CVE-2026-13595

MEDIUMNVD 5.36.8
EchelonGraph scoreMEDIUM confidence

“▲” beside the score: it is higher than NVD's CVSS score.

Score 6.8 from GitHub Security Advisory published 2026-06-29. NVD baseline CVSS 5.3; sources differ by 1.5.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
Trending — 4 sources updated this week

Also known asEUVD-2026-40053 (ENISA EUVD) · GHSA-qpmf-9p9c-455w (GitHub Security Advisories)Source: ENISA EUVD

6.8EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.1%CVSS: 5.3Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

A flaw was found in the libblkid library of util-linux. During nested partition probing, the BSD, Minix, Solaris x86, and UnixWare partition probers cache a raw pointer to a parent partition entry in a dynamically allocated array. When subsequent partition additions cause the array to be reallocated, this pointer becomes stale, leading to a heap use-after-free read. An attacker who can present a crafted block device image (for example, via USB insertion or a loop-mounted disk image) can trigger this flaw without user interaction, as libblkid is invoked automatically by udev/udisks as root on block-device hot-plug events. This could lead to limited information disclosure or denial of service.

CVSS v3
5.3
EG Score
6.8MEDIUMmedium confidence
EG Risk
31
EG Risk 31/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity68% × 45%
Impact severity (EG Severity): CVSS 6.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.1% × 40%
FIRST EPSS: the 30-day exploitation probability 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
0.1%
EPSS %ILE
3rd
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (6.8): severity, escalated by confirmed exploitation. This CVE's 6.8 is its impact severity (EG Severity), not escalated.

EG Severity
6.8 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.1% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-29). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.

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

June 29, 2026

Last Modified

October 30, 2026

Advisory Details (3)

Auto-updated Jun 29, 2026
Patch available. Sources: redhat, github_commit.
GitHub commit

commit c0186f14fbdb (util-linux/util-linux)

Fix landed in util-linux/util-linux commit c0186f14fbdb — awaiting tagged release

https://github.com/util-linux/util-linux/commit/c0186f14fbdb02f64c8e0ba701ce727ea764ff4c
Red Hat

2494101 – (CVE-2026-13595) CVE-2026-13595 util-linux: util-linux: heap use-after-free in libblkid nested partition probing

https://bugzilla.redhat.com/show_bug.cgi?id=2494101
Red HatMentions a patch (unverified)

cve-details

https://access.redhat.com/security/cve/CVE-2026-13595

Patch Availability(2)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntuuuid-runtime (2.41.3-3ubuntu2.2) @ resolute2026-10-30ubuntu
redhatutil-linux-main-2.42.2-1.hum12026-06-17redhat

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.

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
util-linux2.36.1-8 ... 2.42~rc2-1 (140 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
util-linux2.38.1-5 ... 2.42~rc2-1 (120 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
util-linux2.41-5 ... 2.41.3-4 (13 versions)
  • every version up to 2.41.5-0+deb13u1: fixed in 2.41.5-0+deb13u1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
util-linux2.41-5 ... 2.42~rc2-1 (29 versions)
  • every version up to 2.42.2-1: fixed in 2.42.2-1
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(1)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 13× in last 7d / 42× 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.

Showing the most recent 100 of 258 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 158 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-30 16:33 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  2. 2026-10-30 14:26 UTCVendor advisory
  3. 2026-10-30 14:26 UTCGHSA enrichmentGHSA-qpmf-9p9c-455w · GitHub CVSS 6.8
  4. 2026-10-30 14:00 UTCEG score recompute
  5. 2026-10-30 14:00 UTCVendor advisory
  6. 2026-10-30 14:00 UTCGHSA enrichmentGHSA-qpmf-9p9c-455w · GitHub CVSS 6.8
  7. 2026-10-29 16:32 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  8. 2026-10-28 16:31 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  9. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  10. 2026-10-26 16:30 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  11. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  12. 2026-10-25 14:48 UTCEG score recompute
  13. 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  14. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  15. 2026-10-23 06:48 UTCEG score recompute
  16. 2026-10-23 06:48 UTCVendor advisory
  17. 2026-10-23 06:48 UTCGHSA enrichmentGHSA-qpmf-9p9c-455w · GitHub CVSS 6.8
  18. 2026-10-22 16:33 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  19. 2026-10-21 16:32 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  20. 2026-10-20 16:32 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  21. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  22. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  23. 2026-10-18 05:03 UTCEG score recompute
  24. 2026-10-16 16:40 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  25. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.2% · 5th percentile
Show 75 more
  1. 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  2. 2026-10-13 18:54 UTCOSV refresh
  3. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  4. 2026-10-12 16:35 UTCEG score recompute
  5. 2026-10-11 20:11 UTCEG score recompute
  6. 2026-10-11 18:23 UTCEG score recompute
  7. 2026-10-11 14:57 UTCEG score recompute
  8. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  9. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  10. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  11. 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  12. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  13. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  14. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  15. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  16. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  17. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  18. 2026-09-30 15:02 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  19. 2026-09-29 15:20 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  20. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  21. 2026-09-27 13:47 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  22. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  23. 2026-09-23 13:47 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  24. 2026-09-23 07:34 UTCEG score recompute
  25. 2026-09-23 07:34 UTCVendor advisory
  26. 2026-09-23 07:34 UTCGHSA enrichmentGHSA-qpmf-9p9c-455w · GitHub CVSS 6.8
  27. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  28. 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  29. 2026-09-18 07:02 UTCEG score recompute
  30. 2026-09-18 07:02 UTCVendor advisory
  31. 2026-09-18 07:02 UTCGHSA enrichmentGHSA-qpmf-9p9c-455w · GitHub CVSS 6.8
  32. 2026-09-16 05:14 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  33. 2026-09-14 00:53 UTCEG score recompute
  34. 2026-09-14 00:53 UTCVendor advisory
  35. 2026-09-14 00:53 UTCGHSA enrichmentGHSA-qpmf-9p9c-455w · GitHub CVSS 6.8
  36. 2026-09-13 16:46 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  37. 2026-09-12 15:16 UTCEG score recompute
  38. 2026-09-12 15:16 UTCVendor advisory
  39. 2026-09-12 15:16 UTCGHSA enrichmentGHSA-qpmf-9p9c-455w · GitHub CVSS 6.8
  40. 2026-09-12 15:00 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  41. 2026-09-11 14:52 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  42. 2026-09-11 09:36 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  43. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  44. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  45. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  46. 2026-09-06 14:46 UTCEG score recompute
  47. 2026-09-06 14:46 UTCVendor advisory
  48. 2026-09-06 14:46 UTCGHSA enrichmentGHSA-qpmf-9p9c-455w · GitHub CVSS 6.8
  49. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  50. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  51. 2026-09-02 14:11 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  52. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  53. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  54. 2026-08-31 18:36 UTCVendor advisory
  55. 2026-08-31 18:36 UTCGHSA enrichmentGHSA-qpmf-9p9c-455w · GitHub CVSS 6.8
  56. 2026-08-31 17:32 UTCVendor advisory
  57. 2026-08-31 17:31 UTCGHSA enrichmentGHSA-qpmf-9p9c-455w · GitHub CVSS 6.8
  58. 2026-08-31 16:22 UTCEG score recompute
  59. 2026-08-31 16:22 UTCVendor advisory
  60. 2026-08-31 16:22 UTCGHSA enrichmentGHSA-qpmf-9p9c-455w · GitHub CVSS 6.8
  61. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  62. 2026-08-30 18:57 UTCEG score recompute
  63. 2026-08-30 18:57 UTCVendor advisory
  64. 2026-08-30 18:57 UTCGHSA enrichmentGHSA-qpmf-9p9c-455w · GitHub CVSS 6.8
  65. 2026-08-28 21:40 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  66. 2026-08-27 22:48 UTCEG score recompute
  67. 2026-08-27 22:48 UTCVendor advisory
  68. 2026-08-27 22:48 UTCGHSA enrichmentGHSA-qpmf-9p9c-455w · GitHub CVSS 6.8
  69. 2026-08-27 14:24 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  70. 2026-08-25 13:48 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  71. 2026-08-24 15:14 UTCEG score recompute
  72. 2026-08-24 15:14 UTCVendor advisory
  73. 2026-08-24 15:14 UTCGHSA enrichmentGHSA-qpmf-9p9c-455w · GitHub CVSS 6.8
  74. 2026-08-23 14:35 UTCEG score recompute
  75. 2026-08-23 14:35 UTCVendor advisory

Frequently asked(5)

What is CVE-2026-13595?
CVE-2026-13595 is a medium-severity vulnerability; its CVE record was published on June 29, 2026. A flaw was found in the libblkid library of util-linux. During nested partition probing, the BSD, Minix, Solaris x86, and UnixWare partition probers cache a raw pointer to a parent partition entry in a dynamically allocated array. When subsequent partition additions cause the array to be…
When was CVE-2026-13595 made public?
CVE-2026-13595 was made public on May 7, 2026: that is the date its CVE record's CNA, Red Hat, Inc., gives for when the vulnerability was made public. The CVE record itself was published on June 29, 2026. EchelonGraph's copy of the record carries a last-modified date of October 30, 2026; the record at its source may have been updated since.
Is CVE-2026-13595 actively exploited?
CVE-2026-13595 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (3rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-13595?
CVE-2026-13595 has a CVSS v3 base score of 5.3 (NVD). EchelonGraph synthesises NVD + FIRST EPSS + GHSA into a combined EG score of 6.8 (MEDIUM).
How do I remediate CVE-2026-13595?
A fix for CVE-2026-13595 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-13595 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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