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NVD / CVE Program· CNA Linux

CVE-2026-89843: scsi: qla2xxx: Zero-init bsg stack buffers to avoid info leak

Noroxi assessment

Priority: Monitor (action score 0/100)

  • 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: 0.21% (FIRST EPSS).
  • Fixed version: Linux Linux 1c820d0900e4aacd5020b989159f6b4b2f7d0d6a, 26bc6a2c235a70bfc9b6de412600208aca820e20, 4fe5790674097897a1af1367d1e384f7e5a62fb7; azl3 kernel 6.6.152.1-1 on Azure Linux 3.0 6.6.157.1-1.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 1c820d0900e4aacd5020b989159f6b4b2f7d0d6a, 26bc6a2c235a70bfc9b6de412600208aca820e20, 4fe5790674097897a1af1367d1e384f7e5a62fb7; azl3 kernel 6.6.152.1-1 on Azure Linux 3.0 6.6.157.1-1 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: qla2xxx: Zero-init bsg stack buffers to avoid info leak Several bsg handlers stage their request/reply in an uninitialized 256-byte on-stack buffer (uint8_t bsg[DMA_POOL_SIZE]) and fill it via sg_copy_to_buffer(), which only copies as many bytes as the user-supplied request payload. When the request is shorter than the structure, the remainder of the buffer is left holding stale stack data. qla2x00_read_fru_status() and qla2x00_read_i2c() then copy the full structure back to the reply payload with sg_copy_from_buffer(), leaking the uninitialized stack bytes to user space. The write/update paths do not copy the buffer back, but can feed uninitialized fields to the device. Zero the stack buffer at declaration in all five handlers, mirroring the heap kzalloc() approach, so short requests can no longer expose stale memory.

—No exploit Fix available
Published
Sep 16, 2026
Updated
Oct 19, 2026
EPSS
0.2% · 12th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

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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.

—

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

    • 3.2affected
    • 697a4bc69159c3396035b0506ffa55c4b2d0b1f4 and later · before 1c820d0900e4aacd5020b989159f6b4b2f7d0d6aaffected · git
    • 697a4bc69159c3396035b0506ffa55c4b2d0b1f4 and later · before 26bc6a2c235a70bfc9b6de412600208aca820e20affected · git
    • 697a4bc69159c3396035b0506ffa55c4b2d0b1f4 and later · before 5ab32dff910291b5e6bf6223f8a4003536c1800aaffected · git
    • 697a4bc69159c3396035b0506ffa55c4b2d0b1f4 and later · before 947c6bfcf7f5ec924995bec43e3108b98c75b44eaffected · git
    • 697a4bc69159c3396035b0506ffa55c4b2d0b1f4 and later · before 708c0ec1e09c52fee24b74ce9398bf3f8d1c83fdaffected · git
    • 697a4bc69159c3396035b0506ffa55c4b2d0b1f4 and later · before 4fe5790674097897a1af1367d1e384f7e5a62fb7affected · git
    • 697a4bc69159c3396035b0506ffa55c4b2d0b1f4 and later · before 7881faf862ee301ecfe3adc0725bd2fa0021cd95affected · git
    • 697a4bc69159c3396035b0506ffa55c4b2d0b1f4 and later · before b93d3bb3afe1b44489927de1eb4e66e8536a5935affected · git
    • before 3.2not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.190-16.1.190-1
Debian:12linux-6.12before 6.12.111-1~deb12u16.12.111-1~deb12u1
Debian:13linuxbefore 6.12.111-16.12.111-1
Debian:14linuxbefore 7.2.6-17.2.6-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-89841Sep 16, 2026 · f2fs: only redirty pinned folios in redirty_blocks
    31Monitor
  • ← EarlierCVE-2026-89842Sep 16, 2026 · scsi: qla2xxx: Skip NVMe LS reject IOCB when FW not started
    0Monitor
  • Later →CVE-2026-89844Sep 16, 2026 · scsi: qla2xxx: Hold vport_slock for host map update in report ID acquisition
    35Monitor

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 Linux1c820d0900e4aacd5020b989159f6b4b2f7d0d6aVendor (CNA)
Linux Linux26bc6a2c235a70bfc9b6de412600208aca820e20Vendor (CNA)
Linux Linux4fe5790674097897a1af1367d1e384f7e5a62fb7Vendor (CNA)
Linux Linux5ab32dff910291b5e6bf6223f8a4003536c1800aVendor (CNA)
Linux Linux708c0ec1e09c52fee24b74ce9398bf3f8d1c83fdVendor (CNA)
Linux Linux7881faf862ee301ecfe3adc0725bd2fa0021cd95Vendor (CNA)
Linux Linux947c6bfcf7f5ec924995bec43e3108b98c75b44eVendor (CNA)
Linux Linuxb93d3bb3afe1b44489927de1eb4e66e8536a5935Vendor (CNA)
azl3 kernel 6.6.150.1-1 on Azure Linux 3.0—Microsoft (MSRC)
azl3 kernel 6.6.152.1-1 on Azure Linux 3.06.6.157.1-1 · Release NotesMicrosoft (MSRC)
debian:linux6.1.190-1 · Debian:12Package registry (OSV)
debian:linux6.12.111-1 · Debian:13Package registry (OSV)
debian:linux-6.126.12.111-1~deb12u1 · 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.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

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).

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

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

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

  1. Fix✗ → ✓

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References

Show all references (7 more)

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

All records