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NVD / CVE Program· CNA Linux

CVE-2026-23201: ceph: fix oops due to invalid pointer for kfree() in parse_longname()

Noroxi assessment

Priority: Monitor (action score 22/100)

  • 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: 0.13% (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.
  • Fixed version: Linux Linux 6.12.70, 6.16, 6.17.

Low priority for now. Upgrade to Linux Linux 6.12.70, 6.16, 6.17 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: ceph: fix oops due to invalid pointer for kfree() in parse_longname() This fixes a kernel oops when reading ceph snapshot directories (.snap), for example by simply running `ls /mnt/my_ceph/.snap`. The variable str is guarded by __free(kfree), but advanced by one for skipping the initial '_' in snapshot names. Thus, kfree() is called with an invalid pointer. This patch removes the need for advancing the pointer so kfree() is called with correct memory pointer. Steps to reproduce: 1. Create snapshots on a cephfs volume (I've 63 snaps in my testcase) 2. Add cephfs mount to fstab $ echo "samba-fileserver@.files=/volumes/datapool/stuff/3461082b-ecc9-4e82-8549-3fd2590d3fb6 /mnt/test/stuff ceph acl,noatime,_netdev 0 0" >> /etc/fstab 3. Reboot the system $ systemctl reboot 4. Check if it's really mounted $ mount | grep stuff 5. List snapshots (expected 63 snapshots on my system) $ ls /mnt/test/stuff/.snap Now ls hangs forever and the kernel log shows the oops.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Feb 14, 2026
Updated
Sep 14, 2026
EPSS
0.1% · 2th percentile

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

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  • 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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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.

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 kernel6.12.42 and later · before 6.12.70
  • linux linux kernel6.15.10 and later · before 6.16
  • linux linux kernel6.16.1 and later · before 6.18.10
  • 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

    • 3145b2b11492d61c512bbc59660bb823bc757f48, 493479af8af3ab907f49e99323777d498a4fbd2b, 6.17affected
    • 4b9aee707c4580511983a0998547f3b28514e6a6 and later · before c9a129c82ddf82a50b4f8960d2609714ca2dbd26affected · git
    • bb80f7618832d26f7e395f52f82b1dac76223e5f and later · before 8c9af7339de419819cfc641d551675d38ff99abfaffected · git
    • 101841c38346f4ca41dc1802c867da990ffb32eb and later · before e258ed369c9e04caa7d2fd49785d753ae4034cb6affected · git
    • 101841c38346f4ca41dc1802c867da990ffb32eb and later · before bc8dedae022ce3058659c3addef3ec4b41d15e00affected · git
    • 6.12.42 and later · before 6.12.70affected · semver
    • 6.15.10 and later · before 6.16affected · semver
    • 6.16.1 and later · before 6.17affected · semver
    • before 6.17not affected · semver
    • 6.12.70 and later · up to and including 6.12.*not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:13linuxbefore 6.12.73-16.12.73-1
Debian:14linuxbefore 6.18.10-16.18.10-1
openSUSE:Leap 16.0dtb-aarch64before 6.12.0-160000.28.16.12.0-160000.28.1
openSUSE:Leap 16.0kernel-64kbbefore 6.12.0-160000.28.16.12.0-160000.28.1
openSUSE:Leap 16.0kernel-azurebefore 6.12.0-160000.28.16.12.0-160000.28.1
openSUSE:Leap 16.0kernel-defaultbefore 6.12.0-160000.28.16.12.0-160000.28.1
openSUSE:Leap 16.0kernel-default-basebefore 6.12.0-160000.27.1.160000.2.86.12.0-160000.27.1.160000.2.8
openSUSE:Leap 16.0kernel-docsbefore 6.12.0-160000.28.16.12.0-160000.28.1
openSUSE:Leap 16.0kernel-kvmsmallbefore 6.12.0-160000.28.16.12.0-160000.28.1
openSUSE:Leap 16.0kernel-obs-buildbefore 6.12.0-160000.28.16.12.0-160000.28.1
openSUSE:Leap 16.0kernel-obs-qabefore 6.12.0-160000.28.16.12.0-160000.28.1
openSUSE:Leap 16.0kernel-rtbefore 6.12.0-160000.28.16.12.0-160000.28.1
openSUSE:Leap 16.0kernel-sourcebefore 6.12.0-160000.28.16.12.0-160000.28.1
openSUSE:Leap 16.0kernel-symsbefore 6.12.0-160000.28.16.12.0-160000.28.1
openSUSE:Leap 16.0kernel-zfcpdumpbefore 6.12.0-160000.28.16.12.0-160000.28.1
SUSE:Linux Enterprise Live Patching 15 SP7kernel-livepatch-SLE15-SP7-RT_Update_11before 1-150700.1.3.11-150700.1.3.1
SUSE:Linux Micro 6.2gdk-pixbufbefore 2.42.12-160000.4.12.42.12-160000.4.1
SUSE:Linux Micro 6.2kernel-64kbbefore 6.12.0-160000.28.16.12.0-160000.28.1
SUSE:Linux Micro 6.2kernel-defaultbefore 6.12.0-160000.28.16.12.0-160000.28.1
SUSE:Linux Micro 6.2kernel-default-basebefore 6.12.0-160000.27.1.160000.2.86.12.0-160000.27.1.160000.2.8
SUSE:Linux Micro 6.2kernel-rtbefore 6.12.0-160000.28.16.12.0-160000.28.1
SUSE:Linux Micro 6.2kernel-sourcebefore 6.12.0-160000.28.16.12.0-160000.28.1
SUSE:Linux Micro Extras 6.2kernel-obs-buildbefore 6.12.0-160000.28.16.12.0-160000.28.1
SUSE:Linux Micro Extras 6.2kernel-symsbefore 6.12.0-160000.28.16.12.0-160000.28.1

+3

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-2026-23199Feb 14, 2026 · procfs: avoid fetching build ID while holding VMA lock
    22Monitor
  • ← EarlierCVE-2026-23200Feb 14, 2026 · ipv6: Fix ECMP sibling count mismatch when clearing RTF_ADDRCONF
    22Monitor
  • Later →CVE-2026-23203Feb 14, 2026 · net: cpsw_new: Execute ndo_set_rx_mode callback in a work queue
    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 Linux6.12.70Vendor (CNA)
Linux Linux6.16Vendor (CNA)
Linux Linux6.17Vendor (CNA)
Linux Linux8c9af7339de419819cfc641d551675d38ff99abfVendor (CNA)
Linux Linuxbc8dedae022ce3058659c3addef3ec4b41d15e00Vendor (CNA)
Linux Linuxc9a129c82ddf82a50b4f8960d2609714ca2dbd26Vendor (CNA)
Linux Linuxe258ed369c9e04caa7d2fd49785d753ae4034cb6Vendor (CNA)
debian:linux6.12.73-1 · Debian:13Package registry (OSV)
opensuse:dtb-aarch646.12.0-160000.28.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-64kb6.12.0-160000.28.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-azure6.12.0-160000.28.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-default6.12.0-160000.28.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-default-base6.12.0-160000.27.1.160000.2.8 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-docs6.12.0-160000.28.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-kvmsmall6.12.0-160000.28.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-obs-build6.12.0-160000.28.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-obs-qa6.12.0-160000.28.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-rt6.12.0-160000.28.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-source6.12.0-160000.28.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-syms6.12.0-160000.28.1 · openSUSE:Leap 16.0Package registry (OSV)
suse:gdk-pixbuf2.42.12-160000.4.1 · SUSE:Linux Micro 6.2Package registry (OSV)
suse:kernel-64kb6.12.0-160000.28.1 · SUSE:Linux Micro 6.2Package registry (OSV)
suse:kernel-default6.12.0-160000.28.1 · SUSE:Linux Micro 6.2Package registry (OSV)
suse:kernel-default-base6.12.0-160000.27.1.160000.2.8 · SUSE:Linux Micro 6.2Package registry (OSV)
suse:kernel-livepatch-SLE15-SP7-RT_Update_111-150700.1.3.1 · SUSE:Linux Enterprise Live Patching 15 SP7Package registry (OSV)
suse:kernel-obs-build6.12.0-160000.28.1 · SUSE:Linux Micro Extras 6.2Package registry (OSV)
suse:kernel-rt6.4.0-150700.7.37.2 · SUSE:Real Time Module 15 SP7Package registry (OSV)
suse:kernel-source6.12.0-160000.28.1 · SUSE:Linux Micro 6.2Package registry (OSV)
suse:kernel-source-rt6.4.0-150700.7.37.2 · SUSE:Real Time Module 15 SP7Package registry (OSV)
suse:kernel-syms6.12.0-160000.28.1 · SUSE:Linux Micro Extras 6.2Package registry (OSV)

+1

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
none
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
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-476 · NULL Pointer Dereference

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/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.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

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

References

Show all references (3 more)

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

All records