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CVE-2026-29643

XiangShan (Open-source high-performance RISC-V processor) commit edb1dfaf7d290ae99724594507dc46c2c2125384 (2024-11-28) contains an improper exceptional-condition handling flaw in its CSR subsystem (NewCSR). On affected versions, certain sequences of CSR operations targeting non-existent/custom CSR addresses may trigger an illegal-instruction exception but fail to reliably transfer control to the configured trap handler (mtvec), causing control-flow disruption and potentially leaving the core in
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:60ea3f42341bed0007620398c2d67a90263ab7403971c3c70f8defd4858cfc4e
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-703","description":"CWE-703 Improper Check or Handling of Exceptional Conditions","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:64c13c94ab38584d6f7d232ee225b5d78b56d64cf91fe06215a98e59209580ba · sha256:6cee32a6732c4a1f… · /containers/adp/0/problemTypes/0/descriptions/0

{"description":"n/a","lang":"en","type":"text"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:64c13c94ab38584d6f7d232ee225b5d78b56d64cf91fe06215a98e59209580ba · sha256:6cee32a6732c4a1f… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"product":"n/a","vendor":"n/a","versions":[{"status":"affected","version":"n/a"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:64c13c94ab38584d6f7d232ee225b5d78b56d64cf91fe06215a98e59209580ba · sha256:6cee32a6732c4a1f… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":7.1,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:64c13c94ab38584d6f7d232ee225b5d78b56d64cf91fe06215a98e59209580ba · sha256:6cee32a6732c4a1f… · /containers/adp/0/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-703","description":"CWE-703 Improper Check or Handling of Exceptional Conditions","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:64c13c94ab38584d6f7d232ee225b5d78b56d64cf91fe06215a98e59209580ba · sha256:6cee32a6732c4a1f… · /containers/adp/0/problemTypes/0/descriptions/0
{"description":"n/a","lang":"en","type":"text"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:64c13c94ab38584d6f7d232ee225b5d78b56d64cf91fe06215a98e59209580ba · sha256:6cee32a6732c4a1f… · /containers/cna/problemTypes/0/descriptions/0

Source references

5 source assertions
{"url":"https://docs.riscv.org/reference/isa/priv/machine.html"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:64c13c94ab38584d6f7d232ee225b5d78b56d64cf91fe06215a98e59209580ba · sha256:6cee32a6732c4a1f… · /containers/cna/references/3
{"url":"https://docs.riscv.org/reference/isa/priv/priv-csrs.html"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:64c13c94ab38584d6f7d232ee225b5d78b56d64cf91fe06215a98e59209580ba · sha256:6cee32a6732c4a1f… · /containers/cna/references/2
{"url":"https://github.com/OpenXiangShan/XiangShan/issues/3959"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:64c13c94ab38584d6f7d232ee225b5d78b56d64cf91fe06215a98e59209580ba · sha256:6cee32a6732c4a1f… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/OpenXiangShan/XiangShan/issues/3959"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:64c13c94ab38584d6f7d232ee225b5d78b56d64cf91fe06215a98e59209580ba · sha256:6cee32a6732c4a1f… · /containers/adp/0/references/0
{"url":"https://github.com/OpenXiangShan/XiangShan/pull/3966"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:64c13c94ab38584d6f7d232ee225b5d78b56d64cf91fe06215a98e59209580ba · sha256:6cee32a6732c4a1f… · /containers/cna/references/1

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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