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NVD / CVE Program· CNA Linux

CVE-2024-44938: jfs: Fix shift-out-of-bounds in dbDiscardAG

Noroxi assessment

Priority: Monitor (action score 22/100)

  • 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: 0.22% (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 234e6ea0855cdb5673d54ecaf7dc5c78f3e84630, 4de2c04c3acd5b84f50b0d2f8f09e9b2f42374b9, 7063b80268e2593e58bee8a8d709c2f3ff93e2f2.

Low priority for now. Upgrade to Linux Linux 234e6ea0855cdb5673d54ecaf7dc5c78f3e84630, 4de2c04c3acd5b84f50b0d2f8f09e9b2f42374b9, 7063b80268e2593e58bee8a8d709c2f3ff93e2f2 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 shift-out-of-bounds in dbDiscardAG When searching for the next smaller log2 block, BLKSTOL2() returned 0, causing shift exponent -1 to be negative. This patch fixes the issue by exiting the loop directly when negative shift is found.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Aug 26, 2024
Updated
Jun 17, 2026
EPSS
0.2% · 13th percentile

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 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-2024-44938

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 6.6.47
  • linux linux kernel6.7 and later · before 6.10.6

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

    • 3.7affected
    • b40c2e665cd552eae5fbdbb878bc29a34357668e and later · before bb7c605a754823b86dd74f6537ccb9d38a9dec5aaffected · git
    • b40c2e665cd552eae5fbdbb878bc29a34357668e and later · before 4de2c04c3acd5b84f50b0d2f8f09e9b2f42374b9affected · git
    • b40c2e665cd552eae5fbdbb878bc29a34357668e and later · before bd04a149e3a29e7f71b7956ed41dba34e42d539eaffected · git
    • b40c2e665cd552eae5fbdbb878bc29a34357668e and later · before f650148b43949ca9e37e820804bb6026fff404f3affected · git
    • b40c2e665cd552eae5fbdbb878bc29a34357668e and later · before 234e6ea0855cdb5673d54ecaf7dc5c78f3e84630affected · git
    • b40c2e665cd552eae5fbdbb878bc29a34357668e and later · before 7063b80268e2593e58bee8a8d709c2f3ff93e2f2affected · git
    • before 3.7not affected · semver
    • 5.10.237 and later · up to and including 5.10.*not affected · semver
    • 5.15.181 and later · up to and including 5.15.*not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.112-16.1.112-1
Debian:13linuxbefore 6.10.6-16.10.6-1

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-2024-44936Aug 26, 2024 · power: supply: rt5033: Bring back i2c_set_clientdata
    22Monitor
  • ← EarlierCVE-2024-44937Aug 26, 2024 · platform/x86: intel-vbtn: Protect ACPI notify handler against recursion
    22Monitor
  • Later →CVE-2024-44939Aug 26, 2024 · jfs: fix null ptr deref in dtInsertEntry
    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 Linux234e6ea0855cdb5673d54ecaf7dc5c78f3e84630Vendor (CNA)
Linux Linux4de2c04c3acd5b84f50b0d2f8f09e9b2f42374b9Vendor (CNA)
Linux Linux7063b80268e2593e58bee8a8d709c2f3ff93e2f2Vendor (CNA)
Linux Linuxbb7c605a754823b86dd74f6537ccb9d38a9dec5aVendor (CNA)
Linux Linuxbd04a149e3a29e7f71b7956ed41dba34e42d539eVendor (CNA)
Linux Linuxf650148b43949ca9e37e820804bb6026fff404f3Vendor (CNA)
debian:linux6.1.112-1 · 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
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
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:N/I:N/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 (7 more)

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

All records