CVE-2023-53366 SUSE CVE security@suse.de SUSE Security Team SUSE CVE-2023-53366 Interim 1 3 2026-03-05T03:16:42Z current 2025-10-05T00:31:55Z 2026-03-05T03:16:42Z cve-database/bin/generate-cvrf-cve.pl 2020-12-27T01:00:00Z CVE-2023-53366 In the Linux kernel, the following vulnerability has been resolved: block: be a bit more careful in checking for NULL bdev while polling Wei reports a crash with an application using polled IO: PGD 14265e067 P4D 14265e067 PUD 47ec50067 PMD 0 Oops: 0000 [#1] SMP CPU: 0 PID: 21915 Comm: iocore_0 Kdump: loaded Tainted: G S 5.12.0-0_fbk12_clang_7346_g1bb6f2e7058f #1 Hardware name: Wiwynn Delta Lake MP T8/Delta Lake-Class2, BIOS Y3DLM08 04/10/2022 RIP: 0010:bio_poll+0x25/0x200 Code: 0f 1f 44 00 00 0f 1f 44 00 00 55 41 57 41 56 41 55 41 54 53 48 83 ec 28 65 48 8b 04 25 28 00 00 00 48 89 44 24 20 48 8b 47 08 <48> 8b 80 70 02 00 00 4c 8b 70 50 8b 6f 34 31 db 83 fd ff 75 25 65 RSP: 0018:ffffc90005fafdf8 EFLAGS: 00010292 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 74b43cd65dd66600 RDX: 0000000000000003 RSI: ffffc90005fafe78 RDI: ffff8884b614e140 RBP: ffff88849964df78 R08: 0000000000000000 R09: 0000000000000008 R10: 0000000000000000 R11: 0000000000000000 R12: ffff88849964df00 R13: ffffc90005fafe78 R14: ffff888137d3c378 R15: 0000000000000001 FS: 00007fd195000640(0000) GS:ffff88903f400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000270 CR3: 0000000466121001 CR4: 00000000007706f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 PKRU: 55555554 Call Trace: iocb_bio_iopoll+0x1d/0x30 io_do_iopoll+0xac/0x250 __se_sys_io_uring_enter+0x3c5/0x5a0 ? __x64_sys_write+0x89/0xd0 do_syscall_64+0x2d/0x40 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x94f225d Code: 24 cc 00 00 00 41 8b 84 24 d0 00 00 00 c1 e0 04 83 e0 10 41 09 c2 8b 33 8b 53 04 4c 8b 43 18 4c 63 4b 0c b8 aa 01 00 00 0f 05 <85> c0 0f 88 85 00 00 00 29 03 45 84 f6 0f 84 88 00 00 00 41 f6 c7 RSP: 002b:00007fd194ffcd88 EFLAGS: 00000202 ORIG_RAX: 00000000000001aa RAX: ffffffffffffffda RBX: 00007fd194ffcdc0 RCX: 00000000094f225d RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000007 RBP: 00007fd194ffcdb0 R08: 0000000000000000 R09: 0000000000000008 R10: 0000000000000001 R11: 0000000000000202 R12: 00007fd269d68030 R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000 which is due to bio->bi_bdev being NULL. This can happen if we have two tasks doing polled IO, and task B ends up completing IO from task A if they are sharing a poll queue. If task B completes the IO and puts the bio into our cache, then it can allocate that bio again before task A is done polling for it. As that would necessitate a preempt between the two tasks, it's enough to just be a bit more careful in checking for whether or not bio->bi_bdev is NULL. The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0). https://www.suse.com/support/security/rating/ SUSE Security Ratings SLES-LTSS-TERADATA 15 SP2 SUSE Liberty Linux 9 SUSE Linux Enterprise Module for Basesystem 15 SP6 SUSE Linux Enterprise Module for Development Tools 15 SP6 SUSE Linux Enterprise Workstation Extension 15 SP6 SUSE Linux Enterprise Module for Basesystem 15 SP7 SUSE Linux Enterprise Module for Development Tools 15 SP7 SUSE Linux Enterprise Workstation Extension 15 SP7 SUSE Linux Enterprise High Availability Extension 15 SP7 SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS SUSE Linux Enterprise Module for Basesystem 15 SP6 SUSE Linux Enterprise Module for Development Tools 15 SP6 SUSE Linux Enterprise Module for Legacy 15 SP6 SUSE Linux Enterprise Module for Public Cloud 15 SP6 SUSE Linux Enterprise Module for Basesystem 15 SP7 SUSE Linux Enterprise Module for Development Tools 15 SP7 SUSE Linux Enterprise Module for Legacy 15 SP7 SUSE Linux Enterprise Module for Public Cloud 15 SP7 SUSE Linux Enterprise Live Patching 12 SP5 SUSE Linux Enterprise Live Patching 15 SP3 SUSE Linux Enterprise Live Patching 15 SP4 SUSE Linux Enterprise Live Patching 15 SP5 SUSE Linux Enterprise Live Patching 15 SP6 SUSE Linux Enterprise Live Patching 15 SP7 SUSE Linux Enterprise Micro 5.0 SUSE Linux Enterprise Micro 5.1 SUSE Linux Enterprise Micro 5.2 SUSE Linux Enterprise Micro 5.3 SUSE Linux Enterprise Micro 5.4 SUSE Linux Enterprise Micro 5.5 SUSE Real Time Module 15 SP6 SUSE Real Time Module 15 SP7 SUSE Linux Enterprise Server 11 SP4 LTSS SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE SUSE Linux Enterprise Server 12 SP2-LTSS SUSE Linux Enterprise Server 12 SP4-LTSS SUSE Linux Enterprise Server 12 SP5-LTSS SUSE Linux Enterprise Server 12 SP5-LTSS Extended Security SUSE Linux Enterprise Server 15 SP1-LTSS SUSE Linux Enterprise Server 15 SP2-LTSS SUSE Linux Enterprise Server 15 SP3-LTSS SUSE Linux Enterprise Server 15 SP4-LTSS SUSE Linux Enterprise Server 15 SP5-LTSS SUSE Linux Enterprise Module for Basesystem 15 SP6 SUSE Linux Enterprise Module for Development Tools 15 SP6 SUSE Linux Enterprise Module for Legacy 15 SP6 SUSE Linux Enterprise Module for Public Cloud 15 SP6 SUSE Linux Enterprise Workstation Extension 15 SP6 SUSE Linux Enterprise Module for Basesystem 15 SP7 SUSE Linux Enterprise Module for Development Tools 15 SP7 SUSE Linux Enterprise Module for Legacy 15 SP7 SUSE Linux Enterprise Module for Public Cloud 15 SP7 SUSE Linux Enterprise Workstation Extension 15 SP7 SUSE Linux Enterprise Server 15-LTSS SUSE Linux Enterprise Server 16.0 SUSE Linux Enterprise Server Teradata 12 SP3 SUSE Linux Enterprise Server Teradata 15 SP4 SUSE Linux Enterprise Server for SAP Applications 15 SP3 SUSE 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kernel-default-devel as a component of SUSE Linux Enterprise Server for SAP Applications 15 SP4 reiserfs-kmp-default as a component of SUSE Linux Enterprise Server for SAP Applications 15 SP4 kernel-devel as a component of SUSE Linux Enterprise Server for SAP Applications 15 SP4 kernel-macros as a component of SUSE Linux Enterprise Server for SAP Applications 15 SP4 kernel-source as a component of SUSE Linux Enterprise Server for SAP Applications 15 SP4 cluster-md-kmp-default as a component of SUSE Linux Enterprise Server for SAP Applications 15 SP5 dlm-kmp-default as a component of SUSE Linux Enterprise Server for SAP Applications 15 SP5 gfs2-kmp-default as a component of SUSE Linux Enterprise Server for SAP Applications 15 SP5 kernel-default as a component of SUSE Linux Enterprise Server for SAP Applications 15 SP5 kernel-default-devel as a component of SUSE Linux Enterprise Server for SAP Applications 15 SP5 ocfs2-kmp-default as a component of SUSE Linux Enterprise Server for SAP Applications 15 SP5 reiserfs-kmp-default as a component of SUSE Linux Enterprise Server for SAP Applications 15 SP5 kernel-devel as a component of SUSE Linux Enterprise Server for SAP Applications 15 SP5 kernel-macros as a component of SUSE Linux Enterprise Server for SAP Applications 15 SP5 kernel-source as a component of SUSE Linux Enterprise Server for SAP Applications 15 SP5 kernel-default-extra as a component of SUSE Linux Enterprise Workstation Extension 15 SP6 kernel-default as a component of SUSE Linux Enterprise Workstation Extension 15 SP6 kernel-source as a component of SUSE Linux Enterprise Workstation Extension 15 SP6 kernel-default-extra as a component of SUSE Linux Enterprise Workstation Extension 15 SP7 kernel-default as a component of SUSE Linux Enterprise Workstation Extension 15 SP7 kernel-source as a component of SUSE Linux Enterprise Workstation Extension 15 SP7 kernel-default as a component of SUSE Linux Micro 6.0 kernel-devel as a component of SUSE Linux Micro 6.0 kernel-macros as a component of SUSE Linux Micro 6.0 kernel-source as a component of SUSE Linux Micro 6.0 kernel-devel-rt as a component of SUSE Linux Micro 6.0 kernel-source-rt as a component of SUSE Linux Micro 6.0 kernel-default as a component of SUSE Linux Micro 6.1 kernel-devel as a component of SUSE Linux Micro 6.1 kernel-macros as a component of SUSE Linux Micro 6.1 kernel-source as a component of SUSE Linux Micro 6.1 kernel-devel-rt as a component of SUSE Linux Micro 6.1 kernel-source-rt as a component of SUSE Linux Micro 6.1 kernel-default as a component of SUSE Manager Proxy LTS 4.3 kernel-default-devel as a component of SUSE Manager Proxy LTS 4.3 kernel-devel as a component of SUSE Manager Proxy LTS 4.3 kernel-macros as a component of SUSE Manager Proxy LTS 4.3 kernel-source as a component of SUSE Manager Proxy LTS 4.3 kernel-default as a component of SUSE Manager Retail Branch Server LTS 4.3 kernel-default-devel as a component of SUSE Manager Retail Branch Server LTS 4.3 kernel-devel as a component of SUSE Manager Retail Branch Server LTS 4.3 kernel-macros as a component of SUSE Manager Retail Branch Server LTS 4.3 kernel-source as a component of SUSE Manager Retail Branch Server LTS 4.3 kernel-default as a component of SUSE Manager Server LTS 4.3 kernel-default-devel as a component of SUSE Manager Server LTS 4.3 kernel-devel as a component of SUSE Manager Server LTS 4.3 kernel-macros as a component of SUSE Manager Server LTS 4.3 kernel-source as a component of SUSE Manager Server LTS 4.3 kernel-devel-rt as a component of SUSE Real Time Module 15 SP6 kernel-source-rt as a component of SUSE Real Time Module 15 SP6 kernel-devel-rt as a component of SUSE Real Time Module 15 SP7 kernel-source-rt as a component of SUSE Real Time Module 15 SP7 cluster-md-kmp-default as a component of openSUSE Leap 15.6 dlm-kmp-default as a component of openSUSE Leap 15.6 gfs2-kmp-default as a component of openSUSE Leap 15.6 kernel-default as a component of openSUSE Leap 15.6 kernel-default-devel as a component of openSUSE Leap 15.6 kernel-default-extra as a component of openSUSE Leap 15.6 kernel-default-livepatch as a component of openSUSE Leap 15.6 kernel-default-livepatch-devel as a component of openSUSE Leap 15.6 kernel-default-optional as a component of openSUSE Leap 15.6 kernel-default-vdso as a component of openSUSE Leap 15.6 kselftests-kmp-default as a component of openSUSE Leap 15.6 ocfs2-kmp-default as a component of openSUSE Leap 15.6 reiserfs-kmp-default as a component of openSUSE Leap 15.6 kernel-devel as a component of openSUSE Leap 15.6 kernel-macros as a component of openSUSE Leap 15.6 kernel-source as a component of openSUSE Leap 15.6 kernel-source-vanilla as a component of openSUSE Leap 15.6 kernel-devel-azure as a component of openSUSE Leap 15.6 kernel-source-azure as a component of openSUSE Leap 15.6 kernel-devel-rt as a component of openSUSE Leap 15.6 kernel-source-rt as a component of openSUSE Leap 15.6 In the Linux kernel, the following vulnerability has been resolved: block: be a bit more careful in checking for NULL bdev while polling Wei reports a crash with an application using polled IO: PGD 14265e067 P4D 14265e067 PUD 47ec50067 PMD 0 Oops: 0000 [#1] SMP CPU: 0 PID: 21915 Comm: iocore_0 Kdump: loaded Tainted: G S 5.12.0-0_fbk12_clang_7346_g1bb6f2e7058f #1 Hardware name: Wiwynn Delta Lake MP T8/Delta Lake-Class2, BIOS Y3DLM08 04/10/2022 RIP: 0010:bio_poll+0x25/0x200 Code: 0f 1f 44 00 00 0f 1f 44 00 00 55 41 57 41 56 41 55 41 54 53 48 83 ec 28 65 48 8b 04 25 28 00 00 00 48 89 44 24 20 48 8b 47 08 <48> 8b 80 70 02 00 00 4c 8b 70 50 8b 6f 34 31 db 83 fd ff 75 25 65 RSP: 0018:ffffc90005fafdf8 EFLAGS: 00010292 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 74b43cd65dd66600 RDX: 0000000000000003 RSI: ffffc90005fafe78 RDI: ffff8884b614e140 RBP: ffff88849964df78 R08: 0000000000000000 R09: 0000000000000008 R10: 0000000000000000 R11: 0000000000000000 R12: ffff88849964df00 R13: ffffc90005fafe78 R14: ffff888137d3c378 R15: 0000000000000001 FS: 00007fd195000640(0000) GS:ffff88903f400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000270 CR3: 0000000466121001 CR4: 00000000007706f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 PKRU: 55555554 Call Trace: iocb_bio_iopoll+0x1d/0x30 io_do_iopoll+0xac/0x250 __se_sys_io_uring_enter+0x3c5/0x5a0 ? __x64_sys_write+0x89/0xd0 do_syscall_64+0x2d/0x40 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x94f225d Code: 24 cc 00 00 00 41 8b 84 24 d0 00 00 00 c1 e0 04 83 e0 10 41 09 c2 8b 33 8b 53 04 4c 8b 43 18 4c 63 4b 0c b8 aa 01 00 00 0f 05 <85> c0 0f 88 85 00 00 00 29 03 45 84 f6 0f 84 88 00 00 00 41 f6 c7 RSP: 002b:00007fd194ffcd88 EFLAGS: 00000202 ORIG_RAX: 00000000000001aa RAX: ffffffffffffffda RBX: 00007fd194ffcdc0 RCX: 00000000094f225d RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000007 RBP: 00007fd194ffcdb0 R08: 0000000000000000 R09: 0000000000000008 R10: 0000000000000001 R11: 0000000000000202 R12: 00007fd269d68030 R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000 which is due to bio->bi_bdev being NULL. This can happen if we have two tasks doing polled IO, and task B ends up completing IO from task A if they are sharing a poll queue. If task B completes the IO and puts the bio into our cache, then it can allocate that bio again before task A is done polling for it. As that would necessitate a preempt between the two tasks, it's enough to just be a bit more careful in checking for whether or not bio->bi_bdev is NULL. CVE-2023-53366 SUSE Liberty Linux 9:bpftool-7.2.0-362.8.1.el9_3 SUSE Liberty Linux 9:kernel-5.14.0-362.8.1.el9_3 SUSE Liberty Linux 9:kernel-abi-stablelists-5.14.0-362.8.1.el9_3 SUSE Liberty Linux 9:kernel-core-5.14.0-362.8.1.el9_3 SUSE Liberty Linux 9:kernel-cross-headers-5.14.0-362.8.1.el9_3 SUSE Liberty Linux 9:kernel-debug-5.14.0-362.8.1.el9_3 SUSE Liberty Linux 9:kernel-debug-core-5.14.0-362.8.1.el9_3 SUSE Liberty Linux 9:kernel-debug-devel-5.14.0-362.8.1.el9_3 SUSE Liberty Linux 9:kernel-debug-devel-matched-5.14.0-362.8.1.el9_3 SUSE Liberty Linux 9:kernel-debug-modules-5.14.0-362.8.1.el9_3 SUSE Liberty Linux 9:kernel-debug-modules-core-5.14.0-362.8.1.el9_3 SUSE Liberty Linux 9:kernel-debug-modules-extra-5.14.0-362.8.1.el9_3 SUSE Liberty Linux 9:kernel-debug-uki-virt-5.14.0-362.8.1.el9_3 SUSE Liberty Linux 9:kernel-devel-5.14.0-362.8.1.el9_3 SUSE Liberty Linux 9:kernel-devel-matched-5.14.0-362.8.1.el9_3 SUSE Liberty Linux 9:kernel-doc-5.14.0-362.8.1.el9_3 SUSE Liberty Linux 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15.6:kernel-source-vanilla openSUSE Leap 15.6:kselftests-kmp-default openSUSE Leap 15.6:ocfs2-kmp-default openSUSE Leap 15.6:reiserfs-kmp-default moderate 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H