Memory corruption via undersized counter map
Published Aug 28, 2026 · Updated Aug 28, 2026
A slab out-of-bounds write in Linux kernel 5.11 allows attackers to cause unspecified impact via unspecified vectors. During CPT second-pass setup, npc_map_mcam_entry_and_cntr writes a two-byte counter mapping for a reserved MCAM entry beyond entry2cntr_map, whose allocation excludes reserved entries. The disclosure identifies initialization on Marvell CN106XX hardware but identifies neither an attacker-controlled trigger nor a consequence beyond detected memory corruption.
Summary
What happened
A slab out-of-bounds write in Linux kernel 5.11 allows attackers to cause unspecified impact via unspecified vectors. During CPT second-pass setup, npc_map_mcam_entry_and_cntr writes a two-byte counter mapping for a reserved MCAM entry beyond entry2cntr_map, whose allocation excludes reserved entries. The disclosure identifies initialization on Marvell CN106XX hardware but identifies neither an attacker-controlled trigger nor a consequence beyond detected memory corruption.
The record
- CVE
- CVE-2026-80629
- Published
- Aug 28, 2026
- Updated
- Aug 28, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- Unavailable
- Attack vector
- Unavailable
- Privileges
- Unavailable
Timeline
How it unfolded
- Aug 28, 2026CVE publishedPublication date reported by the CVE source.
- Aug 28, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=5.11
- Affected versionversion=55307fcb925846d760ed80f4a8359dd4331c52bd <1d072cc3ba4338d6b2acb85d50a3af5cf2b12a3e
- Affected versionversion=55307fcb925846d760ed80f4a8359dd4331c52bd <2477c523c6e69733d51101ae9bd2dfc0a054b13d
- Affected versionversion=55307fcb925846d760ed80f4a8359dd4331c52bd <de8e3a4004c5df9461974352e9d7ff0f8313c508
- Affected versionversion=55307fcb925846d760ed80f4a8359dd4331c52bd <f9cd6fabe0e7c7f6fc30c6c192c7ed72aba37232
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
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Weakness, pattern, technique
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Public exploit references
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Technologies
Your stack
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Your stack
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