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NVD / CVE Program· CNA Linux

CVE-2026-74376: md/raid10: reset read_slot when reusing r10bio for discard

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: 0.50% (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.
  • According to CISA the attack is automatable: targets can be found by mass scanning.
  • Fixed version: Linux Linux 3cb2a606ce4902eceabe68338df0653312f861f8, 561c9711e4f545d6464a023168bdee03b00fa945, 6b8a26af065ddc93de2aa5c9f0df98dce9723442.

Low priority for now. Upgrade to Linux Linux 3cb2a606ce4902eceabe68338df0653312f861f8, 561c9711e4f545d6464a023168bdee03b00fa945, 6b8a26af065ddc93de2aa5c9f0df98dce9723442 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/raid10: reset read_slot when reusing r10bio for discard put_all_bios() always drops devs[i].bio, but it only drops devs[i].repl_bio when r10_bio->read_slot < 0. If discard reuses an r10bio that was previously used for a read, read_slot can still be non-negative, and discard cleanup can skip bio_put() on repl_bio. Reset read_slot to -1 when preparing an r10bio for discard so the replacement bio is always released correctly.

CriticalCVSS 9.8 · v3.1—No exploit Fix available
Published
Aug 15, 2026
Updated
Oct 16, 2026
EPSS
0.5% · 43th percentile
CWE
—

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 · 0.5%

CISA SSVC decision

Exploitation
none
Automatable
yes
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

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

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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

    • 5.13affected
    • d30588b2731fb01e1616cf16c3fe79a1443e29aa and later · before 3cb2a606ce4902eceabe68338df0653312f861f8affected · git
    • d30588b2731fb01e1616cf16c3fe79a1443e29aa and later · before 561c9711e4f545d6464a023168bdee03b00fa945affected · git
    • d30588b2731fb01e1616cf16c3fe79a1443e29aa and later · before ce3030e92f14362880055de5fe3c258971118853affected · git
    • d30588b2731fb01e1616cf16c3fe79a1443e29aa and later · before 742e4afd247d9c972695227716b03d432a7e1d26affected · git
    • d30588b2731fb01e1616cf16c3fe79a1443e29aa and later · before b7313f23ea5a79b199a007bfad64a866cc2c22e7affected · git
    • d30588b2731fb01e1616cf16c3fe79a1443e29aa and later · before eb04e3e9c14ed15914f5fd2eae8b6435f54f095faffected · git
    • d30588b2731fb01e1616cf16c3fe79a1443e29aa and later · before 6b8a26af065ddc93de2aa5c9f0df98dce9723442affected · git
    • before 5.13not affected · semver
    • 5.15.212 and later · up to and including 5.15.*not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.180-16.1.180-1
Debian:13linuxbefore 6.12.100-16.12.100-1
Debian:14linuxbefore 7.1.5-17.1.5-1

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-2026-74374Aug 15, 2026 · md/raid1,raid10: fix error-path detection with md_cloned_bio()
    30Monitor
  • ← EarlierCVE-2026-74375Aug 15, 2026 · md/raid1,raid10: fix deadlock in read error recovery path
    0Monitor
  • Later →CVE-2026-74377Aug 15, 2026 · RDMA/rxe: Copy WQE to local buffer in non-SRQ receive path
    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 Linux3cb2a606ce4902eceabe68338df0653312f861f8Vendor (CNA)
Linux Linux561c9711e4f545d6464a023168bdee03b00fa945Vendor (CNA)
Linux Linux6b8a26af065ddc93de2aa5c9f0df98dce9723442Vendor (CNA)
Linux Linux742e4afd247d9c972695227716b03d432a7e1d26Vendor (CNA)
Linux Linuxb7313f23ea5a79b199a007bfad64a866cc2c22e7Vendor (CNA)
Linux Linuxce3030e92f14362880055de5fe3c258971118853Vendor (CNA)
Linux Linuxeb04e3e9c14ed15914f5fd2eae8b6435f54f095fVendor (CNA)
debian:linux6.1.180-1 · 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.

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

  • 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)

—

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

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

References

Show all references (6 more)

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

All records