{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2023-53686", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2023-53686", "idYear": 2023, "status": "PUBLISHED", "publishedAt": "2025-10-07T15:21:38.824Z", "updatedAt": "2026-05-11T19:49:57.539Z", "importedAt": "2026-10-24T01:57:03.413Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "net/handshake: fix null-ptr-deref in handshake_nl_done_doit()", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/handshake: fix null-ptr-deref in handshake_nl_done_doit()\n\nWe should not call trace_handshake_cmd_done_err() if socket lookup has failed.\n\nAlso we should call trace_handshake_cmd_done_err() before releasing the file,\notherwise dereferencing sock->sk can return garbage.\n\nThis also reverts 7afc6d0a107f (\"net/handshake: Fix uninitialized local variable\")\n\nUnable to handle kernel paging request at virtual address dfff800000000003\nKASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f]\nMem abort info:\nESR = 0x0000000096000005\nEC = 0x25: DABT (current EL), IL = 32 bits\nSET = 0, FnV = 0\nEA = 0, S1PTW = 0\nFSC = 0x05: level 1 translation fault\nData abort info:\nISV = 0, ISS = 0x00000005, ISS2 = 0x00000000\nCM = 0, WnR = 0, TnD = 0, TagAccess = 0\nGCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0\n[dfff800000000003] address between user and kernel address ranges\nInternal error: Oops: 0000000096000005 [#1] PREEMPT SMP\nModules linked in:\nCPU: 1 PID: 5986 Comm: syz-executor292 Not tainted 6.5.0-rc7-syzkaller-gfe4469582053 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023\npstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)\npc : handshake_nl_done_doit+0x198/0x9c8 net/handshake/netlink.c:193\nlr : handshake_nl_done_doit+0x180/0x9c8\nsp : ffff800096e37180\nx29: ffff800096e37200 x28: 1ffff00012dc6e34 x27: dfff800000000000\nx26: ffff800096e373d0 x25: 0000000000000000 x24: 00000000ffffffa8\nx23: ffff800096e373f0 x22: 1ffff00012dc6e38 x21: 0000000000000000\nx20: ffff800096e371c0 x19: 0000000000000018 x18: 0000000000000000\nx17: 0000000000000000 x16: ffff800080516cc4 x15: 0000000000000001\nx14: 1fffe0001b14aa3b x13: 0000000000000000 x12: 0000000000000000\nx11: 0000000000000000 x10: 0000000000000000 x9 : 0000000000000003\nx8 : 0000000000000003 x7 : ffff800080afe47c x6 : 0000000000000000\nx5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff800080a88078\nx2 : 0000000000000001 x1 : 00000000ffffffa8 x0 : 0000000000000000\nCall trace:\nhandshake_nl_done_doit+0x198/0x9c8 net/handshake/netlink.c:193\ngenl_family_rcv_msg_doit net/netlink/genetlink.c:970 [inline]\ngenl_family_rcv_msg net/netlink/genetlink.c:1050 [inline]\ngenl_rcv_msg+0x96c/0xc50 net/netlink/genetlink.c:1067\nnetlink_rcv_skb+0x214/0x3c4 net/netlink/af_netlink.c:2549\ngenl_rcv+0x38/0x50 net/netlink/genetlink.c:1078\nnetlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline]\nnetlink_unicast+0x660/0x8d4 net/netlink/af_netlink.c:1365\nnetlink_sendmsg+0x834/0xb18 net/netlink/af_netlink.c:1914\nsock_sendmsg_nosec net/socket.c:725 [inline]\nsock_sendmsg net/socket.c:748 [inline]\n____sys_sendmsg+0x56c/0x840 net/socket.c:2494\n___sys_sendmsg net/socket.c:2548 [inline]\n__sys_sendmsg+0x26c/0x33c net/socket.c:2577\n__do_sys_sendmsg net/socket.c:2586 [inline]\n__se_sys_sendmsg net/socket.c:2584 [inline]\n__arm64_sys_sendmsg+0x80/0x94 net/socket.c:2584\n__invoke_syscall arch/arm64/kernel/syscall.c:37 [inline]\ninvoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51\nel0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136\ndo_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155\nel0_svc+0x58/0x16c arch/arm64/kernel/entry-common.c:678\nel0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696\nel0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591\nCode: 12800108 b90043e8 910062b3 d343fe68 (387b6908)", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "3b3009ea8abb713b022d94fba95ec270cf6e7eae", "status": "affected", "versionType": "git", "lessThan": "93d69f18edcca282351394c5870bec24cc99d745" }, { "version": "3b3009ea8abb713b022d94fba95ec270cf6e7eae", "status": "affected", "versionType": "git", "lessThan": "82ba0ff7bf0483d962e592017bef659ae022d754" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "6.4", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "6.4" }, { "version": "6.5.4", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.5.*" }, { "version": "6.6", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }