Security update for the Linux Kernel (Live Patch 36 for SLE 15 SP4) SUSE Patch security@suse.de SUSE Security Team SUSE-SU-2025:02444-1 Final 1 1 2025-07-21T13:04:21Z current 2025-07-21T13:04:21Z 2025-07-21T13:04:21Z cve-database/bin/generate-cvrf.pl 2017-02-24T01:00:00Z Security update for the Linux Kernel (Live Patch 36 for SLE 15 SP4) This update for the Linux Kernel 5.14.21-150400_24_150 fixes several issues. The following security issues were fixed: - CVE-2022-49465: blk-throttle: Set BIO_THROTTLED when bio has been throttled (bsc#1238920). - CVE-2025-21772: partitions: mac: fix handling of bogus partition table (bsc#1238912). - CVE-2024-56558: nfsd: make sure exp active before svc_export_show (bsc#1243648). The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0). SUSE-2025-2444,SUSE-SLE-Module-Live-Patching-15-SP4-2025-2444 Copyright SUSE LLC under the Creative Commons License 4.0 with Attribution (CC-BY-4.0) https://www.suse.com/support/update/announcement/2025/suse-su-202502444-1/ Link for SUSE-SU-2025:02444-1 https://lists.suse.com/pipermail/sle-updates/2025-July/040828.html E-Mail link for SUSE-SU-2025:02444-1 https://www.suse.com/support/security/rating/ SUSE Security Ratings https://bugzilla.suse.com/1238912 SUSE Bug 1238912 https://bugzilla.suse.com/1238920 SUSE Bug 1238920 https://bugzilla.suse.com/1243648 SUSE Bug 1243648 https://www.suse.com/security/cve/CVE-2022-49465/ SUSE CVE CVE-2022-49465 page https://www.suse.com/security/cve/CVE-2024-56558/ SUSE CVE CVE-2024-56558 page https://www.suse.com/security/cve/CVE-2025-21772/ SUSE CVE CVE-2025-21772 page SUSE Linux Enterprise Live Patching 15 SP4 kernel-livepatch-5_14_21-150400_24_150-default-3-150400.2.1 kernel-livepatch-5_14_21-150400_24_150-default-3-150400.2.1 as a component of SUSE Linux Enterprise Live Patching 15 SP4 In the Linux kernel, the following vulnerability has been resolved: blk-throttle: Set BIO_THROTTLED when bio has been throttled 1.In current process, all bio will set the BIO_THROTTLED flag after __blk_throtl_bio(). 2.If bio needs to be throttled, it will start the timer and stop submit bio directly. Bio will submit in blk_throtl_dispatch_work_fn() when the timer expires.But in the current process, if bio is throttled. The BIO_THROTTLED will be set to bio after timer start. If the bio has been completed, it may cause use-after-free blow. BUG: KASAN: use-after-free in blk_throtl_bio+0x12f0/0x2c70 Read of size 2 at addr ffff88801b8902d4 by task fio/26380 dump_stack+0x9b/0xce print_address_description.constprop.6+0x3e/0x60 kasan_report.cold.9+0x22/0x3a blk_throtl_bio+0x12f0/0x2c70 submit_bio_checks+0x701/0x1550 submit_bio_noacct+0x83/0xc80 submit_bio+0xa7/0x330 mpage_readahead+0x380/0x500 read_pages+0x1c1/0xbf0 page_cache_ra_unbounded+0x471/0x6f0 do_page_cache_ra+0xda/0x110 ondemand_readahead+0x442/0xae0 page_cache_async_ra+0x210/0x300 generic_file_buffered_read+0x4d9/0x2130 generic_file_read_iter+0x315/0x490 blkdev_read_iter+0x113/0x1b0 aio_read+0x2ad/0x450 io_submit_one+0xc8e/0x1d60 __se_sys_io_submit+0x125/0x350 do_syscall_64+0x2d/0x40 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Allocated by task 26380: kasan_save_stack+0x19/0x40 __kasan_kmalloc.constprop.2+0xc1/0xd0 kmem_cache_alloc+0x146/0x440 mempool_alloc+0x125/0x2f0 bio_alloc_bioset+0x353/0x590 mpage_alloc+0x3b/0x240 do_mpage_readpage+0xddf/0x1ef0 mpage_readahead+0x264/0x500 read_pages+0x1c1/0xbf0 page_cache_ra_unbounded+0x471/0x6f0 do_page_cache_ra+0xda/0x110 ondemand_readahead+0x442/0xae0 page_cache_async_ra+0x210/0x300 generic_file_buffered_read+0x4d9/0x2130 generic_file_read_iter+0x315/0x490 blkdev_read_iter+0x113/0x1b0 aio_read+0x2ad/0x450 io_submit_one+0xc8e/0x1d60 __se_sys_io_submit+0x125/0x350 do_syscall_64+0x2d/0x40 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Freed by task 0: kasan_save_stack+0x19/0x40 kasan_set_track+0x1c/0x30 kasan_set_free_info+0x1b/0x30 __kasan_slab_free+0x111/0x160 kmem_cache_free+0x94/0x460 mempool_free+0xd6/0x320 bio_free+0xe0/0x130 bio_put+0xab/0xe0 bio_endio+0x3a6/0x5d0 blk_update_request+0x590/0x1370 scsi_end_request+0x7d/0x400 scsi_io_completion+0x1aa/0xe50 scsi_softirq_done+0x11b/0x240 blk_mq_complete_request+0xd4/0x120 scsi_mq_done+0xf0/0x200 virtscsi_vq_done+0xbc/0x150 vring_interrupt+0x179/0x390 __handle_irq_event_percpu+0xf7/0x490 handle_irq_event_percpu+0x7b/0x160 handle_irq_event+0xcc/0x170 handle_edge_irq+0x215/0xb20 common_interrupt+0x60/0x120 asm_common_interrupt+0x1e/0x40 Fix this by move BIO_THROTTLED set into the queue_lock. CVE-2022-49465 SUSE Linux Enterprise Live Patching 15 SP4:kernel-livepatch-5_14_21-150400_24_150-default-3-150400.2.1 important To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2025/suse-su-202502444-1/ https://www.suse.com/security/cve/CVE-2022-49465.html CVE-2022-49465 https://bugzilla.suse.com/1238919 SUSE Bug 1238919 https://bugzilla.suse.com/1238920 SUSE Bug 1238920 In the Linux kernel, the following vulnerability has been resolved: nfsd: make sure exp active before svc_export_show The function `e_show` was called with protection from RCU. This only ensures that `exp` will not be freed. Therefore, the reference count for `exp` can drop to zero, which will trigger a refcount use-after-free warning when `exp_get` is called. To resolve this issue, use `cache_get_rcu` to ensure that `exp` remains active. ------------[ cut here ]------------ refcount_t: addition on 0; use-after-free. WARNING: CPU: 3 PID: 819 at lib/refcount.c:25 refcount_warn_saturate+0xb1/0x120 CPU: 3 UID: 0 PID: 819 Comm: cat Not tainted 6.12.0-rc3+ #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.1-2.fc37 04/01/2014 RIP: 0010:refcount_warn_saturate+0xb1/0x120 ... Call Trace: <TASK> e_show+0x20b/0x230 [nfsd] seq_read_iter+0x589/0x770 seq_read+0x1e5/0x270 vfs_read+0x125/0x530 ksys_read+0xc1/0x160 do_syscall_64+0x5f/0x170 entry_SYSCALL_64_after_hwframe+0x76/0x7e CVE-2024-56558 SUSE Linux Enterprise Live Patching 15 SP4:kernel-livepatch-5_14_21-150400_24_150-default-3-150400.2.1 important To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2025/suse-su-202502444-1/ https://www.suse.com/security/cve/CVE-2024-56558.html CVE-2024-56558 https://bugzilla.suse.com/1235100 SUSE Bug 1235100 https://bugzilla.suse.com/1243648 SUSE Bug 1243648 In the Linux kernel, the following vulnerability has been resolved: partitions: mac: fix handling of bogus partition table Fix several issues in partition probing: - The bailout for a bad partoffset must use put_dev_sector(), since the preceding read_part_sector() succeeded. - If the partition table claims a silly sector size like 0xfff bytes (which results in partition table entries straddling sector boundaries), bail out instead of accessing out-of-bounds memory. - We must not assume that the partition table contains proper NUL termination - use strnlen() and strncmp() instead of strlen() and strcmp(). CVE-2025-21772 SUSE Linux Enterprise Live Patching 15 SP4:kernel-livepatch-5_14_21-150400_24_150-default-3-150400.2.1 important To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2025/suse-su-202502444-1/ https://www.suse.com/security/cve/CVE-2025-21772.html CVE-2025-21772 https://bugzilla.suse.com/1238911 SUSE Bug 1238911 https://bugzilla.suse.com/1238912 SUSE Bug 1238912