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libical through 4.0.6 Heap Out-of-Bounds Read via icalvalue_decode_ical_string

Assessment

Severity
Moderate
CVSS base score
6.1CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
Impact
Not stated
EPSS, next 30 days
Not scored yet
Public exploit code
No Nuclei template lists it
Exploitability
Not assessed
Publicly disclosed
No
Customer action
Required: apply the update
Component
Mariner
Weakness
CWE-125: Out-of-bounds Read
Issued by
VulnCheck
Published
17 Oct 2026 · October 2026
Last revised
24 Oct 2026Information published.
CVSS 3.1 base metricsRed raises the risk · green lowers it
Attack vector
LocalAV:L
Attack complexity
LowAC:L
Privileges required
NonePR:N
User interaction
RequiredUI:R
Scope
UnchangedS:U
Confidentiality
LowC:L
Integrity
NoneI:N
Availability
HighA:H

Updates that fix it

0 KBs

No KB listed

MSRC lists no downloadable update, which usually means a service-side fix or a release-notes update. Check the MSRC advisory.

Affected products

Open Source Software
1 affected product
  • azl3 libical 3.0.10-1 on Azure Linux 3.0

What changed

  1. Affected products: azl3 httpd 2.4.68-1 on Azure Linux 3.0 → azl3 libical 3.0.10-1 on Azure Linux 3.0
  2. Public exploit code: Unknown: exploit-code evidence is incomplete or retained → No Nuclei template listed · CISA KEV: Unknown: catalog evidence is incomplete or retained → Not listed in the collected catalog
  3. Public exploit code: No Nuclei template listed → Unknown: exploit-code evidence is incomplete or retained · CISA KEV: Not listed in the collected catalog → Unknown: catalog evidence is incomplete or retained
Page history

Changes are dated when recorded; day views use the last saved version from that UTC day, and citations stay fixed.

Cite this version
Field-level log (15)

Up to 100 recent field edits are shown; older edits may be outside retention.

  1. 26 Oct 2026 · 07:26:10 UTC Affected productsazl3 httpd 2.4.68-1 on Azure Linux 3.0 → azl3 libical 3.0.10-1 on Azure Linux 3.0
  2. 24 Oct 2026 · 07:49:07 UTC Last revised17 Oct 2026 01:01 UTC → 24 Oct 2026 01:46 UTC
  3. 23 Oct 2026 · 09:33:49 UTC Public exploit codeUnknown: exploit-code evidence is incomplete or retained → No Nuclei template listed
  4. 23 Oct 2026 · 09:33:49 UTC CISA KEVUnknown: catalog evidence is incomplete or retained → Not listed in the collected catalog
  5. 23 Oct 2026 · 09:33:49 UTC Source coverage: public-exploit-codeIncomplete → Current
  6. 23 Oct 2026 · 09:33:49 UTC Source coverage: first-epssIncomplete → Current
  7. 23 Oct 2026 · 09:33:49 UTC Source coverage: cisa-kevIncomplete → Current
  8. 23 Oct 2026 · 09:33:49 UTC Source coverage: msrc-cvrfIncomplete → Current
  9. 23 Oct 2026 · 08:31:50 UTC Public exploit codeNo Nuclei template listed → Unknown: exploit-code evidence is incomplete or retained
  10. 23 Oct 2026 · 08:31:50 UTC CISA KEVNot listed in the collected catalog → Unknown: catalog evidence is incomplete or retained
  11. 23 Oct 2026 · 08:31:50 UTC Source coverage: public-exploit-codeCurrent → Incomplete
  12. 23 Oct 2026 · 08:31:50 UTC Source coverage: first-epssCurrent → Incomplete
  13. 23 Oct 2026 · 08:31:50 UTC Source coverage: cisa-kevCurrent → Incomplete
  14. 23 Oct 2026 · 08:31:50 UTC Source coverage: msrc-cvrfCurrent → Incomplete
  15. 18 Oct 2026 · 14:54:30 UTC Link: October 2026/security?release=2026-Oct#cves

Explore global source statements, affected packages and advisory history for CVE-2026-111269. The catalog has a separate collection scope from Microsoft release records.

Collected exploitation and prediction evidence

Risk source coverage

CISA KEV is observed exploitation evidence. FIRST EPSS is a dated prediction of exploitation in the next 30 days. Missing scores are unknown. This collector requests predictions only for explicit CVE aliases in the public NuGet archive; Microsoft release views retain their existing prediction scope.

No collected risk observation for these identifiers. This does not establish absence of exploitation or a zero probability.

cve-program · CVE-2026-111269

Published

libical through 4.0.6 Heap Out-of-Bounds Read via icalvalue_decode_ical_string

libical through 4.0.6 contains a heap-based out-of-bounds read in icalvalue_decode_ical_string() in src/libical/icalvalue.c when decoding input ending in a backslash. Attackers can supply escaped iCalendar text with a trailing backslash, causing the loop to read past the terminator and crash the application or leak adjacent heap memory.

Source published
15 Oct 2026 21:43:16 UTC
Source modified
26 Oct 2026 14:15:58 UTC
Observed here
26 Oct 2026 15:35:30 UTC
Source terms
CVE Program Terms of Use

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: cve-program · CVE Program Terms of Use. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS 4.0 · 6.9 CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N

CVSS 3.1 · 6.1 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H

ChangeIntel

An IT change radar: releases, security, known issues, retirements, documentation changes, and service status from public sources. Every item links to supporting evidence; dates and statuses can change after they are read.

Sources read 28 Oct 09:38 UTC · 272 of 272 readable · 268 fully read · documentation 469/469 current