Improper Resource Shutdown or Release The advisory has been revoked - it doesn't affect any version of package re2c (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UBUNTU2510-RE2C-15356113
- published26 Feb 2026
- disclosed22 Feb 2026
Introduced: 22 Feb 2026
CVE-2026-2903 (opens in a new tab)Amendment
The Ubuntu security team deemed this advisory irrelevant for Ubuntu:25.10.
NVD Description
Note: Versions mentioned in the description apply only to the upstream re2c package and not the re2c package as distributed by Ubuntu.
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
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2026-2903
- https://github.com/oneafter/0202/blob/main/re/repro
- https://github.com/skvadrik/re2c/
- https://github.com/skvadrik/re2c/commit/febeb977936f9519a25d9fbd10ff8256358cdb97
- https://github.com/skvadrik/re2c/issues/571
- https://github.com/skvadrik/re2c/issues/571#issuecomment-3837675101
- https://vuldb.com/?ctiid.347210
- https://vuldb.com/?id.347210
- https://vuldb.com/?submit.755030