CVE-2026-68165
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: mm/damon/core: validate ranges in damon_set_regions() DAMON core logic assumes zero length regions don't exist. However, a few DAMON API callers including DAMON_SYSFS, DAMON_RECLAIM and DAMON_LRU_SORT allow users to set empty monitoring target regions. This could result in WARN_ONCE() on CONFIG_DAMON_DEBUG_SANITY enabled kernel, and divide-by-zero from damon_merge_two_regions(). For example, the WANR_ONCE() can be triggered like below. # grep DAMON_DEBUG_SANITY /boot/config-$(uname -r) # CONFIG_DAMON_DEBUG_SANITY=y # damo start # cd /sys/kernel/mm/damon/admin/kdamonds/0 # echo 0 > contexts/0/targets/0/regions/0/start # echo 0 > contexts/0/targets/0/regions/0/end # echo commit > state # dmesg [....] [ 73.705780] ------------[ cut here ]------------ [ 73.707552] start 0 >= end 0 [ 73.708452] WARNING: mm/damon/core.c:359 at damon_new_region+0x6e/0x80, CPU#1: kdamond.0/758 [...] All DAMON API callers eventually use damon_set_regions() to setup the regions. Add the validation logic in the function.
Severity
Not scored
CVSS score
Not available
Vulnerability status
Received
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-08-10 13:20:02.973000
Last modified
2026-11-06 17:19:20.253000
View original CVE JSON
{
"id": "CVE-2026-68165",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-08-10T13:20:02.973",
"lastModified": "2026-11-06T17:19:20.253",
"vulnStatus": "Received",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/damon/core: validate ranges in damon_set_regions()\n\nDAMON core logic assumes zero length regions don't exist. However, a few\nDAMON API callers including DAMON_SYSFS, DAMON_RECLAIM and DAMON_LRU_SORT\nallow users to set empty monitoring target regions. This could result in\nWARN_ONCE() on CONFIG_DAMON_DEBUG_SANITY enabled kernel, and\ndivide-by-zero from damon_merge_two_regions().\n\nFor example, the WANR_ONCE() can be triggered like below.\n\n # grep DAMON_DEBUG_SANITY /boot/config-$(uname -r)\n # CONFIG_DAMON_DEBUG_SANITY=y\n # damo start\n # cd /sys/kernel/mm/damon/admin/kdamonds/0\n # echo 0 > contexts/0/targets/0/regions/0/start\n # echo 0 > contexts/0/targets/0/regions/0/end\n # echo commit > state\n # dmesg\n [....]\n [ 73.705780] ------------[ cut here ]------------\n [ 73.707552] start 0 >= end 0\n [ 73.708452] WARNING: mm/damon/core.c:359 at damon_new_region+0x6e/0x80, CPU#1: kdamond.0/758\n [...]\n\nAll DAMON API callers eventually use damon_set_regions() to setup the\nregions. Add the validation logic in the function."
}
],
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
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"defaultStatus": "unaffected",
"programFiles": [
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],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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{
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{
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{
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},
{
"version": "6.12.101",
"lessThanOrEqual": "6.12.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.18.42",
"lessThanOrEqual": "6.18.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.1.6",
"lessThanOrEqual": "7.1.*",
"versionType": "semver",
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},
{
"version": "7.2",
"lessThanOrEqual": "*",
"versionType": "original_commit_for_fix",
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}
]
}
]
}
],
"metrics": {
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"timestamp": "2026-11-06T16:43:25.650452Z",
"id": "CVE-2026-68165",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
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],
"role": "CISA Coordinator",
"version": "2.0.3"
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}