{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2023-52778 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2023-52778 is a medium-severity denial of service vulnerability in Linux kernel, published on 21 May 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-2023-52778 and fix it if it is affected.\n\nWhat it is: CVE-2023-52778 is a medium-severity denial of service vulnerability in Linux kernel, published on 21 May 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-2023-52778 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-2023-52778/ (Markdown: https://insights.sbomify.com/CVE-2023-52778/index.md)","id":"CVE-2023-52778","markdown":"https://insights.sbomify.com/CVE-2023-52778/index.md","name":"CVE-2023-52778","record":{"aliases":["BELL-CVE-2023-52778","DEBIAN-CVE-2023-52778","GHSA-7prp-hfw8-9qcp","UBUNTU-CVE-2023-52778"],"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 flaw in the Linux kernel MPTCP implementation allows remote attackers to cause a denial of service via large GSO sizes.","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":5.5,"severity":"medium","source":"nvd","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmptcp: deal with large GSO size\n\nAfter the blamed commit below, the TCP sockets (and the MPTCP subflows)\ncan build egress packets larger than 64K. That exceeds the maximum DSS\ndata size, the length being misrepresent on the wire and the stream being\ncorrupted, as later observed on the receiver:\n\n  WARNING: CPU: 0 PID: 9696 at net/mptcp/protocol.c:705 __mptcp_move_skbs_from_subflow+0x2604/0x26e0\n  CPU: 0 PID: 9696 Comm: syz-executor.7 Not tainted 6.6.0-rc5-gcd8bdf563d46 #45\n  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.11.0-2.el7 04/01/2014\n  netlink: 8 bytes leftover after parsing attributes in process `syz-executor.4'.\n  RIP: 0010:__mptcp_move_skbs_from_subflow+0x2604/0x26e0 net/mptcp/protocol.c:705\n  RSP: 0018:ffffc90000006e80 EFLAGS: 00010246\n  RAX: ffffffff83e9f674 RBX: ffff88802f45d870 RCX: ffff888102ad0000\n  netlink: 8 bytes leftover after parsing attributes in process `syz-executor.4'.\n  RDX: 0000000080000303 RSI: 0000000000013908 RDI: 0000000000003908\n  RBP: ffffc90000007110 R08: ffffffff83e9e078 R09: 1ffff1100e548c8a\n  R10: dffffc0000000000 R11: ffffed100e548c8b R12: 0000000000013908\n  R13: dffffc0000000000 R14: 0000000000003908 R15: 000000000031cf29\n  FS:  00007f239c47e700(0000) GS:ffff88811b200000(0000) knlGS:0000000000000000\n  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n  CR2: 00007f239c45cd78 CR3: 000000006a66c006 CR4: 0000000000770ef0\n  DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n  DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600\n  PKRU: 55555554\n  Call Trace:\n   \u003cIRQ\u003e\n   mptcp_data_ready+0x263/0xac0 net/mptcp/protocol.c:819\n   subflow_data_ready+0x268/0x6d0 net/mptcp/subflow.c:1409\n   tcp_data_queue+0x21a1/0x7a60 net/ipv4/tcp_input.c:5151\n   tcp_rcv_established+0x950/0x1d90 net/ipv4/tcp_input.c:6098\n   tcp_v6_do_rcv+0x554/0x12f0 net/ipv6/tcp_ipv6.c:1483\n   tcp_v6_rcv+0x2e26/0x3810 net/ipv6/tcp_ipv6.c:1749\n   ip6_protocol_deliver_rcu+0xd6b/0x1ae0 net/ipv6/ip6_input.c:438\n   ip6_input+0x1c5/0x470 net/ipv6/ip6_input.c:483\n   ipv6_rcv+0xef/0x2c0 include/linux/netfilter.h:304\n   __netif_receive_skb+0x1ea/0x6a0 net/core/dev.c:5532\n   process_backlog+0x353/0x660 net/core/dev.c:5974\n   __napi_poll+0xc6/0x5a0 net/core/dev.c:6536\n   net_rx_action+0x6a0/0xfd0 net/core/dev.c:6603\n   __do_softirq+0x184/0x524 kernel/softirq.c:553\n   do_softirq+0xdd/0x130 kernel/softirq.c:454\n\nAddress the issue explicitly bounding the maximum GSO size to what MPTCP\nactually allows.","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":"mptcp: deal with large GSO size","id":"CVE-2023-52778","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel"],"type":"denial_of_service","year":"2023"},"n_packages":0,"n_references":4,"next":{"headline":"fs: Pass AT_GETATTR_NOSEC flag to getattr interface function","id":"CVE-2023-52779"},"packages":[],"prev":{"headline":"wifi: ath11k: fix gtk offload status event locking","id":"CVE-2023-52777"},"products":["Linux"],"published":"2024-05-21","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":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-05-11","vendors":["Linux"]},"summary":"A flaw in the Linux kernel MPTCP implementation allows remote attackers to cause a denial of service via large GSO sizes.","url":"https://insights.sbomify.com/CVE-2023-52778/"}