CVE-2024-36889— mptcp: ensure snd_nxt is properly initialized on connect
Affected Version Matrix 14
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 8fd738049ac3d67a937d36577763b47180aae1ad< 99951b62bf20cec9247f633a3bea898338b9e5b4 | affected |
8fd738049ac3d67a937d36577763b47180aae1ad< dc941fec0719d0471a5902424d6b2a17df233193 | affected | ||
8fd738049ac3d67a937d36577763b47180aae1ad< 39ca83ed73db9edcc6d70c0dc7a73085a4725012 | affected | ||
8fd738049ac3d67a937d36577763b47180aae1ad< aa0c07c1f20e05b30019bff083ec43665536f06f | affected | ||
8fd738049ac3d67a937d36577763b47180aae1ad< 592f69b41766d366dbb8ff4ef5a67c4396527bbe | affected | ||
8fd738049ac3d67a937d36577763b47180aae1ad< fb7a0d334894206ae35f023a82cad5a290fd7386 | affected | ||
5.9 | affected | ||
< 5.9 | unaffected | ||
| … +6 more rows | |||
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I. Basic Information for CVE-2024-36889
Vulnerability Information
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Vulnerability Title
mptcp: ensure snd_nxt is properly initialized on connect
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: mptcp: ensure snd_nxt is properly initialized on connect Christoph reported a splat hinting at a corrupted snd_una: WARNING: CPU: 1 PID: 38 at net/mptcp/protocol.c:1005 __mptcp_clean_una+0x4b3/0x620 net/mptcp/protocol.c:1005 Modules linked in: CPU: 1 PID: 38 Comm: kworker/1:1 Not tainted 6.9.0-rc1-gbbeac67456c9 #59 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.11.0-2.el7 04/01/2014 Workqueue: events mptcp_worker RIP: 0010:__mptcp_clean_una+0x4b3/0x620 net/mptcp/protocol.c:1005 Code: be 06 01 00 00 bf 06 01 00 00 e8 a8 12 e7 fe e9 00 fe ff ff e8 8e 1a e7 fe 0f b7 ab 3e 02 00 00 e9 d3 fd ff ff e8 7d 1a e7 fe <0f> 0b 4c 8b bb e0 05 00 00 e9 74 fc ff ff e8 6a 1a e7 fe 0f 0b e9 RSP: 0018:ffffc9000013fd48 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff8881029bd280 RCX: ffffffff82382fe4 RDX: ffff8881003cbd00 RSI: ffffffff823833c3 RDI: 0000000000000001 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: fefefefefefefeff R12: ffff888138ba8000 R13: 0000000000000106 R14: ffff8881029bd908 R15: ffff888126560000 FS: 0000000000000000(0000) GS:ffff88813bd00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f604a5dae38 CR3: 0000000101dac002 CR4: 0000000000170ef0 Call Trace: <TASK> __mptcp_clean_una_wakeup net/mptcp/protocol.c:1055 [inline] mptcp_clean_una_wakeup net/mptcp/protocol.c:1062 [inline] __mptcp_retrans+0x7f/0x7e0 net/mptcp/protocol.c:2615 mptcp_worker+0x434/0x740 net/mptcp/protocol.c:2767 process_one_work+0x1e0/0x560 kernel/workqueue.c:3254 process_scheduled_works kernel/workqueue.c:3335 [inline] worker_thread+0x3c7/0x640 kernel/workqueue.c:3416 kthread+0x121/0x170 kernel/kthread.c:388 ret_from_fork+0x44/0x50 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243 </TASK> When fallback to TCP happens early on a client socket, snd_nxt is not yet initialized and any incoming ack will copy such value into snd_una. If the mptcp worker (dumbly) tries mptcp-level re-injection after such ack, that would unconditionally trigger a send buffer cleanup using 'bad' snd_una values. We could easily disable re-injection for fallback sockets, but such dumb behavior already helped catching a few subtle issues and a very low to zero impact in practice. Instead address the issue always initializing snd_nxt (and write_seq, for consistency) at connect time.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel 存在安全漏洞，该漏洞源于 mptcp 模块确保 snd_nxt 在连接时正确初始化。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2024-36889
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · Linux · 2024-05-30 · 93 CVEs total
| CVE-2024-36927 | ipv4: Fix uninit-value access in __ip_make_skb() | |
| CVE-2024-36922 | wifi: iwlwifi: read txq->read_ptr under lock | |
| CVE-2024-36920 | scsi: mpi3mr: Avoid memcpy field-spanning write WARNING | |
| CVE-2024-36916 | blk-iocost: avoid out of bounds shift | |
| CVE-2024-36917 | block: fix overflow in blk_ioctl_discard() | |
| CVE-2024-36914 | drm/amd/display: Skip on writeback when it's not applicable | |
| CVE-2024-36915 | nfc: llcp: fix nfc_llcp_setsockopt() unsafe copies | |
| CVE-2024-36913 | Drivers: hv: vmbus: Leak pages if set_memory_encrypted() fails | |
| CVE-2024-36919 | scsi: bnx2fc: Remove spin_lock_bh while releasing resources after upload | |
| CVE-2024-36925 | swiotlb: initialise restricted pool list_head when SWIOTLB_DYNAMIC=y | |
| CVE-2024-36924 | scsi: lpfc: Release hbalock before calling lpfc_worker_wake_up() | |
| CVE-2024-36926 | powerpc/pseries/iommu: LPAR panics during boot up with a frozen PE | |
| CVE-2024-36928 | s390/qeth: Fix kernel panic after setting hsuid | |
| CVE-2024-36929 | net: core: reject skb_copy(_expand) for fraglist GSO skbs | |
| CVE-2024-36930 | spi: fix null pointer dereference within spi_sync | |
| CVE-2024-36932 | thermal/debugfs: Prevent use-after-free from occurring after cdev removal | |
| CVE-2024-36931 | s390/cio: Ensure the copied buf is NUL terminated | |
| CVE-2024-36933 | nsh: Restore skb->{protocol,data,mac_header} for outer header in nsh_gso_segment(). | |
| CVE-2024-36934 | bna: ensure the copied buf is NUL terminated | |
| CVE-2024-36935 | ice: ensure the copied buf is NUL terminated |
Showing top 20 of 93 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-43502
net/rds: handle zerocopy send cleanup before the message is - CVE-2026-43501
ipv6: rpl: reserve mac_len headroom when recompressed SRH gr - CVE-2026-43498
accel/ivpu: Disallow re-exporting imported GEM objects - CVE-2026-43499
rtmutex: Use waiter::task instead of current in remove_waite - CVE-2026-43497
fbdev: udlfb: add vm_ops to dlfb_ops_mmap to prevent use-aft
Same vendor: Linux
- CVE-2026-43502
net/rds: handle zerocopy send cleanup before the message is - CVE-2026-43501
ipv6: rpl: reserve mac_len headroom when recompressed SRH gr - CVE-2026-43498
accel/ivpu: Disallow re-exporting imported GEM objects - CVE-2026-43499
rtmutex: Use waiter::task instead of current in remove_waite - CVE-2026-43497
fbdev: udlfb: add vm_ops to dlfb_ops_mmap to prevent use-aft
V. Comments for CVE-2024-36889
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