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NVD / CVE Program· CNA Linux

CVE-2023-53796: f2fs: fix information leak in f2fs_move_inline_dirents()

Noroxi assessment

Priority: Monitor (action score 0/100)

  • 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: 0.21% (FIRST EPSS).
  • Fixed version: Linux Linux 00b5587326625d0fddb2a5f5a3d4acd950102ace, 117d4f6687b1f74423b5d398ea95c63b262a8e73, 2bef8314fcf94ddc27e22d03f237c0fafd00de33.

Low priority for now. Upgrade to Linux Linux 00b5587326625d0fddb2a5f5a3d4acd950102ace, 117d4f6687b1f74423b5d398ea95c63b262a8e73, 2bef8314fcf94ddc27e22d03f237c0fafd00de33 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: f2fs: fix information leak in f2fs_move_inline_dirents() When converting an inline directory to a regular one, f2fs is leaking uninitialized memory to disk because it doesn't initialize the entire directory block. Fix this by zero-initializing the block. This bug was introduced by commit 4ec17d688d74 ("f2fs: avoid unneeded initializing when converting inline dentry"), which didn't consider the security implications of leaking uninitialized memory to disk. This was found by running xfstest generic/435 on a KMSAN-enabled kernel.

—No exploit Fix available
Published
Dec 8, 2025
Updated
Jun 17, 2026
EPSS
0.2% · 11th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

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  • No public exploit code on record
  • A fix has been released

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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.

—

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

    • 4.3affected
    • 4ec17d688d74b6b7cb10043c57ff4818cde2b0ca and later · before 4e3b4b170bd43db1d8a93a6bd0ea434b17cc86f7affected · git
    • 4ec17d688d74b6b7cb10043c57ff4818cde2b0ca and later · before a6807ef0f3b3d8508d3b07a2e35de8a91820a014affected · git
    • 4ec17d688d74b6b7cb10043c57ff4818cde2b0ca and later · before 2bef8314fcf94ddc27e22d03f237c0fafd00de33affected · git
    • 4ec17d688d74b6b7cb10043c57ff4818cde2b0ca and later · before 00b5587326625d0fddb2a5f5a3d4acd950102aceaffected · git
    • 4ec17d688d74b6b7cb10043c57ff4818cde2b0ca and later · before 117d4f6687b1f74423b5d398ea95c63b262a8e73affected · git
    • 4ec17d688d74b6b7cb10043c57ff4818cde2b0ca and later · before f07a8d61b6ea81bb3cbe0638af40f8824d6147fdaffected · git
    • 4ec17d688d74b6b7cb10043c57ff4818cde2b0ca and later · before eebaecef0095bb8f493c03982da75c6e7bae1056affected · git
    • 4ec17d688d74b6b7cb10043c57ff4818cde2b0ca and later · before 9a5571cff4ffcfc24847df9fd545cc5799ac0ee5affected · git
    • before 4.3not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.20-16.1.20-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2023-53793Dec 8, 2025 · perf tool x86: Fix perf_env memory leak
    0Monitor
  • ← EarlierCVE-2023-53795Dec 8, 2025 · iommufd: IOMMUFD_DESTROY should not increase the refcount
    31Monitor
  • Later →CVE-2023-53797Dec 8, 2025 · HID: wacom: Use ktime_t rather than int when dealing with timestamps
    28Monitor

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 Linux00b5587326625d0fddb2a5f5a3d4acd950102aceVendor (CNA)
Linux Linux117d4f6687b1f74423b5d398ea95c63b262a8e73Vendor (CNA)
Linux Linux2bef8314fcf94ddc27e22d03f237c0fafd00de33Vendor (CNA)
Linux Linux4e3b4b170bd43db1d8a93a6bd0ea434b17cc86f7Vendor (CNA)
Linux Linux9a5571cff4ffcfc24847df9fd545cc5799ac0ee5Vendor (CNA)
Linux Linuxa6807ef0f3b3d8508d3b07a2e35de8a91820a014Vendor (CNA)
Linux Linuxeebaecef0095bb8f493c03982da75c6e7bae1056Vendor (CNA)
Linux Linuxf07a8d61b6ea81bb3cbe0638af40f8824d6147fdVendor (CNA)
debian:linux6.1.20-1 · 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

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

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✗ → ✓

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References

Show all references (7 more)

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

All records