{"id":"DEBIAN-CVE-2026-89449","details":"In the Linux kernel, the following vulnerability has been resolved:  iommu: Fix dev_iommu memory leak when device_add fails in iommu_mock_device_add  iommu_mock_device_add() first calls iommu_fwspec_init(), which on success allocates both dev-\u003eiommu (via dev_iommu_get()) and dev-\u003eiommu-\u003efwspec. If the subsequent device_add(dev) call fails, the error path only calls iommu_fwspec_free(dev), which frees fwspec but leaves dev-\u003eiommu still allocated.  This triggers the following kmemleak report when fuzzing with Syzkaller:  BUG: memory leak unreferenced object 0xffff888011e0a200 (size 192):   comm \"syz.1.1695\", pid 24885, jiffies 4295222527   hex dump (first 32 bytes):     00 00 00 00 00 00 00 00 00 00 00 00 ad 4e ad de  .............N..     ff ff ff ff 00 00 00 00 ff ff ff ff ff ff ff ff  ................   backtrace (crc 25df5bb3):     kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]     slab_post_alloc_hook mm/slub.c:4575 [inline]     slab_alloc_node mm/slub.c:4899 [inline]     __kmalloc_cache_noprof+0x47a/0x710 mm/slub.c:5415     kmalloc_noprof include/linux/slab.h:950 [inline]     kzalloc_noprof include/linux/slab.h:1188 [inline]     dev_iommu_get+0x10c/0x1a0 drivers/iommu/iommu.c:408     iommu_fwspec_init+0x288/0x4d0 drivers/iommu/iommu.c:3087     iommu_mock_device_add+0x46/0xb0 drivers/iommu/iommu.c:385     mock_dev_create drivers/iommu/iommufd/selftest.c:1025 [inline]     iommufd_test_mock_domain drivers/iommu/iommufd/selftest.c:1066 [inline]     iommufd_test+0x2f8a/0x6190 drivers/iommu/iommufd/selftest.c:2072     iommufd_fops_ioctl+0x367/0x540 drivers/iommu/iommufd/main.c:533     vfs_ioctl fs/ioctl.c:51 [inline]     __do_sys_ioctl fs/ioctl.c:597 [inline]     __se_sys_ioctl fs/ioctl.c:583 [inline]     __x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:583     do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]     do_syscall_64+0x116/0x800 arch/x86/entry/syscall_64.c:94     entry_SYSCALL_64_after_hwframe+0x77/0x7f  Fix this by calling dev_iommu_free(dev) instead of iommu_fwspec_free(dev) in the device_add() failure path. dev_iommu_free() frees both fwspec and the outer dev_iommu struct and clears dev-\u003eiommu.","modified":"2026-09-23T04:00:18.836581450Z","published":"2026-09-11T20:19:25.473Z","upstream":["CVE-2026-89449"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-89449"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.2.6-1"}]}],"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 yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-89449.json"}}],"schema_version":"1.9.0"}