CVE-2026-74470

CVE CVE-2026-74470EUVD EUVD-2026-59663Published 2026-08-15T12:27:07.000ZLast changed 2026-08-19T16:37:17.000ZCVSS 7.8

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: scsi: scsi_debug: Fix REPORT ZONES alloc_len underflow OOB write resp_report_zones() sizes the reply buffer from the CDB allocation length. The v3 fix rounds alloc_len up with ALIGN() before deriving the descriptor count: rep_max_zones = (ALIGN((u64)alloc_len, RZONES_DESC_HD) - RZONES_DESC_HD) >> ilog2(RZONES_DESC_HD); arr_len = (u64)RZONES_DESC_HD * (rep_max_zones + 1); For alloc_len in 0xFFFFFFC1..0xFFFFFFFF, ALIGN() rounds up to 0x100000000, so arr_len is 4 GB. On 32-bit, kzalloc()'s size_t is 32-bit and truncates 0x100000000 to 0; kzalloc(0) returns ZERO_SIZE_PTR, which passes the !arr check, and desc = arr + 64 is then dereferenced in the loop -> out-of-bounds write / panic. Clamp rep_max_zones to devip->nr_zones. The loop already stops at sdebug_capacity (after nr_zones zones), so a report can never hold more than nr_zones descriptors; the clamp does not change the report, it only bounds arr_len to (nr_zones + 1) * RZONES_DESC_HD, a real device property that can never reach 0x100000000.

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 5.16; 7db0e0c8190a086ef92ce5bb960836cde49540aa <5d3e1d006bbb543259f9e31824caadbfff6a5465; patch: 7.2; patch: 0; 7db0e0c8190a086ef92ce5bb960836cde49540aa <2047ed09bf13453b7d6f9431b112ec07984dd69b; patch: 7.1.8; c4d2d7c935a4ad20e8e726ca10499cefe4537103; patch: 6.1.183; ebacb44cb2042b90951140eda806bedad23ef554; 7db0e0c8190a086ef92ce5bb960836cde49540aa <49e5b25a0b74dbac595f122e5608fdce2918cc4e; 7db0e0c8190a086ef92ce5bb960836cde49540aa <93dde0bf2f39a0f9f57fd610aa3201ce5b753433; 7db0e0c8190a086ef92ce5bb960836cde49540aa <495058429ca55ab7fcc21977b63b92907ad68066; 5.15.8 <5.16; 7db0e0c8190a086ef92ce5bb960836cde49540aa <d6e6da6bc3b53231fac77ffab428da8173ee729c; 5.10.85 <5.11; patch: 6.18.44; patch: 6.6.151; patch: 6.12.103

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

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Linux — Linux

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