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NVD / CVE Program· CNA Linux

CVE-2026-46149: scsi: target: configfs: Bound snprintf() return in tg_pt_gp_members_show()

Noroxi assessment

Priority: Monitor (action score 28/100)

  • 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: 0.14% (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 00d91bfdce5033f5d9b4915638ae9b0553848b5d, 12f2201a56957ba020392223a7393a5eba080c1b, 1f678d13e939f91840cb1ebe9b88544923539d3c; azl3 kernel 6.6.139.1-1 on Azure Linux 3.0 6.6.141.1-1.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 00d91bfdce5033f5d9b4915638ae9b0553848b5d, 12f2201a56957ba020392223a7393a5eba080c1b, 1f678d13e939f91840cb1ebe9b88544923539d3c; azl3 kernel 6.6.139.1-1 on Azure Linux 3.0 6.6.141.1-1 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: configfs: Bound snprintf() return in tg_pt_gp_members_show() target_tg_pt_gp_members_show() formats LUN paths with snprintf() into a 256-byte stack buffer, then will memcpy() cur_len bytes from that buffer. snprintf() returns the length the output would have had, which can exceed the buffer size when the fabric WWN is long because iSCSI IQN names can be up to 223 bytes. The check at the memcpy() site only guards the destination page write, not the source read, so memcpy() will read past the stack buffer and copy adjacent stack contents to the sysfs reader, which when CONFIG_FORTIFY_SOURCE is enabled, fortify_panic() will be triggered. Commit 27e06650a5ea ("scsi: target: target_core_configfs: Add length check to avoid buffer overflow") added the same bound to the target_lu_gp_members_show() but the tg_pt_gp variant was missed so resolve that here.

HighCVSS 7.1 · v3.1—No exploit Fix available
Published
May 28, 2026
Updated
Oct 19, 2026
EPSS
0.1% · 3th percentile

Report tools

JSON

Action score

28

Monitor

Low priority for now.

CVSS
28 / 40 · 7.1 / 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.

CNA vs NVD score

NVD
—
CNA · Linux
7.1
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.

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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 kernel2.6.38 and later · before 5.10.258
  • linux linux kernel5.11 and later · before 5.15.209
  • linux linux kernel5.16 and later · before 6.1.175
  • linux linux kernel6.2 and later · before 6.6.140
  • linux linux kernel6.7 and later · before 6.12.88
  • linux linux kernel6.13 and later · before 6.18.30
  • linux linux kernel6.19 and later · before 7.0.7
  • linux linux kernel7.1

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

    • 2.6.38affected
    • c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5 and later · before d3cc9d490c207d57a289054397349f6f8c90354eaffected · git
    • c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5 and later · before db0a4759d62cad4ff891e2d81ae4be73bb57f4a4affected · git
    • c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5 and later · before 12f2201a56957ba020392223a7393a5eba080c1baffected · git
    • c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5 and later · before 1f678d13e939f91840cb1ebe9b88544923539d3caffected · git
    • c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5 and later · before 72cc5ea7ef32bb5fa38bf0dd2e56fcd73aa8c89eaffected · git
    • c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5 and later · before 00d91bfdce5033f5d9b4915638ae9b0553848b5daffected · git
    • c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5 and later · before e501154f9d82c95d2719bcbbaf679d8fd3226ef7affected · git
    • c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5 and later · before 772a896a56e0e3ef9424a025cec9176f9d8f4552affected · git
    • before 2.6.38not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
AlmaLinux:10kernelbefore 6.12.0-211.55.1.el10_26.12.0-211.55.1.el10_2
AlmaLinux:10kernel-64kbefore 6.12.0-211.55.1.el10_26.12.0-211.55.1.el10_2
AlmaLinux:10kernel-64k-corebefore 6.12.0-211.55.1.el10_26.12.0-211.55.1.el10_2
AlmaLinux:10kernel-64k-debugbefore 6.12.0-211.55.1.el10_26.12.0-211.55.1.el10_2
AlmaLinux:10kernel-64k-debug-corebefore 6.12.0-211.55.1.el10_26.12.0-211.55.1.el10_2
AlmaLinux:10kernel-64k-debug-develbefore 6.12.0-211.55.1.el10_26.12.0-211.55.1.el10_2
AlmaLinux:10kernel-64k-debug-devel-matchedbefore 6.12.0-211.55.1.el10_26.12.0-211.55.1.el10_2
AlmaLinux:10kernel-64k-debug-modulesbefore 6.12.0-211.55.1.el10_26.12.0-211.55.1.el10_2
AlmaLinux:10kernel-64k-debug-modules-corebefore 6.12.0-211.55.1.el10_26.12.0-211.55.1.el10_2
AlmaLinux:10kernel-64k-debug-modules-extrabefore 6.12.0-211.55.1.el10_26.12.0-211.55.1.el10_2
AlmaLinux:10kernel-64k-develbefore 6.12.0-211.55.1.el10_26.12.0-211.55.1.el10_2
AlmaLinux:10kernel-64k-devel-matchedbefore 6.12.0-211.55.1.el10_26.12.0-211.55.1.el10_2
AlmaLinux:10kernel-64k-modulesbefore 6.12.0-211.55.1.el10_26.12.0-211.55.1.el10_2
AlmaLinux:10kernel-64k-modules-corebefore 6.12.0-211.55.1.el10_26.12.0-211.55.1.el10_2
AlmaLinux:10kernel-64k-modules-extrabefore 6.12.0-211.55.1.el10_26.12.0-211.55.1.el10_2
AlmaLinux:10kernel-abi-stablelistsbefore 6.12.0-211.55.1.el10_26.12.0-211.55.1.el10_2
AlmaLinux:10kernel-corebefore 6.12.0-211.55.1.el10_26.12.0-211.55.1.el10_2
AlmaLinux:10kernel-cross-headersbefore 6.12.0-211.55.1.el10_26.12.0-211.55.1.el10_2
AlmaLinux:10kernel-debugbefore 6.12.0-211.55.1.el10_26.12.0-211.55.1.el10_2
AlmaLinux:10kernel-debug-corebefore 6.12.0-211.55.1.el10_26.12.0-211.55.1.el10_2
AlmaLinux:10kernel-debug-develbefore 6.12.0-211.55.1.el10_26.12.0-211.55.1.el10_2
AlmaLinux:10kernel-debug-devel-matchedbefore 6.12.0-211.55.1.el10_26.12.0-211.55.1.el10_2
AlmaLinux:10kernel-debug-modulesbefore 6.12.0-211.55.1.el10_26.12.0-211.55.1.el10_2
AlmaLinux:10kernel-debug-modules-corebefore 6.12.0-211.55.1.el10_26.12.0-211.55.1.el10_2

+96

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-2026-46146May 28, 2026 · ALSA: usb-audio: Avoid potential endless loop in convert_chmap_v3()
    22Monitor
  • ← EarlierCVE-2026-46148May 28, 2026 · spi: microchip-core-qspi: control built-in cs manually
    22Monitor
  • Later →CVE-2026-46150May 28, 2026 · fanotify: fix false positive on permission events
    28Monitor

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 Linux00d91bfdce5033f5d9b4915638ae9b0553848b5dVendor (CNA)
Linux Linux12f2201a56957ba020392223a7393a5eba080c1bVendor (CNA)
Linux Linux1f678d13e939f91840cb1ebe9b88544923539d3cVendor (CNA)
Linux Linux72cc5ea7ef32bb5fa38bf0dd2e56fcd73aa8c89eVendor (CNA)
Linux Linux772a896a56e0e3ef9424a025cec9176f9d8f4552Vendor (CNA)
Linux Linuxd3cc9d490c207d57a289054397349f6f8c90354eVendor (CNA)
Linux Linuxdb0a4759d62cad4ff891e2d81ae4be73bb57f4a4Vendor (CNA)
Linux Linuxe501154f9d82c95d2719bcbbaf679d8fd3226ef7Vendor (CNA)
azl3 kernel 6.6.139.1-1 on Azure Linux 3.06.6.141.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
almalinux:kernel5.14.0-687.46.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k5.14.0-687.46.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-core5.14.0-687.46.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug5.14.0-687.46.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-core5.14.0-687.46.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-devel5.14.0-687.46.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-devel-matched5.14.0-687.46.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-modules5.14.0-687.46.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-modules-core5.14.0-687.46.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-modules-extra5.14.0-687.46.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-devel5.14.0-687.46.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-devel-matched5.14.0-687.46.1.el9_8 · AlmaLinux:9Package registry (OSV)
debian:linux6.1.176-1 · Debian:12Package registry (OSV)
red hat:kernel-64k-debug-debuginfo0:5.14.0-687.46.1.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-debug-devel0:5.14.0-687.46.1.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-debug-devel-matched0:5.14.0-687.46.1.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-debuginfo0:5.14.0-687.46.1.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-devel0:5.14.0-687.46.1.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-devel-matched0:5.14.0-687.46.1.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-debug-debuginfo0:5.14.0-687.46.1.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-debug-devel0:5.14.0-687.46.1.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)

+25

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.

  • CVE-2026-4318522 days apartksmbd: fix signededness bug in smb_direct_prepare_negotiation()
    39Monitor
  • CVE-2026-5320228 days apartaccel/ivpu: Fix signed integer truncation in IPC receive
    31Monitor
  • CVE-2026-5326728 days apartnetfilter: nft_ct: bail out on template ct in get eval
    31Monitor
  • CVE-2025-38459307 days apartatm: clip: Fix infinite recursive call of clip_push().
    31Monitor
  • CVE-2026-5339552 days apartnfsd: fix dead ACL conflict guard in nfsd4_create
    30Monitor
  • CVE-2026-5332934 days apartdrm/amd/display: Use krealloc_array() in dal_vector_reserve()
    28Monitor

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

  • 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
high · data can be read
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
High
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:H/I:N/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 (8 more)

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

All records