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NVD / CVE Program· CNA Linux

CVE-2024-49877: ocfs2: fix possible null-ptr-deref in ocfs2_set_buffer_uptodate

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: 0.25% (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 01cb2e751cc61ade454c9bc1aaa2eac1f8197112, 190d98bcd61117a78fe185222d162180f061a6ca, 33b525cef4cff49e216e4133cc48452e11c0391e; azl3 kernel 6.6.51.1-5 on Azure Linux 3.0 6.6.56.1-5; azl3 kernel 6.6.56.1-5 on Azure Linux 3.0 6.6.56.1-5.

Low priority for now. Upgrade to Linux Linux 01cb2e751cc61ade454c9bc1aaa2eac1f8197112, 190d98bcd61117a78fe185222d162180f061a6ca, 33b525cef4cff49e216e4133cc48452e11c0391e; azl3 kernel 6.6.51.1-5 on Azure Linux 3.0 6.6.56.1-5; azl3 kernel 6.6.56.1-5 on Azure Linux 3.0 6.6.56.1-5 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: ocfs2: fix possible null-ptr-deref in ocfs2_set_buffer_uptodate When doing cleanup, if flags without OCFS2_BH_READAHEAD, it may trigger NULL pointer dereference in the following ocfs2_set_buffer_uptodate() if bh is NULL.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Oct 21, 2024
Updated
Jun 17, 2026
EPSS
0.2% · 16th 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-2024-49877

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 kernel4.20 and later · before 5.10.227
  • linux linux kernel5.11 and later · before 5.15.168
  • linux linux kernel5.16 and later · before 6.1.113
  • linux linux kernel6.2 and later · before 6.6.55
  • linux linux kernel6.7 and later · before 6.10.14
  • linux linux kernel6.11 and later · before 6.11.3
  • linux linux kernel4.14.157
  • linux linux kernel4.19.87
  • linux linux kernel4.4.204
  • linux linux kernel4.9.204

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

    • 01f93d5e36753fc4d06ec67f05ce78c9c6f2dd56, 65cbd1279f4b999d56a838344a30642db24cd215, 97e1db17bc1ef4c2e1789bc9323c7be44fba53f8, 4.20affected
    • 6c150df9c2e80b5cf86f5a0d98beb7390ad63bfc and later · before 190d98bcd61117a78fe185222d162180f061a6caaffected · git
    • cf76c78595ca87548ca5e45c862ac9e0949c4687 and later · before e68c8323355e8cedfbe0bec7d5a39009f61640b6affected · git
    • cf76c78595ca87548ca5e45c862ac9e0949c4687 and later · before 61b84013e560382cbe7dd56758be3154d43a3988affected · git
    • cf76c78595ca87548ca5e45c862ac9e0949c4687 and later · before df944dc46d06af65a75191183d52be017e6b9dbeaffected · git
    • cf76c78595ca87548ca5e45c862ac9e0949c4687 and later · before 01cb2e751cc61ade454c9bc1aaa2eac1f8197112affected · git
    • cf76c78595ca87548ca5e45c862ac9e0949c4687 and later · before d52c5652e7dcb7a0648bbb8642cc3e617070ab49affected · git
    • cf76c78595ca87548ca5e45c862ac9e0949c4687 and later · before 46b1edf0536a5291a8ad2337f88c926214b209d9affected · git
    • cf76c78595ca87548ca5e45c862ac9e0949c4687 and later · before 4846e72ab5a0726e49ad4188b9d9df091ae78c64affected · git
    • cf76c78595ca87548ca5e45c862ac9e0949c4687 and later · before 33b525cef4cff49e216e4133cc48452e11c0391eaffected · git

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.115-16.1.115-1
Debian:13linuxbefore 6.11.4-16.11.4-1

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-2024-49875Oct 21, 2024 · nfsd: map the EBADMSG to nfserr_io to avoid warning
    22Monitor
  • ← EarlierCVE-2024-49876Oct 21, 2024 · drm/xe: fix UAF around queue destruction
    31Monitor
  • Later →CVE-2024-49878Oct 21, 2024 · resource: fix region_intersects() vs add_memory_driver_managed()
    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 Linux01cb2e751cc61ade454c9bc1aaa2eac1f8197112Vendor (CNA)
Linux Linux190d98bcd61117a78fe185222d162180f061a6caVendor (CNA)
Linux Linux33b525cef4cff49e216e4133cc48452e11c0391eVendor (CNA)
Linux Linux4.10Vendor (CNA)
Linux Linux4.15Vendor (CNA)
Linux Linux4.19.323Vendor (CNA)
Linux Linux4.5Vendor (CNA)
Linux Linux46b1edf0536a5291a8ad2337f88c926214b209d9Vendor (CNA)
Linux Linux4846e72ab5a0726e49ad4188b9d9df091ae78c64Vendor (CNA)
Linux Linux61b84013e560382cbe7dd56758be3154d43a3988Vendor (CNA)
Linux Linuxd52c5652e7dcb7a0648bbb8642cc3e617070ab49Vendor (CNA)
Linux Linuxdf944dc46d06af65a75191183d52be017e6b9dbeVendor (CNA)
Linux Linuxe68c8323355e8cedfbe0bec7d5a39009f61640b6Vendor (CNA)
azl3 kernel 6.6.51.1-5 on Azure Linux 3.06.6.56.1-5 · CBL-Mariner ReleasesMicrosoft (MSRC)
azl3 kernel 6.6.56.1-5 on Azure Linux 3.06.6.56.1-5 · CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 kernel 5.15.167.1-2 on CBL Mariner 2.05.15.173.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 kernel 5.15.167.1-2 on CBL-Mariner 2.05.15.173.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 kernel 5.15.173.1-1 on CBL Mariner 2.05.15.173.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
debian:linux6.1.115-1 · 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-476 · NULL Pointer Dereference

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 (10 more)

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

All records