{"id":"DEBIAN-CVE-2023-53210","details":"In the Linux kernel, the following vulnerability has been resolved:  md/raid5-cache: fix null-ptr-deref for r5l_flush_stripe_to_raid()  r5l_flush_stripe_to_raid() will check if the list 'flushing_ios' is empty, and then submit 'flush_bio', however, r5l_log_flush_endio() is clearing the list first and then clear the bio, which will cause null-ptr-deref:  T1: submit flush io raid5d  handle_active_stripes   r5l_flush_stripe_to_raid    // list is empty    // add 'io_end_ios' to the list    bio_init    submit_bio    // io1  T2: io1 is done r5l_log_flush_endio  list_splice_tail_init  // clear the list \t\t\tT3: submit new flush io \t\t\t... \t\t\tr5l_flush_stripe_to_raid \t\t\t // list is empty \t\t\t // add 'io_end_ios' to the list \t\t\t bio_init  bio_uninit  // clear bio-\u003ebi_blkg \t\t\t submit_bio \t\t\t // null-ptr-deref  Fix this problem by clearing bio before clearing the list in r5l_log_flush_endio().","modified":"2026-09-15T09:03:01.698636374Z","published":"2025-09-15T15:15:47.547Z","upstream":["CVE-2023-53210"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2023-53210"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.55-1"}]}],"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","6.1.52-1","6.1.55-1~bpo11+1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-53210.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.5.3-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-53210.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.5.3-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-53210.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}