Assessment
- Severity
- Moderate
- CVSS base score
- 4.7
- Impact
- Not stated
- Exploitation detected
- Unknown: not stated by MSRC
- Exploitability
- Not assessed
- Publicly disclosed
- Unknown: not stated by MSRC
- EPSS · 30-day forecast
- No EPSS score collected
- Customer action
- Required: follow the MSRC remediation guidance
More details
- CVSS vector
- CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
- Public detection template
- No Nuclei template is listed in the current collected catalog
- Component
- Mariner
- Weakness
- —
- Issued by
- Linux
- Last revised
- 7 Nov 2026Information published.
CVSS 3.1 base metricsRed raises the risk · green lowers it
- Attack vector
- LocalAV:L
- Attack complexity
- HighAC:H
- Privileges required
- LowPR:L
- User interaction
- NoneUI:N
- Scope
- UnchangedS:U
- Confidentiality
- NoneC:N
- Integrity
- NoneI:N
- Availability
- HighA:H
Updates that fix it
0 KBsNo KB listed
No KB update is listed in the collected MSRC record. Check the MSRC advisory for product releases and other remedies.
Affected products
Open Source Software
1 affected product
- azl3 kernel 6.6.159.1-1 on Azure Linux 3.0
What changed
Detection template: Unknown: detection-template evidence is incomplete or retained → No Nuclei template listed
Detection template: No Nuclei template listed → Unknown: detection-template evidence is incomplete or retained
Page history
Changes are dated when recorded; day views use the last saved version from that UTC day, and citations stay fixed.
Cite this versionField-level log (10)
Up to 100 recent field edits are shown; older edits may be outside retention.
- 7 Nov 2026 · 08:59:22 UTC
Last revised5 Nov 2026 14:54 UTC → 7 Nov 2026 01:45 UTC
- 6 Nov 2026 · 17:32:22 UTC
Public detection templateUnknown: detection-template evidence is incomplete or retained → No Nuclei template listed
- 6 Nov 2026 · 17:32:22 UTC
Source coverage: public-exploit-codeIncomplete → Current
- 6 Nov 2026 · 17:32:22 UTC
Source coverage: first-epssIncomplete → Current
- 6 Nov 2026 · 17:32:22 UTC
Source coverage: msrc-cvrfIncomplete → Current
- 6 Nov 2026 · 16:31:02 UTC
Public detection templateNo Nuclei template listed → Unknown: detection-template evidence is incomplete or retained
- 6 Nov 2026 · 16:31:02 UTC
Source coverage: public-exploit-codeCurrent → Incomplete
- 6 Nov 2026 · 16:31:02 UTC
Source coverage: first-epssCurrent → Incomplete
- 6 Nov 2026 · 16:31:02 UTC
Source coverage: msrc-cvrfCurrent → Incomplete
- 6 Nov 2026 · 08:04:49 UTC
Last revised4 Nov 2026 14:46 UTC → 5 Nov 2026 14:54 UTC
Explore global source statements, affected packages and advisory history for CVE-2026-99255. The catalog has a separate collection scope from Microsoft release records.
cve-program · CVE-2026-99255
PublishedLinux
Vendor product
Original vendor version evidence · not evaluated as a NuGet range
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"io_uring/io-wq.c",
"io_uring/io_uring.c",
"io_uring/io_uring.h"
],
"versions": [
{
"version": "768134d4f48109b90f4248feecbeeb7d684e410c",
"lessThan": "98470f164286f7f62aaee519d4d11b9370ce6d7b",
"status": "affected",
"versionType": "git"
},
{
"version": "768134d4f48109b90f4248feecbeeb7d684e410c",
"lessThan": "d39ebc7a583d650b1d6da9b45e2ce96ad4d877e4",
"status": "affected",
"versionType": "git"
},
{
"version": "768134d4f48109b90f4248feecbeeb7d684e410c",
"lessThan": "ebe8e97fb99d9f374c482902a00677cfd24a6c27",
"status": "affected",
"versionType": "git"
},
{
"version": "768134d4f48109b90f4248feecbeeb7d684e410c",
"lessThan": "3e02b8df0e9fa1423ac2a4e03409a9329c30ac49",
"status": "affected",
"versionType": "git"
},
{
"version": "768134d4f48109b90f4248feecbeeb7d684e410c",
"lessThan": "92e20e9c72bdf6cfa6f84eded7b33399bc7061da",
"status": "affected",
"versionType": "git"
},
{
"version": "768134d4f48109b90f4248feecbeeb7d684e410c",
"lessThan": "59e45f44c3cea9f4b2d099171c3cec1d25c5b638",
"status": "affected",
"versionType": "git"
},
{
"version": "768134d4f48109b90f4248feecbeeb7d684e410c",
"lessThan": "436d48a2ed13112d2d27085325838e5bce6b4507",
"status": "affected",
"versionType": "git"
}
]
}Linux
Vendor product
Original vendor version evidence · not evaluated as a NuGet range
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "affected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"io_uring/io-wq.c",
"io_uring/io_uring.c",
"io_uring/io_uring.h"
],
"versions": [
{
"version": "5.5",
"status": "affected"
},
{
"version": "0",
"lessThan": "5.5",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.1.191",
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.6.161",
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.12.115",
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.18.60",
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "7.2.14",
"lessThanOrEqual": "7.2.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "7.3.2",
"lessThanOrEqual": "7.3.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "7.4-rc1",
"lessThanOrEqual": "*",
"status": "unaffected",
"versionType": "original_commit_for_fix"
}
]
}Original source record · Cite this exact observation · Complete original publisher JSON