan_source_hash using macvlan_source_entry.  vlan is a pointer to the priv data of the link that is being created.  When register_netdevice() fails, the error is returned from macvlan_newlink() to rtnl_newlink_create():          if (ops->newlink)                 err = ops->newlink(dev, &params, extack);         else                 err = register_netdevice(dev);         if (err \u003C 0) {                 free_netdev(dev);                 goto out;         }  and free_netdev() is called, causing a kvfree() on the struct net_device that is still referenced in the source entry attached to the lower device's macvlan port.  Now all packets sent on the macvlan port with a matching source mac address will trigger a use-after-free in macvlan_forward_source().  \u003C/quote valis>  With all that, my fix is to make sure we call macvlan_flush_sources() regardless of @create value whenever \"goto destroy_macvlan_port;\" path is taken.  Many thanks to valis for following up on this issue.",null,[],[],[],[14],{"_key":15},"CVE-2026-23209",[17,19,21,23],{"_key":18},"DSA-6141-1",{"_key":20},"DLA-4498-1",{"_key":22},"DLA-4499-1",{"_key":24},"DSA-6163-1",[],[],"2026-02-14T17:15:58.803Z","2026-04-28T20:31:14.651752Z",{"cisa_kev":30,"cisa_ransomware":30,"cisa_vendor":9,"epss_severity":9,"epss_score":9,"severity":9,"severity_score":9,"severity_version":9,"severity_source":9,"severity_vector":9,"severity_status":9},false,[32],{"url":33,"sources":34,"tags":36},"https://security-tracker.debian.org/tracker/CVE-2026-23209",[35],"osv_debian",[37],"Advisory",[],[],[41],{"source":35,"cvss_v2_0":9,"cvss_v3_0":9,"cvss_v3_1":42,"cvss_v4_0":9},{"baseScore":43,"baseSeverity":9,"vectorString":44,"impactScore":45,"exploitabilityScore":46},7.8,"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",9.8,4.6,[48,74],{"ecosystem":49,"name":50,"vendor":51,"product":50,"cpe_part":9,"purl_type":52,"purl_namespace":51,"purl_name":50,"source":9,"versions":53},"Debian","linux","debian","deb",[54,58,59,60,61,65,68,71],{"version":55,"is_range":56,"range_type":57,"version_start":9,"version_start_type":9,"version_end":9,"version_end_type":9,"fixed_in":9},"all",true,"ecosystem",{"version":55,"is_range":56,"range_type":57,"version_start":9,"version_start_type":9,"version_end":9,"version_end_type":9,"fixed_in":9},{"version":55,"is_range":56,"range_type":57,"version_start":9,"version_start_type":9,"version_end":9,"version_end_type":9,"fixed_in":9},{"version":55,"is_range":56,"range_type":57,"version_start":9,"version_start_type":9,"version_end":9,"version_end_type":9,"fixed_in":9},{"version":62,"is_range":56,"range_type":57,"version_start":9,"version_start_type":9,"version_end":63,"version_end_type":64,"fixed_in":9},"lt5_10_251_1","5.10.251-1","excluding",{"version":66,"is_range":56,"range_type":57,"version_start":9,"version_start_type":9,"version_end":67,"version_end_type":64,"fixed_in":9},"lt6_1_164_1","6.1.164-1",{"version":69,"is_range":56,"range_type":57,"version_start":9,"version_start_type":9,"version_end":70,"version_end_type":64,"fixed_in":9},"lt6_12_73_1","6.12.73-1",{"version":72,"is_range":56,"range_type":57,"version_start":9,"version_start_type":9,"version_end":73,"version_end_type":64,"fixed_in":9},"lt6_18_10_1","6.18.10-1",{"ecosystem":49,"name":75,"vendor":51,"product":75,"cpe_part":9,"purl_type":52,"purl_namespace":51,"purl_name":75,"source":9,"versions":76},"linux-6.1",[77],{"version":78,"is_range":56,"range_type":57,"version_start":9,"version_start_type":9,"version_end":79,"version_end_type":64,"fixed_in":9},"lt6_1_164_1~deb11u1","6.1.164-1~deb11u1"]