Unknown

CVE-2026-93264 — RDMA/efa: Fix PBL chunk length computation

In the Linux kernel, the following vulnerability has been resolved: RDMA/efa: Fix PBL chunk length computation On register MR, when creating the PBL, if it's an indirect PBL we create a chunk list to hold the PBL pages pointers. Each chunk is 4KB in size and can hold 510 addresses (EFA_PTRS_PER_CHUNK) and has a 12-byte control buffer at the end of it holding the next chunk's pointer and its length. If the PBL number of pages is a multiple of EFA_PTRS_PER_CHUNK, the calculated last chunk length is wrongly computed as 0, even though that chunk is fully populated with 510 real page pointers. This wrong length is used both to DMA map the chunk and is propagated to the device, causing the device to see the chunk as empty and reject the memory registration. Fix the calculation so it will be performed only if the number of pages isn't a multiple of EFA_PTRS_PER_CHUNK, if it is, its already handled in the above loop correctly. Also prevent out-of-bounds reach in the chunks array in such scenario.

Published Sep 24, 2026 · Updated Oct 15, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP · 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)+1

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

0.2%

ahead of 9% of scored CVEs · Oct 16, 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	≥ 40909f664d279765af430acc5db348a0b71c9b0a and < 665cd418b8561a099c3854443f8ad8ae751b72a0≥ 40909f664d279765af430acc5db348a0b71c9b0a and < 932e5684906a090644a9061fae2d254041c3b8f2≥ 40909f664d279765af430acc5db348a0b71c9b0a and < 489b28f2377afa70c18c45b06a6387f3d39bb123≥ 40909f664d279765af430acc5db348a0b71c9b0a and < aadf3f9b5edb7f0a77e9172b237d2e07c754829c≥ 40909f664d279765af430acc5db348a0b71c9b0a and < 3982714e15512b83115897806dacc94899683420≥ 40909f664d279765af430acc5db348a0b71c9b0a and < da7805f0211af19968584e621074f253ac07dba7≥ 40909f664d279765af430acc5db348a0b71c9b0a and < 1d4b5902773475fc97151379b7e5f09cad0fa57b≥ 40909f664d279765af430acc5db348a0b71c9b0a and < 229b42d7450c1cf96f45ec39ebb69211b06bc036 and 1 more version 5.2	Vulnerable	CVE Program (cve.org) e CISA ADP

EPSS over time FIRST

Oct 15, 2026 → Oct 16, 2026 · 2 reading(s) · max 0.20%

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 24, 2026 · Linux

Source activity

Repeated readings are counted rather than listed.

1× Official description updated · Oct 15, 2026 – Oct 15, 2026

References

8 on the record

git.kernel.org/stable/c/489b28f2377afa70c18c45b06a6387f3d39bb123
NIST National Vulnerability Database
git.kernel.org/stable/c/3982714e15512b83115897806dacc94899683420
NIST National Vulnerability Database
git.kernel.org/stable/c/229b42d7450c1cf96f45ec39ebb69211b06bc036
NIST National Vulnerability Database
git.kernel.org/stable/c/932e5684906a090644a9061fae2d254041c3b8f2
NIST National Vulnerability Database
git.kernel.org/stable/c/1d4b5902773475fc97151379b7e5f09cad0fa57b
NIST National Vulnerability Database
git.kernel.org/stable/c/665cd418b8561a099c3854443f8ad8ae751b72a0
NIST National Vulnerability Database
git.kernel.org/stable/c/da7805f0211af19968584e621074f253ac07dba7
NIST National Vulnerability Database
git.kernel.org/stable/c/aadf3f9b5edb7f0a77e9172b237d2e07c754829c
NIST National Vulnerability Database

Elsewhere on this site

Linux
every CVE for this vendor

Related CVEs (same products)

Critical CVE-2026-99999 ipv4: validate checksum_start before completing checksum 2d
Unknown CVE-2026-98432 ipv4: free inet_opt and ireq_opt after an RCU grace period 2d
Unknown CVE-2026-98424 wifi: cfg80211: undo netns switch if renaming the wiphy fails 3d
Unknown CVE-2026-98425 wifi: mac80211: don't warn when an IBSS has no channel to scan 3d
Unknown CVE-2026-98426 wifi: mwifiex: fix IRQ leak using wrong index in MSI-X error path 3d
Unknown CVE-2026-98427 net/sched: codel: bound the dropping loop per dequeue call 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-2026-93264 is "RDMA/efa: Fix PBL chunk length computation", 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 0.20% 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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