{"id":"DEBIAN-CVE-2026-46325","details":"In the Linux kernel, the following vulnerability has been resolved:  RDMA/rxe: Fix iova-to-va conversion for MR page sizes != PAGE_SIZE  The current implementation incorrectly handles memory regions (MRs) with page sizes different from the system PAGE_SIZE. The core issue is that rxe_set_page() is called with mr-\u003epage_size step increments, but the page_list stores individual struct page pointers, each representing PAGE_SIZE of memory.  ib_sg_to_page() has ensured that when i\u003e=1 either a) SG[i-1].dma_end and SG[i].dma_addr are contiguous or b) SG[i-1].dma_end and SG[i].dma_addr are mr-\u003epage_size aligned.  This leads to incorrect iova-to-va conversion in scenarios:  1) page_size \u003c PAGE_SIZE (e.g., MR: 4K, system: 64K):    ibmr-\u003eiova = 0x181800    sg[0]: dma_addr=0x181800, len=0x800    sg[1]: dma_addr=0x173000, len=0x1000     Access iova = 0x181800 + 0x810 = 0x182010    Expected VA: 0x173010 (second SG, offset 0x10)    Before fix:      - index = (0x182010 \u003e\u003e 12) - (0x181800 \u003e\u003e 12) = 1      - page_offset = 0x182010 & 0xFFF = 0x10      - xarray[1] stores system page base 0x170000      - Resulting VA: 0x170000 + 0x10 = 0x170010 (wrong)  2) page_size \u003e PAGE_SIZE (e.g., MR: 64K, system: 4K):    ibmr-\u003eiova = 0x18f800    sg[0]: dma_addr=0x18f800, len=0x800    sg[1]: dma_addr=0x170000, len=0x1000     Access iova = 0x18f800 + 0x810 = 0x190010    Expected VA: 0x170010 (second SG, offset 0x10)    Before fix:      - index = (0x190010 \u003e\u003e 16) - (0x18f800 \u003e\u003e 16) = 1      - page_offset = 0x190010 & 0xFFFF = 0x10      - xarray[1] stores system page for dma_addr 0x170000      - Resulting VA: system page of 0x170000 + 0x10 = 0x170010 (wrong)  Yi Zhang reported a kernel panic[1] years ago related to this defect.  Solution: 1. Replace xarray with pre-allocated rxe_mr_page array for sequential    indexing (all MR page indices are contiguous) 2. Each rxe_mr_page stores both struct page* and offset within the    system page 3. Handle MR page_size != PAGE_SIZE relationships:    - page_size \u003e PAGE_SIZE: Split MR pages into multiple system pages    - page_size \u003c= PAGE_SIZE: Store offset within system page 4. Add boundary checks and compatibility validation  This ensures correct iova-to-va conversion regardless of MR page size and system PAGE_SIZE relationship, while improving performance through array-based sequential access.  Tests on 4K and 64K PAGE_SIZE hosts: - rdma-core/pytests   $ ./build/bin/run_tests.py  --dev eth0_rxe - blktest:   $ TIMEOUT=30 QUICK_RUN=1 USE_RXE=1 NVMET_TRTYPES=rdma ./check nvme srp rnbd  [1] https://lore.kernel.org/all/CAHj4cs9XRqE25jyVw9rj9YugffLn5+f=1znaBEnu1usLOciD+g@mail.gmail.com/T/","modified":"2026-09-14T17:03:41.410178682Z","published":"2026-06-09T14:16:42.177Z","upstream":["CVE-2026-46325"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-46325"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["6.12.100-1","6.12.101-1","6.12.105-1","6.12.107-1","6.12.38-1","6.12.41-1","6.12.43-1","6.12.43-1~bpo12+1","6.12.48-1","6.12.57-1","6.12.57-1~bpo12+1","6.12.63-1","6.12.63-1~bpo12+1","6.12.69-1","6.12.69-1~bpo12+1","6.12.73-1","6.12.73-1~bpo12+1","6.12.74-1","6.12.74-2","6.12.74-2~bpo12+1","6.12.85-1","6.12.85-1~bpo12+1","6.12.86-1","6.12.86-1~bpo12+1","6.12.88-1","6.12.88-1~bpo12+1","6.12.90-1","6.12.90-1~bpo12+1","6.12.90-2","6.12.90-2~bpo12+1","6.12.94-1","6.12.94-1~bpo12+1","6.12.95-1","6.12.95-1~bpo12+1","6.12.96-1","6.13.10-1~exp1","6.13.11-1~exp1","6.13.2-1~exp1","6.13.3-1~exp1","6.13.4-1~exp1","6.13.5-1~exp1","6.13.6-1~exp1","6.13.7-1~exp1","6.13.8-1~exp1","6.13.9-1~exp1","6.13~rc6-1~exp1","6.13~rc7-1~exp1","6.14.3-1~exp1","6.14.5-1~exp1","6.14.6-1~exp1","6.15-1~exp1","6.15.1-1~exp1","6.15.2-1~exp1","6.15.3-1~exp1","6.15.4-1~exp1","6.15.5-1~exp1","6.15.6-1~exp1","6.15~rc7-1~exp1","6.16-1~exp1","6.16.1-1~exp1","6.16.10-1","6.16.11-1","6.16.12-1","6.16.12-1~bpo13+1","6.16.12-2","6.16.3-1","6.16.3-1~bpo13+1","6.16.5-1","6.16.6-1","6.16.7-1","6.16.8-1","6.16.9-1","6.16~rc7-1~exp1","6.17.10-1","6.17.11-1","6.17.12-1","6.17.13-1","6.17.13-1~bpo13+1","6.17.2-1~exp1","6.17.5-1~exp1","6.17.6-1","6.17.7-1","6.17.7-2","6.17.8-1","6.17.8-1~bpo13+1","6.17.9-1","6.18.1-1~exp1","6.18.10-1","6.18.12-1","6.18.12-1~bpo13+1","6.18.13-1","6.18.14-1","6.18.15-1","6.18.15-1~bpo13+1","6.18.2-1~exp1","6.18.3-1","6.18.5-1","6.18.5-1~bpo13+1","6.18.8-1","6.18.9-1","6.18.9-1~bpo13+1","6.18~rc4-1~exp1","6.18~rc4-1~exp2","6.18~rc5-1~exp1","6.18~rc6-1~exp1","6.18~rc7-1~exp1","6.19-1~exp1","6.19.10-1","6.19.10-1~bpo13+1","6.19.11-1","6.19.11-1~bpo13+1","6.19.12-1","6.19.13-1","6.19.13-1~bpo13+1","6.19.14-1","6.19.14-1~bpo13+1","6.19.2-1~exp1","6.19.3-1~exp1","6.19.4-1~exp1","6.19.5-1~exp1","6.19.6-1","6.19.6-2","6.19.6-2~bpo13+1","6.19.8-1","6.19.8-1~bpo13+1","6.19~rc4-1~exp1","6.19~rc5-1~exp1","6.19~rc6-1~exp1","6.19~rc7-1~exp1","6.19~rc8-1~exp1","7.0-1~exp1","7.0.1-1~exp1","7.0.10-1","7.0.10-1~bpo13+1","7.0.12-1","7.0.12-2","7.0.12-2~bpo13+1","7.0.13-1","7.0.13-1~bpo13+1","7.0.14-1","7.0.3-1","7.0.4-1","7.0.4-1~bpo13+1","7.0.7-1","7.0.7-1~bpo13+1","7.0.9-1","7.0.9-1~bpo13+1","7.1.1-1~exp1","7.1.10-1","7.1.12-1","7.1.13-1","7.1.2-1~exp1","7.1.3-1","7.1.3-1+sunvdc","7.1.3-1~bpo13+1","7.1.4-1","7.1.5-1","7.1.6-1","7.1.7-1","7.1.7-1~bpo13+1","7.1.8-1","7.1.8-1~bpo13+1","7.1.8-2","7.1.9-1","7.1.9-1+sparc64","7.1~rc2-1~exp1","7.1~rc3-1~exp1","7.1~rc4-1~exp1","7.1~rc4-1~exp2","7.1~rc5-1~exp1","7.1~rc7-1~exp1","7.2.2-1~exp1","7.2.3-1~exp1","7.2~rc3-1~exp1","7.2~rc5-1~exp1","7.2~rc7-1~exp1"],"ecosystem_specific":{"urgency":"not 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