Skip to content
Noroxi
NVD / CVE Program· CNA Linux

CVE-2026-22984: libceph: prevent potential out-of-bounds reads in handle_auth_done()

Noroxi assessment

Priority: Monitor (action score 28/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.40% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • According to CISA the attack is automatable: targets can be found by mass scanning.
  • Fixed version: Linux Linux 194cfe2af4d2a1de599d39dad636b47c2f6c2c96, 2802ef3380fa8c4a08cda51ec1f085b1a712e9e2, 2d653bb63d598ae4b096dd678744bdcc34ee89e8; cbl2 kernel 5.15.186.1-1 on CBL Mariner 2.0 5.15.200.1-1.
  • Severity is disputed: the assigning authority (CNA) scores it 9.8, NVD 7.1.

Low priority for now. Upgrade to Linux Linux 194cfe2af4d2a1de599d39dad636b47c2f6c2c96, 2802ef3380fa8c4a08cda51ec1f085b1a712e9e2, 2d653bb63d598ae4b096dd678744bdcc34ee89e8; cbl2 kernel 5.15.186.1-1 on CBL Mariner 2.0 5.15.200.1-1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: libceph: prevent potential out-of-bounds reads in handle_auth_done() Perform an explicit bounds check on payload_len to avoid a possible out-of-bounds access in the callout. [ idryomov: changelog ]

HighCVSS 7.1 · v3.1—No exploit Fix available
Published
Jan 23, 2026
Updated
Oct 19, 2026
EPSS
0.4% · 34th percentile

Report tools

JSON

Action score

28

Monitor

Low priority for now.

CVSS
28 / 40 · 7.1 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.4%

CISA SSVC decision

Exploitation
none
Automatable
yes
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
7.1
CNA · Linux
9.8
2.7 point gap

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-22984

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

One daily email digest (06:00 UTC); connect a webhook for KEV listings and weaponized exploits instantly.

Your free account also gets you

Running WordPress? Scan your site free with WP Lens

  • Stack alerts: add the products and versions you run, get the new CVEs that affect them
  • Uptime monitoring: 1 site, instant email when it goes down
  • Add your domain: subdomains and takeover risk scanned every week (1 domain)
  • 10 scans an hour on the security tools (3 a day without an account), an API key and MCP
  • All your scans in one panel: findings, what changed in the last scan, a report per domain or per client (PDF, share link)
All free tools

Sign up with email · Have an account? Sign in

Free account, no card. Unfollow any time.

Don't want an account? Get "Exploited this week" by email every MondayDon't want an account? RSS feed for linux records

Running WordPress? Scan your site free with WP Lens

Is your version affected? Check it

Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

We use this product, ask for help

Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
linuxlinux kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernel5.11 and later · before 5.15.198
  • linux linux kernel5.16 and later · before 6.1.161
  • linux linux kernel6.2 and later · before 6.6.121
  • linux linux kernel6.7 and later · before 6.12.66
  • linux linux kernel6.13 and later · before 6.18.6
  • linux linux kernel6.19

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 5.11affected
    • cd1a677cad994021b19665ed476aea63f5d54f31 and later · before 194cfe2af4d2a1de599d39dad636b47c2f6c2c96affected · git
    • cd1a677cad994021b19665ed476aea63f5d54f31 and later · before 79fe3511db416d2f2edcfd93569807cb02736e5eaffected · git
    • cd1a677cad994021b19665ed476aea63f5d54f31 and later · before ef208ea331ef688729f64089b895ed1b49e842e3affected · git
    • cd1a677cad994021b19665ed476aea63f5d54f31 and later · before 2802ef3380fa8c4a08cda51ec1f085b1a712e9e2affected · git
    • cd1a677cad994021b19665ed476aea63f5d54f31 and later · before 2d653bb63d598ae4b096dd678744bdcc34ee89e8affected · git
    • cd1a677cad994021b19665ed476aea63f5d54f31 and later · before 818156caffbf55cb4d368f9c3cac64e458fb49c9affected · git
    • before 5.11not affected · semver
    • 5.15.198 and later · up to and including 5.15.*not affected · semver
    • 6.1.161 and later · up to and including 6.1.*not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
AlmaLinux:10kernelbefore 6.12.0-211.60.1.el10_26.12.0-211.60.1.el10_2
AlmaLinux:10kernel-64kbefore 6.12.0-211.60.1.el10_26.12.0-211.60.1.el10_2
AlmaLinux:10kernel-64k-corebefore 6.12.0-211.60.1.el10_26.12.0-211.60.1.el10_2
AlmaLinux:10kernel-64k-debugbefore 6.12.0-211.60.1.el10_26.12.0-211.60.1.el10_2
AlmaLinux:10kernel-64k-debug-corebefore 6.12.0-211.60.1.el10_26.12.0-211.60.1.el10_2
AlmaLinux:10kernel-64k-debug-develbefore 6.12.0-211.60.1.el10_26.12.0-211.60.1.el10_2
AlmaLinux:10kernel-64k-debug-devel-matchedbefore 6.12.0-211.60.1.el10_26.12.0-211.60.1.el10_2
AlmaLinux:10kernel-64k-debug-modulesbefore 6.12.0-211.60.1.el10_26.12.0-211.60.1.el10_2
AlmaLinux:10kernel-64k-debug-modules-corebefore 6.12.0-211.60.1.el10_26.12.0-211.60.1.el10_2
AlmaLinux:10kernel-64k-debug-modules-extrabefore 6.12.0-211.60.1.el10_26.12.0-211.60.1.el10_2
AlmaLinux:10kernel-64k-develbefore 6.12.0-211.60.1.el10_26.12.0-211.60.1.el10_2
AlmaLinux:10kernel-64k-devel-matchedbefore 6.12.0-211.60.1.el10_26.12.0-211.60.1.el10_2
AlmaLinux:10kernel-64k-modulesbefore 6.12.0-211.60.1.el10_26.12.0-211.60.1.el10_2
AlmaLinux:10kernel-64k-modules-corebefore 6.12.0-211.60.1.el10_26.12.0-211.60.1.el10_2
AlmaLinux:10kernel-64k-modules-extrabefore 6.12.0-211.60.1.el10_26.12.0-211.60.1.el10_2
AlmaLinux:10kernel-abi-stablelistsbefore 6.12.0-211.60.1.el10_26.12.0-211.60.1.el10_2
AlmaLinux:10kernel-corebefore 6.12.0-211.60.1.el10_26.12.0-211.60.1.el10_2
AlmaLinux:10kernel-cross-headersbefore 6.12.0-211.60.1.el10_26.12.0-211.60.1.el10_2
AlmaLinux:10kernel-debugbefore 6.12.0-211.60.1.el10_26.12.0-211.60.1.el10_2
AlmaLinux:10kernel-debug-corebefore 6.12.0-211.60.1.el10_26.12.0-211.60.1.el10_2
AlmaLinux:10kernel-debug-develbefore 6.12.0-211.60.1.el10_26.12.0-211.60.1.el10_2
AlmaLinux:10kernel-debug-devel-matchedbefore 6.12.0-211.60.1.el10_26.12.0-211.60.1.el10_2
AlmaLinux:10kernel-debug-modulesbefore 6.12.0-211.60.1.el10_26.12.0-211.60.1.el10_2
AlmaLinux:10kernel-debug-modules-corebefore 6.12.0-211.60.1.el10_26.12.0-211.60.1.el10_2

+96

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now

Published before and after this one in the same product

  • ← EarlierCVE-2026-22980Jan 23, 2026 · nfsd: provide locking for v4_end_grace
    31Monitor
  • ← EarlierCVE-2026-22982Jan 23, 2026 · net: mscc: ocelot: Fix crash when adding interface under a lag
    22Monitor
  • Later →CVE-2026-22990Jan 23, 2026 · libceph: replace overzealous BUG_ON in osdmap_apply_incremental()
    22Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux194cfe2af4d2a1de599d39dad636b47c2f6c2c96Vendor (CNA)
Linux Linux2802ef3380fa8c4a08cda51ec1f085b1a712e9e2Vendor (CNA)
Linux Linux2d653bb63d598ae4b096dd678744bdcc34ee89e8Vendor (CNA)
Linux Linux79fe3511db416d2f2edcfd93569807cb02736e5eVendor (CNA)
Linux Linux818156caffbf55cb4d368f9c3cac64e458fb49c9Vendor (CNA)
Linux Linuxef208ea331ef688729f64089b895ed1b49e842e3Vendor (CNA)
cbl2 kernel 5.15.186.1-1 on CBL Mariner 2.05.15.200.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
almalinux:kernel5.14.0-687.10.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k5.14.0-687.10.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-core5.14.0-687.10.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug5.14.0-687.10.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-core5.14.0-687.10.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-devel5.14.0-687.10.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-devel-matched5.14.0-687.10.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-modules5.14.0-687.10.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-modules-core5.14.0-687.10.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-modules-extra5.14.0-687.10.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-devel5.14.0-687.10.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-devel-matched5.14.0-687.10.1.el9_8 · AlmaLinux:9Package registry (OSV)
debian:linux6.1.162-1 · Debian:12Package registry (OSV)
red hat:kernel-64k-debug-debuginfo0:5.14.0-687.10.1.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-debug-devel0:5.14.0-687.10.1.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-debug-devel-matched0:5.14.0-687.10.1.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-debuginfo0:5.14.0-687.10.1.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-devel0:5.14.0-687.10.1.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-devel-matched0:5.14.0-687.10.1.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-debug-debuginfo0:5.14.0-687.10.1.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-debug-devel0:5.14.0-687.10.1.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-debug-devel-matched0:5.14.0-687.10.1.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-debuginfo0:5.14.0-687.10.1.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)

+4

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-125 · Out-of-bounds Read

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (5 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records