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CVE-2026-2903

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.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:7ae5ee4c8be1d9c4ce7e299fb2ec33c8180c610dc4fe545f3e59839cccb74572
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
2

Preserved source conflicts

No provider value was silently selected as the winner.

cvss · 4 assertions

{"metric":{"baseScore":3.3,"baseSeverity":"LOW","vectorString":"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":"3.0"},"metric_type":"cvssV3_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:48a477924111bd4293dafe75db8ad55e3c9c85798dc64a0876629c92a17f63d7 · sha256:666cf2ce8e447604… · /containers/cna/metrics/2/cvssV3_0

{"metric":{"baseScore":3.3,"baseSeverity":"LOW","vectorString":"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":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:48a477924111bd4293dafe75db8ad55e3c9c85798dc64a0876629c92a17f63d7 · sha256:666cf2ce8e447604… · /containers/cna/metrics/1/cvssV3_1

{"metric":{"baseScore":1.7,"vectorString":"AV:L/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:OF/RC:C","version":"2.0"},"metric_type":"cvssV2_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:48a477924111bd4293dafe75db8ad55e3c9c85798dc64a0876629c92a17f63d7 · sha256:666cf2ce8e447604… · /containers/cna/metrics/3/cvssV2_0

{"metric":{"baseScore":4.8,"baseSeverity":"MEDIUM","vectorString":"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":"4.0"},"metric_type":"cvssV4_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:48a477924111bd4293dafe75db8ad55e3c9c85798dc64a0876629c92a17f63d7 · sha256:666cf2ce8e447604… · /containers/cna/metrics/0/cvssV4_0
cwe · 2 assertions

{"cweId":"CWE-476","description":"NULL Pointer Dereference","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:48a477924111bd4293dafe75db8ad55e3c9c85798dc64a0876629c92a17f63d7 · sha256:666cf2ce8e447604… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-404","description":"Denial of Service","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:48a477924111bd4293dafe75db8ad55e3c9c85798dc64a0876629c92a17f63d7 · sha256:666cf2ce8e447604… · /containers/cna/problemTypes/1/descriptions/0

Affected products and versions

1 source assertion
{"cpes":["cpe:2.3:a:re2c:re2c:*:*:*:*:*:*:*:*"],"product":"re2c","vendor":"skvadrik","versions":[{"status":"affected","version":"4.0"},{"status":"affected","version":"4.1"},{"status":"affected","version":"4.2"},{"status":"affected","version":"4.3"},{"status":"affected","version":"4.4"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:48a477924111bd4293dafe75db8ad55e3c9c85798dc64a0876629c92a17f63d7 · sha256:666cf2ce8e447604… · /containers/cna/affected/0

Provider-owned CVSS observations

4 source assertions
{"metric":{"baseScore":3.3,"baseSeverity":"LOW","vectorString":"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":"3.0"},"metric_type":"cvssV3_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:48a477924111bd4293dafe75db8ad55e3c9c85798dc64a0876629c92a17f63d7 · sha256:666cf2ce8e447604… · /containers/cna/metrics/2/cvssV3_0
{"metric":{"baseScore":3.3,"baseSeverity":"LOW","vectorString":"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":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:48a477924111bd4293dafe75db8ad55e3c9c85798dc64a0876629c92a17f63d7 · sha256:666cf2ce8e447604… · /containers/cna/metrics/1/cvssV3_1
{"metric":{"baseScore":1.7,"vectorString":"AV:L/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:OF/RC:C","version":"2.0"},"metric_type":"cvssV2_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:48a477924111bd4293dafe75db8ad55e3c9c85798dc64a0876629c92a17f63d7 · sha256:666cf2ce8e447604… · /containers/cna/metrics/3/cvssV2_0
{"metric":{"baseScore":4.8,"baseSeverity":"MEDIUM","vectorString":"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":"4.0"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:48a477924111bd4293dafe75db8ad55e3c9c85798dc64a0876629c92a17f63d7 · sha256:666cf2ce8e447604… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

2 source assertions
{"cweId":"CWE-476","description":"NULL Pointer Dereference","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:48a477924111bd4293dafe75db8ad55e3c9c85798dc64a0876629c92a17f63d7 · sha256:666cf2ce8e447604… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-404","description":"Denial of Service","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:48a477924111bd4293dafe75db8ad55e3c9c85798dc64a0876629c92a17f63d7 · sha256:666cf2ce8e447604… · /containers/cna/problemTypes/1/descriptions/0

Source references

8 source assertions
{"tags":["exploit"],"url":"https://github.com/oneafter/0202/blob/main/re/repro"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:48a477924111bd4293dafe75db8ad55e3c9c85798dc64a0876629c92a17f63d7 · sha256:666cf2ce8e447604… · /containers/cna/references/5
{"tags":["product"],"url":"https://github.com/skvadrik/re2c/"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:48a477924111bd4293dafe75db8ad55e3c9c85798dc64a0876629c92a17f63d7 · sha256:666cf2ce8e447604… · /containers/cna/references/7
{"tags":["patch"],"url":"https://github.com/skvadrik/re2c/commit/febeb977936f9519a25d9fbd10ff8256358cdb97"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:48a477924111bd4293dafe75db8ad55e3c9c85798dc64a0876629c92a17f63d7 · sha256:666cf2ce8e447604… · /containers/cna/references/6
{"tags":["issue-tracking"],"url":"https://github.com/skvadrik/re2c/issues/571"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:48a477924111bd4293dafe75db8ad55e3c9c85798dc64a0876629c92a17f63d7 · sha256:666cf2ce8e447604… · /containers/cna/references/3
{"tags":["issue-tracking"],"url":"https://github.com/skvadrik/re2c/issues/571#issuecomment-3837675101"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:48a477924111bd4293dafe75db8ad55e3c9c85798dc64a0876629c92a17f63d7 · sha256:666cf2ce8e447604… · /containers/cna/references/4
{"name":"VDB-347210 | CTI Indicators (IOB, IOC, IOA)","tags":["signature","permissions-required"],"url":"https://vuldb.com/?ctiid.347210"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:48a477924111bd4293dafe75db8ad55e3c9c85798dc64a0876629c92a17f63d7 · sha256:666cf2ce8e447604… · /containers/cna/references/1
{"name":"VDB-347210 | skvadrik re2c ast.cc check_and_merge_special_rules null pointer dereference","tags":["vdb-entry","technical-description"],"url":"https://vuldb.com/?id.347210"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:48a477924111bd4293dafe75db8ad55e3c9c85798dc64a0876629c92a17f63d7 · sha256:666cf2ce8e447604… · /containers/cna/references/0
{"name":"Submit #755030 | skvadrik re2c 04f1424 NULL Pointer Dereference","tags":["third-party-advisory"],"url":"https://vuldb.com/?submit.755030"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:48a477924111bd4293dafe75db8ad55e3c9c85798dc64a0876629c92a17f63d7 · sha256:666cf2ce8e447604… · /containers/cna/references/2

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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