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NVD / CVE Program· CNA Linux

CVE-2026-23087: scsi: xen: scsiback: Fix potential memory leak in scsiback_remove()

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: 0.15% (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 24c441f0e24da175d7912095663f526ac480dc4f, 32e52b56056daf0f0881fd9254706acf25b4be97, 427b0fb30ddec3bad05dcd73b00718f98c7026d2.

Low priority for now. Upgrade to Linux Linux 24c441f0e24da175d7912095663f526ac480dc4f, 32e52b56056daf0f0881fd9254706acf25b4be97, 427b0fb30ddec3bad05dcd73b00718f98c7026d2 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: scsi: xen: scsiback: Fix potential memory leak in scsiback_remove() Memory allocated for struct vscsiblk_info in scsiback_probe() is not freed in scsiback_remove() leading to potential memory leaks on remove, as well as in the scsiback_probe() error paths. Fix that by freeing it in scsiback_remove().

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Feb 4, 2026
Updated
Nov 5, 2026
EPSS
0.1% · 4th 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%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

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-2026-23087

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

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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 kernel3.18 and later · before 5.10.249
  • linux linux kernel5.11 and later · before 5.15.199
  • linux linux kernel5.16 and later · before 6.1.162
  • linux linux kernel6.2 and later · before 6.6.122
  • linux linux kernel6.7 and later · before 6.12.68
  • linux linux kernel6.13 and later · before 6.18.8
  • 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

    • 3.18affected
    • d9d660f6e562a47b4065eeb7e538910b0471b988 and later · before a8bb3ec8d85951a56af0a72d93ccbc2aee42eef9affected · git
    • d9d660f6e562a47b4065eeb7e538910b0471b988 and later · before 427b0fb30ddec3bad05dcd73b00718f98c7026d2affected · git
    • d9d660f6e562a47b4065eeb7e538910b0471b988 and later · before 4a975c72429b050c234405668b742cdecc11548eaffected · git
    • d9d660f6e562a47b4065eeb7e538910b0471b988 and later · before f86264ec0e2b102fcd49bf3e4f32fee669d482fcaffected · git
    • d9d660f6e562a47b4065eeb7e538910b0471b988 and later · before 32e52b56056daf0f0881fd9254706acf25b4be97affected · git
    • d9d660f6e562a47b4065eeb7e538910b0471b988 and later · before 24c441f0e24da175d7912095663f526ac480dc4faffected · git
    • d9d660f6e562a47b4065eeb7e538910b0471b988 and later · before 901a5f309daba412e2a30364d7ec1492fa11c32caffected · git
    • before 3.18not affected · semver
    • 5.10.249 and later · up to and including 5.10.*not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.162-16.1.162-1
Debian:13linuxbefore 6.12.69-16.12.69-1
Debian:14linuxbefore 6.18.8-16.18.8-1

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-2026-23085Feb 4, 2026 · irqchip/gic-v3-its: Avoid truncating memory addresses
    22Monitor
  • ← EarlierCVE-2026-23086Feb 4, 2026 · vsock/virtio: cap TX credit to local buffer size
    22Monitor
  • Later →CVE-2026-23089Feb 4, 2026 · ALSA: usb-audio: Fix use-after-free in snd_usb_mixer_free()
    31Monitor

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 Linux24c441f0e24da175d7912095663f526ac480dc4fVendor (CNA)
Linux Linux32e52b56056daf0f0881fd9254706acf25b4be97Vendor (CNA)
Linux Linux427b0fb30ddec3bad05dcd73b00718f98c7026d2Vendor (CNA)
Linux Linux4a975c72429b050c234405668b742cdecc11548eVendor (CNA)
Linux Linux901a5f309daba412e2a30364d7ec1492fa11c32cVendor (CNA)
Linux Linuxa8bb3ec8d85951a56af0a72d93ccbc2aee42eef9Vendor (CNA)
Linux Linuxf86264ec0e2b102fcd49bf3e4f32fee669d482fcVendor (CNA)
debian:linux6.1.162-1 · 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.

No history yet (it accumulates with the daily EPSS job).

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-401 · Missing Release of Memory after Effective Lifetime

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

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

References

Show all references (8 more)

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

All records