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NVD / CVE Program· CNA Linux

CVE-2024-43839: bna: adjust 'name' buf size of bna_tcb and bna_ccb structures

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 6ce46045f9b90d952602e2c0b8886cfadf860bf1, 6d20c4044ab4d0e6a99aa35853e66f0aed5589e3, ab748dd10d8742561f2980fea08ffb4f0cacfdef.

Low priority for now. Upgrade to Linux Linux 6ce46045f9b90d952602e2c0b8886cfadf860bf1, 6d20c4044ab4d0e6a99aa35853e66f0aed5589e3, ab748dd10d8742561f2980fea08ffb4f0cacfdef 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: bna: adjust 'name' buf size of bna_tcb and bna_ccb structures To have enough space to write all possible sprintf() args. Currently 'name' size is 16, but the first '%s' specifier may already need at least 16 characters, since 'bnad->netdev->name' is used there. For '%d' specifiers, assume that they require: * 1 char for 'tx_id + tx_info->tcb[i]->id' sum, BNAD_MAX_TXQ_PER_TX is 8 * 2 chars for 'rx_id + rx_info->rx_ctrl[i].ccb->id', BNAD_MAX_RXP_PER_RX is 16 And replace sprintf with snprintf. Detected using the static analysis tool - Svace.

HighCVSS 7.8 · v3.1—No exploit Fix available
Published
Aug 17, 2024
Updated
Jun 17, 2026
EPSS
0.2% · 16th percentile

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 · 0.2%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

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-2024-43839

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.

VendorProduct
linuxlinux kernel
debiandebian linux

Affected versions

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

  • debian debian linux11.0
  • linux linux kernel2.6.37 and later · before 4.19.320
  • linux linux kernel4.20 and later · before 5.4.282
  • linux linux kernel5.5 and later · before 5.10.224
  • linux linux kernel5.11 and later · before 5.15.165
  • linux linux kernel5.16 and later · before 6.1.103
  • linux linux kernel6.2 and later · before 6.6.44
  • linux linux kernel6.7 and later · before 6.10.3

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

    • 2.6.37affected
    • 8b230ed8ec96c933047dd0625cf95f739e4939a6 and later · before f121740f69eda4da2de9a20a6687a13593e72540affected · git
    • 8b230ed8ec96c933047dd0625cf95f739e4939a6 and later · before c90b1cd7758fd4839909e838ae195d19f8065d76affected · git
    • 8b230ed8ec96c933047dd0625cf95f739e4939a6 and later · before 6ce46045f9b90d952602e2c0b8886cfadf860bf1affected · git
    • 8b230ed8ec96c933047dd0625cf95f739e4939a6 and later · before 6d20c4044ab4d0e6a99aa35853e66f0aed5589e3affected · git
    • 8b230ed8ec96c933047dd0625cf95f739e4939a6 and later · before ab748dd10d8742561f2980fea08ffb4f0cacfdefaffected · git
    • 8b230ed8ec96c933047dd0625cf95f739e4939a6 and later · before b0ff0cd0847b03c0a0abe20cfa900eabcfcb9e43affected · git
    • 8b230ed8ec96c933047dd0625cf95f739e4939a6 and later · before e0f48f51d55fb187400e9787192eda09fa200ff5affected · git
    • 8b230ed8ec96c933047dd0625cf95f739e4939a6 and later · before c9741a03dc8e491e57b95fba0058ab46b7e506daaffected · git
    • before 2.6.37not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.106-16.1.106-1
Debian:13linuxbefore 6.10.3-16.10.3-1

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-2024-43837Aug 17, 2024 · bpf: Fix null pointer dereference in resolve_prog_type() for BPF_PROG_TYPE_EXT
    22Monitor
  • ← EarlierCVE-2024-43838Aug 17, 2024 · bpf: fix overflow check in adjust_jmp_off()
    22Monitor
  • Later →CVE-2024-43840Aug 17, 2024 · bpf, arm64: Fix trampoline for BPF_TRAMP_F_CALL_ORIG
    22Monitor

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 Linux6ce46045f9b90d952602e2c0b8886cfadf860bf1Vendor (CNA)
Linux Linux6d20c4044ab4d0e6a99aa35853e66f0aed5589e3Vendor (CNA)
Linux Linuxab748dd10d8742561f2980fea08ffb4f0cacfdefVendor (CNA)
Linux Linuxb0ff0cd0847b03c0a0abe20cfa900eabcfcb9e43Vendor (CNA)
Linux Linuxc90b1cd7758fd4839909e838ae195d19f8065d76Vendor (CNA)
Linux Linuxc9741a03dc8e491e57b95fba0058ab46b7e506daVendor (CNA)
Linux Linuxe0f48f51d55fb187400e9787192eda09fa200ff5Vendor (CNA)
Linux Linuxf121740f69eda4da2de9a20a6687a13593e72540Vendor (CNA)
debian:linux6.1.106-1 · 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.

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.

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)

CWE-787 · Out-of-bounds Write

CVSS vector

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

nvd-primary

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 (9 more)

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

All records