Description
A flaw has been found in skvadrik re2c up to 4.4. Impacted is the function check_and_merge_special_rules of the file src/parse/ast.cc. This manipulation causes null pointer dereference. The attack can only be executed locally. The exploit has been published and may be used. Patch name: febeb977936f9519a25d9fbd10ff8256358cdb97. It is suggested to install a patch to address this issue.
References (8)
Core 8
Core References
Permissions Required, VDB Entry vdb-entry
technical-description
https://vuldb.com/?id.347210
Permissions Required, VDB Entry signature
permissions-required
https://vuldb.com/?ctiid.347210
Permissions Required, VDB Entry third-party-advisory
https://vuldb.com/?submit.755030
Issue Tracking issue-tracking
https://github.com/skvadrik/re2c/issues/571
Issue Tracking issue-tracking
https://github.com/skvadrik/re2c/issues/571#issuecomment-3837675101
Various Sources product
https://github.com/skvadrik/re2c/
Scores
CVSS v3
3.3
EPSS
0.0011
EPSS Percentile
1.7%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
partial
Details
CWE
CWE-404
CWE-476
Status
published
Products (5)
skvadrik/re2c
4.0
skvadrik/re2c
4.1
skvadrik/re2c
4.2
skvadrik/re2c
4.3
skvadrik/re2c
4.4
Published
Feb 22, 2026
Tracked Since
Feb 22, 2026