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NVD / CVE Program· CNA Linux

CVE-2026-68158: libceph: Fix multiplication overflow in decode_new_up_state_weight()

Noroxi assessment

Priority: Monitor (action score 39/100)

  • 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: 0.71% (FIRST EPSS); higher than 53.8% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. 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 05c90e059269f087becfcce23348496085835c29, 143ba49ead77ec483c0326f8aaad8649874e99c4, 1732d89dfcd74f6fde9ce70900d316c4a151c153; azl3 kernel 6.6.143.1-1 on Azure Linux 3.0 6.6.150.1-1.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 05c90e059269f087becfcce23348496085835c29, 143ba49ead77ec483c0326f8aaad8649874e99c4, 1732d89dfcd74f6fde9ce70900d316c4a151c153; azl3 kernel 6.6.143.1-1 on Azure Linux 3.0 6.6.150.1-1 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: Fix multiplication overflow in decode_new_up_state_weight() If a message of type CEPH_MSG_OSD_MAP contains a (maliciously) corrupted osdmap, out-of-bounds memory accesses may occur in decode_new_up_state_weight(). This happens because the bounds check for the new_state part is based on calculating its length depending on a len value read from the incoming message. This calculation may overflow leading to an incorrect bounds check. Subsequently, out-of-bounds reads may occur when decoding this part. This patch switches the multiplication to use check_mul_overflow() to abort processing the osdmap if an overflow occurred. Therefore, osdmaps/messages containing large values for len that result in a multiplication overflow are treated as invalid. [ idryomov: rename new_state_len -> new_state_item_size, formatting ]

CriticalCVSS 9.8 · v3.1—No exploit Fix available
Published
Aug 10, 2026
Updated
Oct 19, 2026
EPSS
0.7% · 53th percentile

Report tools

JSON

Action score

39

Monitor

Low priority for now.

CVSS
39 / 40 · 9.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.7%

CISA SSVC decision

Exploitation
none
Automatable
yes
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · Linux
9.8
NVD has not scored this yet; the score shown is the CNA’s.

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

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  • when EPSS rises 20 points in a week

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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.

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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.

—

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

    • 1196c36fd53c3b1615eb02f986cb727b1dfc1047, bbc3aa6b0e6050b2b2e04a08dd4d6423d576b196, 6b96b2d473701b45df3fea8dd9796b6ec39e6d54, 7405d73cea0d0e6c541f5c534078feeb46188844, 8777c9f654637d56f4c4ca54eb1bc7c609b70085, 6831c98ce0b8a3e88db64aa224372effd0dcc694, 032951d32c13b7564dfba82758260cb7aa1149d2, 14877928f10667a5606383885d004f7185f33718, 4.7affected
    • 930c532869774ebf8af9efe9484c597f896a7d46 and later · before 2ceee3b77b83052648c40fef965f836fd7699d26affected · git
    • 930c532869774ebf8af9efe9484c597f896a7d46 and later · before e4473751cc37db41f3f7da25d64a23e0c74570f1affected · git
    • 930c532869774ebf8af9efe9484c597f896a7d46 and later · before f6961070c326bd158c38fa48756cde2bd78c4aaaaffected · git
    • 930c532869774ebf8af9efe9484c597f896a7d46 and later · before 05c90e059269f087becfcce23348496085835c29affected · git
    • 930c532869774ebf8af9efe9484c597f896a7d46 and later · before 143ba49ead77ec483c0326f8aaad8649874e99c4affected · git
    • 930c532869774ebf8af9efe9484c597f896a7d46 and later · before 1732d89dfcd74f6fde9ce70900d316c4a151c153affected · git
    • 930c532869774ebf8af9efe9484c597f896a7d46 and later · before bee4b5b53e7bff0467fd916cc44c9b190733c6bdaffected · git
    • 930c532869774ebf8af9efe9484c597f896a7d46 and later · before 98917a499ec7064c14fc56d180a4fd636fc2784caffected · git
    • 3.10.103 and later · before 3.11affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.187-16.1.187-1
Debian:12linux-6.12before 6.12.101-1~deb12u16.12.101-1~deb12u1
Debian:13linuxbefore 6.12.101-16.12.101-1
Debian:14linuxbefore 7.1.6-17.1.6-1
SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOSkernel-64kbbefore 5.14.21-150500.55.192.25.14.21-150500.55.192.2
SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOSkernel-docsbefore 5.14.21-150500.55.192.15.14.21-150500.55.192.1
SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOSkernel-obs-buildbefore 5.14.21-150500.55.192.25.14.21-150500.55.192.2
SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOSkernel-symsbefore 5.14.21-150500.55.192.15.14.21-150500.55.192.1
SUSE:Linux Enterprise Live Patching 12 SP5kgraft-patch-SLE12-SP5_Update_73before 17-2.117-2.1
SUSE:Linux Enterprise Live Patching 12 SP5kgraft-patch-SLE12-SP5_Update_74before 15-2.115-2.1
SUSE:Linux Enterprise Live Patching 12 SP5kgraft-patch-SLE12-SP5_Update_83before 8-2.18-2.1
SUSE:Linux Enterprise Live Patching 12 SP5kgraft-patch-SLE12-SP5_Update_86before 4-2.14-2.1
SUSE:Linux Enterprise Live Patching 15 SP4kernel-livepatch-SLE15-SP4_Update_44before 21-150400.2.121-150400.2.1
SUSE:Linux Enterprise Live Patching 15 SP4kernel-livepatch-SLE15-SP4_Update_56before 7-150400.2.17-150400.2.1
SUSE:Linux Enterprise Live Patching 15 SP4kernel-livepatch-SLE15-SP4_Update_58before 4-150400.2.14-150400.2.1
SUSE:Linux Enterprise Live Patching 15 SP5kernel-livepatch-SLE15-SP5_Update_30before 20-150500.2.120-150500.2.1
SUSE:Linux Enterprise Live Patching 15 SP5kernel-livepatch-SLE15-SP5_Update_33before 15-150500.2.115-150500.2.1
SUSE:Linux Enterprise Live Patching 15 SP5kernel-livepatch-SLE15-SP5_Update_34before 15-150500.2.115-150500.2.1
SUSE:Linux Enterprise Live Patching 15 SP5kernel-livepatch-SLE15-SP5_Update_36before 11-150500.2.111-150500.2.1
SUSE:Linux Enterprise Live Patching 15 SP5kernel-livepatch-SLE15-SP5_Update_37before 11-150500.2.111-150500.2.1
SUSE:Linux Enterprise Live Patching 15 SP5kernel-livepatch-SLE15-SP5_Update_39before 9-150500.2.19-150500.2.1
SUSE:Linux Enterprise Live Patching 15 SP5kernel-livepatch-SLE15-SP5_Update_44before 4-150500.2.14-150500.2.1
SUSE:Linux Enterprise Live Patching 15 SP5kernel-livepatch-SLE15-SP5_Update_46before 1-150500.11.3.21-150500.11.3.2
SUSE:Linux Enterprise Live Patching 15 SP6kernel-livepatch-SLE15-SP6_Update_30before 4-150600.2.14-150600.2.1

+74

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-68156Aug 10, 2026 · libceph: refresh auth->authorizer_buf{,_len} after authorizer update
    39Monitor
  • ← EarlierCVE-2026-68157Aug 10, 2026 · libceph: guard missing CRUSH type name lookup
    30Monitor
  • Later →CVE-2026-68159Aug 10, 2026 · libceph: bound pg_{temp,upmap,upmap_items} length to CEPH_PG_MAX_SIZE
    39Monitor

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 Linux05c90e059269f087becfcce23348496085835c29Vendor (CNA)
Linux Linux143ba49ead77ec483c0326f8aaad8649874e99c4Vendor (CNA)
Linux Linux1732d89dfcd74f6fde9ce70900d316c4a151c153Vendor (CNA)
Linux Linux2ceee3b77b83052648c40fef965f836fd7699d26Vendor (CNA)
Linux Linux3.11Vendor (CNA)
Linux Linux3.13Vendor (CNA)
Linux Linux3.15Vendor (CNA)
Linux Linux3.17Vendor (CNA)
Linux Linux3.19Vendor (CNA)
Linux Linux4.2Vendor (CNA)
Linux Linux4.5Vendor (CNA)
Linux Linux4.7Vendor (CNA)
Linux Linux98917a499ec7064c14fc56d180a4fd636fc2784cVendor (CNA)
Linux Linuxbee4b5b53e7bff0467fd916cc44c9b190733c6bdVendor (CNA)
Linux Linuxe4473751cc37db41f3f7da25d64a23e0c74570f1Vendor (CNA)
Linux Linuxf6961070c326bd158c38fa48756cde2bd78c4aaaVendor (CNA)
azl3 kernel 6.6.143.1-1 on Azure Linux 3.06.6.150.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
debian:linux6.1.187-1 · Debian:12Package registry (OSV)
debian:linux-6.126.12.101-1~deb12u1 · Debian:12Package registry (OSV)
suse:kernel-64kb5.14.21-150500.55.192.2 · SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOSPackage registry (OSV)
suse:kernel-default5.14.21-150500.55.192.2 · SUSE:Linux Enterprise Micro 5.5Package registry (OSV)
suse:kernel-default-base5.14.21-150500.55.192.2.150500.6.89.2 · SUSE:Linux Enterprise Micro 5.5Package registry (OSV)
suse:kernel-docs5.14.21-150500.55.192.1 · SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOSPackage registry (OSV)
suse:kernel-livepatch-MICRO-6-0_Update_1218-1.1 · SUSE:Linux Micro 6.1Package registry (OSV)
suse:kernel-livepatch-MICRO-6-0_Update_1316-1.1 · SUSE:Linux Micro 6.1Package registry (OSV)
suse:kernel-livepatch-MICRO-6-0_Update_1414-1.2 · SUSE:Linux Micro 6.1Package registry (OSV)
suse:kernel-livepatch-MICRO-6-0_Update_1613-1.1 · SUSE:Linux Micro 6.1Package registry (OSV)
suse:kernel-livepatch-MICRO-6-0_Update_1712-1.1 · SUSE:Linux Micro 6.1Package registry (OSV)
suse:kernel-livepatch-MICRO-6-0_Update_1811-1.1 · SUSE:Linux Micro 6.1Package registry (OSV)
suse:kernel-livepatch-MICRO-6-0_Update_199-1.1 · SUSE:Linux Micro 6.1Package registry (OSV)

+13

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+1% in 7 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.

  • CVE-2026-720145 days apartdrbd: reject data replies with an out-of-range payload size
    39Monitor
  • CVE-2026-6398422 days apartipv6: rpl: fix hdrlen overflow in ipv6_rpl_srh_decompress()
    39Monitor
  • CVE-2025-68794209 days apartiomap: adjust read range correctly for non-block-aligned positions
    39Monitor
  • CVE-2026-681080 days apartdrm/amdgpu/vce: fix integer overflow in image size
    35Monitor
  • CVE-2026-681250 days apartmac802154: llsec: reject frames shorter than the authentication tag
    35Monitor
  • CVE-2026-645984 days apartsmb/client: Fix error code in smb2_aead_req_alloc()
    35Monitor

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).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

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

Weakness class (CWE)

CWE-190 · Integer Overflow or Wraparound

CVSS vector

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

nvd-secondary

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. SSVC exploitation— → none
  2. Fix✗ → ✓

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

References

Show all references (7 more)

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

All records