Unknown

CVE-2026-89865 — scsi: qla2xxx: Zero SFP DMA buffer in FRU/I2C bsg handlers

In the Linux kernel, the following vulnerability has been resolved: scsi: qla2xxx: Zero SFP DMA buffer in FRU/I2C bsg handlers The FRU and I2C bsg handlers stage their transfer in a DMA_POOL_SIZE (256-byte) bounce buffer obtained from dma_pool_alloc(), which does not zero the allocation. They initialize only a few leading bytes before handing the buffer to qla2x00_write_sfp(). qla2x00_write_sfp() can override the transfer length with a user-supplied value: if (len == 1) opt |= BIT_0; if (opt & BIT_0) len = *sfp; *sfp is the first byte of the (user-controlled) payload, so len can grow up to 255. The device then DMA-reads len bytes from the 256-byte pool buffer. Since only a small prefix was written (e.g. MAX_FRU_SIZE == 36 bytes for a FRU version, one byte for a FRU status register), the hardware reads past the initialized region and writes up to ~219 bytes of stale DMA-pool heap memory to the device flash. Allocate the buffer with dma_pool_zalloc() in all five FRU/I2C handlers so any bytes beyond the initialized data are zero rather than stale heap contents.

Published Sep 16, 2026 · Updated Oct 19, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP, GitHub Security Advisories · CNA: Linux

Low

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.

How the score was calculated

EPSS 0.2% (30-day exploitation probability)+2

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Not confirmed

Not in CISA KEV — an absence of record, not proof it is unexploited.

EPSS FIRST

0.21%

ahead of 11% of scored CVEs · Oct 20, 2026

Affects

Linux

CVSS base

—

Score not published yet.

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (Linux Linux).
No fix documented in the sources: reduce exposure and monitor the vendor advisory.
Search available logs for exploit probes, errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Linux	Linux	≥ 697a4bc69159c3396035b0506ffa55c4b2d0b1f4 and < a476377a66897549dd49bee319f4df66623417b7≥ 697a4bc69159c3396035b0506ffa55c4b2d0b1f4 and < 09703bc7c0be3a7a155b0ff5f21f6765ba3f519c≥ 697a4bc69159c3396035b0506ffa55c4b2d0b1f4 and < 97c45c75f5cdec96b1a4fba8b1d55d0dd01af1e8≥ 697a4bc69159c3396035b0506ffa55c4b2d0b1f4 and < 84bde5ce4038d9ad811e5c994305bbfcbd7a9f79≥ 697a4bc69159c3396035b0506ffa55c4b2d0b1f4 and < 581590f560b74399151b3cbc88574424c2f3d2dc≥ 697a4bc69159c3396035b0506ffa55c4b2d0b1f4 and < b157256c28086c434afd70cc78bf9b4d8caf1276≥ 697a4bc69159c3396035b0506ffa55c4b2d0b1f4 and < a5501c42256235523c4dddf799f032dfbf4f4c77≥ 697a4bc69159c3396035b0506ffa55c4b2d0b1f4 and < b47d4a1547d9ef21b2e9d1a739fe2204d4be05dc and 1 more version 3.2	Vulnerable	CVE Program (cve.org) e CISA ADP

EPSS over time FIRST

Oct 15, 2026 → Oct 20, 2026 · 5 reading(s) · max 0.21%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Not enough vector or weakness data: use the affected application’s logs as a starting point.

application logs

Timeline

What happened to this CVE, newest first.

2026
Record published
Oct 15, 2026
Affected products added · linux/linux
Oct 15, 2026 · CVE Program (cve.org) e CISA ADP
Source status changed · → Received
Oct 15, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 15, 2026 · NIST National Vulnerability Database
CVE published
Sep 16, 2026 · Linux

Source activity

Repeated readings are counted rather than listed.

1× References added · Oct 19, 2026 – Oct 19, 2026
1× Official description updated · Oct 15, 2026 – Oct 15, 2026

References

10 on the record

git.kernel.org/stable/c/a476377a66897549dd49bee319f4df66623417b7
NIST National Vulnerability Database
nvd.nist.gov/vuln/detail/CVE-2026-89865
GitHub Security Advisories
git.kernel.org/stable/c/97c45c75f5cdec96b1a4fba8b1d55d0dd01af1e8
NIST National Vulnerability Database
git.kernel.org/stable/c/84bde5ce4038d9ad811e5c994305bbfcbd7a9f79
NIST National Vulnerability Database
git.kernel.org/stable/c/581590f560b74399151b3cbc88574424c2f3d2dc
NIST National Vulnerability Database
github.com/advisories/GHSA-rqfh-jqm9-82qm
GitHub Security Advisories
git.kernel.org/stable/c/b47d4a1547d9ef21b2e9d1a739fe2204d4be05dc
NIST National Vulnerability Database
git.kernel.org/stable/c/a5501c42256235523c4dddf799f032dfbf4f4c77
NIST National Vulnerability Database
git.kernel.org/stable/c/09703bc7c0be3a7a155b0ff5f21f6765ba3f519c
NIST National Vulnerability Database
git.kernel.org/stable/c/b157256c28086c434afd70cc78bf9b4d8caf1276
NIST National Vulnerability Database

Elsewhere on this site

Linux
every CVE for this vendor

Related CVEs (same products)

Unknown CVE-2026-98869 bpf: Infer zext_dst based on static register liveness analysis 1h
Unknown CVE-2023-7356 Bluetooth: ISO: Copy BASE if service data matches EIR_BAA_SERVICE_UUID 1h
Unknown CVE-2026-98866 sched/cache: Introduce task_struct->sched_cache_grp to fix UAF 3d
Unknown CVE-2026-98867 dm-pcache: bound the logical key offset from persistent memory 3d
Unknown CVE-2026-98868 dm-pcache: reject a kset that overruns its segment 3d
Unknown CVE-2026-98856 kprobes: Skip disarmed probes when checking optkprobe overlap 3d

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No CVSS score published by NVD, the CNA, CISA or GitHub so far.
No fixed version, patch or mitigation documented.
No CISA SSVC assessment.
No CWE classification.
No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2026-89865 is "scsi: qla2xxx: Zero SFP DMA buffer in FRU/I2C bsg handlers", rated Unknown. It affects Linux (Linux); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. EPSS 0.21% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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