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CVE-2026-93262· NVD / CVE Program· CNA Linux

md/raid5-ppl: fix use-after-free in ppl_do_flush()

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: 0.14% (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 371f7a1b392edc8b7cf449cc7713179b588f2d0e, 455b56209f9615c3902dcc398dd867abb5ade3ab, 8914c3d40870f16429a326e97e4016bedc6ede4c; azl3 kernel 6.6.150.1-1 on Azure Linux 3.0 6.6.157.1-1.

Low priority for now. Upgrade to Linux Linux 371f7a1b392edc8b7cf449cc7713179b588f2d0e, 455b56209f9615c3902dcc398dd867abb5ade3ab, 8914c3d40870f16429a326e97e4016bedc6ede4c; azl3 kernel 6.6.150.1-1 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: md/raid5-ppl: fix use-after-free in ppl_do_flush() The loop in ppl_do_flush() continues iterating after calling ppl_io_unit_finished(), touching io->pending_flushes and leading to a use-after-free. Add a break statement to stop the loop once io is freed.

HighCVSS 7.8 · v3.1—No exploit Fix available
Published
Sep 24, 2026
Updated
Oct 19, 2026
EPSS
0.1% · 3th 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.

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

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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.

—

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

    • 4.16affected
    • 1532d9e87e8b2377f12929f9e40724d5fbe6ecc5 and later · before cf01f9413565e86673baf927291a088b6975692baffected · git
    • 1532d9e87e8b2377f12929f9e40724d5fbe6ecc5 and later · before e7505842f1329ece90cb9ea0db87772aeca44052affected · git
    • 1532d9e87e8b2377f12929f9e40724d5fbe6ecc5 and later · before b5123bf667ac29ddd8106f9ca7cc01316513ae66affected · git
    • 1532d9e87e8b2377f12929f9e40724d5fbe6ecc5 and later · before e77c80670f2c2bf491da9b173931e1da4677c23aaffected · git
    • 1532d9e87e8b2377f12929f9e40724d5fbe6ecc5 and later · before 8914c3d40870f16429a326e97e4016bedc6ede4caffected · git
    • 1532d9e87e8b2377f12929f9e40724d5fbe6ecc5 and later · before 455b56209f9615c3902dcc398dd867abb5ade3abaffected · git
    • 1532d9e87e8b2377f12929f9e40724d5fbe6ecc5 and later · before fcf21df7d3c50c8ebeb0757df5d21b02dcae4218affected · git
    • 1532d9e87e8b2377f12929f9e40724d5fbe6ecc5 and later · before 371f7a1b392edc8b7cf449cc7713179b588f2d0eaffected · git
    • before 4.16not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
AlmaLinux:8bpftoolbefore 4.18.0-553.174.1.el8_104.18.0-553.174.1.el8_10
AlmaLinux:8kernelbefore 4.18.0-553.174.1.el8_104.18.0-553.174.1.el8_10
AlmaLinux:8kernel-abi-stablelistsbefore 4.18.0-553.174.1.el8_104.18.0-553.174.1.el8_10
AlmaLinux:8kernel-corebefore 4.18.0-553.174.1.el8_104.18.0-553.174.1.el8_10
AlmaLinux:8kernel-cross-headersbefore 4.18.0-553.174.1.el8_104.18.0-553.174.1.el8_10
AlmaLinux:8kernel-debugbefore 4.18.0-553.174.1.el8_104.18.0-553.174.1.el8_10
AlmaLinux:8kernel-debug-corebefore 4.18.0-553.174.1.el8_104.18.0-553.174.1.el8_10
AlmaLinux:8kernel-debug-develbefore 4.18.0-553.174.1.el8_104.18.0-553.174.1.el8_10
AlmaLinux:8kernel-debug-modulesbefore 4.18.0-553.174.1.el8_104.18.0-553.174.1.el8_10
AlmaLinux:8kernel-debug-modules-extrabefore 4.18.0-553.174.1.el8_104.18.0-553.174.1.el8_10
AlmaLinux:8kernel-develbefore 4.18.0-553.174.1.el8_104.18.0-553.174.1.el8_10
AlmaLinux:8kernel-docbefore 4.18.0-553.174.1.el8_104.18.0-553.174.1.el8_10
AlmaLinux:8kernel-headersbefore 4.18.0-553.174.1.el8_104.18.0-553.174.1.el8_10
AlmaLinux:8kernel-modulesbefore 4.18.0-553.174.1.el8_104.18.0-553.174.1.el8_10
AlmaLinux:8kernel-modules-extrabefore 4.18.0-553.174.1.el8_104.18.0-553.174.1.el8_10
AlmaLinux:8kernel-rtbefore 4.18.0-553.174.1.rt7.515.el8_104.18.0-553.174.1.rt7.515.el8_10
AlmaLinux:8kernel-rt-corebefore 4.18.0-553.174.1.rt7.515.el8_104.18.0-553.174.1.rt7.515.el8_10
AlmaLinux:8kernel-rt-debugbefore 4.18.0-553.174.1.rt7.515.el8_104.18.0-553.174.1.rt7.515.el8_10
AlmaLinux:8kernel-rt-debug-corebefore 4.18.0-553.174.1.rt7.515.el8_104.18.0-553.174.1.rt7.515.el8_10
AlmaLinux:8kernel-rt-debug-develbefore 4.18.0-553.174.1.rt7.515.el8_104.18.0-553.174.1.rt7.515.el8_10
AlmaLinux:8kernel-rt-debug-modulesbefore 4.18.0-553.174.1.rt7.515.el8_104.18.0-553.174.1.rt7.515.el8_10
AlmaLinux:8kernel-rt-debug-modules-extrabefore 4.18.0-553.174.1.rt7.515.el8_104.18.0-553.174.1.rt7.515.el8_10
AlmaLinux:8kernel-rt-develbefore 4.18.0-553.174.1.rt7.515.el8_104.18.0-553.174.1.rt7.515.el8_10
AlmaLinux:8kernel-rt-modulesbefore 4.18.0-553.174.1.rt7.515.el8_104.18.0-553.174.1.rt7.515.el8_10

+67

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-2026-93260Sep 24, 2026 · powerpc/xive: propagate IPI init errors to prevent use-after-free
    29Monitor
  • ← EarlierCVE-2026-93261Sep 24, 2026 · locking/lockdep: Fix NULL pointer dereference in __lock_set_class()
    0Monitor
  • Later →CVE-2026-93263Sep 24, 2026 · clk: eswin: Zero-initialize stack-allocated clk_init_data
    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 Linux371f7a1b392edc8b7cf449cc7713179b588f2d0eVendor (CNA)
Linux Linux455b56209f9615c3902dcc398dd867abb5ade3abVendor (CNA)
Linux Linux8914c3d40870f16429a326e97e4016bedc6ede4cVendor (CNA)
Linux Linuxb5123bf667ac29ddd8106f9ca7cc01316513ae66Vendor (CNA)
Linux Linuxcf01f9413565e86673baf927291a088b6975692bVendor (CNA)
Linux Linuxe7505842f1329ece90cb9ea0db87772aeca44052Vendor (CNA)
Linux Linuxe77c80670f2c2bf491da9b173931e1da4677c23aVendor (CNA)
Linux Linuxfcf21df7d3c50c8ebeb0757df5d21b02dcae4218Vendor (CNA)
azl3 kernel 6.6.150.1-1 on Azure Linux 3.06.6.157.1-1 · Release NotesMicrosoft (MSRC)
almalinux:bpftool4.18.0-553.174.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel4.18.0-553.174.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-abi-stablelists4.18.0-553.174.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-core4.18.0-553.174.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-cross-headers4.18.0-553.174.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-debug4.18.0-553.174.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-debug-core4.18.0-553.174.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-debug-devel4.18.0-553.174.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-debug-modules4.18.0-553.174.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-debug-modules-extra4.18.0-553.174.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-devel4.18.0-553.174.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-doc4.18.0-553.174.1.el8_10 · AlmaLinux:8Package registry (OSV)
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)
opensuse:kernel-source7.2.9-1.1 · openSUSE:TumbleweedPackage registry (OSV)
red hat:bpftool0:4.18.0-553.174.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:bpftool-debuginfo0:4.18.0-553.174.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel0:4.18.0-553.174.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-abi-stablelists0:4.18.0-553.174.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-core0:4.18.0-553.174.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)

+9

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

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. 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