{"id":"CVE-2026-89865","title":"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 …","summary":"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 …","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 697a4bc69159c3396035b0506ffa55c4b2d0b1f4 < a476377a66897549dd49bee319f4df66623417b7","Linux >= 697a4bc69159c3396035b0506ffa55c4b2d0b1f4 < 09703bc7c0be3a7a155b0ff5f21f6765ba3f519c","Linux >= 697a4bc69159c3396035b0506ffa55c4b2d0b1f4 < 97c45c75f5cdec96b1a4fba8b1d55d0dd01af1e8","Linux >= 697a4bc69159c3396035b0506ffa55c4b2d0b1f4 < 84bde5ce4038d9ad811e5c994305bbfcbd7a9f79","Linux >= 697a4bc69159c3396035b0506ffa55c4b2d0b1f4 < 581590f560b74399151b3cbc88574424c2f3d2dc","Linux >= 697a4bc69159c3396035b0506ffa55c4b2d0b1f4 < b157256c28086c434afd70cc78bf9b4d8caf1276","Linux >= 697a4bc69159c3396035b0506ffa55c4b2d0b1f4 < a5501c42256235523c4dddf799f032dfbf4f4c77","Linux >= 697a4bc69159c3396035b0506ffa55c4b2d0b1f4 < b47d4a1547d9ef21b2e9d1a739fe2204d4be05dc","Linux 3.2"],"published":"2026-09-16","updated":"2026-09-16","sourceUpdated":"2026-09-16T11:16:54.610","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-89865","references":[{"url":"https://git.kernel.org/stable/c/09703bc7c0be3a7a155b0ff5f21f6765ba3f519c","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/581590f560b74399151b3cbc88574424c2f3d2dc","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/84bde5ce4038d9ad811e5c994305bbfcbd7a9f79","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/97c45c75f5cdec96b1a4fba8b1d55d0dd01af1e8","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/a476377a66897549dd49bee319f4df66623417b7","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/a5501c42256235523c4dddf799f032dfbf4f4c77","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/b157256c28086c434afd70cc78bf9b4d8caf1276","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/b47d4a1547d9ef21b2e9d1a739fe2204d4be05dc","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-16T10:53:53.989Z","epss":0.00211,"epssPercentile":0.116,"slug":"CVE-2026-89865","body":"## Overview\n\nIn 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}