{"id":"DEBIAN-CVE-2026-74722","details":"In the Linux kernel, the following vulnerability has been resolved:  btrfs: fix memory leak in btrfs_do_encoded_write()  Local fuzzing of 6.12.94 has found the following memory leak:  Unreferenced object 0xffff888018050a80 (size 64):   comm \"syz.0.17\", pid 10297, jiffies 4294953601   hex dump (first 32 bytes):     00 10 00 00 00 00 00 00 01 00 00 00 00 00 00 00  ................     10 0a 05 18 80 88 ff ff 10 0a 05 18 80 88 ff ff  ................   backtrace (crc a8a6fc29):     kmemleak_alloc_recursive include/linux/kmemleak.h:42 [inline]     slab_post_alloc_hook mm/slub.c:4152 [inline]     slab_alloc_node mm/slub.c:4197 [inline]     __kmalloc_cache_noprof+0x168/0x2c0 mm/slub.c:4358     kmalloc_noprof include/linux/slab.h:878 [inline]     extent_changeset_alloc fs/btrfs/extent_io.h:207 [inline]     qgroup_reserve_data+0x1c5/0x7d0 fs/btrfs/qgroup.c:4305     btrfs_qgroup_reserve_data+0x2e/0xb0 fs/btrfs/qgroup.c:4355     btrfs_do_encoded_write+0x92e/0x1040 fs/btrfs/inode.c:9746     btrfs_encoded_write fs/btrfs/file.c:1482 [inline]     btrfs_do_write_iter+0x280/0x610 fs/btrfs/file.c:1507     btrfs_ioctl_encoded_write+0x3d6/0x490 fs/btrfs/ioctl.c:4738     btrfs_ioctl+0x6f9/0xc90 fs/btrfs/ioctl.c:-1     vfs_ioctl fs/ioctl.c:51 [inline]     __do_sys_ioctl fs/ioctl.c:906 [inline]     __se_sys_ioctl+0xf9/0x170 fs/ioctl.c:892     do_syscall_x64 arch/x86/entry/common.c:47 [inline]     do_syscall_64+0xbe/0x1a0 arch/x86/entry/common.c:78     entry_SYSCALL_64_after_hwframe+0x77/0x7f  Unreferenced object 0xffff888018050a00 (size 64):   comm \"syz.0.17\", pid 10297, jiffies 4294953601   hex dump (first 32 bytes):     00 00 00 00 00 00 00 00 ff 0f 00 00 00 00 00 00  ................     90 0a 05 18 80 88 ff ff 90 0a 05 18 80 88 ff ff  ................   backtrace (crc cb5c9580):     kmemleak_alloc_recursive include/linux/kmemleak.h:42 [inline]     slab_post_alloc_hook mm/slub.c:4152 [inline]     slab_alloc_node mm/slub.c:4197 [inline]     __kmalloc_cache_noprof+0x168/0x2c0 mm/slub.c:4358     kmalloc_noprof include/linux/slab.h:878 [inline]     kzalloc_noprof include/linux/slab.h:1014 [inline]     ulist_prealloc+0x9c/0x110 fs/btrfs/ulist.c:114     extent_changeset_prealloc fs/btrfs/extent_io.h:217 [inline]     __set_extent_bit+0x16b/0x1a70 fs/btrfs/extent-io-tree.c:1086     set_record_extent_bits+0x50/0x90 fs/btrfs/extent-io-tree.c:1821     qgroup_reserve_data+0x274/0x7d0 fs/btrfs/qgroup.c:4312     btrfs_qgroup_reserve_data+0x2e/0xb0 fs/btrfs/qgroup.c:4355     btrfs_do_encoded_write+0x92e/0x1040 fs/btrfs/inode.c:9746     btrfs_encoded_write fs/btrfs/file.c:1482 [inline]     btrfs_do_write_iter+0x280/0x610 fs/btrfs/file.c:1507     btrfs_ioctl_encoded_write+0x3d6/0x490 fs/btrfs/ioctl.c:4738     btrfs_ioctl+0x6f9/0xc90 fs/btrfs/ioctl.c:-1     vfs_ioctl fs/ioctl.c:51 [inline]     __do_sys_ioctl fs/ioctl.c:906 [inline]     __se_sys_ioctl+0xf9/0x170 fs/ioctl.c:892     do_syscall_x64 arch/x86/entry/common.c:47 [inline]     do_syscall_64+0xbe/0x1a0 arch/x86/entry/common.c:78     entry_SYSCALL_64_after_hwframe+0x77/0x7f  Fix this by freeing an extent changeset before returning from btrfs_do_encoded_write().","modified":"2026-09-29T12:47:48.776088545Z","published":"2026-08-22T16:16:47.183Z","upstream":["CVE-2026-74722"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-74722"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.187-1"}]}],"versions":["6.1.106-1","6.1.106-2","6.1.106-3","6.1.112-1","6.1.115-1","6.1.119-1","6.1.123-1","6.1.124-1","6.1.128-1","6.1.129-1","6.1.133-1","6.1.135-1","6.1.137-1","6.1.139-1","6.1.140-1","6.1.147-1","6.1.148-1","6.1.153-1","6.1.158-1","6.1.159-1","6.1.162-1","6.1.164-1","6.1.170-1","6.1.170-2","6.1.170-3","6.1.172-1","6.1.174-1","6.1.176-1","6.1.177-1","6.1.180-1","6.1.27-1","6.1.37-1","6.1.38-1","6.1.38-2","6.1.38-2~bpo11+1","6.1.38-3","6.1.38-4","6.1.38-4~bpo11+1","6.1.52-1","6.1.55-1","6.1.55-1~bpo11+1","6.1.64-1","6.1.66-1","6.1.67-1","6.1.69-1","6.1.69-1~bpo11+1","6.1.76-1","6.1.76-1~bpo11+1","6.1.82-1","6.1.85-1","6.1.90-1","6.1.90-1~bpo11+1","6.1.94-1","6.1.94-1~bpo11+1","6.1.98-1","6.1.99-1"],"ecosystem_specific":{"urgency":"not 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