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NVD / CVE Program· CNA Linux

CVE-2026-74647: misc: fastrpc: Remove buffer from list prior to unmap operation

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 0beaa9bd7eb10d9b5e6352ed5161f3f3bbd4c3c5, 1edb654b2b41baee2ab5cf418baaf6e57dfbd802, 4716c23c206a2f99ca54ebfdd8b5ba9dd0102240.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 0beaa9bd7eb10d9b5e6352ed5161f3f3bbd4c3c5, 1edb654b2b41baee2ab5cf418baaf6e57dfbd802, 4716c23c206a2f99ca54ebfdd8b5ba9dd0102240 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: misc: fastrpc: Remove buffer from list prior to unmap operation fastrpc_req_munmap_impl() is called to unmap any buffer. The buffer is getting removed from the list after it is unmapped from DSP. This can create potential race conditions if multiple threads invoke unmap concurrently, where one thread may remove the entry from the list while another thread's unmap operation is still ongoing. Fix this by removing the buffer entry from the list before calling the unmap operation. If the unmap fails, the entry is re-added to the list so that userspace can retry the unmap, or alternatively, the buffer will be cleaned up during device release when the DSP process is torn down and all DSP-side mappings are freed along with remaining buffers in the list.

HighCVSS 7.8 · v3.1—No exploit Fix available
Published
Aug 22, 2026
Updated
Oct 14, 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%

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.

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  • 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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Follow CVE-2026-74647

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  • when exploit code appears or is weaponized
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  • 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

    • 5.5affected
    • 2419e55e532de14fdf336e09e453aa2831c73a25 and later · before 1edb654b2b41baee2ab5cf418baaf6e57dfbd802affected · git
    • 2419e55e532de14fdf336e09e453aa2831c73a25 and later · before 4716c23c206a2f99ca54ebfdd8b5ba9dd0102240affected · git
    • 2419e55e532de14fdf336e09e453aa2831c73a25 and later · before 99f8de36c84cb9b872157aa6c3578c2480cee4b8affected · git
    • 2419e55e532de14fdf336e09e453aa2831c73a25 and later · before 97273624f7b356eaf8261609a75cfcb8738a165aaffected · git
    • 2419e55e532de14fdf336e09e453aa2831c73a25 and later · before fe70329055977fc1e8dc6291318d0dd75470795aaffected · git
    • 2419e55e532de14fdf336e09e453aa2831c73a25 and later · before 9bf22a7d950cec2d1efeca7f16bb20fcca84c36aaffected · git
    • 2419e55e532de14fdf336e09e453aa2831c73a25 and later · before 0beaa9bd7eb10d9b5e6352ed5161f3f3bbd4c3c5affected · git
    • 2419e55e532de14fdf336e09e453aa2831c73a25 and later · before 6102ceb4eab845743ee57acd3863fbd06e93c927affected · git
    • before 5.5not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.187-16.1.187-1
Debian:12linux-6.12before 6.12.107-1~deb12u16.12.107-1~deb12u1
Debian:13linuxbefore 6.12.105-16.12.105-1
Debian:14linuxbefore 7.1.9-17.1.9-1

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-2026-74645Aug 22, 2026 · mm/damon/lru_sort: error out for >10000 active_mem_bp
    0Monitor
  • ← EarlierCVE-2026-74646Aug 22, 2026 · misc: fastrpc: take fl->lock when moving mmaps on interrupted invoke
    31Monitor
  • Later →CVE-2026-74648Aug 22, 2026 · staging: rtl8723bs: validate monitor transmit frame lengths
    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 Linux0beaa9bd7eb10d9b5e6352ed5161f3f3bbd4c3c5Vendor (CNA)
Linux Linux1edb654b2b41baee2ab5cf418baaf6e57dfbd802Vendor (CNA)
Linux Linux4716c23c206a2f99ca54ebfdd8b5ba9dd0102240Vendor (CNA)
Linux Linux6102ceb4eab845743ee57acd3863fbd06e93c927Vendor (CNA)
Linux Linux97273624f7b356eaf8261609a75cfcb8738a165aVendor (CNA)
Linux Linux99f8de36c84cb9b872157aa6c3578c2480cee4b8Vendor (CNA)
Linux Linux9bf22a7d950cec2d1efeca7f16bb20fcca84c36aVendor (CNA)
Linux Linuxfe70329055977fc1e8dc6291318d0dd75470795aVendor (CNA)
debian:linux6.1.187-1 · Debian:12Package registry (OSV)
debian:linux-6.126.12.107-1~deb12u1 · 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).

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)

—

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