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CVE.org (no NVD analysis yet)· CNA Linux

CVE-2026-98367: RDMA/siw: Clear association under lock if siw_qp_modify fails in siw_accept

Noroxi assessment

Priority: Monitor (action score 31/100)

  • 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: 0.12% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 030306bbb9273af80f14d7af20129661964cd9a7, 32cd87f54dd1070020e664ccb0312a9f0fea79b4, 9dcc0f4e488b70cff81e0e5717a498c929cf5de3; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 6.6.158.1-1.

Low priority for now. Upgrade to Linux Linux 030306bbb9273af80f14d7af20129661964cd9a7, 32cd87f54dd1070020e664ccb0312a9f0fea79b4, 9dcc0f4e488b70cff81e0e5717a498c929cf5de3; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 6.6.158.1-1 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: RDMA/siw: Clear association under lock if siw_qp_modify fails in siw_accept We need to clear cep before release state_lock as siw_qp_llp_close and siw_qp_modify->siw_qp_llp_close did. Otherwise if siw_qp_modify() fails in siw_accept(), the QP's state_lock is released before the error path cleanup. A concurrent ibv_modify_qp() transitioning the QP to ERROR can race in this window: siw_accept() ibv_modify_qp(ERROR) ---------------------- ---------------------- siw_qp_modify() fails up_write(&qp->state_lock) down_write(&qp->state_lock) nextstate_from_idle(): if (qp->cep) siw_cep_put(qp->cep) <- frees cep qp->cep = NULL goto error cep->qp = NULL <- UAF Clear qp->cep and drop the association reference taken by siw_cep_get(), all under the write lock held from the initial down_write(&qp->state_lock). Thread B therefore sees qp->cep == NULL, skips its own put, and cannot free the cep before siw_accept() is done with it.

HighCVSS 7.8 · v3.1—No exploit Fix available
Published
Oct 6, 2026
Updated
Oct 19, 2026
EPSS
0.1% · 1th percentile
CWE
—

Report tools

JSON

Action score

31

Monitor

Low priority for now.

CVSS
31 / 40 · 7.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CNA vs NVD score

NVD
—
CNA · Linux
7.8
NVD has not scored this yet; the score shown is the CNA’s.

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

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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

    • 5.3affected
    • 6c52fdc244b5ccc468006fd65a504d4ee33743c7 and later · before f11e09fe2fc3a11ccdf8f932b68181b0bb1d2078affected · git
    • 6c52fdc244b5ccc468006fd65a504d4ee33743c7 and later · before e3f039082856adab7e195dea1af45d93dd6a3f1caffected · git
    • 6c52fdc244b5ccc468006fd65a504d4ee33743c7 and later · before ad50d19f3d1ce052b3a146143581e930a1efb33eaffected · git
    • 6c52fdc244b5ccc468006fd65a504d4ee33743c7 and later · before 030306bbb9273af80f14d7af20129661964cd9a7affected · git
    • 6c52fdc244b5ccc468006fd65a504d4ee33743c7 and later · before df2584750314336edcbcc21fb388e04b260f35b7affected · git
    • 6c52fdc244b5ccc468006fd65a504d4ee33743c7 and later · before 9dcc0f4e488b70cff81e0e5717a498c929cf5de3affected · git
    • 6c52fdc244b5ccc468006fd65a504d4ee33743c7 and later · before bfdc744bf20ae4c3ef2e470298de5237c5c9a13caffected · git
    • 6c52fdc244b5ccc468006fd65a504d4ee33743c7 and later · before 32cd87f54dd1070020e664ccb0312a9f0fea79b4affected · git
    • before 5.3not 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 6.12.113-1~deb12u16.12.113-1~deb12u1
Debian:13linuxbefore 6.12.113-16.12.113-1
Debian:14linuxbefore 7.2.8-17.2.8-1

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-2026-98365Oct 6, 2026 · RDMA/rxe: Fix integer overflow in mr_check_range() leading to OOB access
    39Monitor
  • ← EarlierCVE-2026-98366Oct 6, 2026 · RDMA/rxe: validate access flags before swapping the MR's PD
    31Monitor
  • Later →CVE-2026-98368Oct 6, 2026 · esp: downgrade zerocopy managed frags before mutating skb frags
    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 Linux030306bbb9273af80f14d7af20129661964cd9a7Vendor (CNA)
Linux Linux32cd87f54dd1070020e664ccb0312a9f0fea79b4Vendor (CNA)
Linux Linux9dcc0f4e488b70cff81e0e5717a498c929cf5de3Vendor (CNA)
Linux Linuxad50d19f3d1ce052b3a146143581e930a1efb33eVendor (CNA)
Linux Linuxbfdc744bf20ae4c3ef2e470298de5237c5c9a13cVendor (CNA)
Linux Linuxdf2584750314336edcbcc21fb388e04b260f35b7Vendor (CNA)
Linux Linuxe3f039082856adab7e195dea1af45d93dd6a3f1cVendor (CNA)
Linux Linuxf11e09fe2fc3a11ccdf8f932b68181b0bb1d2078Vendor (CNA)
azl3 kernel 6.6.157.1-1 on Azure Linux 3.06.6.158.1-1 · Release NotesMicrosoft (MSRC)
debian:linux6.1.190-1 · Debian:12Package registry (OSV)
debian:linux6.12.113-1 · Debian:13Package registry (OSV)
debian:linux7.2.8-1 · Debian:14Package registry (OSV)
debian:linux-6.126.12.113-1~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.

  1. Published
  2. Fix recordedsame day
  3. TodayOct 26, 2026+20 d
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).

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.
  • No special conditions are required; it is repeatable.

If successful

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

Weakness class (CWE)

—

CVSS vector

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

nvd-secondary

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. CVSS— → 7.8
  2. Severity— → high
  3. Exploit maturity— → none
  4. Fix✗ → ✓

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

References

Show all references (7 more)

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

All records