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NVD / CVE Program· CNA Linux

CVE-2023-53615: scsi: qla2xxx: Fix deletion race condition

Noroxi assessment

Priority: Monitor (action score 18/100)

  • 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: 0.16% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. Special conditions such as timing or configuration are required.
  • Fixed version: Linux Linux 4d7da12483e98c451a51bd294a3d3494f0aee5eb, 6dfe4344c168c6ca20fe7640649aacfcefcccb26, a4628a5b98e4c6d905e1f7638242612d7db7d9c2.
  • Severity is disputed: the assigning authority (CNA) scores it 8.8, NVD 4.7.

Low priority for now. Upgrade to Linux Linux 4d7da12483e98c451a51bd294a3d3494f0aee5eb, 6dfe4344c168c6ca20fe7640649aacfcefcccb26, a4628a5b98e4c6d905e1f7638242612d7db7d9c2 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: qla2xxx: Fix deletion race condition System crash when using debug kernel due to link list corruption. The cause of the link list corruption is due to session deletion was allowed to queue up twice. Here's the internal trace that show the same port was allowed to double queue for deletion on different cpu. 20808683956 015 qla2xxx [0000:13:00.1]-e801:4: Scheduling sess ffff93ebf9306800 for deletion 50:06:0e:80:12:48:ff:50 fc4_type 1 20808683957 027 qla2xxx [0000:13:00.1]-e801:4: Scheduling sess ffff93ebf9306800 for deletion 50:06:0e:80:12:48:ff:50 fc4_type 1 Move the clearing/setting of deleted flag lock.

MediumCVSS 4.7 · v3.1—No exploit Fix available
Published
Oct 4, 2025
Updated
Aug 5, 2026
EPSS
0.1% · 5th percentile

Report tools

JSON

Action score

18

Monitor

Low priority for now.

CVSS
18 / 40 · 4.7 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CNA vs NVD score

NVD
4.7
CNA · Linux
8.8
4.1 point gap

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

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-2023-53615

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 kernel4.11 and later · before 5.4.258
  • linux linux kernel5.5 and later · before 5.10.195
  • linux linux kernel5.11 and later · before 5.15.132
  • linux linux kernel5.16 and later · before 6.1.54
  • linux linux kernel6.2 and later · before 6.5.4

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

    • 4.11affected
    • 726b85487067d7f5b23495bc33c484b8517c4074 and later · before a4628a5b98e4c6d905e1f7638242612d7db7d9c2affected · git
    • 726b85487067d7f5b23495bc33c484b8517c4074 and later · before 4d7da12483e98c451a51bd294a3d3494f0aee5ebaffected · git
    • 726b85487067d7f5b23495bc33c484b8517c4074 and later · before f1ea164be545629bf442c22f508ad9e7b94ac100affected · git
    • 726b85487067d7f5b23495bc33c484b8517c4074 and later · before cd06c45b326e44f0d21dc1b3fa23e71f46847e28affected · git
    • 726b85487067d7f5b23495bc33c484b8517c4074 and later · before b05017cb4ff75eea783583f3d400059507510ab1affected · git
    • 726b85487067d7f5b23495bc33c484b8517c4074 and later · before 6dfe4344c168c6ca20fe7640649aacfcefcccb26affected · git
    • before 4.11not affected · semver
    • 5.4.258 and later · up to and including 5.4.*not affected · semver
    • 5.10.195 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 6.1.55-16.1.55-1
Debian:13linuxbefore 6.5.6-16.5.6-1

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-2023-53613Oct 4, 2025 · dax: Fix dax_mapping_release() use after free
    31Monitor
  • ← EarlierCVE-2023-53614Oct 4, 2025 · mm/ksm: fix race with VMA iteration and mm_struct teardown
    18Monitor
  • Later →CVE-2023-53616Oct 4, 2025 · jfs: fix invalid free of JFS_IP(ipimap)->i_imap in diUnmount
    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 Linux4d7da12483e98c451a51bd294a3d3494f0aee5ebVendor (CNA)
Linux Linux6dfe4344c168c6ca20fe7640649aacfcefcccb26Vendor (CNA)
Linux Linuxa4628a5b98e4c6d905e1f7638242612d7db7d9c2Vendor (CNA)
Linux Linuxb05017cb4ff75eea783583f3d400059507510ab1Vendor (CNA)
Linux Linuxcd06c45b326e44f0d21dc1b3fa23e71f46847e28Vendor (CNA)
Linux Linuxf1ea164be545629bf442c22f508ad9e7b94ac100Vendor (CNA)
debian:linux6.1.55-1 · 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.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
High
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-362 · Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CVSS vector

CVSS:3.1/AV:L/AC:H/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

—

Change log

  1. Fix✗ → ✓

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

References

Show all references (5 more)

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

All records