util-linux is a random collection of Linux utilities. Before util-linux 2.41.4, parse_dos_extended() in libblkid/src/partitions/dos.c computes an extended-partition start sector with 32-bit addition and does not apply the extended-area bounds checks to the first two EBR entries. A local attacker who causes a crafted DOS extended-partition disk image or removable medium to be probed can wrap cur_start + start to sector zero and cause libblkid to report a false partition overlapping the MBR. This directly compromises the integrity of the reported partition metadata; disk modification or availability loss requires a separate downstream consumer to act on that metadata. This issue is fixed in 2.41.4.
CVE-2026-53615
HIGHPre-NVD 8.08.0Trending — 4 sources updated this week
EchelonGraph scoreLOW confidence
This high-severity CVE scores 8.0 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2% (6th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.
Triggered by: Headline CVSS from a secondary CVSS source
Sources: a secondary CVSS source
8.0EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 8.0Exploit: None knownExposed services: Not assessed
A fix is available — apply it.
- CVSS v3
- 8.0
- EG Score
- 8.0HIGHlow confidence
- EG Risk
- 36EG Risk 36/100
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computed (value × EchelonGraph’s weight)Severity80% × 45%The EG Score, 8.0 of 10.Exploitation0% × 40%No KEV listing, EG-KEV tier or EPSS when EchelonGraph scored this CVE.Automatability0% × 15%CISA's SSVC Automatable value: no (Vulnrichment).SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.Action: A fix is available. Apply it within your standard update timelines. - EPSS PROB
- 0.2%
- EPSS %ILE
- 6th
- KEV
- Not listed
SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.
A fix is available. Apply it within your standard update timelines.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table
BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.
In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it
Published
October 14, 2026
Last Modified
October 15, 2026
Advisory Details (4)
Auto-updated Oct 14, 2026Patch available. Sources: github, github_commit.
GitHub commit
commit e9d544d01326 (util-linux/util-linux)
Fix landed in util-linux/util-linux commit e9d544d01326 — awaiting tagged release
https://github.com/util-linux/util-linux/commit/e9d544d013267ea86b70ee8ff78abd280e6641afGitHub commit
commit a2d858176b60 (util-linux/util-linux)
Fix landed in util-linux/util-linux commit a2d858176b60 — awaiting tagged release
https://github.com/util-linux/util-linux/commit/a2d858176b609ab5b8535021a3af9cd302d23d31GitHub commit
commit 05c2dbadf34c (util-linux/util-linux)
Fix landed in util-linux/util-linux commit 05c2dbadf34c — awaiting tagged release
https://github.com/util-linux/util-linux/commit/05c2dbadf34cc74192287f377904afaaf4061623GitHub advisoryMentions a patch (unverified)
Integer Overflow or Wraparound in libblkid/src/partitions/dos.c · Advisory · util-linux/util-linux · GitHub
https://github.com/util-linux/util-linux/security/advisories/GHSA-h4rw-gv36-wmp5Vendor Advisories for CVE-2026-53615(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Patch Availability(1)
| Vendor / Ecosystem | Fix (by version range) / Patch | Released | Source |
|---|---|---|---|
| ubuntu | uuid-runtime (2.41.3-3ubuntu2.2) @ resolute | 2026-10-15 | ubuntu |
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
All Vendor Advisories
(1)
Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.
Data Freshness Timeline
(refreshed 10× in last 7d / 10× in last 30d)
Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.
- 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.2% · 6th percentile
- 2026-10-15 16:30 UTCEG score recompute
- 2026-10-15 16:30 UTCVendor advisory
- 2026-10-15 15:23 UTCEG score recompute
- 2026-10-15 15:23 UTCVendor advisory
- 2026-10-14 17:13 UTCEG score recompute
- 2026-10-14 17:13 UTCVendor advisory
- 2026-10-14 16:00 UTCEG score recomputeFirst assessed: 8.0 HIGH
- 2026-10-14 16:00 UTCVendor advisory
- 2026-10-14 15:59 UTCMITRE cvelistV5first tracked
Related CVEs(same vendor + same CWE)
Same vendor
4 shownubuntu:USN-8702-1
Frequently asked(5)
What is CVE-2026-53615?
CVE-2026-53615 is a high-severity vulnerability; its CVE record was published on October 14, 2026. util-linux is a random collection of Linux utilities. Before util-linux 2.41.4, parsedosextended() in libblkid/src/partitions/dos.c computes an extended-partition start sector with 32-bit addition and does not apply the extended-area bounds checks to the first two EBR entries. A local attacker who…
When was the CVE record for CVE-2026-53615 published?
The CVE record for CVE-2026-53615 was published on October 14, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of October 15, 2026; the record at its source may have been updated since.
Is CVE-2026-53615 actively exploited?
CVE-2026-53615 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (6th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-53615?
CVE-2026-53615 has a CVSS base score of 8.0 (a secondary CVSS source that NVD displays; NVD's own analysis pending). The EG score is currently aggregating — additional source signals are being incorporated as they become available..
How do I remediate CVE-2026-53615?
A fix for CVE-2026-53615 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-53615 are linked in the Vendor Advisories panel on this page.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-53615
Is Your Infrastructure Affected by CVE-2026-53615?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.