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CVE-2026-29644

XiangShan (open-source high-performance RISC-V processor) commit edb1dfaf7d290ae99724594507dc46c2c2125384 (2024-11-28) has improper gating of its distributed CSR write-enable path, allowing illegal CSR write attempts to alter custom PMA (Physical Memory Attribute) CSR state. Though the RISC-V privileged specification requires an illegal-instruction exception for non-existent/illegal CSR accesses, affected XiangShan versions may still propagate such writes to replicated PMA configuration state. L
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:e32f801ed8228609b962bf1e027b584d943bcbc0d847a61aaff7cf808e734368
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

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

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:01e3b828ce6201d4e8059aaea26dc90fb02d4c95de44b14302011683dde8e694 · sha256:c242db68327b3099… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-284","description":"CWE-284 Improper Access Control","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:01e3b828ce6201d4e8059aaea26dc90fb02d4c95de44b14302011683dde8e694 · sha256:c242db68327b3099… · /containers/adp/0/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:v2:01e3b828ce6201d4e8059aaea26dc90fb02d4c95de44b14302011683dde8e694 · sha256:c242db68327b3099… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"LOW","baseScore":5.3,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:01e3b828ce6201d4e8059aaea26dc90fb02d4c95de44b14302011683dde8e694 · sha256:c242db68327b3099… · /containers/adp/0/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"description":"n/a","lang":"en","type":"text"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:01e3b828ce6201d4e8059aaea26dc90fb02d4c95de44b14302011683dde8e694 · sha256:c242db68327b3099… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-284","description":"CWE-284 Improper Access Control","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:01e3b828ce6201d4e8059aaea26dc90fb02d4c95de44b14302011683dde8e694 · sha256:c242db68327b3099… · /containers/adp/0/problemTypes/0/descriptions/0

Source references

6 source assertions
{"url":"https://docs.riscv.org/reference/isa/priv/priv-csrs.html"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:01e3b828ce6201d4e8059aaea26dc90fb02d4c95de44b14302011683dde8e694 · sha256:c242db68327b3099… · /containers/cna/references/1
{"url":"https://github.com/OpenXiangShan/XiangShan/commit/2b1f9796aa98597e5eeac32e5bb1418496987ca4"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:01e3b828ce6201d4e8059aaea26dc90fb02d4c95de44b14302011683dde8e694 · sha256:c242db68327b3099… · /containers/cna/references/2
{"url":"https://github.com/OpenXiangShan/XiangShan/commit/edb1dfaf7d290ae99724594507dc46c2c2125384"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:01e3b828ce6201d4e8059aaea26dc90fb02d4c95de44b14302011683dde8e694 · sha256:c242db68327b3099… · /containers/cna/references/3
{"url":"https://github.com/OpenXiangShan/XiangShan/issues/3959"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:01e3b828ce6201d4e8059aaea26dc90fb02d4c95de44b14302011683dde8e694 · sha256:c242db68327b3099… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/OpenXiangShan/XiangShan/issues/3959"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:01e3b828ce6201d4e8059aaea26dc90fb02d4c95de44b14302011683dde8e694 · sha256:c242db68327b3099… · /containers/adp/0/references/0
{"url":"https://xiangshan-doc-test.readthedocs.io/next/memory/mmu/pmp_pma/"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:01e3b828ce6201d4e8059aaea26dc90fb02d4c95de44b14302011683dde8e694 · sha256:c242db68327b3099… · /containers/cna/references/4

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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