CVE-2026-63995
CVE CVE-2026-63995EUVD EUVD-2026-45568Published 2026-07-19T14:56:14.000ZLast changed 2026-08-05T12:37:59.000ZCVSS 7.8
What the advisory describes
In the Linux kernel, the following vulnerability has been resolved: ethtool: cmis: validate start_cmd_payload_size from module The CMIS firmware update code reads start_cmd_payload_size from the module's FW Management Features CDB reply and uses it directly as the byte count for memcpy. The destination buffer is 112 bytes (ETHTOOL_CMIS_CDB_LPL_MAX_PL_LENGTH - 8). So a malicious module (or corrupted response) can cause a OOB write later on in cmis_fw_update_start_download(). Let's error out. If modules that expect longer LPL writes actually exist we should revisit. struct cmis_cdb_start_fw_download_pl's definition has to move, no change there.
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux patch: 7.0.12; patch: 6.12.93; c4f78134d45c9619339c96b4bea380b1d0699788 <a46340da00385be7fb16c62425ebc20006f2d5d8; patch: 7.1; 6.11; patch: 0; patch: 6.18.35; c4f78134d45c9619339c96b4bea380b1d0699788 <0696709e951be54c699664adf546d16e28974d53; c4f78134d45c9619339c96b4bea380b1d0699788 <63112b4515469d00008452d9cfe3fb3bf1aa2df3; c4f78134d45c9619339c96b4bea380b1d0699788 <12c2496a71f82f63617971ca9b730dffa05cf58b
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Linux — Linux
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