NVD / CVE Program· CNA Linux

CVE-2024-56557: iio: adc: ad7923: Fix buffer overflow for tx_buf and ring_xfer

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: 0.25% (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 00663d3e000c31d0d49ef86a809f5c107c2d09cd, 218ecc35949129171ca39bcc0d407c8dc4cd0bbc, 3a4187ec454e19903fd15f6e1825a4b84e59a4cd.

Low priority for now. Upgrade to Linux Linux 00663d3e000c31d0d49ef86a809f5c107c2d09cd, 218ecc35949129171ca39bcc0d407c8dc4cd0bbc, 3a4187ec454e19903fd15f6e1825a4b84e59a4cd 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: iio: adc: ad7923: Fix buffer overflow for tx_buf and ring_xfer The AD7923 was updated to support devices with 8 channels, but the size of tx_buf and ring_xfer was not increased accordingly, leading to a potential buffer overflow in ad7923_update_scan_mode().

HighCVSS 7.8 · v3.1—No exploit Fix available

Memory safety

BDU:2025-07798

Published: Dec 27, 2024
Updated: Aug 5, 2026
EPSS: 0.2% · 16th 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: partial

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

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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 kernel5.6 and later · before 6.1.120
linux linux kernel6.2 and later · before 6.6.64
linux linux kernel6.7 and later · before 6.12.4

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
- 5.6affected
- 851644a60d200c9a294de5a5594004bcf13d34c7 and later · before 6e4d236d9c4b38571c394d3ab6e85dfb71c33ed3affected · git
- 851644a60d200c9a294de5a5594004bcf13d34c7 and later · before 00663d3e000c31d0d49ef86a809f5c107c2d09cdaffected · git
- 851644a60d200c9a294de5a5594004bcf13d34c7 and later · before e5cac32721997cb8bcb208a29f4598b3faf46338affected · git
- 851644a60d200c9a294de5a5594004bcf13d34c7 and later · before 218ecc35949129171ca39bcc0d407c8dc4cd0bbcaffected · git
- 851644a60d200c9a294de5a5594004bcf13d34c7 and later · before 3a4187ec454e19903fd15f6e1825a4b84e59a4cdaffected · git
- before 5.6not affected · semver
- 5.15.203 and later · up to and including 5.15.*not affected · semver
- 6.1.120 and later · up to and including 6.1.*not affected · semver
- 6.6.64 and later · up to and including 6.6.*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 6.1.123-1	6.1.123-1
Debian:13	linux	before 6.12.5-1	6.12.5-1

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-2024-56555Dec 27, 2024 · binder: fix OOB in binder_add_freeze_work()
28Monitor
← EarlierCVE-2024-56556Dec 27, 2024 · binder: fix node UAF in binder_add_freeze_work()
28Monitor
Later →CVE-2024-56558Dec 27, 2024 · nfsd: make sure exp active before svc_export_show
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	00663d3e000c31d0d49ef86a809f5c107c2d09cd	Vendor (CNA)
Linux Linux	218ecc35949129171ca39bcc0d407c8dc4cd0bbc	Vendor (CNA)
Linux Linux	3a4187ec454e19903fd15f6e1825a4b84e59a4cd	Vendor (CNA)
Linux Linux	6e4d236d9c4b38571c394d3ab6e85dfb71c33ed3	Vendor (CNA)
Linux Linux	e5cac32721997cb8bcb208a29f4598b3faf46338	Vendor (CNA)
debian:linux	6.1.123-1 · 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-2023-44466455 days apartAn issue was discovered in net/ceph/messenger_v2.c in the Linux kernel before 6.4.5.
48Plan
CVE-2023-52735220 days apartbpf, sockmap: Don't let sock_map_{close,destroy,unhash} call itself
36Monitor
CVE-2026-31622483 days apartNFC: digital: Bounds check NFC-A cascade depth in SDD response handler
35Monitor
CVE-2024-26927243 days apartASoC: SOF: Add some bounds checking to firmware data
33Monitor
CVE-2026-46332529 days apartgreybus: gb-beagleplay: bound bootloader receive buffering
32Monitor
CVE-2024-531920 days apartclk: clk-loongson2: Fix potential buffer overflow in flexible-array member access
31Monitor

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-secondary

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, 10:08 PM UTC

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

References

git.kernel.org/stable/c/00663d3e000c31d0d49ef86a809f5c107c2d09cd

Show all references (5 more)

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

All records