{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2024-56643 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2024-56643 is a low-severity denial of service vulnerability in Linux kernel, published on 27 Dec 2024. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2024-56643 and fix it if it is affected.\n\nWhat it is: CVE-2024-56643 is a low-severity denial of service vulnerability in Linux kernel, published on 27 Dec 2024. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2024-56643 in the wild and no public exploit code.\n\nAffected product: Linux kernel. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2024-56643/ (Markdown: https://insights.sbomify.com/CVE-2024-56643/index.md)","id":"CVE-2024-56643","markdown":"https://insights.sbomify.com/CVE-2024-56643/index.md","name":"CVE-2024-56643","record":{"aliases":["AZL-54744","AZL-54917","BELL-CVE-2024-56643","DEBIAN-CVE-2024-56643","GHSA-g2f4-7x3w-9r2x","UBUNTU-CVE-2024-56643"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel","requires_auth":"low_privilege","summary":"A memory leak in the Linux kernel's DCCP implementation allows attackers to exhaust system memory, leading to denial of service.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[{"product":"linux_kernel","vendor":"linux"}],"cvss":{"score":3.3,"severity":"low","source":"cisa-adp","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L","version":"3.1"},"cwes":[{"id":"CWE-401","name":"Missing Release of Memory after Effective Lifetime"}],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndccp: Fix memory leak in dccp_feat_change_recv\n\nIf dccp_feat_push_confirm() fails after new value for SP feature was accepted\nwithout reconciliation ('entry == NULL' branch), memory allocated for that value\nwith dccp_feat_clone_sp_val() is never freed.\n\nHere is the kmemleak stack for this:\n\nunreferenced object 0xffff88801d4ab488 (size 8):\n  comm \"syz-executor310\", pid 1127, jiffies 4295085598 (age 41.666s)\n  hex dump (first 8 bytes):\n    01 b4 4a 1d 80 88 ff ff                          ..J.....\n  backtrace:\n    [\u003c00000000db7cabfe\u003e] kmemdup+0x23/0x50 mm/util.c:128\n    [\u003c0000000019b38405\u003e] kmemdup include/linux/string.h:465 [inline]\n    [\u003c0000000019b38405\u003e] dccp_feat_clone_sp_val net/dccp/feat.c:371 [inline]\n    [\u003c0000000019b38405\u003e] dccp_feat_clone_sp_val net/dccp/feat.c:367 [inline]\n    [\u003c0000000019b38405\u003e] dccp_feat_change_recv net/dccp/feat.c:1145 [inline]\n    [\u003c0000000019b38405\u003e] dccp_feat_parse_options+0x1196/0x2180 net/dccp/feat.c:1416\n    [\u003c00000000b1f6d94a\u003e] dccp_parse_options+0xa2a/0x1260 net/dccp/options.c:125\n    [\u003c0000000030d7b621\u003e] dccp_rcv_state_process+0x197/0x13d0 net/dccp/input.c:650\n    [\u003c000000001f74c72e\u003e] dccp_v4_do_rcv+0xf9/0x1a0 net/dccp/ipv4.c:688\n    [\u003c00000000a6c24128\u003e] sk_backlog_rcv include/net/sock.h:1041 [inline]\n    [\u003c00000000a6c24128\u003e] __release_sock+0x139/0x3b0 net/core/sock.c:2570\n    [\u003c00000000cf1f3a53\u003e] release_sock+0x54/0x1b0 net/core/sock.c:3111\n    [\u003c000000008422fa23\u003e] inet_wait_for_connect net/ipv4/af_inet.c:603 [inline]\n    [\u003c000000008422fa23\u003e] __inet_stream_connect+0x5d0/0xf70 net/ipv4/af_inet.c:696\n    [\u003c0000000015b6f64d\u003e] inet_stream_connect+0x53/0xa0 net/ipv4/af_inet.c:735\n    [\u003c0000000010122488\u003e] __sys_connect_file+0x15c/0x1a0 net/socket.c:1865\n    [\u003c00000000b4b70023\u003e] __sys_connect+0x165/0x1a0 net/socket.c:1882\n    [\u003c00000000f4cb3815\u003e] __do_sys_connect net/socket.c:1892 [inline]\n    [\u003c00000000f4cb3815\u003e] __se_sys_connect net/socket.c:1889 [inline]\n    [\u003c00000000f4cb3815\u003e] __x64_sys_connect+0x6e/0xb0 net/socket.c:1889\n    [\u003c00000000e7b1e839\u003e] do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46\n    [\u003c0000000055e91434\u003e] entry_SYSCALL_64_after_hwframe+0x67/0xd1\n\nClean up the allocated memory in case of dccp_feat_push_confirm() failure\nand bail out with an error reset code.\n\nFound by Linux Verification Center (linuxtesting.org) with Syzkaller.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"dccp: Fix memory leak in dccp_feat_change_recv","id":"CVE-2024-56643","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel"],"type":"denial_of_service","year":"2024"},"n_packages":0,"n_references":7,"next":{"headline":"net/ipv6: release expired exception dst cached in socket","id":"CVE-2024-56644"},"packages":[],"prev":{"headline":"tipc: Fix use-after-free of kernel socket in cleanup_bearer().","id":"CVE-2024-56642"},"products":["Linux"],"published":"2024-12-27","related":[{"cvss_score":8.8,"headline":"Linux Kernel Out-of-Bounds Write","id":"CVE-2026-53266","kev_date_added":"2026-09-18","published":"2026-06-25"},{"cvss_score":8.8,"headline":"Linux Kernel Improper Input Validation","id":"CVE-2013-6282","kev_date_added":"2022-09-15","published":"2013-11-19"},{"cvss_score":8.4,"headline":"Linux Kernel Heap-Based Buffer Overflow","id":"CVE-2022-0185","kev_date_added":"2024-08-21","published":"2022-02-11"},{"cvss_score":8.4,"headline":"Linux Kernel Privilege Escalation","id":"CVE-2013-2094","kev_date_added":"2022-09-15","published":"2013-05-14"},{"cvss_score":7.8,"headline":"Linux Kernel Unspecified","id":"CVE-2026-53362","kev_date_added":"2026-08-27","published":"2026-07-04"},{"cvss_score":7.8,"headline":"Linux Kernel Missing Initialization of a Variable","id":"CVE-2026-46300","kev_date_added":"2026-10-28","published":"2026-05-23"},{"cvss_score":7.8,"headline":"Linux Kernel Race Condition","id":"CVE-2025-39964","kev_date_added":"2026-09-18","published":"2025-10-13"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-05-11","vendors":["Linux"]},"summary":"A memory leak in the Linux kernel's DCCP implementation allows attackers to exhaust system memory, leading to denial of service.","url":"https://insights.sbomify.com/CVE-2024-56643/"}