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NVD / CVE Program· CNA Linux

CVE-2023-54117: s390/dcssblk: fix kernel crash with list_add corruption

—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 0/100)

  • 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: 0.20% (FIRST EPSS).
  • Fixed version: Linux Linux 6489ec0107860345bc57dcde39e63dfb05ac5c11, b5c531a9a7d8e047c90c909f09cef06a9f8e62f4, b7ad75c77349beb4983b9f27108d9b3f33ae1413.

Low priority for now. Upgrade to Linux Linux 6489ec0107860345bc57dcde39e63dfb05ac5c11, b5c531a9a7d8e047c90c909f09cef06a9f8e62f4, b7ad75c77349beb4983b9f27108d9b3f33ae1413 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: s390/dcssblk: fix kernel crash with list_add corruption Commit fb08a1908cb1 ("dax: simplify the dax_device <-> gendisk association") introduced new logic for gendisk association, requiring drivers to explicitly call dax_add_host() and dax_remove_host(). For dcssblk driver, some dax_remove_host() calls were missing, e.g. in device remove path. The commit also broke error handling for out_dax case in device add path, resulting in an extra put_device() w/o the previous get_device() in that case. This lead to stale xarray entries after device add / remove cycles. In the case when a previously used struct gendisk pointer (xarray index) would be used again, because blk_alloc_disk() happened to return such a pointer, the xa_insert() in dax_add_host() would fail and go to out_dax, doing the extra put_device() in the error path. In combination with an already flawed error handling in dcssblk (device_register() cleanup), which needs to be addressed in a separate patch, this resulted in a missing device_del() / klist_del(), and eventually in the kernel crash with list_add corruption on a subsequent device_add() / klist_add(). Fix this by adding the missing dax_remove_host() calls, and also move the put_device() in the error path to restore the previous logic.

Published
Dec 24, 2025
Updated
Jun 17, 2026
EPSS
0.2% · 11th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

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Noroxi analysis

What does it mean in your environment?

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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

    • 5.17affected
    • fb08a1908cb119a4585611d91461ab6d27756b14 and later · before 6489ec0107860345bc57dcde39e63dfb05ac5c11affected · git
    • fb08a1908cb119a4585611d91461ab6d27756b14 and later · before b7ad75c77349beb4983b9f27108d9b3f33ae1413affected · git
    • fb08a1908cb119a4585611d91461ab6d27756b14 and later · before b5c531a9a7d8e047c90c909f09cef06a9f8e62f4affected · git
    • fb08a1908cb119a4585611d91461ab6d27756b14 and later · before c8f40a0bccefd613748d080147469a4652d6e74caffected · git
    • before 5.17not affected · semver
    • 6.1.53 and later · up to and including 6.1.*not affected · semver
    • 6.4.16 and later · up to and including 6.4.*not affected · semver
    • 6.5.3 and later · up to and including 6.5.*not affected · semver
    • 6.6 and laternot affected · original_commit_for_fix

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.55-16.1.55-1
Debian:13linuxbefore 6.5.3-16.5.3-1

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-2023-54114Dec 24, 2025 · net: nsh: Use correct mac_offset to unwind gso skb in nsh_gso_segment()
    0Monitor
  • ← EarlierCVE-2023-54115Dec 24, 2025 · pcmcia: rsrc_nonstatic: Fix memory leak in nonstatic_release_resource_db()
    0Monitor
  • Later →CVE-2023-54118Dec 24, 2025 · serial: sc16is7xx: setup GPIO controller later in probe
    0Monitor

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 Linux6489ec0107860345bc57dcde39e63dfb05ac5c11Vendor (CNA)
Linux Linuxb5c531a9a7d8e047c90c909f09cef06a9f8e62f4Vendor (CNA)
Linux Linuxb7ad75c77349beb4983b9f27108d9b3f33ae1413Vendor (CNA)
Linux Linuxc8f40a0bccefd613748d080147469a4652d6e74cVendor (CNA)
debian:linux6.1.55-1 · Debian:12Package registry (OSV)

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.

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

Technical details

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

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.

References

Show all references (3 more)

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

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