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CVE Record

CVE-2023-53214: f2fs: fix to avoid potential memory corruption in __update_iostat_latency()

In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to avoid potential memory corruption in __update_iostat_latency() Add iotype sanity check to avoid potential memory corruption. This is to fix the compile error below: fs/f2fs/iostat.c:231 __update_iostat_latency() error: buffer overflow 'io_lat->peak_lat[type]' 3 <= 3 vim +228 fs/f2fs/iostat.c 211 static inline void __update_iostat_latency(struct bio_iostat_ctx *iostat_ctx, 212 enum iostat_lat_type type) 213 { 214 unsigned long ts_diff; 215 unsigned int page_type = iostat_ctx->type; 216 struct f2fs_sb_info *sbi = iostat_ctx->sbi; 217 struct iostat_lat_info *io_lat = sbi->iostat_io_lat; 218 unsigned long flags; 219 220 if (!sbi->iostat_enable) 221 return; 222 223 ts_diff = jiffies - iostat_ctx->submit_ts; 224 if (page_type >= META_FLUSH) ^^^^^^^^^^ 225 page_type = META; 226 227 spin_lock_irqsave(&sbi->iostat_lat_lock, flags); @228 io_lat->sum_lat[type][page_type] += ts_diff; ^^^^^^^^^ Mixup between META_FLUSH and NR_PAGE_TYPE leads to memory corruption.

HighCVSS 7.8Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

This Linux kernel issue can corrupt memory in F2FS filesystem accounting code. It is rated high because the CVSS vector indicates local, low-privilege access could affect confidentiality, integrity, and availability. The provided sources show fixes in Linux stable commits, but do not show active exploitation.

Executive priority

Prioritize remediation for shared Linux hosts, developer workstations, container platforms, and systems with local multi-user access. Internet-facing exposure is not indicated by the sources, but kernel memory corruption with low-privilege local access warrants timely patching during the next appropriate maintenance window.

Technical view

CVE-2023-53214 is a CWE-787 out-of-bounds write risk in fs/f2fs/iostat.c. A mixup between META_FLUSH and NR_PAGE_TYPE could index iostat latency arrays incorrectly in __update_iostat_latency(). The fix adds an iotype sanity check. CVSS 3.1 is 7.8, AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Likely exposure

Exposure is most relevant to Linux systems running affected kernel versions with F2FS code paths present or used. The source bundle lists Linux kernel versions including 5.15, 5.15.100, 6.1.18, 6.2.5, and 6.3 as affected context, with stable kernel commits referenced as fixes.

Exploitation context

The provided data does not identify public exploitation or CISA KEV listing. The CVSS vector indicates exploitation would be local and require low privileges, with no user interaction. Treat this as a local privilege-impacting kernel memory corruption risk until vendor guidance narrows exploitability.

Researcher notes

Evidence is limited to the CVE record and Linux stable commit references. The root issue is an array bounds problem in F2FS iostat latency handling. Do not assume remote reachability or confirmed exploitation. Validate through kernel source, vendor changelogs, and whether the relevant F2FS path is compiled and used.

Mitigation direction

  • Update to a Linux kernel containing the referenced stable fixes.
  • Check your distribution advisory for backported CVE-2023-53214 fixes.
  • Prioritize systems allowing untrusted local users or workloads.
  • Review F2FS usage before assigning business criticality.
  • Track vendor kernel packages rather than only upstream version numbers.

Validation and detection

  • Inventory Linux kernel versions across servers, endpoints, and images.
  • Confirm whether vendor kernels include the referenced stable commits.
  • Identify systems using or enabling F2FS filesystems.
  • Check vulnerability scanner findings against distro advisories.
  • Document exceptions where no vendor fix is available yet.
Prepared
Confidence
high
Sources
6

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cwe · low confidence lookup

CWE-787: Exact CWE lookup

Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2023-53214 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
High
CVSS
7.8 (3.1)
Known Exploited
No
Published

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

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
3Timeline events
1ADP providers
5Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: noTechnical Impact: total

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
7.8CVSS 3.1HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H1.85.9CISA-ADP

Vulnerability scoring details

Base CVSS 3.1 score

7.8High
CVSS 3.1 vector shape for CVE-2023-53214Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
cvssV3_1other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinuxa4b6817625e71d5d4aee16cacf7a7fec077c6dbe, a4b6817625e71d5d4aee16cacf7a7fec077c6dbe, a4b6817625e71d5d4aee16cacf7a7fec077c6dbe, a4b6817625e71d5d4aee16cacf7a7fec077c6dbeunaffected
LinuxLinux5.15, 0, 5.15.100, 6.1.18, 6.2.5, 6.3affected
Weakness

CWE details

CWE-787

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.

CWE-787 · source CWE mapping

Out-of-bounds Write

Out-of-bounds Write represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

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