CVE-2025-55158 — Vim double-free vulnerability during Vim9 script import operations

Description

Vim is an open source, command line text editor. In versions from 9.1.1231 to before 9.1.1406, when processing nested tuples during Vim9 script import operations, an error during evaluation can trigger a double-free in Vim’s internal typed value (typval_T) management. Specifically, the clear_tv() function may attempt to free memory that has already been deallocated, due to improper lifetime handling in the handle_import / ex_import code paths. The vulnerability can only be triggered if a user explicitly opens and executes a specially crafted Vim script. This issue has been patched in version 9.1.1406.

Affected products

Vendor	Product	Affected	Fixed
vim	vim	>= 9.1.1231, < 9.1.1406	—

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

SUSE

Security tracker ↗

Release	Package	Fixed in	Advisory
SLES 15 SP7	vim	9.1.1629-150500.20.33.1	SUSE-SU-2025:03300-1
SLES 15 SP6	vim	9.1.1629-150500.20.33.1	SUSE-SU-2025:03300-1
SLES 12 SP5	vim	9.1.1629-17.51.1	SUSE-SU-2025:03299-1

Show 7 more (older releases, extended support, other products)

Release	Package	Fixed in	Advisory
SLE Micro 6.1	vim	9.1.1629-slfo.1.1_1.1	SUSE-SU-2025:20857-1
SLE Micro 6.0	vim	9.1.1629-1.1	SUSE-SU-2025:20696-1
SLE Micro 5.5	vim	9.1.1629-150500.20.33.1	SUSE-SU-2025:03300-1
SLE Micro 5.4	vim	9.1.1629-150000.5.78.1	SUSE-SU-2025:03240-1
SLE Micro 5.3	vim	9.1.1629-150000.5.78.1	SUSE-SU-2025:03240-1
SLE Micro 5.2	vim	9.1.1629-150000.5.78.1	SUSE-SU-2025:03240-1
SLE Micro 5.1	vim	9.1.1629-150000.5.78.1	SUSE-SU-2025:03240-1

openSUSE