{"id":"CVE-2026-89865","published":"2026-09-16T11:16:54.610","lastModified":"2026-09-16T11:16:54.610","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: qla2xxx: Zero SFP DMA buffer in FRU/I2C bsg handlers\n\nThe FRU and I2C bsg handlers stage their transfer in a DMA_POOL_SIZE\n(256-byte) bounce buffer obtained from dma_pool_alloc(), which does not\nzero the allocation. They initialize only a few leading bytes before\nhanding the buffer to qla2x00_write_sfp().\n\nqla2x00_write_sfp() can override the transfer length with a user-supplied\nvalue:\n\n\tif (len == 1)\n\t\topt |= BIT_0;\n\tif (opt & BIT_0)\n\t\tlen = *sfp;\n\n*sfp is the first byte of the (user-controlled) payload, so len can grow\nup to 255. The device then DMA-reads len bytes from the 256-byte pool\nbuffer. Since only a small prefix was written\n(e.g. MAX_FRU_SIZE == 36 bytes for a FRU version, one byte for a FRU\nstatus register), the hardware reads past the initialized region and\nwrites up to ~219 bytes of stale DMA-pool heap memory to the device\nflash.\n\nAllocate the buffer with dma_pool_zalloc() in all five FRU/I2C handlers\nso any bytes beyond the initialized data are zero rather than stale heap\ncontents.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/09703bc7c0be3a7a155b0ff5f21f6765ba3f519c","tags":[]},{"url":"https://git.kernel.org/stable/c/581590f560b74399151b3cbc88574424c2f3d2dc","tags":[]},{"url":"https://git.kernel.org/stable/c/84bde5ce4038d9ad811e5c994305bbfcbd7a9f79","tags":[]},{"url":"https://git.kernel.org/stable/c/97c45c75f5cdec96b1a4fba8b1d55d0dd01af1e8","tags":[]},{"url":"https://git.kernel.org/stable/c/a476377a66897549dd49bee319f4df66623417b7","tags":[]},{"url":"https://git.kernel.org/stable/c/a5501c42256235523c4dddf799f032dfbf4f4c77","tags":[]},{"url":"https://git.kernel.org/stable/c/b157256c28086c434afd70cc78bf9b4d8caf1276","tags":[]},{"url":"https://git.kernel.org/stable/c/b47d4a1547d9ef21b2e9d1a739fe2204d4be05dc","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}