NVD / CVE Program· CNA Linux

CVE-2025-21780: drm/amdgpu: avoid buffer overflow attach in smu_sys_set_pp_table()

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: 0.26% (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 1abb2648698bf10783d2236a6b4a7ca5e8021699, 231075c5a8ea54f34b7c4794687baa980814e6de, 2498d2db1d35e88a2060ea191ae75dce853dd084; azl3 kernel 6.6.78.1-3 on Azure Linux 3.0 6.6.79.1-1; azl3 kernel 6.6.79.1-1 on Azure Linux 3.0 6.6.79.1-1.

Low priority for now. Upgrade to Linux Linux 1abb2648698bf10783d2236a6b4a7ca5e8021699, 231075c5a8ea54f34b7c4794687baa980814e6de, 2498d2db1d35e88a2060ea191ae75dce853dd084; azl3 kernel 6.6.78.1-3 on Azure Linux 3.0 6.6.79.1-1; azl3 kernel 6.6.79.1-1 on Azure Linux 3.0 6.6.79.1-1 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: drm/amdgpu: avoid buffer overflow attach in smu_sys_set_pp_table() It malicious user provides a small pptable through sysfs and then a bigger pptable, it may cause buffer overflow attack in function smu_sys_set_pp_table().

HighCVSS 7.8 · v3.1—No exploit Fix available

Memory safety

BDU:2025-11842

Published: Feb 27, 2025
Updated: Oct 15, 2026
EPSS: 0.2% · 18th percentile
CWE: CWE-120

Report tools

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Action score

Monitor

Low priority for now.

CVSS: 31 / 40 · 7.8 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.2%

CISA SSVC decision

Exploitation: none
Automatable: no
Technical impact: total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: 7.8
CNA · Linux: 7.8; agree

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.

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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.

Vendor	Product	CPE
linux	linux kernel	cpe:2.3:o:linux:linux_kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

linux linux kernelbefore 6.1.129
linux linux kernel6.2 and later · before 6.6.79
linux linux kernel6.7 and later · before 6.12.16
linux linux kernel6.13 and later · before 6.13.4
linux linux kernel6.14

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
- 5.2affected
- 137d63abbf6a0859e79b662e81d21170ecb75e59 and later · before 3484ea33157bc7334f57e64826ec5a4bf992151aaffected · git
- 137d63abbf6a0859e79b662e81d21170ecb75e59 and later · before e43a8b9c4d700ffec819c5043a48769b3e7d9cabaffected · git
- 137d63abbf6a0859e79b662e81d21170ecb75e59 and later · before 2498d2db1d35e88a2060ea191ae75dce853dd084affected · git
- 137d63abbf6a0859e79b662e81d21170ecb75e59 and later · before 231075c5a8ea54f34b7c4794687baa980814e6deaffected · git
- 137d63abbf6a0859e79b662e81d21170ecb75e59 and later · before 1abb2648698bf10783d2236a6b4a7ca5e8021699affected · git
- before 5.2not affected · semver
- 6.1.129 and later · up to and including 6.1.*not affected · semver
- 6.6.79 and later · up to and including 6.6.*not affected · semver
- 6.12.16 and later · up to and including 6.12.*not affected · semver

Package-level exposure

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

Ecosystem	Package	Affected range	Fix
Debian:12	linux	before 6.1.129-1	6.1.129-1
Debian:13	linux	before 6.12.16-1	6.12.16-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
90Now
CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
89Now
CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
85Now

Published before and after this one in the same product

← EarlierCVE-2025-21776Feb 27, 2025 · USB: hub: Ignore non-compliant devices with too many configs or interfaces
22Monitor
← EarlierCVE-2025-21779Feb 27, 2025 · KVM: x86: Reject Hyper-V's SEND_IPI hypercalls if local APIC isn't in-kernel
22Monitor
Later →CVE-2025-21785Feb 27, 2025 · arm64: cacheinfo: Avoid out-of-bounds write to cacheinfo array
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 / package	Fixed version	Source
Linux Linux	1abb2648698bf10783d2236a6b4a7ca5e8021699	Vendor (CNA)
Linux Linux	231075c5a8ea54f34b7c4794687baa980814e6de	Vendor (CNA)
Linux Linux	2498d2db1d35e88a2060ea191ae75dce853dd084	Vendor (CNA)
Linux Linux	3484ea33157bc7334f57e64826ec5a4bf992151a	Vendor (CNA)
Linux Linux	e43a8b9c4d700ffec819c5043a48769b3e7d9cab	Vendor (CNA)
azl3 kernel 6.6.78.1-3 on Azure Linux 3.0	6.6.79.1-1 · CBL-Mariner Releases	Microsoft (MSRC)
azl3 kernel 6.6.79.1-1 on Azure Linux 3.0	6.6.79.1-1 · CBL-Mariner Releases	Microsoft (MSRC)
cbl2 kernel 5.15.202.1-1 on CBL-Mariner 2.0	—	Microsoft (MSRC)
debian:linux	6.1.129-1 · Debian:12	Package 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.

No history yet (it accumulates with the daily EPSS job).

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.

CVE-2023-44466517 days apartAn issue was discovered in net/ceph/messenger_v2.c in the Linux kernel before 6.4.5.
48Plan
CVE-2026-63887507 days apartscsi: target: iscsi: Bound iscsi_encode_text_output() appends to rsp_buf
39Monitor
CVE-2023-52735282 days apartbpf, sockmap: Don't let sock_map_{close,destroy,unhash} call itself
36Monitor
CVE-2026-31622421 days apartNFC: digital: Bounds check NFC-A cascade depth in SDD response handler
35Monitor
CVE-2024-26927305 days apartASoC: SOF: Add some bounds checking to firmware data
33Monitor
CVE-2026-46332467 days apartgreybus: gb-beagleplay: bound bootloader receive buffering
32Monitor

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)

CWE-120 · Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

nvd-primary

Root cause

When data is copied, the source length is not compared with the size of the destination buffer. Excess data overwrites adjacent memory.

The bug in code

The whole CWE-120 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1char buf[256];
2memcpy(buf, pkt->data, pkt->len);

Fixed

1char buf[256];
2if (pkt->len > sizeof(buf)) {
3  return -EINVAL;
4}
5memcpy(buf, pkt->data, pkt->len);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Attack patterns (CAPEC)

ATT&CK techniques

—

Change log

Fix✗ → ✓Sep 28, 2026, 10:10 PM UTC

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

References

git.kernel.org/stable/c/1abb2648698bf10783d2236a6b4a7ca5e8021699

Show all references (7 more)

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

All records