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NVD / CVE Program· CNA Linux

CVE-2026-74288: net: fib_rules: Don't dump dying fib_rule in fib_rules_dump().

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: 0.12% (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 0f929b59f4cd0e05bb1ecefe12b77e85911d4be2, 1fbc6c6efe78f4454a51afa0587efb6826f60f00, 2821e85c058f81c9948a2fb1a634f7b47457d51c.

Low priority for now. Upgrade to Linux Linux 0f929b59f4cd0e05bb1ecefe12b77e85911d4be2, 1fbc6c6efe78f4454a51afa0587efb6826f60f00, 2821e85c058f81c9948a2fb1a634f7b47457d51c 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: fib_rules: Don't dump dying fib_rule in fib_rules_dump(). rocker_router_fib_event() calls fib_rule_get() during RCU dump. If the fib_rule is dying, refcount_inc() will complain about it. Let's call refcount_inc_not_zero() in fib_rules_dump().

HighCVSS 7.8 · v3.1—No exploit Fix available
Published
Aug 15, 2026
Updated
Oct 16, 2026
EPSS
0.1% · 2th 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%

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-2026-74288

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

    • 4.12affected
    • 5d7bfd141924a5ece21eb612ad3c56612f041c1e and later · before 0f929b59f4cd0e05bb1ecefe12b77e85911d4be2affected · git
    • 5d7bfd141924a5ece21eb612ad3c56612f041c1e and later · before 4b7ae30c81c2ee10a644749a3704a5c797ccc308affected · git
    • 5d7bfd141924a5ece21eb612ad3c56612f041c1e and later · before 2dfdc210d240bd48bb2ea746430b02b5571b6db9affected · git
    • 5d7bfd141924a5ece21eb612ad3c56612f041c1e and later · before a7ef30753353ba6a95d693b1863a0214222a199aaffected · git
    • 5d7bfd141924a5ece21eb612ad3c56612f041c1e and later · before 1fbc6c6efe78f4454a51afa0587efb6826f60f00affected · git
    • 5d7bfd141924a5ece21eb612ad3c56612f041c1e and later · before bb4a5b3c91af3c8d705bb2e9f6f8069a70db26fcaffected · git
    • 5d7bfd141924a5ece21eb612ad3c56612f041c1e and later · before 3af0bc1bd9039e2e50abf3e2d7fee411f38bce4eaffected · git
    • 5d7bfd141924a5ece21eb612ad3c56612f041c1e and later · before 2821e85c058f81c9948a2fb1a634f7b47457d51caffected · git
    • before 4.12not 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-2026-74283Aug 15, 2026 · tipc: require net admin for TIPCv2 netlink mutators
    31Monitor
  • ← EarlierCVE-2026-74287Aug 15, 2026 · sctp: validate embedded address parameter length
    36Monitor
  • Later →CVE-2026-74289Aug 15, 2026 · ipv4: fib: Don't dump dying fib_info in fib_leaf_notify().
    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 Linux0f929b59f4cd0e05bb1ecefe12b77e85911d4be2Vendor (CNA)
Linux Linux1fbc6c6efe78f4454a51afa0587efb6826f60f00Vendor (CNA)
Linux Linux2821e85c058f81c9948a2fb1a634f7b47457d51cVendor (CNA)
Linux Linux2dfdc210d240bd48bb2ea746430b02b5571b6db9Vendor (CNA)
Linux Linux3af0bc1bd9039e2e50abf3e2d7fee411f38bce4eVendor (CNA)
Linux Linux4b7ae30c81c2ee10a644749a3704a5c797ccc308Vendor (CNA)
Linux Linuxa7ef30753353ba6a95d693b1863a0214222a199aVendor (CNA)
Linux Linuxbb4a5b3c91af3c8d705bb2e9f6f8069a70db26fcVendor (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

  • 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. SSVC exploitation— → none
  2. 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