NVD / CVE Program· CNA Linux

CVE-2024-50131: tracing: Consider the NULL character when validating the event length

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: 0.24% (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 02874ca52df2ca2423ba6122039315ed61c25972, 0b6e2e22cb23105fcb171ab92f0f7516c69c8471, 5e3231b352725ff4a3a0095e6035af674f2d8725; azl3 kernel 6.6.57.1-7 on Azure Linux 3.0 6.6.64.2-1; azl3 kernel 6.6.64.2-1 on Azure Linux 3.0 6.6.64.2-1.
Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 02874ca52df2ca2423ba6122039315ed61c25972, 0b6e2e22cb23105fcb171ab92f0f7516c69c8471, 5e3231b352725ff4a3a0095e6035af674f2d8725; azl3 kernel 6.6.57.1-7 on Azure Linux 3.0 6.6.64.2-1; azl3 kernel 6.6.64.2-1 on Azure Linux 3.0 6.6.64.2-1 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: tracing: Consider the NULL character when validating the event length strlen() returns a string length excluding the null byte. If the string length equals to the maximum buffer length, the buffer will have no space for the NULL terminating character. This commit checks this condition and returns failure for it.

HighCVSS 7.8 · v3.1—No exploit Fix available

Memory safety

BDU:2025-03604

Published: Nov 5, 2024
Updated: Oct 15, 2026
EPSS: 0.2% · 15th percentile
CWE: CWE-120

Report tools

JSON

Action score

Monitor

Low priority for now.

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

CNA vs NVD score

NVD: 7.8
CNA · Linux: 7.3; 0.5 point gap

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

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 kernel5.1 and later · before 5.15.170
linux linux kernel5.16 and later · before 6.1.115
linux linux kernel6.2 and later · before 6.6.59
linux linux kernel6.7 and later · before 6.11.6
linux linux kernel6.12

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
- 5.1affected
- dec65d79fd269d05427c8167090bfc9c3d0b56c4 and later · before 5e3231b352725ff4a3a0095e6035af674f2d8725affected · git
- dec65d79fd269d05427c8167090bfc9c3d0b56c4 and later · before 02874ca52df2ca2423ba6122039315ed61c25972affected · git
- dec65d79fd269d05427c8167090bfc9c3d0b56c4 and later · before b86b0d6eea204116e4185acc35041ca4ff11a642affected · git
- dec65d79fd269d05427c8167090bfc9c3d0b56c4 and later · before f4ed40d1c669bba1a54407d8182acdc405683f29affected · git
- dec65d79fd269d05427c8167090bfc9c3d0b56c4 and later · before a14a075a14af8d622c576145455702591bdde09daffected · git
- dec65d79fd269d05427c8167090bfc9c3d0b56c4 and later · before 5fd942598ddeed9a212d1ff41f9f5b47bcc990a7affected · git
- dec65d79fd269d05427c8167090bfc9c3d0b56c4 and later · before 0b6e2e22cb23105fcb171ab92f0f7516c69c8471affected · git
- before 5.1not affected · semver
- 5.4.285 and later · up to and including 5.4.*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 6.1.115-1	6.1.115-1
Debian:13	linux	before 6.11.6-1	6.11.6-1

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-2024-50121Nov 5, 2024 · nfsd: cancel nfsd_shrinker_work using sync mode in nfs4_state_shutdown_net
31Monitor
← EarlierCVE-2024-50127Nov 5, 2024 · net: sched: fix use-after-free in taprio_change()
31Monitor
Later →CVE-2024-50134Nov 5, 2024 · drm/vboxvideo: Replace fake VLA at end of vbva_mouse_pointer_shape with real VLA
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 / package	Fixed version	Source
Linux Linux	02874ca52df2ca2423ba6122039315ed61c25972	Vendor (CNA)
Linux Linux	0b6e2e22cb23105fcb171ab92f0f7516c69c8471	Vendor (CNA)
Linux Linux	5e3231b352725ff4a3a0095e6035af674f2d8725	Vendor (CNA)
Linux Linux	5fd942598ddeed9a212d1ff41f9f5b47bcc990a7	Vendor (CNA)
Linux Linux	a14a075a14af8d622c576145455702591bdde09d	Vendor (CNA)
Linux Linux	b86b0d6eea204116e4185acc35041ca4ff11a642	Vendor (CNA)
Linux Linux	f4ed40d1c669bba1a54407d8182acdc405683f29	Vendor (CNA)
azl3 kernel 6.6.57.1-7 on Azure Linux 3.0	6.6.64.2-1 · CBL-Mariner Releases	Microsoft (MSRC)
azl3 kernel 6.6.64.2-1 on Azure Linux 3.0	6.6.64.2-1 · CBL-Mariner Releases	Microsoft (MSRC)
cbl2 kernel 5.15.167.1-2 on CBL Mariner 2.0	5.15.173.1-1 · CBL-Mariner Releases	Microsoft (MSRC)
cbl2 kernel 5.15.167.1-2 on CBL-Mariner 2.0	5.15.173.1-1 · CBL-Mariner Releases	Microsoft (MSRC)
cbl2 kernel 5.15.173.1-1 on CBL Mariner 2.0	5.15.173.1-1 · CBL-Mariner Releases	Microsoft (MSRC)
debian:linux	6.1.115-1 · 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.

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.

CVE-2023-44466403 days apartAn issue was discovered in net/ceph/messenger_v2.c in the Linux kernel before 6.4.5.
49Plan
CVE-2023-52735168 days apartbpf, sockmap: Don't let sock_map_{close,destroy,unhash} call itself
36Monitor
CVE-2026-31622535 days apartNFC: digital: Bounds check NFC-A cascade depth in SDD response handler
35Monitor
CVE-2024-26927191 days apartASoC: SOF: Add some bounds checking to firmware data
33Monitor
CVE-2024-5028213 days apartdrm/amdgpu: add missing size check in amdgpu_debugfs_gprwave_read()
31Monitor
CVE-2024-4999615 days apartcifs: Fix buffer overflow when parsing NFS reparse points
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).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

TR-24-1826 · Nov 6, 2024(Linux Kernel Güvenlik Bildirimi)

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)

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, 10:09 PM UTC

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

References

git.kernel.org/stable/c/02874ca52df2ca2423ba6122039315ed61c25972

Show all references (9 more)

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

All records