What’s Vulnerable › Vulnerabilities

CVE-2026-90267: scsi: sd: Fix special_vec mempool leak when scsi_alloc_sgtables() fails

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-17 · updated 2026-10-30

Description

In the Linux kernel, the following vulnerability has been resolved: scsi: sd: Fix special_vec mempool leak when scsi_alloc_sgtables() fails sd_set_special_bvec() allocates a special payload page for UNMAP and WRITE SAME commands. If scsi_alloc_sgtables() fails afterward in sd_setup_unmap_cmnd() or sd_setup_write_same{10,16}_cmnd(), the SCSI midlayer does not call uninit_command() because RQF_DONTPREP is not set yet, leaking the page. Call sd_uninit_command() on error, and clear RQF_SPECIAL_PAYLOAD after freeing the page.

Affected products

• Linux: 4.12 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/05bc68669549bfddfdeef2fd119855cab3e9615a
• https://git.kernel.org/stable/c/5d7d1b8b525e5eff33a01d07dfcf7bdd3b6d790d
• https://git.kernel.org/stable/c/710a2448a06a8215ba8acb4a2791954800f7db0a
• https://git.kernel.org/stable/c/744a65e113094756e6c1cfba9ff1bf4247cb68d4
• https://git.kernel.org/stable/c/bb31844d88b77138b67aa20c3600203baff40140
• https://git.kernel.org/stable/c/e90f746f4ca3896ca560e820b7b6b0a467026938

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