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CVE Record

CVE-2024-26818: tools/rtla: Fix clang warning about mount_point var size

In the Linux kernel, the following vulnerability has been resolved: tools/rtla: Fix clang warning about mount_point var size clang is reporting this warning: $ make HOSTCC=clang CC=clang LLVM_IAS=1 [...] clang -O -g -DVERSION=\"6.8.0-rc3\" -flto=auto -fexceptions -fstack-protector-strong -fasynchronous-unwind-tables -fstack-clash-protection -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS $(pkg-config --cflags libtracefs) -c -o src/utils.o src/utils.c src/utils.c:548:66: warning: 'fscanf' may overflow; destination buffer in argument 3 has size 1024, but the corresponding specifier may require size 1025 [-Wfortify-source] 548 | while (fscanf(fp, "%*s %" STR(MAX_PATH) "s %99s %*s %*d %*d\n", mount_point, type) == 2) { | ^ Increase mount_point variable size to MAX_PATH+1 to avoid the overflow.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

CVE-2024-26818 concerns a Linux kernel rtla user-space tool buffer sizing issue found by clang. The available sources describe a fix for a possible overflow warning, not a remotely exploitable kernel flaw. Business urgency appears limited, but affected Linux builds should receive normal vendor/stable updates.

Executive priority

Handle as routine Linux maintenance, not an emergency, based on the current evidence. Escalate only if a vendor advisory assigns higher severity or identifies broader impact in packaged tooling.

Technical view

The issue is in Linux tools/rtla src/utils.c. An fscanf pattern could require MAX_PATH+1 bytes while mount_point was MAX_PATH bytes. The fix increases the destination buffer to MAX_PATH+1. The source bundle provides no CVSS, CWE, exploit detail, or impact beyond the compiler warning and stable commits.

Likely exposure

Exposure is likely limited to Linux systems using affected versions or source trees containing the vulnerable rtla tool code. The bundle lists Linux 6.5, 6.6.18, 6.7.6, and 6.8 as affected, but distribution package mapping is not provided.

Exploitation context

No active exploitation is supported by the provided sources. The CVE is not marked KEV, and the bundle includes no public exploit claims or weaponized details. Treat exploitation status as unconfirmed rather than active.

Researcher notes

Evidence is narrow: a compiler-detected fscanf destination-size issue in rtla and three Linux stable commits. There is no CVSS, CWE, detailed attack scenario, or distribution-level fix matrix in the supplied bundle.

Mitigation direction

  • Apply Linux vendor or stable updates that include the referenced rtla fixes.
  • Check distribution advisories for exact fixed kernel or tools package versions.
  • Prioritize systems where rtla tools are installed or used operationally.
  • Track this through routine Linux patch management unless vendor guidance raises severity.

Validation and detection

  • Inventory Linux versions and kernel-tools packages against vendor advisories.
  • Verify fixed packages include one of the referenced stable commits.
  • Confirm whether rtla is installed or accessible on managed systems.
  • Document that KEV status is false in the provided bundle.
Prepared
Confidence
medium
Sources
5

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.

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CVE-2024-26818 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
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.

0CVSS vectors
3Timeline events
2ADP providers
4Source links

SSVC decision data

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

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
other:ssvc
CVECVE Program Container

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinuxa957cbc02531a23beeac6dd9e751f8d4dadaf7a9, a957cbc02531a23beeac6dd9e751f8d4dadaf7a9, a957cbc02531a23beeac6dd9e751f8d4dadaf7a9unaffected
LinuxLinux6.5, 0, 6.6.18, 6.7.6, 6.8affected
Weakness

CWE details

No CWE listed

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