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NVD / CVE Program· CNA Linux

CVE-2026-90218: RDMA/cma: Fix WARNING in res_to_rt

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 1d7e55ea64dd15769318ba2e0fe0956db82ba3c3, 2a63cb9ea862ac7d947952b497eef6520853538c, 39e83bb77fc92344cd62a373b311f096d812e548; azl3 kernel 6.6.152.1-1 on Azure Linux 3.0 6.6.157.1-1.

Low priority for now. Upgrade to Linux Linux 1d7e55ea64dd15769318ba2e0fe0956db82ba3c3, 2a63cb9ea862ac7d947952b497eef6520853538c, 39e83bb77fc92344cd62a373b311f096d812e548; 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: RDMA/cma: Fix WARNING in res_to_rt syzbot reported a WARN_ON(!res->dev) in res_to_rt() triggered via addr_handler() during asynchronous address resolution: " WARNING: drivers/infiniband/core/restrack.c:138 at res_to_rt+0x1c4/0x230 CPU#1: kworker/u8:4/59 Modules linked in: CPU: 1 UID: 0 PID: 59 Comm: kworker/u8:4 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Compute Engine, BIOS Google 07/24/2026 Workqueue: ib_addr process_one_req RIP: 0010:res_to_rt+0x1c4/0x230 drivers/infiniband/core/restrack.c:138 RSP: 0018:ffffc9000201f850 EFLAGS: 00010293 RAX: ffffffff88d00ce5 RBX: ffff88807f0fd4f8 RCX: ffff88801e6e0000 RDX: 0000000000000000 RSI: ffffffff8fd996f0 RDI: 0000000000000003 RBP: 0000000000000000 R08: ffff88801e6e0000 R09: 000000000000000a R10: 0000000000000009 R11: 0000000000000000 R12: dffffc0000000000 R13: 1ffff1100fe1fa9f R14: 0000000000000000 R15: 0000000000000003 FS: 0000000000000000(0000) GS:ffff888125012000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00001d559c3d2000 CR3: 0000000077c4c000 CR4: 00000000003526f0 Call Trace: <TASK> rdma_restrack_add+0x5a/0x8a0 drivers/infiniband/core/restrack.c:236 addr_handler+0x41a/0x5a0 drivers/infiniband/core/cma.c:3534 process_one_req+0x2eb/0x540 drivers/infiniband/core/addr.c:624 process_one_work kernel/workqueue.c:3375 [inline] process_scheduled_works+0xc4e/0x1630 kernel/workqueue.c:3458 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3539 kthread+0x388/0x470 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 </TASK> " In addr_handler(), cma_acquire_dev_by_src_ip() is called to populate id_priv->cma_dev and bind the associated ib_device to id_priv->id.device. If cma_acquire_dev_by_src_ip() returns an error (non-zero status), the ID remains unassociated with any RDMA device. Previously, rdma_restrack_add(&id_priv->res) was invoked unconditionally even when cma_acquire_dev_by_src_ip() failed, passing a resource with a NULL dev pointer and triggering the WARN_ON assertion in res_to_rt(). Fix this by only adding the resource to restrack when acquiring the device succeeds.

—No exploit Fix available
Published
Sep 17, 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

    • 073fdf539d4c022162db3d77a5afca1710f0de2d, fa37a461bd6d9ee86e891ba3e4074a450e44c881, 5.13affected
    • c5ebaca402f5c5bd61ac8316feb2aa3a0be4d4a8 and later · before 1d7e55ea64dd15769318ba2e0fe0956db82ba3c3affected · git
    • cb5cd0ea4eb3ce338a593a5331ddb4986ae20faa and later · before 39e83bb77fc92344cd62a373b311f096d812e548affected · git
    • cb5cd0ea4eb3ce338a593a5331ddb4986ae20faa and later · before 9c80273d663959504957606b9a24fe901ee2a4a1affected · git
    • cb5cd0ea4eb3ce338a593a5331ddb4986ae20faa and later · before 2a63cb9ea862ac7d947952b497eef6520853538caffected · git
    • cb5cd0ea4eb3ce338a593a5331ddb4986ae20faa and later · before f72957e0b31f2962f4c1089a9223f1206aa26983affected · git
    • cb5cd0ea4eb3ce338a593a5331ddb4986ae20faa and later · before 544e40805dbb6cfe64916bd4c8b238fec585ac2aaffected · git
    • cb5cd0ea4eb3ce338a593a5331ddb4986ae20faa and later · before 64a2bd4cfc16c24f0a0e6321a2fd00ffde3e0a5baffected · git
    • cb5cd0ea4eb3ce338a593a5331ddb4986ae20faa and later · before c6d1ec4fbe56492bb88987d577f04a5fb6955f26affected · git
    • 5.10.37 and later · before 5.10.270affected · 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-2026-90216Sep 17, 2026 · ubi: Fix rollback for explicit UBI device numbers
    0Monitor
  • ← EarlierCVE-2026-90217Sep 17, 2026 · bpf: Compare iterator types during state pruning
    31Monitor
  • Later →CVE-2026-90219Sep 17, 2026 · RDMA/cxgb4: Free debugfs on registration failure
    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 Linux1d7e55ea64dd15769318ba2e0fe0956db82ba3c3Vendor (CNA)
Linux Linux2a63cb9ea862ac7d947952b497eef6520853538cVendor (CNA)
Linux Linux39e83bb77fc92344cd62a373b311f096d812e548Vendor (CNA)
Linux Linux5.10.270Vendor (CNA)
Linux Linux5.12Vendor (CNA)
Linux Linux5.13Vendor (CNA)
Linux Linux544e40805dbb6cfe64916bd4c8b238fec585ac2aVendor (CNA)
Linux Linux64a2bd4cfc16c24f0a0e6321a2fd00ffde3e0a5bVendor (CNA)
Linux Linux9c80273d663959504957606b9a24fe901ee2a4a1Vendor (CNA)
Linux Linuxc6d1ec4fbe56492bb88987d577f04a5fb6955f26Vendor (CNA)
Linux Linuxf72957e0b31f2962f4c1089a9223f1206aa26983Vendor (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).

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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