Answer in brief
CVE-2026-89515 records a Unknown severity vulnerability in scsi: core: Fill in DMA padding bytes in scsi_alloc_sgtables(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=40b01b9bbdf51ae543a04744283bf2d56c4a6afa <a4353ec7742bdf87dcdde5875270feb3a1982a51 || >=40b01b9bbdf51ae543a04744283bf2d56c4a6afa <e7143c3f4e5c0a7986733c6f27009274bf6c4264 || >=40b01b9bbdf51ae543a04744283bf2d56c4a6afa <6fd1cce5018fdcc8d928e00a6a1dd2997d5b9409 || >=40b01b9bbdf51ae543a04744283bf2d56c4a6afa <626147717bea776b61ed3631d2c26283760c4cc4 | a4353ec7742bdf87dcdde5875270feb3a1982a51, e7143c3f4e5c0a7986733c6f27009274bf6c4264, 6fd1cce5018fdcc8d928e00a6a1dd2997d5b9409, 626147717bea776b61ed3631d2c26283760c4cc4 |
| Linux/Linuxgeneric | 2.6.25 | Not reported |
| Linux/Linuxgeneric | >=40b01b9bbdf51ae543a04744283bf2d56c4a6afa <1aa6df61cef1f47f503c3ccf60d08c4dd931fdc1 || >=40b01b9bbdf51ae543a04744283bf2d56c4a6afa <6da140ebdfdd6aa3773945f2c0ebba01d2ef33d8 || >=40b01b9bbdf51ae543a04744283bf2d56c4a6afa <fd2cbe08c6ccba7fc1ddb830653a93bb7e2d833c || >=40b01b9bbdf51ae543a04744283bf2d56c4a6afa <28ed5343666ff424ce5e248fa1c5a402303b4aff || >=40b01b9bbdf51ae543a04744283bf2d56c4a6afa <a4353ec7742bdf87dcdde5875270feb3a1982a51 || >=40b01b9bbdf51ae543a04744283bf2d56c4a6afa <e7143c3f4e5c0a7986733c6f27009274bf6c4264 || >=40b01b9bbdf51ae543a04744283bf2d56c4a6afa <6fd1cce5018fdcc8d928e00a6a1dd2997d5b9409 || >=40b01b9bbdf51ae543a04744283bf2d56c4a6afa <626147717bea776b61ed3631d2c26283760c4cc4 | 1aa6df61cef1f47f503c3ccf60d08c4dd931fdc1, 6da140ebdfdd6aa3773945f2c0ebba01d2ef33d8, fd2cbe08c6ccba7fc1ddb830653a93bb7e2d833c, 28ed5343666ff424ce5e248fa1c5a402303b4aff, a4353ec7742bdf87dcdde5875270feb3a1982a51, e7143c3f4e5c0a7986733c6f27009274bf6c4264, 6fd1cce5018fdcc8d928e00a6a1dd2997d5b9409, 626147717bea776b61ed3631d2c26283760c4cc4 |
Published upstream
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 11, 2026
In the Linux kernel, the following vulnerability has been resolved: scsi: core: Fill in DMA padding bytes in scsi_alloc_sgtables() During fuzz testing, the following issue was discovered: BUG: KMSAN: uninit-value in __dma_map_sg_attrs+0x217/0x310 __dma_map_sg_attrs+0x217/0x310 dma_map_sg_attrs+0x4a/0x70 ata_qc_issue+0x9f8/0x1420 __ata_scsi_queuecmd+0x1657/0x1740 ata_scsi_queuecmd+0x79a/0x920 scsi_queue_rq+0x4472/0x4f40 blk_mq_dispatch_rq_list+0x1cca/0x3ee0 __blk_mq_sched_dispatch_requests+0x458/0x630 blk_mq_sched_dispatch_requests+0x15b/0x340 __blk_mq_run_hw_queue+0xe5/0x250 __blk_mq_delay_run_hw_queue+0x138/0x780 blk_mq_run_hw_queue+0x4bb/0x7e0 blk_mq_sched_insert_request+0x2a7/0x4c0 blk_execute_rq+0x497/0x8a0 sg_io+0xbe0/0xe20 scsi_ioctl+0x2b36/0x3c60 sr_block_ioctl+0x319/0x440 blkdev_ioctl+0x80f/0xd70 __se_sys_ioctl+0x219/0x420 __x64_sys_ioctl+0x93/0xe0 x64_sys_call+0x1d6c/0x3ad0 do_syscall_64+0x4c/0xa0 entry_SYSCALL_64_after_hwframe+0x6e/0xd8 Uninit was created at: __alloc_pages+0x5c0/0xc80 alloc_pages+0xe0e/0x1050 blk_rq_map_user_iov+0x2b77/0x6100 blk_rq_map_user_io+0x2fa/0x4d0 sg_io+0xad6/0xe20 scsi_ioctl+0x2b36/0x3c60 sr_block_ioctl+0x319/0x440 blkdev_ioctl+0x80f/0xd70 __se_sys_ioctl+0x219/0x420 __x64_sys_ioctl+0x93/0xe0 x64_sys_call+0x1d6c/0x3ad0 do_syscall_64+0x4c/0xa0 entry_SYSCALL_64_after_hwframe+0x6e/0xd8 Bytes 14-15 of 16 are uninitialized Memory access of size 16 starts at ffff88800cbdb000 When processing the last unaligned element of the scatterlist, it is supplemented with missing bytes in the amount of pad_len. These bytes remain uninitialized, which leads to a problem. Extend last_sg->length by pad_len first, then use sg_zero_buffer() to zero those pad_len bytes. sg_zero_buffer() uses sg_miter internally, which correctly handles sg entries spanning multiple pages and padding that crosses a page boundary. Found by Linux Verification Center (linuxtesting.org) with Syzkaller.
Quoted source text, attributed separately from HOL analysis.