5.5

CVE-2026-23261: nvme-fc: release admin tagset if init fails

Analyzed
AliasesUBUNTU-CVE-2026-23261DEBIAN-CVE-2026-23261
Published 18-03-2026Last modified 23-05-2026

Vulnerability summary

CVE-2026-23261 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.12% chance of exploitation in the next 30 days, higher than 1.7% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.12%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 13 · Related 11
MGASA-2026-0097MGASA-2026-0098SUSE-SU-2026:21834-1SUSE-SU-2026:2238-1USN-8278-1USN-8278-2

Timeline

  1. 18-03-2026
    PublishedVulnerability first disclosed.
  2. 23-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: nvme-fc: release admin tagset if init fails nvme_fabrics creates an NVMe/FC controller in following path: nvmf_dev_write() -> nvmf_create_ctrl() -> nvme_fc_create_ctrl() -> nvme_fc_init_ctrl() nvme_fc_init_ctrl() allocates the admin blk-mq resources right after nvme_add_ctrl() succeeds. If any of the subsequent steps fail (changing the controller state, scheduling connect work, etc.), we jump to the fail_ctrl path, which tears down the controller references but never frees the admin queue/tag set. The leaked blk-mq allocations match the kmemleak report seen during blktests nvme/fc. Check ctrl->ctrl.admin_tagset in the fail_ctrl path and call nvme_remove_admin_tag_set() when it is set so that all admin queue allocations are reclaimed whenever controller setup aborts.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.12%

Chance of exploitation in the next 30 days

Percentile

2%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.11% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu157 products
  • linuxAll versions (No fix recorded) | < 6.8.0-117.117
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 6.8.0-1055.58
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 5fe335a80548e2eda5d51fab801108b323600e95, < 7c54d3f5ebbc5982daaa004260242dc07ac943ea | ≥ 17c3a66d7ea2d303f783796d62f99e2e23b68c90, < fa301aef50e3f3b5be6ee53457608beae5aa7a01 | ≥ ea3442efabd0aa3930c5bab73c3901ef38ef6ac3, < e810b290922c535feb34bc90ab549446fe94d2a3 | ≥ ea3442efabd0aa3930c5bab73c3901ef38ef6ac3, < d1877cc7270302081a315a81a0ee8331f19f95c8 | 0d1840b2dd8fe073c020c39bf8e8e89488070801 | ≥ 6.6.118, < 6.6.124 | ≥ 6.12.60, < 6.12.70 | ≥ 6.17.10, < 6.18 | 6.18
  • linux_kernel≥ 6.6.118, < 6.6.124 | ≥ 6.12.60, < 6.12.70 | ≥ 6.17.10, < 6.18 | ≥ 6.18.1, < 6.18.10 | 6.18 | 6.18:rc7 | 6.19:rc1 | 6.19:rc2 | 6.19:rc3 | 6.19:rc4 | 6.19:rc5 | 6.19:rc7 | 6.19:rc8
Debian1 product
  • linux< 6.12.73-1 | < 6.18.10-1

3 vendors · 160 products

References

18 links
Show all 18 references