CVE-2026-23296: scsi: core: Fix refcount leak for tagset_refcnt
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: 0.12% (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 0e274674714427dc578bb99db5b86e312d2b57f8, 1ac22c8eae81366101597d48360718dff9b9d980, 5.11; 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 0e274674714427dc578bb99db5b86e312d2b57f8, 1ac22c8eae81366101597d48360718dff9b9d980, 5.11; 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: core: Fix refcount leak for tagset_refcnt This leak will cause a hang when tearing down the SCSI host. For example, iscsid hangs with the following call trace: [130120.652718] scsi_alloc_sdev: Allocation failure during SCSI scanning, some SCSI devices might not be configured PID: 2528 TASK: ffff9d0408974e00 CPU: 3 COMMAND: "iscsid" #0 [ffffb5b9c134b9e0] __schedule at ffffffff860657d4 #1 [ffffb5b9c134ba28] schedule at ffffffff86065c6f #2 [ffffb5b9c134ba40] schedule_timeout at ffffffff86069fb0 #3 [ffffb5b9c134bab0] __wait_for_common at ffffffff8606674f #4 [ffffb5b9c134bb10] scsi_remove_host at ffffffff85bfe84b #5 [ffffb5b9c134bb30] iscsi_sw_tcp_session_destroy at ffffffffc03031c4 [iscsi_tcp] #6 [ffffb5b9c134bb48] iscsi_if_recv_msg at ffffffffc0292692 [scsi_transport_iscsi] #7 [ffffb5b9c134bb98] iscsi_if_rx at ffffffffc02929c2 [scsi_transport_iscsi] #8 [ffffb5b9c134bbf0] netlink_unicast at ffffffff85e551d6 #9 [ffffb5b9c134bc38] netlink_sendmsg at ffffffff85e554ef
- Published
- Mar 25, 2026
- Updated
- Oct 15, 2026
- EPSS
- 0.1% · 2th percentile
- CWE
- —
Report tools
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%
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.
Running WordPress? Scan your site free with WP Lens
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.
We use this product, ask for helpAffected 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.
| Vendor | Product | CPE |
|---|---|---|
| linux | linux kernel | cpe:2.3:o:linux:linux_kernel |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- linux linux kernel5.10.223 and later · before 5.11
- linux linux kernel5.15.164 and later · before 5.15.203
- linux linux kernel5.19.12 and later · before 6.0
- linux linux kernel6.0.1 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 kernel6.0
- linux linux kernel7.0
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
- 2e7eb4c1e8af8385de22775bd0be552f59b28c9a, 6.0, 5ce8fad941233e81f2afb5b52a3fcddd3ba8732faffected
- 5.15.164 and later · before 5.15.203affected · semver
- 5.10.223 and later · before 5.11affected · semver
- 5.19.12 and later · before 5.20affected · semver
- before 6.0not affected · semver
- 5.15.203 and later · up to and including 5.15.*not affected · semver
- 6.1.167 and later · up to and including 6.1.*not affected · semver
- 6.6.130 and later · up to and including 6.6.*not affected · semver
- 6.12.77 and later · up to and including 6.12.*not affected · semver
- 6.18.17 and later · up to and including 6.18.*not affected · semver
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | linux | before 6.1.170-1 | 6.1.170-1 |
| Debian:13 | linux | before 6.12.85-1 | 6.12.85-1 |
| Debian:14 | linux | before 6.19.8-1 | 6.19.8-1 |
Same product
linux: all recordsOther highest-scoring records for the same primary product.
- CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV90Now
- 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 KEV89Now
- CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV85Now
Published before and after this one in the same product
- ← EarlierCVE-2026-23293Mar 25, 2026 · net: vxlan: fix nd_tbl NULL dereference when IPv6 is disabled22Monitor
- ← EarlierCVE-2026-23295Mar 25, 2026 · accel/amdxdna: Fix dead lock for suspend and resume22Monitor
- Later →CVE-2026-23300Mar 25, 2026 · net: ipv6: fix panic when IPv4 route references loopback IPv6 nexthop22Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| Linux Linux | 0e274674714427dc578bb99db5b86e312d2b57f8 | Vendor (CNA) |
| Linux Linux | 1ac22c8eae81366101597d48360718dff9b9d980 | Vendor (CNA) |
| Linux Linux | 5.11 | Vendor (CNA) |
| Linux Linux | 5.15.203 | Vendor (CNA) |
| Linux Linux | 5.20 | Vendor (CNA) |
| Linux Linux | 7c01b680beaf4d3143866b062b8e770e8b237fb8 | Vendor (CNA) |
| Linux Linux | 944a333c8e4d42256556c1d2ebb6d773a33e0dcd | Vendor (CNA) |
| Linux Linux | 9f5e4abed9248448aa1b45b12ab0bea4d329b56a | Vendor (CNA) |
| Linux Linux | a03d96598d39fdf605d90731db3ef3b13fb8bdc8 | Vendor (CNA) |
| Linux Linux | ec5c17c687b189dbc09dfdec11b669caa40bc395 | Vendor (CNA) |
| azl3 kernel 6.6.126.1-1 on Azure Linux 3.0 | 6.6.130.1-1 · CBL-Mariner Releases | Microsoft (MSRC) |
| debian:linux | 6.1.170-1 · Debian:12 | Package 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 researchersFinders, 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)
—
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
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (7 more)Show less
- git.kernel.org/stable/c/1ac22c8eae81366101597d48360718dff9b9d980
- git.kernel.org/stable/c/7c01b680beaf4d3143866b062b8e770e8b237fb8
- git.kernel.org/stable/c/944a333c8e4d42256556c1d2ebb6d773a33e0dcd
- git.kernel.org/stable/c/9f5e4abed9248448aa1b45b12ab0bea4d329b56a
- git.kernel.org/stable/c/a03d96598d39fdf605d90731db3ef3b13fb8bdc8
- git.kernel.org/stable/c/ec5c17c687b189dbc09dfdec11b669caa40bc395
- cert-portal.siemens.com/productcert/html/ssa-784472.html
Vendor advisories and official records. Exploit/PoC links are deliberately left out.