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vuln-cve/data/2023/53xxx/CVE-2023-53616.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2023-53616",
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"state": "PUBLISHED",
"assignerShortName": "Linux",
"dateReserved": "2025-10-04T15:40:38.481Z",
"datePublished": "2025-10-04T15:44:23.056Z",
"dateUpdated": "2026-08-05T09:15:09.391Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux",
"dateUpdated": "2026-08-05T09:15:09.391Z"
},
"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": [
{
"cvssV3_1": {
"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"
},
"scenarios": [
{
"lang": "en",
"value": "AV:L - The bug is reached through the mount/remount syscall path on a locally attached JFS volume (loop device, removable media, or a container/appliance image), with no network component.\nAC:L - The attacker controls both the on-disk image and the remount operation, and can make `diMount()`'s `read_metapage()` fail deterministically (e.g. truncating the loop-backing file after mount) — no race and no uncontrollable memory-layout precondition.\nPR:L - Reaching the path needs mount/remount authority over the superblock rather than arbitrary root capability, and in practice this is delegated to low-privileged actors via removable-media automount, loop-mounted user images, and container/appliance mount helpers.\nUI:N - The same actor supplies the image, mounts it, performs the failing ro→rw remount, and triggers the second free at unmount; no separate victim action is required.\nS:U - The corruption stays within the kernel's own security authority — there is no VM, IOMMU, or sandbox boundary crossed.\nC:H - The dangling `i_imap` yields a live use-after-free on a kmalloc-8k object that the attacker can reclaim via heap spray, and `diSync()` writes the freed object's contents back to the on-disk imap page, disclosing reclaimed kernel heap memory the attacker can read directly off the block device.\nI:H - A double free of a large SLUB object gives freelist corruption and type confusion (two live allocations aliasing one object), and the still-mounted read-write filesystem writes attacker-influenced counters and mutex state into the freed memory — an arbitrary-write primitive suitable for control-flow hijack.\nA:H - The immediate observed effect is a KASAN-reported invalid free leading to slab freelist corruption and kernel oops/panic, reproducible on demand."
}
]
}
],
"affected": [
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"fs/jfs/jfs_imap.c"
],
"versions": [
{
"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
"lessThan": "c3c0f0ddd851b3fa3e9d3450bbcd561f4f850469",
"status": "affected",
"versionType": "git"
},
{
"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
"lessThan": "114ea3cb13ab25f7178cb60283adb93d2f96dad7",
"status": "affected",
"versionType": "git"
},
{
"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
"lessThan": "5873df0195124be2f357de11bfd473ead4f90ed8",
"status": "affected",
"versionType": "git"
},
{
"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
"lessThan": "756747d4b439e3e1159282ae89f17eefebbe9b25",
"status": "affected",
"versionType": "git"
},
{
"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
"lessThan": "ef7311101ca43dd73b45bca7a30ac72d9535ff87",
"status": "affected",
"versionType": "git"
},
{
"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
"lessThan": "4de3a603010e0ca334487de24c6aab0777b7f808",
"status": "affected",
"versionType": "git"
},
{
"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
"lessThan": "88484bde6f12126616b38e43b6c00edcd941f615",
"status": "affected",
"versionType": "git"
},
{
"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
"lessThan": "6e2bda2c192d0244b5a78b787ef20aa10cb319b7",
"status": "affected",
"versionType": "git"
}
]
},
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "affected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"fs/jfs/jfs_imap.c"
],
"versions": [
{
"version": "2.6.12",
"status": "affected"
},
{
"version": "0",
"lessThan": "2.6.12",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "4.14.326",
"lessThanOrEqual": "4.14.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "4.19.295",
"lessThanOrEqual": "4.19.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.4.257",
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.10.197",
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.15.133",
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.1.55",
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.5.5",
"lessThanOrEqual": "6.5.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.6",
"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": "2.6.12",
"versionEndExcluding": "4.14.326"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.12",
"versionEndExcluding": "4.19.295"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.12",
"versionEndExcluding": "5.4.257"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.12",
"versionEndExcluding": "5.10.197"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.12",
"versionEndExcluding": "5.15.133"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.12",
"versionEndExcluding": "6.1.55"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.12",
"versionEndExcluding": "6.5.5"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.12",
"versionEndExcluding": "6.6"
}
]
}
]
}
],
"references": [
{
"url": "https://git.kernel.org/stable/c/c3c0f0ddd851b3fa3e9d3450bbcd561f4f850469"
},
{
"url": "https://git.kernel.org/stable/c/114ea3cb13ab25f7178cb60283adb93d2f96dad7"
},
{
"url": "https://git.kernel.org/stable/c/5873df0195124be2f357de11bfd473ead4f90ed8"
},
{
"url": "https://git.kernel.org/stable/c/756747d4b439e3e1159282ae89f17eefebbe9b25"
},
{
"url": "https://git.kernel.org/stable/c/ef7311101ca43dd73b45bca7a30ac72d9535ff87"
},
{
"url": "https://git.kernel.org/stable/c/4de3a603010e0ca334487de24c6aab0777b7f808"
},
{
"url": "https://git.kernel.org/stable/c/88484bde6f12126616b38e43b6c00edcd941f615"
},
{
"url": "https://git.kernel.org/stable/c/6e2bda2c192d0244b5a78b787ef20aa10cb319b7"
}
],
"title": "jfs: fix invalid free of JFS_IP(ipimap)->i_imap in diUnmount",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
}
}