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NVD / CVE Program· CNA Linux

CVE-2026-23292: scsi: target: Fix recursive locking in __configfs_open_file()

MediumCVSS 5.5 · v3.1—No exploit Fix available

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 142eacb50fb903a4c10dee7e67b6e79ebb36a582, 14d4ac19d1895397532eec407433c5d74d9da53b, 3161ef61f121d4573cad5b57c92188dcd9b284b3; azl3 kernel 6.6.126.1-1 on Azure Linux 3.0 6.6.130.1-1.

Low priority for now. Upgrade to Linux Linux 142eacb50fb903a4c10dee7e67b6e79ebb36a582, 14d4ac19d1895397532eec407433c5d74d9da53b, 3161ef61f121d4573cad5b57c92188dcd9b284b3; azl3 kernel 6.6.126.1-1 on Azure Linux 3.0 6.6.130.1-1 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: scsi: target: Fix recursive locking in __configfs_open_file() In flush_write_buffer, &p->frag_sem is acquired and then the loaded store function is called, which, here, is target_core_item_dbroot_store(). This function called filp_open(), following which these functions were called (in reverse order), according to the call trace: down_read __configfs_open_file do_dentry_open vfs_open do_open path_openat do_filp_open file_open_name filp_open target_core_item_dbroot_store flush_write_buffer configfs_write_iter target_core_item_dbroot_store() tries to validate the new file path by trying to open the file path provided to it; however, in this case, the bug report shows: db_root: not a directory: /sys/kernel/config/target/dbroot indicating that the same configfs file was tried to be opened, on which it is currently working on. Thus, it is trying to acquire frag_sem semaphore of the same file of which it already holds the semaphore obtained in flush_write_buffer(), leading to acquiring the semaphore in a nested manner and a possibility of recursive locking. Fix this by modifying target_core_item_dbroot_store() to use kern_path() instead of filp_open() to avoid opening the file using filesystem-specific function __configfs_open_file(), and further modifying it to make this fix compatible.

Published
Mar 25, 2026
Updated
Nov 5, 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%

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-2026-23292

When you'll hear from us

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  • when exploit code appears or is weaponized
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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.

VendorProduct
linuxlinux kernel

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

    • 49824b5c875087a52672b0c8e8ecbefe6f773532, 09e21253d17f53bdb5aac0e0dbd057a29fcbe8d1, 0dfc45be875a378c2a3a4d6ed8e668ec8eb75073, 5.3affected
    • b0841eefd9693827afb9888235e26ddd098f9cef and later · before 3161ef61f121d4573cad5b57c92188dcd9b284b3affected · git
    • b0841eefd9693827afb9888235e26ddd098f9cef and later · before e8ef82cb6443d5f3260b1b830e17f03dda4229eaaffected · git
    • b0841eefd9693827afb9888235e26ddd098f9cef and later · before 4fcfa424a581d823cb1a9676e3eefe6ca17e453aaffected · git
    • b0841eefd9693827afb9888235e26ddd098f9cef and later · before 9a5641024fbfd9b24fe65984ad85fea10a3ae438affected · git
    • b0841eefd9693827afb9888235e26ddd098f9cef and later · before 142eacb50fb903a4c10dee7e67b6e79ebb36a582affected · git
    • b0841eefd9693827afb9888235e26ddd098f9cef and later · before 14d4ac19d1895397532eec407433c5d74d9da53baffected · git
    • 4.9.201 and later · before 4.10affected · semver
    • 4.14.154 and later · before 4.15affected · semver
    • 4.19.84 and later · before 4.20affected · semver
Affected versions · NVD (10)

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

  • linux linux kernel4.9.201 and later · before 4.10
  • linux linux kernel4.14.154 and later · before 4.15
  • linux linux kernel4.19.84 and later · before 4.20
  • linux linux kernel5.3.1 and later · before 6.1.167
  • linux linux kernel6.2 and later · before 6.6.130
  • linux linux kernel6.7 and later · before 6.12.77
  • linux linux kernel6.13 and later · before 6.18.17
  • linux linux kernel6.19 and later · before 6.19.7
  • linux linux kernel5.3
  • linux linux kernel7.0

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.170-16.1.170-1
Debian:13linuxbefore 6.12.85-16.12.85-1
Debian:14linuxbefore 6.19.8-16.19.8-1

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-2026-23290Mar 25, 2026 · net: usb: pegasus: validate USB endpoints
    22Monitor
  • ← EarlierCVE-2026-23291Mar 25, 2026 · nfc: pn533: properly drop the usb interface reference on disconnect
    22Monitor
  • Later →CVE-2026-23293Mar 25, 2026 · net: vxlan: fix nd_tbl NULL dereference when IPv6 is disabled
    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 Linux142eacb50fb903a4c10dee7e67b6e79ebb36a582Vendor (CNA)
Linux Linux14d4ac19d1895397532eec407433c5d74d9da53bVendor (CNA)
Linux Linux3161ef61f121d4573cad5b57c92188dcd9b284b3Vendor (CNA)
Linux Linux4.10Vendor (CNA)
Linux Linux4.15Vendor (CNA)
Linux Linux4.20Vendor (CNA)
Linux Linux4fcfa424a581d823cb1a9676e3eefe6ca17e453aVendor (CNA)
Linux Linux9a5641024fbfd9b24fe65984ad85fea10a3ae438Vendor (CNA)
Linux Linuxe8ef82cb6443d5f3260b1b830e17f03dda4229eaVendor (CNA)
azl3 kernel 6.6.126.1-1 on Azure Linux 3.06.6.130.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
debian:linux6.1.170-1 · 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.

Variant candidates

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

  • CVE-2026-4318542 days apartksmbd: fix signededness bug in smb_direct_prepare_negotiation()
    39Monitor
  • CVE-2026-5320292 days apartaccel/ivpu: Fix signed integer truncation in IPC receive
    31Monitor
  • CVE-2026-5326792 days apartnetfilter: nft_ct: bail out on template ct in get eval
    31Monitor
  • CVE-2025-38459243 days apartatm: clip: Fix infinite recursive call of clip_push().
    31Monitor
  • CVE-2026-53395116 days apartnfsd: fix dead ACL conflict guard in nfsd4_create
    30Monitor
  • CVE-2026-4614964 days apartscsi: target: configfs: Bound snprintf() return in tg_pt_gp_members_show()
    28Monitor

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

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-674 · Uncontrolled Recursion

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.

ATT&CK techniques

—

References

Show all references (6 more)

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

All records