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Vim EUVDEUVD-2026-39441

| CVE-2026-57454 MEDIUM
Out-of-bounds Read (CWE-125)
2026-06-25 GitHub_M
Buffer Overflow Information Disclosure Vim Red Hat Suse
6.8
CVSS 4.0 · Vendor: GitHub_M
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Severity by source

Vendor (GitHub_M) PRIMARY
6.8 MEDIUM
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vuln.today AI
6.1 MEDIUM

Local vector because exploitation requires a crafted file on the local filesystem; user interaction required to open the file; no integrity impact; low confidentiality from bounded heap read; high availability from crash.

3.1 AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
4.0 AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N
SUSE
6.1 MEDIUM
AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
Red Hat
MEDIUM
qualitative

Primary rating from Vendor (GitHub_M).

CVSS VectorVendor: GitHub_M

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
A
Scope
X

Lifecycle Timeline

3
Patch available
Jun 25, 2026 - 17:02 EUVD
Source Code Evidence Fetched
Jun 25, 2026 - 16:24 vuln.today
Analysis Generated
Jun 25, 2026 - 16:24 vuln.today

DescriptionCVE.org

Vim is an open source, command line text editor. From 9.2.0320 until 9.2.0679, a crafted undo or swap file can store a virtual-text property whose offset and length point outside the line's property data. When Vim restores or displays such a line it converts the offset into a pointer and reads the virtual text without bounds checking, causing an out-of-bounds read that can crash Vim or disclose adjacent heap memory. This vulnerability is fixed in 9.2.0679.

AnalysisAI

Out-of-bounds heap read in Vim 9.2.0320-9.2.0678 allows a crafted undo or swap file to disclose adjacent heap memory or crash the editor when a victim opens it. The flaw resides in the text property (textprop) subsystem: a maliciously encoded virtual-text property with an oversized tp_text_offset is converted directly to a heap pointer without bounds validation in both the undo-restoration path (um_goto_line) and the display path (get_text_props). …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Recon
Craft textprop_T blob with out-of-range tp_text_offset
Delivery
Embed in .un~ undo or swap file
Exploit
Deliver file to target directory
Install
Victim opens associated file in Vim
C2
Vim restores undo history, dereferences crafted offset
Execute
OOB heap read
Impact
Crash (VA:H) or adjacent heap disclosure (VC:L)
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Vulnerability AssessmentAI

Exploitation Exploitation requires all of the following: (1) the target system runs Vim 9.2.0320-9.2.0678 compiled with the persistent_undo feature - standard in major distribution builds, confirmed by the test's CheckFeature persistent_undo guard; (2) a crafted undo file (.FILENAME.un~) or swap file is present on the filesystem at the path Vim will automatically probe when opening the associated base file; (3) the user actively opens that base file in Vim, triggering undo history restoration via um_goto_line() or virtual-text rendering via get_text_props(). … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 score of 6.8 accurately characterizes a moderate but not critical real-world risk. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker embeds a crafted .FILENAME.un~ undo file alongside a legitimate file in a shared repository or archive download; the undo blob contains a single textprop_T entry with tp_id set to -1 (virtual text) and tp_text_offset set to 0x00100000 - far beyond the 34-byte property data. When a developer checks out the repository and opens the file in a vulnerable Vim, Vim automatically loads the undo file, restores the crafted line via um_goto_line(), and dereferences the out-of-range offset as a heap pointer, reading up to tp_len bytes of adjacent heap content (potentially exposing in-memory buffer contents or credentials) or crashing the editor. …
Remediation Vendor-released patch: Vim 9.2.0679, available at https://github.com/vim/vim/releases/tag/v9.2.0679; the underlying fix commit is https://github.com/vim/vim/commit/b3faeecc976d3031d7c0675623516ec60c30f949. … Detailed patch versions, workarounds, and compensating controls in full report.
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Threat intelligence, references, and detailed analysis are available after sign-in.

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Same weakness CWE-125 – Out-of-bounds Read

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Vendor StatusVendor

SUSE

Severity: Moderate
Product Status
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EUVD-2026-39441 vulnerability details – vuln.today
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