Skip to content
Noroxi
CVE-2026-53009· NVD / CVE Program· CNA Linux

ice: fix double-free of tx_buf skb

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: 0.13% (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 1a303baa715e6b78d6a406aaf335f87ff35acfcd, 359906450690a1d70545220bde82ba74f3fd80f8, 4c08fc2119ef0281cfa2cee007acf0a251be55f2; azl3 kernel 6.6.152.1-1 on Azure Linux 3.0 Release Notes; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 Release Notes.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 1a303baa715e6b78d6a406aaf335f87ff35acfcd, 359906450690a1d70545220bde82ba74f3fd80f8, 4c08fc2119ef0281cfa2cee007acf0a251be55f2; azl3 kernel 6.6.152.1-1 on Azure Linux 3.0 Release Notes; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 Release Notes 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: ice: fix double-free of tx_buf skb If ice_tso() or ice_tx_csum() fail, the error path in ice_xmit_frame_ring() frees the skb, but the 'first' tx_buf still points to it and is marked as valid (ICE_TX_BUF_SKB). 'next_to_use' remains unchanged, so the potential problem will likely fix itself when the next packet is transmitted and the tx_buf gets overwritten. But if there is no next packet and the interface is brought down instead, ice_clean_tx_ring() -> ice_unmap_and_free_tx_buf() will find the tx_buf and free the skb for the second time. The fix is to reset the tx_buf type to ICE_TX_BUF_EMPTY in the error path, so that ice_unmap_and_free_tx_buf(). Move the initialization of 'first' up, to ensure it's already valid in case we hit the linearization error path. The bug was spotted by AI while I had it looking for something else. It also proposed an initial version of the patch. I reproduced the bug and tested the fix by adding code to inject failures, on a build with KASAN. I looked for similar bugs in related Intel drivers and did not find any.

HighCVSS 7.8 · v3.1—No exploit Fix available
Published
Jun 24, 2026
Updated
Oct 21, 2026
EPSS
0.1% · 2th percentile

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%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

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.

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-2026-53009

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

One daily email digest (06:00 UTC); connect a webhook for KEV listings and weaponized exploits instantly.

Your free account also gets you

Running WordPress? Scan your site free with WP Lens

  • Stack alerts: add the products and versions you run, get the new CVEs that affect them
  • Uptime monitoring: 1 site, instant email when it goes down
  • Add your domain: subdomains and takeover risk scanned every week (1 domain)
  • 10 scans an hour on the security tools (3 a day without an account), an API key and MCP
  • All your scans in one panel: findings, what changed in the last scan, a report per domain or per client (PDF, share link)
All free tools

Sign up with email · Have an account? Sign in

Free account, no card. Unfollow any time.

Don't want an account? Get "Exploited this week" by email every MondayDon't want an account? RSS feed for linux records

Running WordPress? Scan your site free with WP Lens

Is your version affected? Check it

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.

We use this product, ask for help

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
redhatenterprise linux

Affected versions

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

  • linux linux kernel4.17 and later · before 7.0.10
  • redhat enterprise linux10.0
  • redhat enterprise linux7.0
  • redhat enterprise linux8.0
  • redhat enterprise linux9.0

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

    • 4.17affected
    • d76a60ba7afb89523c88cf2ed3a044ce4180289e and later · before 359906450690a1d70545220bde82ba74f3fd80f8affected · git
    • d76a60ba7afb89523c88cf2ed3a044ce4180289e and later · before eb6cf492ae991e40e1e5b2d3f32ec06e9cc678dbaffected · git
    • d76a60ba7afb89523c88cf2ed3a044ce4180289e and later · before 910e498613d5bf4cbe5f298c2613666c38679fabaffected · git
    • d76a60ba7afb89523c88cf2ed3a044ce4180289e and later · before 4c08fc2119ef0281cfa2cee007acf0a251be55f2affected · git
    • d76a60ba7afb89523c88cf2ed3a044ce4180289e and later · before 1a303baa715e6b78d6a406aaf335f87ff35acfcdaffected · git
    • before 4.17not affected · semver
    • 6.6.160 and later · up to and including 6.6.*not affected · semver
    • 6.12.114 and later · up to and including 6.12.*not affected · semver
    • 6.18.57 and later · up to and including 6.18.*not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
AlmaLinux:10kernelbefore 6.12.0-211.37.1.el10_26.12.0-211.37.1.el10_2
AlmaLinux:10kernel-64kbefore 6.12.0-211.37.1.el10_26.12.0-211.37.1.el10_2
AlmaLinux:10kernel-64k-corebefore 6.12.0-211.37.1.el10_26.12.0-211.37.1.el10_2
AlmaLinux:10kernel-64k-debugbefore 6.12.0-211.37.1.el10_26.12.0-211.37.1.el10_2
AlmaLinux:10kernel-64k-debug-corebefore 6.12.0-211.37.1.el10_26.12.0-211.37.1.el10_2
AlmaLinux:10kernel-64k-debug-develbefore 6.12.0-211.37.1.el10_26.12.0-211.37.1.el10_2
AlmaLinux:10kernel-64k-debug-devel-matchedbefore 6.12.0-211.37.1.el10_26.12.0-211.37.1.el10_2
AlmaLinux:10kernel-64k-debug-modulesbefore 6.12.0-211.37.1.el10_26.12.0-211.37.1.el10_2
AlmaLinux:10kernel-64k-debug-modules-corebefore 6.12.0-211.37.1.el10_26.12.0-211.37.1.el10_2
AlmaLinux:10kernel-64k-debug-modules-extrabefore 6.12.0-211.37.1.el10_26.12.0-211.37.1.el10_2
AlmaLinux:10kernel-64k-develbefore 6.12.0-211.37.1.el10_26.12.0-211.37.1.el10_2
AlmaLinux:10kernel-64k-devel-matchedbefore 6.12.0-211.37.1.el10_26.12.0-211.37.1.el10_2
AlmaLinux:10kernel-64k-modulesbefore 6.12.0-211.37.1.el10_26.12.0-211.37.1.el10_2
AlmaLinux:10kernel-64k-modules-corebefore 6.12.0-211.37.1.el10_26.12.0-211.37.1.el10_2
AlmaLinux:10kernel-64k-modules-extrabefore 6.12.0-211.37.1.el10_26.12.0-211.37.1.el10_2
AlmaLinux:10kernel-abi-stablelistsbefore 6.12.0-211.37.1.el10_26.12.0-211.37.1.el10_2
AlmaLinux:10kernel-corebefore 6.12.0-211.37.1.el10_26.12.0-211.37.1.el10_2
AlmaLinux:10kernel-cross-headersbefore 6.12.0-211.37.1.el10_26.12.0-211.37.1.el10_2
AlmaLinux:10kernel-debugbefore 6.12.0-211.37.1.el10_26.12.0-211.37.1.el10_2
AlmaLinux:10kernel-debug-corebefore 6.12.0-211.37.1.el10_26.12.0-211.37.1.el10_2
AlmaLinux:10kernel-debug-develbefore 6.12.0-211.37.1.el10_26.12.0-211.37.1.el10_2
AlmaLinux:10kernel-debug-devel-matchedbefore 6.12.0-211.37.1.el10_26.12.0-211.37.1.el10_2
AlmaLinux:10kernel-debug-modulesbefore 6.12.0-211.37.1.el10_26.12.0-211.37.1.el10_2
AlmaLinux:10kernel-debug-modules-corebefore 6.12.0-211.37.1.el10_26.12.0-211.37.1.el10_2

+96

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • 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
  • CVE-2016-5195Race condition in mm/gup.c in the Linux kernel 2.x through 4.x before 4.8.3 allows local users to gain privileges by leveraging incorrect haKEV
    83Now

Published before and after this one in the same product

  • ← EarlierCVE-2026-53007Jun 24, 2026 · ice: fix potential NULL pointer deref in error path of ice_set_ringparam()
    22Monitor
  • ← EarlierCVE-2026-53008Jun 24, 2026 · ice: fix race condition in TX timestamp ring cleanup
    18Monitor
  • Later →CVE-2026-53011Jun 24, 2026 · net/sched: taprio: fix use-after-free in advance_sched() on schedule switch
    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 Linux1a303baa715e6b78d6a406aaf335f87ff35acfcdVendor (CNA)
Linux Linux359906450690a1d70545220bde82ba74f3fd80f8Vendor (CNA)
Linux Linux4c08fc2119ef0281cfa2cee007acf0a251be55f2Vendor (CNA)
Linux Linux910e498613d5bf4cbe5f298c2613666c38679fabVendor (CNA)
Linux Linuxeb6cf492ae991e40e1e5b2d3f32ec06e9cc678dbVendor (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 3.0Release NotesMicrosoft (MSRC)
azl3 kernel 6.6.157.1-1 on Azure Linux 3.0Release NotesMicrosoft (MSRC)
almalinux:kernel6.12.0-211.37.1.el10_2 · AlmaLinux:10Package registry (OSV)
almalinux:kernel-64k6.12.0-211.37.1.el10_2 · AlmaLinux:10Package registry (OSV)
almalinux:kernel-64k-core6.12.0-211.37.1.el10_2 · AlmaLinux:10Package registry (OSV)
almalinux:kernel-64k-debug6.12.0-211.37.1.el10_2 · AlmaLinux:10Package registry (OSV)
almalinux:kernel-64k-debug-core6.12.0-211.37.1.el10_2 · AlmaLinux:10Package registry (OSV)
almalinux:kernel-64k-debug-devel6.12.0-211.37.1.el10_2 · AlmaLinux:10Package registry (OSV)
almalinux:kernel-64k-debug-devel-matched6.12.0-211.37.1.el10_2 · AlmaLinux:10Package registry (OSV)
almalinux:kernel-64k-debug-modules6.12.0-211.37.1.el10_2 · AlmaLinux:10Package registry (OSV)
almalinux:kernel-64k-debug-modules-core6.12.0-211.37.1.el10_2 · AlmaLinux:10Package registry (OSV)
almalinux:kernel-64k-debug-modules-extra6.12.0-211.37.1.el10_2 · AlmaLinux:10Package registry (OSV)
almalinux:kernel-64k-devel6.12.0-211.37.1.el10_2 · AlmaLinux:10Package registry (OSV)
almalinux:kernel-64k-devel-matched6.12.0-211.37.1.el10_2 · AlmaLinux:10Package registry (OSV)
debian:linux7.0.10-1 · Debian:14Package registry (OSV)
red hat:kernel-64k-debug-debuginfo0:6.12.0-211.37.1.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:kernel-64k-debug-devel0:6.12.0-211.37.1.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:kernel-64k-debug-devel-matched0:6.12.0-211.37.1.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:kernel-64k-debuginfo0:6.12.0-211.37.1.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:kernel-64k-devel0:6.12.0-211.37.1.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:kernel-64k-devel-matched0:6.12.0-211.37.1.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:kernel-debug-debuginfo0:6.12.0-211.37.1.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:kernel-debug-devel0:6.12.0-211.37.1.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:kernel-debug-devel-matched0:6.12.0-211.37.1.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)

+5

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.

  • CVE-2026-529930 days aparttipc: fix double-free in tipc_buf_append()
    39Monitor
  • CVE-2026-6438331 days apartsmb: client: fix double-free in SMB2_flush() replay
    39Monitor
  • CVE-2026-6438431 days apartsmb: client: fix change notify replay double-free
    39Monitor
  • CVE-2026-6438531 days apartsmb: client: fix double-free in SMB2_ioctl() replay
    39Monitor
  • CVE-2026-6438631 days apartsmb: client: fix query_info() replay double-free
    39Monitor
  • CVE-2026-6438731 days apartsmb: client: fix query directory replay double-free
    39Monitor

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

  • 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)

CWE-415 · Double Free

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. SSVC exploitation— → none
  2. Fix✗ → ✓

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

References

Show all references (12 more)

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

All records