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NVD / CVE Program· CNA Linux

CVE-2026-64565: Input: ims-pcu - fix heap-buffer-overflow in ims_pcu_process_data()

Noroxi assessment

Priority: Monitor (action score 0/100)

  • 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: 0.18% (FIRST EPSS).
  • Fixed version: Linux Linux 06cfff93fd40441292567b999091beab11c74504, 3a801bc75ba1d121d0ed60e7234f93ba5651d87d, 40bbbf2e91fd60715525bf0405c67876af817edf; azl3 kernel 6.6.145.2-1 on Azure Linux 3.0 6.6.150.1-1.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 06cfff93fd40441292567b999091beab11c74504, 3a801bc75ba1d121d0ed60e7234f93ba5651d87d, 40bbbf2e91fd60715525bf0405c67876af817edf; azl3 kernel 6.6.145.2-1 on Azure Linux 3.0 6.6.150.1-1 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: Input: ims-pcu - fix heap-buffer-overflow in ims_pcu_process_data() The `ims_pcu_process_data()` processes incoming URB data byte by byte. However, it fails to check if the `read_pos` index exceeds IMS_PCU_BUF_SIZE. If a malicious USB device sends a packet larger than IMS_PCU_BUF_SIZE, `read_pos` will increment indefinitely. Moreover, since `read_pos` is located immediately after `read_buf`, the attacker can overwrite `read_pos` itself to arbitrarily control the index. This manipulated `read_pos` is subsequently used in `ims_pcu_handle_response()` to copy data into `cmd_buf`, leading to a heap buffer overflow. Specifically, an attacker can overwrite the `cmd_done.wait.head` located at offset 136 relative to `cmd_buf` in the `ims_pcu_handle_response()`. Consequently, when the driver calls `complete(&pcu->cmd_done)`, it triggers a control flow hijack by using the manipulated pointer. Fix this by adding a bounds check for `read_pos` before writing to `read_buf`. If the packet is too long, discard it, log a warning, and reset the parser state. [dtor: factor out resetting packet state, reset checksum as well]

—No exploit Fix available
Published
Aug 4, 2026
Updated
Oct 23, 2026
EPSS
0.1% · 7th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

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Noroxi analysis

What does it mean in your environment?

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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

    • 3.10affected
    • 628329d52474323938a03826941e166bc7c8eff4 and later · before 06cfff93fd40441292567b999091beab11c74504affected · git
    • 628329d52474323938a03826941e166bc7c8eff4 and later · before 992a7173364dcf63e30012af43da3c2f279839f9affected · git
    • 628329d52474323938a03826941e166bc7c8eff4 and later · before 3a801bc75ba1d121d0ed60e7234f93ba5651d87daffected · git
    • 628329d52474323938a03826941e166bc7c8eff4 and later · before 40bbbf2e91fd60715525bf0405c67876af817edfaffected · git
    • 628329d52474323938a03826941e166bc7c8eff4 and later · before ca9f8c09845fb8c51b6d447f6428eecd1b8b0a49affected · git
    • 628329d52474323938a03826941e166bc7c8eff4 and later · before d03a740e087de7dcb2a26dc1123377bd3d1d84caaffected · git
    • 628329d52474323938a03826941e166bc7c8eff4 and later · before 875115b82c295277b81b6dfee7debc725f44e854affected · git
    • before 3.10not affected · semver
    • 5.10.265 and later · up to and including 5.10.*not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.187-16.1.187-1
Debian:12linux-6.12before 6.12.101-1~deb12u16.12.101-1~deb12u1
Debian:13linuxbefore 6.12.101-16.12.101-1
Debian:14linuxbefore 7.1.3-17.1.3-1

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-2026-64563Aug 4, 2026 · rhashtable: clear stale iter->p on table restart
    31Monitor
  • ← EarlierCVE-2026-64564Aug 4, 2026 · sctp: don't free the ASCONF's own transport in DEL-IP processing
    39Monitor
  • Later →CVE-2026-64566Aug 5, 2026 · xfrm: iptfs: propagate SKBFL_SHARED_FRAG in iptfs_skb_add_frags()
    39Monitor

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 Linux06cfff93fd40441292567b999091beab11c74504Vendor (CNA)
Linux Linux3a801bc75ba1d121d0ed60e7234f93ba5651d87dVendor (CNA)
Linux Linux40bbbf2e91fd60715525bf0405c67876af817edfVendor (CNA)
Linux Linux875115b82c295277b81b6dfee7debc725f44e854Vendor (CNA)
Linux Linux992a7173364dcf63e30012af43da3c2f279839f9Vendor (CNA)
Linux Linuxca9f8c09845fb8c51b6d447f6428eecd1b8b0a49Vendor (CNA)
Linux Linuxd03a740e087de7dcb2a26dc1123377bd3d1d84caVendor (CNA)
azl3 kernel 6.6.145.2-1 on Azure Linux 3.06.6.150.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
debian:linux6.1.187-1 · Debian:12Package registry (OSV)
debian:linux-6.126.12.101-1~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

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

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 (6 more)

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

All records