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CVE Vulnerability Details :
CVE-2026-2903
PUBLISHED
More InfoOfficial Page
Assigner-VulDB
Assigner Org ID-1af790b2-7ee1-4545-860a-a788eba489b5
View Known Exploited Vulnerability (KEV) details
Published At-22 Feb, 2026 | 00:32
Updated At-26 Feb, 2026 | 16:21
Rejected At-
▼CVE Numbering Authority (CNA)
skvadrik re2c ast.cc check_and_merge_special_rules null pointer dereference

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.

Affected Products
Vendor
skvadrik
Product
re2c
CPEs
  • cpe:2.3:a:re2c:re2c:*:*:*:*:*:*:*:*
Versions
Affected
  • 4.0
  • 4.1
  • 4.2
  • 4.3
  • 4.4
Problem Types
TypeCWE IDDescription
CWECWE-476NULL Pointer Dereference
CWECWE-404Denial of Service
Type: CWE
CWE ID: CWE-476
Description: NULL Pointer Dereference
Type: CWE
CWE ID: CWE-404
Description: Denial of Service
Metrics
VersionBase scoreBase severityVector
4.04.8MEDIUM
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
3.13.3LOW
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C
3.03.3LOW
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C
2.01.7N/A
AV:L/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:OF/RC:C
Version: 4.0
Base score: 4.8
Base severity: MEDIUM
Vector:
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
Version: 3.1
Base score: 3.3
Base severity: LOW
Vector:
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C
Version: 3.0
Base score: 3.3
Base severity: LOW
Vector:
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C
Version: 2.0
Base score: 1.7
Base severity: N/A
Vector:
AV:L/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:OF/RC:C
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
reporter
Oneafter (VulDB User)
Timeline
EventDate
Advisory disclosed2026-02-20 00:00:00
VulDB entry created2026-02-20 01:00:00
VulDB entry last update2026-02-20 21:07:45
Event: Advisory disclosed
Date: 2026-02-20 00:00:00
Event: VulDB entry created
Date: 2026-02-20 01:00:00
Event: VulDB entry last update
Date: 2026-02-20 21:07:45
Replaced By
Rejected Reason
References
HyperlinkResource
https://vuldb.com/?id.347210
vdb-entry
technical-description
https://vuldb.com/?ctiid.347210
signature
permissions-required
https://vuldb.com/?submit.755030
third-party-advisory
https://github.com/skvadrik/re2c/issues/571
issue-tracking
https://github.com/skvadrik/re2c/issues/571#issuecomment-3837675101
issue-tracking
https://github.com/oneafter/0202/blob/main/re/repro
exploit
https://github.com/skvadrik/re2c/commit/febeb977936f9519a25d9fbd10ff8256358cdb97
patch
https://github.com/skvadrik/re2c/
product
Hyperlink: https://vuldb.com/?id.347210
Resource:
vdb-entry
technical-description
Hyperlink: https://vuldb.com/?ctiid.347210
Resource:
signature
permissions-required
Hyperlink: https://vuldb.com/?submit.755030
Resource:
third-party-advisory
Hyperlink: https://github.com/skvadrik/re2c/issues/571
Resource:
issue-tracking
Hyperlink: https://github.com/skvadrik/re2c/issues/571#issuecomment-3837675101
Resource:
issue-tracking
Hyperlink: https://github.com/oneafter/0202/blob/main/re/repro
Resource:
exploit
Hyperlink: https://github.com/skvadrik/re2c/commit/febeb977936f9519a25d9fbd10ff8256358cdb97
Resource:
patch
Hyperlink: https://github.com/skvadrik/re2c/
Resource:
product
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Details not found