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Debian LinuxOperating system · Debian

CVE-2022-2521

MEDIUM · 6.5 CVSS v3.1 Published 2022-08-31
Patch available
A vendor patch is available. No clean upgrade release — apply the published patch.
See remediation →
72/100
Remediation priority · Elevated
Public exploit Remotely reachable No privileges Patch available

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
It was found in libtiff 4.4.0rc1 that there is an invalid pointer free operation in TIFFClose() at tif_close.c:131 called by tiffcrop.c:2522 that can cause a program crash and denial of service while processing crafted input.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis

A detailed technical summary for this CVE is being prepared.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Debian LinuxOperating system
Affected:= 11.0
LibtiffApplication
Affected:= 4.4.0

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

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

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Patch available Apply the vendor patch
Vendor patch gitlab.com →
Recommended fix Moderate confidence

Libtiff 4.5.0 or later (Debian 11 backports may also contain the fix in later point releases)

  1. 1. Identify the current libtiff version installed on the system using 'dpkg -l | grep libtiff' or 'tiffinfo -version'.
  2. 2. For Debian systems: Run 'apt-get update' followed by 'apt-get install libtiff5' to install the latest available version in Debian 11 (bullseye) repositories.
  3. 3. Alternatively, for the latest libtiff with the fix, download source code from https://gitlab.com/libtiff/libtiff/-/releases (version 4.5.0 or later recommended).
  4. 4. If building from source: Extract the archive, run './configure', 'make', and 'make install' as root.
  5. 5. After upgrade, verify the fix by running 'tiffinfo -version' to confirm the new version is active.
  6. 6. Restart any services using libtiff to ensure they load the updated library (e.g., 'systemctl restart <service>' if applicable).
Caveat Minor: Some legacy TIFF manipulation tools behavior may subtly change; test critical workflows after upgrade

Generated from the published advisory — verify against the referenced sources before acting.

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2022-2521 in production — separate from our analysis above.

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What this is

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What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
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