CVE-2026-89864

CVE CVE-2026-89864EUVD EUVD-2026-80464Published 2026-09-16T10:31:35.000Z

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: scsi: qla2xxx: Bound i2c->length in I2C bsg handlers struct qla_i2c_access carries a 16-bit length field alongside a fixed 64-byte buffer: struct qla_i2c_access { uint16_t device, offset, option, length; uint8_t buffer[0x40]; } __packed; qla2x00_write_i2c() and qla2x00_read_i2c() use the user-supplied i2c->length without any bounds check. i2c is overlaid on a 256-byte on-stack buffer and sfp is a 256-byte DMA-pool buffer, so a length up to 65535 overruns both: - write: memcpy(sfp, i2c->buffer, i2c->length) over-reads the stack and over-writes the sfp heap buffer, and qla2x00_write_sfp() then DMAs i2c->length bytes out of the 256-byte buffer. - read: qla2x00_read_sfp() DMAs i2c->length bytes into the 256-byte sfp, then memcpy(i2c->buffer, sfp, i2c->length) overflows the 64-byte buffer inside the on-stack array. A caller holding CAP_SYS_RAWIO can use this to corrupt the heap and the kernel stack. Reject requests whose length exceeds the buffer before any copy or DMA transfer in both handlers.

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 9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae <97ca58b0fb026799b99e3d552d5f69cf9a3113ad; 9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae <2be39946abcde5a6416fb074ef728429e246a996; patch: 7.3-rc1; patch: 7.2.5; 9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae <47049fdadc0eaa115e813735b827e1379c0d2cf8; 9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae <522d6dcdc645d8f97d6b4cdfd6d8eea307f3ff0e; patch: 6.1.188; 3.7; patch: 6.6.157; patch: 6.18.51; patch: 6.12.110; 9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae <0918ee2c0eeb4d7f45b82b3dc11e65c2d9b7ad59; 9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae <32d6df14fdab71fe1ba304fd9a0db0411ea2e043; patch: 5.10.270; patch: 0; 9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae <9a756f277eb89f769dbf380f38245c270d31fdb5; patch: 5.15.221; 9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae <8f01f886cc5e7bbc16cbf1a9928fdebbc911e973

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

Does this concern one of your customers?

This page cannot answer that — it does not know your estate. Whoever has recorded their environments gets the answer the morning after publication, together with a paragraph they can forward to the customer unedited.

Try it for 28 days

Patchlage reports hits and suspected hits. About everything else this system says nothing — neither this page nor the situation report ever claims that an estate is safe.