CVE-2026-72102 (GCVE-0-2026-72102)
Vulnerability from cvelistv5
Published
2026-08-15 05:52
Modified
2026-08-17 05:40
Severity ?
VLAI Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
dm_early_create: fix freeing used table on dm_resume failure
If dm_resume fails, the kernel attempts to free table with
dm_table_destroy, but the table was already instantiated with
dm_swap_table. This commit skips the call to dm_table_destroy in this
case.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Version: 6bbc923dfcf57d6b97388819a7393835664c7a8e Version: 6bbc923dfcf57d6b97388819a7393835664c7a8e Version: 6bbc923dfcf57d6b97388819a7393835664c7a8e Version: 6bbc923dfcf57d6b97388819a7393835664c7a8e Version: 6bbc923dfcf57d6b97388819a7393835664c7a8e Version: 6bbc923dfcf57d6b97388819a7393835664c7a8e Version: 6bbc923dfcf57d6b97388819a7393835664c7a8e Version: 6bbc923dfcf57d6b97388819a7393835664c7a8e |
||
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/md/dm-ioctl.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
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{
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"programFiles": [
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],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "5.1"
},
{
"lessThan": "5.1",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.261",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.212",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.178",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.145",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.97",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.40",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"version": "7.1.5",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.10.261",
"versionStartIncluding": "5.1",
"vulnerable": true
},
{
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"vulnerable": true
},
{
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},
{
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{
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{
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"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndm_early_create: fix freeing used table on dm_resume failure\n\nIf dm_resume fails, the kernel attempts to free table with\ndm_table_destroy, but the table was already instantiated with\ndm_swap_table. This commit skips the call to dm_table_destroy in this\ncase."
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 7.8,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"scenarios": [
{
"lang": "en",
"value": "AV:L - The bug is only reachable via the dm-mod.create kernel boot parameter processed in late_initcall dm_init_init() calling dm_early_create(); there is no network, adjacent, ioctl, netlink, or post-boot userspace path into this __init-only device-mapper setup code.\nAC:L - Once dm_swap_table() installs the table, an attacker controlling dm-mod.create can deterministically force dm_resume() to fail (e.g., paired snapshot-origin preresume handover rejection or verity/crypt preresume errors) without races or attacker-uncontrolled memory layout.\nPR:L - dm_early_create() performs no capability or credential checks on its error path; unlike runtime DM_DEV_CREATE ioctls that require CAP_SYS_ADMIN, triggering the post-swap dm_resume failure only needs crafting dm-mod.create table parameters at boot, not real-root dm-ioctl privileges unobtainable via user namespaces.\nUI:N - The vulnerable teardown runs automatically during late_initcall once dm-mod.create is present and dm_resume fails; no victim must open files, mount filesystems, or take any interactive action beyond rebooting with the crafted boot configuration.\nS:U - The use-after-free and double-free corrupt kernel heap memory during device-mapper early boot setup within the kernel trust boundary; it does not cross VM, container, or IOMMU isolation boundaries into another security authority.\nC:H - dm_table_destroy() frees a dm_table still referenced through md-\u003emap after dm_swap_table(), creating a kernel heap use-after-free that can expose freed object contents and adjacent kernel memory to subsequent allocations and readers.\nI:H - UAF on the live dm_table enables heap grooming and corrupts destructor paths invoked during erroneous teardown (dm_table_destroy target dtr hooks, then dm_destroy __unbind), providing memory corruption primitives developable into arbitrary kernel writes or control-flow hijack.\nA:H - Freeing the active table then calling dm_destroy()/__unbind() on the same object causes double-free/use-after-free during boot cleanup, readily producing kernel panics, oopses, or unbootable systems on dm-mod.create rootfs platforms (Android/ChromeOS/embedded)."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-17T05:40:16.779Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/3ba377a47a093cc19647ca7f102acd33a211d472"
},
{
"url": "https://git.kernel.org/stable/c/72c3283a2abd60ecef295e02270f22ef1dfccd25"
},
{
"url": "https://git.kernel.org/stable/c/d6066145347e14db84c35b445e309f095d0d8125"
},
{
"url": "https://git.kernel.org/stable/c/259ce9e3fc3a3f8c4e393a2072b8f34302eb4d5a"
},
{
"url": "https://git.kernel.org/stable/c/5f6500d44a912d4aed664600966706d76b81d9af"
},
{
"url": "https://git.kernel.org/stable/c/92e3c93d60be1f2425738cd66dbadac7d6bc0cd1"
},
{
"url": "https://git.kernel.org/stable/c/7d8ed7cb844df21e4d93af11250fb3a5cb861147"
},
{
"url": "https://git.kernel.org/stable/c/366665416f20527ff7cad548a32d1ddf23195740"
}
],
"title": "dm_early_create: fix freeing used table on dm_resume failure",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-72102",
"datePublished": "2026-08-15T05:52:46.200Z",
"dateReserved": "2026-08-09T03:40:39.905Z",
"dateUpdated": "2026-08-17T05:40:16.779Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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