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CVE-2023-53285· NVD / CVE Program· CNA Linux

ext4: add bounds checking in get_max_inline_xattr_value_size()

In the Linux kernel, the following vulnerability has been resolved: ext4: add bounds checking in get_max_inline_xattr_value_size() Normally the extended attributes in the inode body would have been checked when the inode is first opened, but if someone is writing to the block device while the file system is mounted, it's possible for the inode table to get corrupted. Add bounds checking to avoid reading beyond the end of allocated memory if this happens.

HighCVSS 7.8 · v3.1—No exploit Fix available

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Published
Sep 16, 2025
Updated
Aug 5, 2026
EPSS
0.2% · 4th percentile
CWE
—
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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
7.8
CNA · Linux
7.1
0.7 point gap

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Affected systems

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 4.14.315
  • linux linux kernel4.15 and later · before 4.19.283
  • linux linux kernel4.20 and later · before 5.4.243
  • linux linux kernel5.5 and later · before 5.10.180
  • linux linux kernel5.11 and later · before 5.15.112
  • linux linux kernel5.16 and later · before 6.1.29
  • linux linux kernel6.2 and later · before 6.2.16
  • linux linux kernel6.3 and later · before 6.3.3
  • linux linux kernel6.4

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

    • 3.8affected
    • 67cf5b09a46f72e048501b84996f2f77bc42e947 and later · before 5a229d21b98d132673096710e8281ef522dab1d1affected · git
    • 67cf5b09a46f72e048501b84996f2f77bc42e947 and later · before 3d7b8fbcd2273e2b9f4c6de5ce2f4c0cd3cb1205affected · git
    • 67cf5b09a46f72e048501b84996f2f77bc42e947 and later · before 486efbbc9445dca7890a1b86adbccb88b91284b0affected · git
    • 67cf5b09a46f72e048501b84996f2f77bc42e947 and later · before 4597554b4f7b29e7fd78aa449bab648f8da4ee2caffected · git
    • 67cf5b09a46f72e048501b84996f2f77bc42e947 and later · before f22b274429e88d3dc7e79d375b56ce4f2f59f0b4affected · git
    • 67cf5b09a46f72e048501b84996f2f77bc42e947 and later · before 1d2caddbeeee56fbbc36b428c5b909c3ad88eb7faffected · git
    • 67cf5b09a46f72e048501b84996f2f77bc42e947 and later · before e780058bd75614b66882bc02620ddbd884171560affected · git
    • 67cf5b09a46f72e048501b84996f2f77bc42e947 and later · before 88a06a94942c5c0a896e9da1113a6bb29e36cbefaffected · git
    • 67cf5b09a46f72e048501b84996f2f77bc42e947 and later · before 2220eaf90992c11d888fe771055d4de330385f01affected · git

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.37-16.1.37-1
Debian:13linuxbefore 6.3.7-16.3.7-1

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
  • CVE-2019-13272In the Linux kernel before 5.1.17, ptrace_link in kernel/ptrace.c mishandles the recording of the credentials of a process that wants to creKEV
    77This week
  • CVE-2013-6282The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the v6k and v7 ARM platforms do not validate certain addKEV
    77This week
  • CVE-2013-2094The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9 uses an incorrect integer data type, which allows loKEV
    77This week

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 Linux1d2caddbeeee56fbbc36b428c5b909c3ad88eb7fVendor (CNA)
Linux Linux2220eaf90992c11d888fe771055d4de330385f01Vendor (CNA)
Linux Linux3d7b8fbcd2273e2b9f4c6de5ce2f4c0cd3cb1205Vendor (CNA)
Linux Linux4597554b4f7b29e7fd78aa449bab648f8da4ee2cVendor (CNA)
Linux Linux486efbbc9445dca7890a1b86adbccb88b91284b0Vendor (CNA)
Linux Linux5a229d21b98d132673096710e8281ef522dab1d1Vendor (CNA)
Linux Linux88a06a94942c5c0a896e9da1113a6bb29e36cbefVendor (CNA)
Linux Linuxe780058bd75614b66882bc02620ddbd884171560Vendor (CNA)
Linux Linuxf22b274429e88d3dc7e79d375b56ce4f2f59f0b4Vendor (CNA)
debian:linux6.1.37-1 · 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.

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
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)

—

CVSS vector

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

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

All records