{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-57882", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-01-11T14:45:42.023Z", "datePublished": "2025-01-15T13:05:35.426Z", "dateUpdated": "2026-08-05T11:46:44.414Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:46:44.414Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmptcp: fix TCP options overflow.\n\nSyzbot reported the following splat:\n\nOops: general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN PTI\nKASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]\nCPU: 1 UID: 0 PID: 5836 Comm: sshd Not tainted 6.13.0-rc3-syzkaller #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024\nRIP: 0010:_compound_head include/linux/page-flags.h:242 [inline]\nRIP: 0010:put_page+0x23/0x260 include/linux/mm.h:1552\nCode: 90 90 90 90 90 90 90 55 41 57 41 56 53 49 89 fe 48 bd 00 00 00 00 00 fc ff df e8 f8 5e 12 f8 49 8d 5e 08 48 89 d8 48 c1 e8 03 <80> 3c 28 00 74 08 48 89 df e8 8f c7 78 f8 48 8b 1b 48 89 de 48 83\nRSP: 0000:ffffc90003916c90 EFLAGS: 00010202\nRAX: 0000000000000001 RBX: 0000000000000008 RCX: ffff888030458000\nRDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000\nRBP: dffffc0000000000 R08: ffffffff898ca81d R09: 1ffff110054414ac\nR10: dffffc0000000000 R11: ffffed10054414ad R12: 0000000000000007\nR13: ffff88802a20a542 R14: 0000000000000000 R15: 0000000000000000\nFS: 00007f34f496e800(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00007f9d6ec9ec28 CR3: 000000004d260000 CR4: 00000000003526f0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n \n skb_page_unref include/linux/skbuff_ref.h:43 [inline]\n __skb_frag_unref include/linux/skbuff_ref.h:56 [inline]\n skb_release_data+0x483/0x8a0 net/core/skbuff.c:1119\n skb_release_all net/core/skbuff.c:1190 [inline]\n __kfree_skb+0x55/0x70 net/core/skbuff.c:1204\n tcp_clean_rtx_queue net/ipv4/tcp_input.c:3436 [inline]\n tcp_ack+0x2442/0x6bc0 net/ipv4/tcp_input.c:4032\n tcp_rcv_state_process+0x8eb/0x44e0 net/ipv4/tcp_input.c:6805\n tcp_v4_do_rcv+0x77d/0xc70 net/ipv4/tcp_ipv4.c:1939\n tcp_v4_rcv+0x2dc0/0x37f0 net/ipv4/tcp_ipv4.c:2351\n ip_protocol_deliver_rcu+0x22e/0x440 net/ipv4/ip_input.c:205\n ip_local_deliver_finish+0x341/0x5f0 net/ipv4/ip_input.c:233\n NF_HOOK+0x3a4/0x450 include/linux/netfilter.h:314\n NF_HOOK+0x3a4/0x450 include/linux/netfilter.h:314\n __netif_receive_skb_one_core net/core/dev.c:5672 [inline]\n __netif_receive_skb+0x2bf/0x650 net/core/dev.c:5785\n process_backlog+0x662/0x15b0 net/core/dev.c:6117\n __napi_poll+0xcb/0x490 net/core/dev.c:6883\n napi_poll net/core/dev.c:6952 [inline]\n net_rx_action+0x89b/0x1240 net/core/dev.c:7074\n handle_softirqs+0x2d4/0x9b0 kernel/softirq.c:561\n __do_softirq kernel/softirq.c:595 [inline]\n invoke_softirq kernel/softirq.c:435 [inline]\n __irq_exit_rcu+0xf7/0x220 kernel/softirq.c:662\n irq_exit_rcu+0x9/0x30 kernel/softirq.c:678\n instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]\n sysvec_apic_timer_interrupt+0x57/0xc0 arch/x86/kernel/apic/apic.c:1049\n asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702\nRIP: 0033:0x7f34f4519ad5\nCode: 85 d2 74 0d 0f 10 02 48 8d 54 24 20 0f 11 44 24 20 64 8b 04 25 18 00 00 00 85 c0 75 27 41 b8 08 00 00 00 b8 0f 01 00 00 0f 05 <48> 3d 00 f0 ff ff 76 75 48 8b 15 24 73 0d 00 f7 d8 64 89 02 48 83\nRSP: 002b:00007ffec5b32ce0 EFLAGS: 00000246\nRAX: 0000000000000001 RBX: 00000000000668a0 RCX: 00007f34f4519ad5\nRDX: 00007ffec5b32d00 RSI: 0000000000000004 RDI: 0000564f4bc6cae0\nRBP: 0000564f4bc6b5a0 R08: 0000000000000008 R09: 0000000000000000\nR10: 00007ffec5b32de8 R11: 0000000000000246 R12: 0000564f48ea8aa4\nR13: 0000000000000001 R14: 0000564f48ea93e8 R15: 00007ffec5b32d68\n \n\nEric noted a probable shinfo->nr_frags corruption, which indeed\noccurs.\n\nThe root cause is a buggy MPTCP option len computation in some\ncircumstances: the ADD_ADDR option should be mutually exclusive\nwith DSS since the blamed commit.\n\nStill, mptcp_established_options_add_addr() tries to set the\nrelevant info in mptcp_out_options, if \n---truncated---" } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL" }, "scenarios": [ { "lang": "en", "value": "AV:N - The bug is in the MPTCP option-generation path of the TCP/IP stack and is driven by a remote peer establishing an MPTCP connection and exchanging data/ADD_ADDR options with the host; a remote ADD_ADDR directly queues the echo that corrupts the DSS union, and on a standard multi-homed MPTCP server with a `signal` endpoint any remote client triggers the ahmac-based length overflow. No local access is needed.\nAC:L - The attacker can repeat the attempt over arbitrarily many MPTCP connections and directly influences the option layout (TCP timestamp and MPTCP checksum negotiation, window/data flow, sending ADD_ADDR), so the probabilistic HMAC-bit condition is defeated by simple repetition rather than being beyond attacker control.\nPR:N - Triggering only requires completing the MPTCP handshake and exchanging data with the target — no credentials or application-level authentication are involved, since the ADD_ADDR/DSS exchange happens in the kernel transport layer.\nUI:N - The ADD_ADDR signal/echo is emitted automatically by the kernel path manager on outgoing packets; no local user action is required.\nS:U - The out-of-bounds write and the memory disclosure are confined to kernel memory within the same security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - Reserved-but-unwritten TCP option bytes (up to ~20 bytes of uninitialized skb headroom) are transmitted to the remote peer, directly leaking kernel heap contents, and the corrupted `skb_shared_info->nr_frags` causes garbage frag entries to be walked, which can expose further memory.\nI:H - This is an out-of-bounds heap write past the end of the TCP header into `skb_shared_info` (`flags`, `meta_len`, `nr_frags`, `tx_flags`), corrupting adjacent kernel structures — a memory-corruption primitive usable for page refcount manipulation and further escalation.\nA:H - The confirmed syzbot outcome is a general protection fault in `put_page()` from `skb_release_data()` during `tcp_clean_rtx_queue()` — a kernel crash reachable from ordinary MPTCP traffic." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/mptcp/options.c" ], "versions": [ { "version": "1bff1e43a30e2f7500a49d47fd26a425643a6a37", "lessThan": "88b01048f286bb522f524ad99943ba86797d6514", "status": "affected", "versionType": "git" }, { "version": "1bff1e43a30e2f7500a49d47fd26a425643a6a37", "lessThan": "09ba95321a269019b5aa8e0c3bc80cf86d91fd18", "status": "affected", "versionType": "git" }, { "version": "1bff1e43a30e2f7500a49d47fd26a425643a6a37", "lessThan": "53fe947f67c93a5334aed3a7259fcc8a204f8bb6", "status": "affected", "versionType": "git" }, { "version": "1bff1e43a30e2f7500a49d47fd26a425643a6a37", "lessThan": "fb08e6b0ba284e3dcdc9378de26dcb51d90710f5", "status": "affected", "versionType": "git" }, { "version": "1bff1e43a30e2f7500a49d47fd26a425643a6a37", "lessThan": "cbb26f7d8451fe56ccac802c6db48d16240feebd", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/mptcp/options.c" ], "versions": [ { "version": "5.15", "status": "affected" }, { "version": "0", "lessThan": "5.15", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.177", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.124", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.70", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.9", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.13", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "5.15.177" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.1.124" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.6.70" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.12.9" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.13" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/88b01048f286bb522f524ad99943ba86797d6514" }, { "url": "https://git.kernel.org/stable/c/09ba95321a269019b5aa8e0c3bc80cf86d91fd18" }, { "url": "https://git.kernel.org/stable/c/53fe947f67c93a5334aed3a7259fcc8a204f8bb6" }, { "url": "https://git.kernel.org/stable/c/fb08e6b0ba284e3dcdc9378de26dcb51d90710f5" }, { "url": "https://git.kernel.org/stable/c/cbb26f7d8451fe56ccac802c6db48d16240feebd" } ], "title": "mptcp: fix TCP options overflow.", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "title": "CVE Program Container", "references": [ { "url": "http://www.openwall.com/lists/oss-security/2025/04/01/3" }, { "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html" } ], "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T20:54:51.339Z" } } ] } }