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CVE-2026-89586: Linux

8.2

CVSS 3.1

Няма данни

Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

Няма потвърждение

Атакува се

Няма данни

Време до експлоатация

Атакува се по мрежата, без особени условия, без вход и без действие от потребителя.

  • Експлоатация: няма данни за експлоатация
  • Атаката може да се автоматизира

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: ata: libata-scsi: fix DSM TRIM for sector sizes larger than 2048 bytes ata_scsi_write_same_xlat() translates a SCSI WRITE SAME command with the UNMAP bit set into an ATA DATA SET MANAGEMENT TRIM command. The TRIM descriptor is built by ata_format_dsm_trim_descr() into the 2048-byte ata_scsi_rbuf staging buffer, and the number of bytes copied is compared against the logical sector size by the caller: size = ata_format_dsm_trim_descr(scmd, trmax, block, n_block); if (size != len) /* len == sdp->sector_size */ goto invalid_param_len; ata_format_dsm_trim_descr() clamps the copy length to ATA_SCSI_RBUF_SIZE (2048). On a device whose logical sector size exceeds that (e.g. a 4Kn device, where sector_size == 4096) the function can never return more than 2048, while the caller expects it to return sector_size. The comparison therefore always fails, so every TRIM is rejected with "Parameter list length error" and WARN_ON() splats on each attempt. TRIM / discard is thus completely broken on such devices. The descriptor was incorrectly sized from the logical sector size. A DSM TRIM payload is a list of 512-byte pages, each holding up to ATA_MAX_TRIM_RNUM (64) LBA Range Entries, and is independent of the logical sector size. The Block Limits VPD page already advertises a single such page as the maximum WRITE SAME length (65535 * ATA_MAX_TRIM_RNUM logical blocks), so the block layer never sends a request that needs more than one page. Emit exactly one 512-byte page, independent of the logical sector size, and transfer only that page (COUNT == 1). For a 512-byte-sector device this is unchanged; devices with larger logical sectors now work instead of failing every TRIM.

Засегнати продукти

  • Linux Linux: ef2d7392c4ece5c3cd12a6c7ca9366cd8f189aff преди 07975b8daa3b0ab3cbc02cc48ea7bc48fadcec53; ef2d7392c4ece5c3cd12a6c7ca9366cd8f189aff преди b7b5ab2df325ffbbad7ca2debaa071e024d68cb5; ef2d7392c4ece5c3cd12a6c7ca9366cd8f189aff преди 07baa310ea3224a7044b1ca84796bb37a235af1f; ef2d7392c4ece5c3cd12a6c7ca9366cd8f189aff преди 977554ed91b54075fbc0bac536316b4841ef6258; ef2d7392c4ece5c3cd12a6c7ca9366cd8f189aff преди 04e2befe25792f2e90097f284d7e86fc6bcfe928; ef2d7392c4ece5c3cd12a6c7ca9366cd8f189aff преди c2e3dccd6870659851eaa4c12ab16418b8e3040a; ef2d7392c4ece5c3cd12a6c7ca9366cd8f189aff преди 4a4268a0b0a595bd9534cf9c7fda93775a7d8a0d; ef2d7392c4ece5c3cd12a6c7ca9366cd8f189aff преди 79cce911e623c0baa0fde307ce3a434e084b881a
  • Linux Linux: 4.9; преди 4.9; 5.10.270 до 5.10.*; 5.15.221 до 5.15.*; 6.1.188 до 6.1.*; 6.6.157 до 6.6.*; 6.12.109 до 6.12.*; 6.18.50 до 6.18.*; 7.2.4 до 7.2.*; 7.3 до *

История

  • 11 септември 2026 Публикувано

Други уязвимости в Linux Linux

Първоизточници

CVE-2026-89586: Linux | freedomonline.bg