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NVD / CVE Program· CNA Linux

CVE-2026-89864: scsi: qla2xxx: Bound i2c->length in I2C bsg handlers

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 0918ee2c0eeb4d7f45b82b3dc11e65c2d9b7ad59, 2be39946abcde5a6416fb074ef728429e246a996, 32d6df14fdab71fe1ba304fd9a0db0411ea2e043; 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 0918ee2c0eeb4d7f45b82b3dc11e65c2d9b7ad59, 2be39946abcde5a6416fb074ef728429e246a996, 32d6df14fdab71fe1ba304fd9a0db0411ea2e043; 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: Bound i2c->length in I2C bsg handlers struct qla_i2c_access carries a 16-bit length field alongside a fixed 64-byte buffer: struct qla_i2c_access { uint16_t device, offset, option, length; uint8_t buffer[0x40]; } __packed; qla2x00_write_i2c() and qla2x00_read_i2c() use the user-supplied i2c->length without any bounds check. i2c is overlaid on a 256-byte on-stack buffer and sfp is a 256-byte DMA-pool buffer, so a length up to 65535 overruns both: - write: memcpy(sfp, i2c->buffer, i2c->length) over-reads the stack and over-writes the sfp heap buffer, and qla2x00_write_sfp() then DMAs i2c->length bytes out of the 256-byte buffer. - read: qla2x00_read_sfp() DMAs i2c->length bytes into the 256-byte sfp, then memcpy(i2c->buffer, sfp, i2c->length) overflows the 64-byte buffer inside the on-stack array. A caller holding CAP_SYS_RAWIO can use this to corrupt the heap and the kernel stack. Reject requests whose length exceeds the buffer before any copy or DMA transfer in both handlers.

—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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Noroxi analysis

What does it mean in your environment?

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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

    • 3.7affected
    • 9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae and later · before 8f01f886cc5e7bbc16cbf1a9928fdebbc911e973affected · git
    • 9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae and later · before 2be39946abcde5a6416fb074ef728429e246a996affected · git
    • 9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae and later · before 522d6dcdc645d8f97d6b4cdfd6d8eea307f3ff0eaffected · git
    • 9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae and later · before 9a756f277eb89f769dbf380f38245c270d31fdb5affected · git
    • 9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae and later · before 32d6df14fdab71fe1ba304fd9a0db0411ea2e043affected · git
    • 9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae and later · before 97ca58b0fb026799b99e3d552d5f69cf9a3113adaffected · git
    • 9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae and later · before 47049fdadc0eaa115e813735b827e1379c0d2cf8affected · git
    • 9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae and later · before 0918ee2c0eeb4d7f45b82b3dc11e65c2d9b7ad59affected · git
    • before 3.7not 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-2026-89862Sep 16, 2026 · scsi: qla2xxx: Fix BSG job leak on validate flash image error path
    0Monitor
  • ← EarlierCVE-2026-89863Sep 16, 2026 · scsi: qla2xxx: edif: Fix NULL pointer deref in RX SA delete check
    30Monitor
  • Later →CVE-2026-89865Sep 16, 2026 · scsi: qla2xxx: Zero SFP DMA buffer in FRU/I2C bsg handlers
    0Monitor

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 Linux0918ee2c0eeb4d7f45b82b3dc11e65c2d9b7ad59Vendor (CNA)
Linux Linux2be39946abcde5a6416fb074ef728429e246a996Vendor (CNA)
Linux Linux32d6df14fdab71fe1ba304fd9a0db0411ea2e043Vendor (CNA)
Linux Linux47049fdadc0eaa115e813735b827e1379c0d2cf8Vendor (CNA)
Linux Linux522d6dcdc645d8f97d6b4cdfd6d8eea307f3ff0eVendor (CNA)
Linux Linux8f01f886cc5e7bbc16cbf1a9928fdebbc911e973Vendor (CNA)
Linux Linux97ca58b0fb026799b99e3d552d5f69cf9a3113adVendor (CNA)
Linux Linux9a756f277eb89f769dbf380f38245c270d31fdb5Vendor (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.

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