NVD / CVE Program· CNA Linux

CVE-2024-35866: smb: client: fix potential UAF in cifs_dump_full_key()

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 10e17ca4000ec34737bde002a13435c38ace2682, 3103163ccd3be4adcfa37e15608fb497be044113, 58acd1f497162e7d282077f816faa519487be045; cbl2 kernel 5.15.182.1-1 on CBL Mariner 2.0 CBL-Mariner Releases; cbl2 kernel 5.15.182.1-1 on CBL-Mariner 2.0 5.15.182.1-1.
Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 10e17ca4000ec34737bde002a13435c38ace2682, 3103163ccd3be4adcfa37e15608fb497be044113, 58acd1f497162e7d282077f816faa519487be045; cbl2 kernel 5.15.182.1-1 on CBL Mariner 2.0 CBL-Mariner Releases; cbl2 kernel 5.15.182.1-1 on CBL-Mariner 2.0 5.15.182.1-1 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: smb: client: fix potential UAF in cifs_dump_full_key() Skip sessions that are being teared down (status == SES_EXITING) to avoid UAF.

HighCVSS 7.8 · v3.1—No exploit Fix available

Memory safety

Published: May 19, 2024
Updated: Jun 17, 2026
EPSS: 0.2% · 15th percentile
CWE: CWE-416

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.

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
debian	debian linux	cpe:2.3:o:debian:debian_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 kernel5.13 and later · before 5.15.181
linux linux kernel5.16 and later · before 6.1.132
linux linux kernel6.2 and later · before 6.6.26
linux linux kernel6.7 and later · before 6.8.5
linux linux kernel6.9

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
- 5.13affected
- 1bb56810677f26b78d57a3038054943efd334a1c and later · before d798fd98e3563027c5162259ead517057d6fa794affected · git
- 1bb56810677f26b78d57a3038054943efd334a1c and later · before f4a60d360d9114b5085701a3702a0102b0d6d846affected · git
- 1bb56810677f26b78d57a3038054943efd334a1c and later · before 10e17ca4000ec34737bde002a13435c38ace2682affected · git
- 1bb56810677f26b78d57a3038054943efd334a1c and later · before 3103163ccd3be4adcfa37e15608fb497be044113affected · git
- 1bb56810677f26b78d57a3038054943efd334a1c and later · before 58acd1f497162e7d282077f816faa519487be045affected · git
- before 5.13not affected · semver
- 5.15.181 and later · up to and including 5.15.*not affected · semver
- 6.1.132 and later · up to and including 6.1.*not affected · semver
- 6.6.26 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:11	linux-6.1	before 6.1.137-1~deb11u1	6.1.137-1~deb11u1
Debian:12	linux	before 6.1.133-1	6.1.133-1
Debian:13	linux	before 6.8.9-1	6.8.9-1

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-2024-35864May 19, 2024 · smb: client: fix potential UAF in smb2_is_valid_lease_break()
31Monitor
← EarlierCVE-2024-35865May 19, 2024 · smb: client: fix potential UAF in smb2_is_valid_oplock_break()
39Monitor
Later →CVE-2024-35867May 19, 2024 · smb: client: fix potential UAF in cifs_stats_proc_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	10e17ca4000ec34737bde002a13435c38ace2682	Vendor (CNA)
Linux Linux	3103163ccd3be4adcfa37e15608fb497be044113	Vendor (CNA)
Linux Linux	58acd1f497162e7d282077f816faa519487be045	Vendor (CNA)
Linux Linux	d798fd98e3563027c5162259ead517057d6fa794	Vendor (CNA)
Linux Linux	f4a60d360d9114b5085701a3702a0102b0d6d846	Vendor (CNA)
cbl2 kernel 5.15.182.1-1 on CBL Mariner 2.0	CBL-Mariner Releases	Microsoft (MSRC)
cbl2 kernel 5.15.182.1-1 on CBL-Mariner 2.0	5.15.182.1-1 · CBL-Mariner Releases	Microsoft (MSRC)
debian:linux	6.1.133-1 · Debian:12	Package registry (OSV)
debian:linux-6.1	6.1.137-1~deb11u1 · Debian:11	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.

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.

TR-24-0506 · May 20, 2024(Linux Kernel Güncellemesi)

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-416 · Use After Free

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

After a memory region is freed, another reference pointing to it is still used. By then, the same region may have been allocated for different data.

The bug in code

The whole CWE-416 class

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

Vulnerable

1free(dev->buf);
2/* ... another thread is still running ... */
3process(dev->buf);

Fixed

1lock(&dev->lock);
2free(dev->buf);
3dev->buf = NULL;
4unlock(&dev->lock);

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

Fix✗ → ✓Sep 28, 2026, 10:10 PM UTC

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

References

git.kernel.org/stable/c/10e17ca4000ec34737bde002a13435c38ace2682

Show all references (5 more)

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

All records