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CVE-2023-52810· NVD / CVE Program· CNA Linux

fs/jfs: Add check for negative db_l2nbperpage

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: 0.26% (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 0cb567e727339a192f9fd0db00781d73a91d15a6, 1a7c53fdea1d189087544d9a606d249e93c4934b, 491085258185ffc4fb91555b0dba895fe7656a45.

Low priority for now. Upgrade to Linux Linux 0cb567e727339a192f9fd0db00781d73a91d15a6, 1a7c53fdea1d189087544d9a606d249e93c4934b, 491085258185ffc4fb91555b0dba895fe7656a45 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: fs/jfs: Add check for negative db_l2nbperpage l2nbperpage is log2(number of blks per page), and the minimum legal value should be 0, not negative. In the case of l2nbperpage being negative, an error will occur when subsequently used as shift exponent. Syzbot reported this bug: UBSAN: shift-out-of-bounds in fs/jfs/jfs_dmap.c:799:12 shift exponent -16777216 is negative

HighCVSS 7.8 · v3.1—No exploit Fix available
Published
May 21, 2024
Updated
Aug 5, 2026
EPSS
0.2% · 17th 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
total

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

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2023-52810

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

Affected versions

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

  • linux linux kernelbefore 4.14.331
  • linux linux kernel4.15 and later · before 4.19.300
  • linux linux kernel4.20 and later · before 5.4.262
  • linux linux kernel5.5 and later · before 5.10.202
  • linux linux kernel5.11 and later · before 5.15.140
  • linux linux kernel5.16 and later · before 6.1.64
  • linux linux kernel6.2 and later · before 6.5.13
  • linux linux kernel6.6 and later · before 6.6.3

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

    • 2.6.12affected
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before cc61fcf7d1c99f148fe8ddfb5c6ed0bb75861f01affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 8f2964df6bfce9d92d81ca552010b8677af8d9dcaffected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before a81a56b4cbe3142cc99f6b98e8f9b3a631c768e1affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 524b4f203afcf87accfe387e846f33f916f0c907affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 5f148b16972e5f4592629b244d5109b15135f53faffected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 0cb567e727339a192f9fd0db00781d73a91d15a6affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 491085258185ffc4fb91555b0dba895fe7656a45affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 1a7c53fdea1d189087544d9a606d249e93c4934baffected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 525b861a008143048535011f3816d407940f4bfaaffected · git

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.64-16.1.64-1
Debian:13linuxbefore 6.6.8-16.6.8-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • 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
  • CVE-2016-5195Race condition in mm/gup.c in the Linux kernel 2.x through 4.x before 4.8.3 allows local users to gain privileges by leveraging incorrect haKEV
    83Now

Published before and after this one in the same product

  • ← EarlierCVE-2023-52808May 21, 2024 · scsi: hisi_sas: Set debugfs_dir pointer to NULL after removing debugfs
    22Monitor
  • ← EarlierCVE-2023-52809May 21, 2024 · scsi: libfc: Fix potential NULL pointer dereference in fc_lport_ptp_setup()
    22Monitor
  • Later →CVE-2023-52811May 21, 2024 · scsi: ibmvfc: Remove BUG_ON in the case of an empty event pool
    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 Linux0cb567e727339a192f9fd0db00781d73a91d15a6Vendor (CNA)
Linux Linux1a7c53fdea1d189087544d9a606d249e93c4934bVendor (CNA)
Linux Linux491085258185ffc4fb91555b0dba895fe7656a45Vendor (CNA)
Linux Linux524b4f203afcf87accfe387e846f33f916f0c907Vendor (CNA)
Linux Linux525b861a008143048535011f3816d407940f4bfaVendor (CNA)
Linux Linux5f148b16972e5f4592629b244d5109b15135f53fVendor (CNA)
Linux Linux8f2964df6bfce9d92d81ca552010b8677af8d9dcVendor (CNA)
Linux Linuxa81a56b4cbe3142cc99f6b98e8f9b3a631c768e1Vendor (CNA)
Linux Linuxcc61fcf7d1c99f148fe8ddfb5c6ed0bb75861f01Vendor (CNA)
debian:linux6.1.64-1 · 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.

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-2023-3161344 days apartA flaw was found in the Framebuffer Console (fbcon) in the Linux Kernel.
    22Monitor

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-1335 · Incorrect Bitwise Shift of Integer

CVSS vector

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

nvd-secondary

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 (8 more)

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

All records