{"id":"DEBIAN-CVE-2025-23145","details":"In the Linux kernel, the following vulnerability has been resolved:  mptcp: fix NULL pointer in can_accept_new_subflow  When testing valkey benchmark tool with MPTCP, the kernel panics in 'mptcp_can_accept_new_subflow' because subflow_req-\u003emsk is NULL.  Call trace:    mptcp_can_accept_new_subflow (./net/mptcp/subflow.c:63 (discriminator 4)) (P)   subflow_syn_recv_sock (./net/mptcp/subflow.c:854)   tcp_check_req (./net/ipv4/tcp_minisocks.c:863)   tcp_v4_rcv (./net/ipv4/tcp_ipv4.c:2268)   ip_protocol_deliver_rcu (./net/ipv4/ip_input.c:207)   ip_local_deliver_finish (./net/ipv4/ip_input.c:234)   ip_local_deliver (./net/ipv4/ip_input.c:254)   ip_rcv_finish (./net/ipv4/ip_input.c:449)   ...  According to the debug log, the same req received two SYN-ACK in a very short time, very likely because the client retransmits the syn ack due to multiple reasons.  Even if the packets are transmitted with a relevant time interval, they can be processed by the server on different CPUs concurrently). The 'subflow_req-\u003emsk' ownership is transferred to the subflow the first, and there will be a risk of a null pointer dereference here.  This patch fixes this issue by moving the 'subflow_req-\u003emsk' under the `own_req == true` conditional.  Note that the !msk check in subflow_hmac_valid() can be dropped, because the same check already exists under the own_req mpj branch where the code has been moved to.","modified":"2026-08-04T05:47:59.318991367Z","published":"2025-05-01T13:15:50.343Z","upstream":["CVE-2025-23145"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2025-23145"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:11","purl":"pkg:deb/debian/linux?arch=source&distro=bullseye"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.10.237-1"}]}],"versions":["5.10.103-1","5.10.103-1~bpo10+1","5.10.106-1","5.10.113-1","5.10.120-1","5.10.120-1~bpo10+1","5.10.127-1","5.10.127-2","5.10.127-2~bpo10+1","5.10.136-1","5.10.140-1","5.10.148-1","5.10.149-1","5.10.149-2","5.10.158-1","5.10.158-2","5.10.162-1","5.10.178-1","5.10.178-2","5.10.178-3","5.10.179-1","5.10.179-2","5.10.179-3","5.10.179-4","5.10.179-5","5.10.191-1","5.10.197-1","5.10.205-1","5.10.205-2","5.10.209-1","5.10.209-2","5.10.216-1","5.10.218-1","5.10.221-1","5.10.223-1","5.10.226-1","5.10.234-1","5.10.46-4","5.10.46-5","5.10.70-1","5.10.70-1~bpo10+1","5.10.84-1","5.10.92-1","5.10.92-1~bpo10+1","5.10.92-2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2025-23145.json"}},{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.135-1"}]}],"versions":["6.1.106-1","6.1.106-2","6.1.106-3","6.1.112-1","6.1.115-1","6.1.119-1","6.1.123-1","6.1.124-1","6.1.128-1","6.1.129-1","6.1.133-1","6.1.27-1","6.1.37-1","6.1.38-1","6.1.38-2","6.1.38-2~bpo11+1","6.1.38-3","6.1.38-4","6.1.38-4~bpo11+1","6.1.52-1","6.1.55-1","6.1.55-1~bpo11+1","6.1.64-1","6.1.66-1","6.1.67-1","6.1.69-1","6.1.69-1~bpo11+1","6.1.76-1","6.1.76-1~bpo11+1","6.1.82-1","6.1.85-1","6.1.90-1","6.1.90-1~bpo11+1","6.1.94-1","6.1.94-1~bpo11+1","6.1.98-1","6.1.99-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2025-23145.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.12.25-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2025-23145.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.12.25-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2025-23145.json"}},{"package":{"name":"linux-6.1","ecosystem":"Debian:11","purl":"pkg:deb/debian/linux-6.1?arch=source&distro=bullseye"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.137-1~deb11u1"}]}],"versions":["6.1.106-3~deb11u1","6.1.106-3~deb11u2","6.1.106-3~deb11u3","6.1.112-1~deb11u1","6.1.119-1~deb11u1","6.1.128-1~deb11u1","6.1.129-1~deb11u1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2025-23145.json"}}],"schema_version":"1.8.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}