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NVD / CVE Program· CNA Linux

CVE-2026-53355: net: rds: clear i_sends on setup unwind

Noroxi assessment

Priority: Monitor (action score 39/100)

  • 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: 0.42% (FIRST EPSS).
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 1d4ec754ee3871f7e3670c67bb0298c9c5760926, 20cf0fb715c41111469577e85e35d15f099473e0, 27040bbca289a704eafcacca167d310c6ce2b1bc; azl3 kernel 6.6.139.1-1 on Azure Linux 3.0 6.6.143.1-1.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 1d4ec754ee3871f7e3670c67bb0298c9c5760926, 20cf0fb715c41111469577e85e35d15f099473e0, 27040bbca289a704eafcacca167d310c6ce2b1bc; azl3 kernel 6.6.139.1-1 on Azure Linux 3.0 6.6.143.1-1 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: net: rds: clear i_sends on setup unwind The RDS IB connection teardown path is written so it can run during partial startup and on repeated shutdown attempts. It uses NULL pointers to distinguish resources that are still owned from resources that have already been released. When rds_ib_setup_qp() fails after allocating i_sends but before allocating i_recvs, the sends_out path frees i_sends without clearing the pointer. A later shutdown pass can still treat that stale pointer as a live send ring allocation. Clear i_sends after vfree() in the error unwind path so the existing shutdown logic continues to use the correct ownership state.

CriticalCVSS 9.8 · v3.1—No exploit Fix available
Published
Jul 1, 2026
Updated
Aug 5, 2026
EPSS
0.4% · 36th percentile

Report tools

JSON

Action score

39

Monitor

Low priority for now.

CVSS
39 / 40 · 9.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.4%

CNA vs NVD score

NVD
—
CNA · Linux
9.8
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.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-53355

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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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.

VendorProduct
linuxlinux kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernel3.18.74 and later · before 3.19
  • linux linux kernel4.1.46 and later · before 4.2
  • linux linux kernel4.4.91 and later · before 4.5
  • linux linux kernel4.9.54 and later · before 4.10
  • linux linux kernel4.11.1 and later · before 5.10.259
  • linux linux kernel5.11 and later · before 5.15.210
  • linux linux kernel5.16 and later · before 6.1.176
  • linux linux kernel6.2 and later · before 6.6.143
  • linux linux kernel6.7 and later · before 6.12.94
  • linux linux kernel6.13 and later · before 6.18.36
  • linux linux kernel6.19 and later · before 7.0.13
  • linux linux kernel4.11
  • linux linux kernel7.1

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

    • 75a12b2fa80c2e4cc40a9f9305f95899850b7426, c9459693fae9a1bf3f51f3db98617f694112e897, 13099ee9c7d54b0a25f6c8397675aed99e9cfa45, 5c6712ab4efb6cf60e16719ab6bcaface9cc268c, 4.11affected
    • 3b12f73a5c2977153f28a224392fd4729b50d1dc and later · before 66cccec111421a10efdc2c74499d15b93e7acae5affected · git
    • 3b12f73a5c2977153f28a224392fd4729b50d1dc and later · before 2c5e5e4a5970c41f16e3ad801a78719ed5d5c71baffected · git
    • 3b12f73a5c2977153f28a224392fd4729b50d1dc and later · before 29d940026dce39e3018dab6f67c9427249321270affected · git
    • 3b12f73a5c2977153f28a224392fd4729b50d1dc and later · before e7cf30aa5f1fc6c2a86df65df8b731df20e44d79affected · git
    • 3b12f73a5c2977153f28a224392fd4729b50d1dc and later · before f16ad421a4e3e7db2d14bdf3b16f583bc4f3b30aaffected · git
    • 3b12f73a5c2977153f28a224392fd4729b50d1dc and later · before 1d4ec754ee3871f7e3670c67bb0298c9c5760926affected · git
    • 3b12f73a5c2977153f28a224392fd4729b50d1dc and later · before 27040bbca289a704eafcacca167d310c6ce2b1bcaffected · git
    • 3b12f73a5c2977153f28a224392fd4729b50d1dc and later · before 20cf0fb715c41111469577e85e35d15f099473e0affected · git
    • 3.18.74 and later · before 3.19affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.176-16.1.176-1
Debian:13linuxbefore 6.12.94-16.12.94-1
Debian:14linuxbefore 7.0.13-17.0.13-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now

Published before and after this one in the same product

  • ← EarlierCVE-2026-53346Jul 1, 2026 · rust: arm64: set uwtable llvm module flag for CONFIG_UNWIND_TABLES
    28Monitor
  • ← EarlierCVE-2026-53351Jul 1, 2026 · riscv/ptrace: Use USER_REGSET_NOTE_TYPE for REGSET_CFI
    22Monitor
  • Later →CVE-2026-53327Jul 1, 2026 · debugobjects: Do not fill_pool() if pi_blocked_on
    22Monitor

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 Linux1d4ec754ee3871f7e3670c67bb0298c9c5760926Vendor (CNA)
Linux Linux20cf0fb715c41111469577e85e35d15f099473e0Vendor (CNA)
Linux Linux27040bbca289a704eafcacca167d310c6ce2b1bcVendor (CNA)
Linux Linux29d940026dce39e3018dab6f67c9427249321270Vendor (CNA)
Linux Linux2c5e5e4a5970c41f16e3ad801a78719ed5d5c71bVendor (CNA)
Linux Linux3.19Vendor (CNA)
Linux Linux4.10Vendor (CNA)
Linux Linux4.2Vendor (CNA)
Linux Linux4.5Vendor (CNA)
Linux Linux66cccec111421a10efdc2c74499d15b93e7acae5Vendor (CNA)
Linux Linuxe7cf30aa5f1fc6c2a86df65df8b731df20e44d79Vendor (CNA)
Linux Linuxf16ad421a4e3e7db2d14bdf3b16f583bc4f3b30aVendor (CNA)
azl3 kernel 6.6.139.1-1 on Azure Linux 3.06.6.143.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
debian:linux6.1.176-1 · 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.

No history yet (it accumulates with the daily EPSS job).

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

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • 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
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-476 · NULL Pointer Dereference

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/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. 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