NVD / CVE Program· CNA Linux

CVE-2023-52600: jfs: fix uaf in jfs_evict_inode

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: 0.28% (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 1696d6d7d4a1b373e96428d0fe1166bd7c3c795e, 32e8f2d95528d45828c613417cb2827d866cbdce, 81b4249ef37297fb17ba102a524039a05c6c5d35.
Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 1696d6d7d4a1b373e96428d0fe1166bd7c3c795e, 32e8f2d95528d45828c613417cb2827d866cbdce, 81b4249ef37297fb17ba102a524039a05c6c5d35 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: jfs: fix uaf in jfs_evict_inode When the execution of diMount(ipimap) fails, the object ipimap that has been released may be accessed in diFreeSpecial(). Asynchronous ipimap release occurs when rcu_core() calls jfs_free_node(). Therefore, when diMount(ipimap) fails, sbi->ipimap should not be initialized as ipimap.

HighCVSS 7.8 · v3.1—No exploit Fix available

Memory safety

BDU:2025-00163

Published: Mar 6, 2024
Updated: Aug 5, 2026
EPSS: 0.2% · 20th 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.

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 4.19.307
linux linux kernel4.20 and later · before 5.4.269
linux linux kernel5.5 and later · before 5.10.210
linux linux kernel5.11 and later · before 5.15.149
linux linux kernel5.16 and later · before 6.1.77
linux linux kernel6.2 and later · before 6.6.16
linux linux kernel6.7 and later · before 6.7.4

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
- 2.6.12affected
- 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 81b4249ef37297fb17ba102a524039a05c6c5d35affected · git
- 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 93df0a2a0b3cde2d7ab3a52ed46ea1d6d4aaba5faffected · git
- 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before bc6ef64dbe71136f327d63b2b9071b828af2c2a8affected · git
- 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 8e44dc3f96e903815dab1d74fff8faafdc6feb61affected · git
- 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 32e8f2d95528d45828c613417cb2827d866cbdceaffected · git
- 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 1696d6d7d4a1b373e96428d0fe1166bd7c3c795eaffected · git
- 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before bacdaa04251382d7efd4f09f9a0686bfcc297e2eaffected · git
- 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before e0e1958f4c365e380b17ccb35617345b31ef7bf3affected · git
- before 2.6.12not 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 6.1.82-1	6.1.82-1
Debian:13	linux	before 6.7.7-1	6.7.7-1

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-2023-52598Mar 6, 2024 · s390/ptrace: handle setting of fpc register correctly
28Monitor
← EarlierCVE-2023-52599Mar 6, 2024 · jfs: fix array-index-out-of-bounds in diNewExt
31Monitor
Later →CVE-2023-52601Mar 6, 2024 · jfs: fix array-index-out-of-bounds in dbAdjTree
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	1696d6d7d4a1b373e96428d0fe1166bd7c3c795e	Vendor (CNA)
Linux Linux	32e8f2d95528d45828c613417cb2827d866cbdce	Vendor (CNA)
Linux Linux	81b4249ef37297fb17ba102a524039a05c6c5d35	Vendor (CNA)
Linux Linux	8e44dc3f96e903815dab1d74fff8faafdc6feb61	Vendor (CNA)
Linux Linux	93df0a2a0b3cde2d7ab3a52ed46ea1d6d4aaba5f	Vendor (CNA)
Linux Linux	bacdaa04251382d7efd4f09f9a0686bfcc297e2e	Vendor (CNA)
Linux Linux	bc6ef64dbe71136f327d63b2b9071b828af2c2a8	Vendor (CNA)
Linux Linux	e0e1958f4c365e380b17ccb35617345b31ef7bf3	Vendor (CNA)
debian:linux	6.1.82-1 · 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.

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-24-0180 · Mar 7, 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, 10:11 PM UTC

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

References

git.kernel.org/stable/c/1696d6d7d4a1b373e96428d0fe1166bd7c3c795e

Show all references (9 more)

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

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