{"id":"DEBIAN-CVE-2023-54293","details":"In the Linux kernel, the following vulnerability has been resolved:  bcache: fixup btree_cache_wait list damage  We get a kernel crash about \"list_add corruption. next-\u003eprev should be prev (ffff9c801bc01210), but was ffff9c77b688237c. (next=ffffae586d8afe68).\"  crash\u003e struct list_head 0xffff9c801bc01210 struct list_head {   next = 0xffffae586d8afe68,   prev = 0xffffae586d8afe68 } crash\u003e struct list_head 0xffff9c77b688237c struct list_head {   next = 0x0,   prev = 0x0 } crash\u003e struct list_head 0xffffae586d8afe68 struct list_head struct: invalid kernel virtual address: ffffae586d8afe68  type: \"gdb_readmem_callback\" Cannot access memory at address 0xffffae586d8afe68  [230469.019492] Call Trace: [230469.032041]  prepare_to_wait+0x8a/0xb0 [230469.044363]  ? bch_btree_keys_free+0x6c/0xc0 [escache] [230469.056533]  mca_cannibalize_lock+0x72/0x90 [escache] [230469.068788]  mca_alloc+0x2ae/0x450 [escache] [230469.080790]  bch_btree_node_get+0x136/0x2d0 [escache] [230469.092681]  bch_btree_check_thread+0x1e1/0x260 [escache] [230469.104382]  ? finish_wait+0x80/0x80 [230469.115884]  ? bch_btree_check_recurse+0x1a0/0x1a0 [escache] [230469.127259]  kthread+0x112/0x130 [230469.138448]  ? kthread_flush_work_fn+0x10/0x10 [230469.149477]  ret_from_fork+0x35/0x40  bch_btree_check_thread() and bch_dirty_init_thread() may call mca_cannibalize() to cannibalize other cached btree nodes. Only one thread can do it at a time, so the op of other threads will be added to the btree_cache_wait list.  We must call finish_wait() to remove op from btree_cache_wait before free it's memory address. Otherwise, the list will be damaged. Also should call bch_cannibalize_unlock() to release the btree_cache_alloc_lock and wake_up other waiters.","modified":"2026-09-15T08:47:35.717231872Z","published":"2025-12-30T13:16:18.383Z","upstream":["CVE-2023-54293"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2023-54293"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.52-1"}]}],"versions":["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"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-54293.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.4.4-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-54293.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.4.4-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-54293.json"}}],"schema_version":"1.9.0"}