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"text":"CRITICAL"
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{
"text":"In the Linux kernel, the following vulnerability has been resolved:\n\nIB/isert: wait for deferred control PDU completions before releasing the connection\n\nisert_send_done() hands ISTATE_SEND_TASKMGTRSP, ISTATE_SEND_REJECT and\nISTATE_SEND_TEXTRSP completions off to isert_comp_wq and returns. The work\nitem then runs isert_completion_put() -> isert_put_cmd(), which reads\nisert_conn->conn and takes conn->cmd_lock.\n\nNothing orders that work item against teardown. isert_wait_conn() queues\nisert_release_work, which frees isert_conn, and iscsit_close_connection()\nfrees the iscsit_conn right after it returns, so the queued work can run\nagainst freed memory.\n\nCount the deferred control PDU completions per connection and let\nisert_wait_conn() wait for them before the release work is queued.\n\nISTATE_SEND_LOGOUTRSP is deliberately not counted: that branch runs\niscsit_logout_post_handler(), which ends up waiting for\nconn->conn_wait_comp, and that completion is only sent by\niscsit_close_connection() after it has called iscsit_wait_conn().\nWaiting for it here would deadlock. Its wait stays the existing\nisert_wait4logout().\n\nThe splat below is from a kernel with tracing printk()s and an msleep(200)\ninjected into isert_do_control_comp() to widen the window:\n\n BUG: KASAN: slab-use-after-free in isert_put_cmd+0x53d/0x620\n Read of size 8 at addr ffff8881054f1038 by task kworker/u17:1/182\n\n CPU: 0 UID: 0 PID: 182 Comm: kworker/u17:1 Tainted: G B 7.2.0-rc5-TWIDE-gb8babf08acc7 #1 PREEMPT(lazy)\n Tainted: [B]=BAD_PAGE\n Hardware name: QEMU Ubuntu 24.04 PC v2 (i440FX + PIIX, arch_caps fix, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\n Workqueue: isert_comp_wq isert_do_control_comp\n Call Trace:\n \n dump_stack_lvl+0x53/0x70\n print_report+0xd0/0x630\n ? __pfx__raw_spin_lock_irqsave+0x10/0x10\n ? _raw_spin_unlock_irqrestore+0x3e/0x70\n ? isert_put_cmd+0x53d/0x620\n kasan_report+0xce/0x100\n ? isert_put_cmd+0x53d/0x620\n isert_put_cmd+0x53d/0x620\n ? isert_completion_put+0x305/0x330\n ? isert_do_control_comp+0x2ef/0x310\n process_one_work+0x633/0x1030\n ? assign_work+0x11d/0x370\n worker_thread+0x45b/0xd10\n ? __pfx_worker_thread+0x10/0x10\n ? __pfx_worker_thread+0x10/0x10\n kthread+0x2c6/0x3b0\n ? recalc_sigpending+0x15c/0x1e0\n ? __pfx_kthread+0x10/0x10\n ret_from_fork+0x36e/0x5a0\n ? __pfx_ret_from_fork+0x10/0x10\n ? __switch_to+0x572/0xdd0\n ? __pfx_kthread+0x10/0x10\n ret_from_fork_asm+0x1a/0x30\n \n\n Allocated by task 48:\n kasan_save_stack+0x33/0x60\n kasan_save_track+0x14/0x30\n __kasan_kmalloc+0x8f/0xa0\n __kmalloc_cache_noprof+0x158/0x370\n isert_cma_handler+0x1e3/0x2ae0\n cma_cm_event_handler+0x3e/0x240\n cma_ib_req_handler+0x17d9/0x4490\n cm_process_work+0x41/0x330\n cm_work_handler+0x5727/0xc160\n process_one_work+0x633/0x1030\n worker_thread+0x45b/0xd10\n kthread+0x2c6/0x3b0\n ret_from_fork+0x36e/0x5a0\n ret_from_fork_asm+0x1a/0x30\n\n Freed by task 184:\n kasan_save_stack+0x33/0x60\n kasan_save_track+0x14/0x30\n kasan_save_free_info+0x3b/0x60\n __kasan_slab_free+0x43/0x70\n kfree+0x121/0x380\n iscsit_close_connection+0x7cf/0x1e60\n iscsit_take_action_for_connection_exit+0x1b6/0x360\n iscsi_target_tx_thread+0x472/0x690\n kthread+0x2c6/0x3b0\n ret_from_fork+0x36e/0x5a0\n ret_from_fork_asm+0x1a/0x30",
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"title":"Synopsis"
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"summary":"nvd cve",
"category":"external",
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"url":"https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-98357&packageName=kernel"
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{
"text":"In the Linux kernel, the following vulnerability has been resolved:\n\nIB/isert: wait for deferred control PDU completions before releasing the connection\n\nisert_send_done() hands ISTATE_SEND_TASKMGTRSP, ISTATE_SEND_REJECT and\nISTATE_SEND_TEXTRSP completions off to isert_comp_wq and returns. The work\nitem then runs isert_completion_put() -> isert_put_cmd(), which reads\nisert_conn->conn and takes conn->cmd_lock.\n\nNothing orders that work item against teardown. isert_wait_conn() queues\nisert_release_work, which frees isert_conn, and iscsit_close_connection()\nfrees the iscsit_conn right after it returns, so the queued work can run\nagainst freed memory.\n\nCount the deferred control PDU completions per connection and let\nisert_wait_conn() wait for them before the release work is queued.\n\nISTATE_SEND_LOGOUTRSP is deliberately not counted: that branch runs\niscsit_logout_post_handler(), which ends up waiting for\nconn->conn_wait_comp, and that completion is only sent by\niscsit_close_connection() after it has called iscsit_wait_conn().\nWaiting for it here would deadlock. Its wait stays the existing\nisert_wait4logout().\n\nThe splat below is from a kernel with tracing printk()s and an msleep(200)\ninjected into isert_do_control_comp() to widen the window:\n\n BUG: KASAN: slab-use-after-free in isert_put_cmd+0x53d/0x620\n Read of size 8 at addr ffff8881054f1038 by task kworker/u17:1/182\n\n CPU: 0 UID: 0 PID: 182 Comm: kworker/u17:1 Tainted: G B 7.2.0-rc5-TWIDE-gb8babf08acc7 #1 PREEMPT(lazy)\n Tainted: [B]=BAD_PAGE\n Hardware name: QEMU Ubuntu 24.04 PC v2 (i440FX + PIIX, arch_caps fix, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\n Workqueue: isert_comp_wq isert_do_control_comp\n Call Trace:\n \n dump_stack_lvl+0x53/0x70\n print_report+0xd0/0x630\n ? __pfx__raw_spin_lock_irqsave+0x10/0x10\n ? _raw_spin_unlock_irqrestore+0x3e/0x70\n ? isert_put_cmd+0x53d/0x620\n kasan_report+0xce/0x100\n ? isert_put_cmd+0x53d/0x620\n isert_put_cmd+0x53d/0x620\n ? isert_completion_put+0x305/0x330\n ? isert_do_control_comp+0x2ef/0x310\n process_one_work+0x633/0x1030\n ? assign_work+0x11d/0x370\n worker_thread+0x45b/0xd10\n ? __pfx_worker_thread+0x10/0x10\n ? __pfx_worker_thread+0x10/0x10\n kthread+0x2c6/0x3b0\n ? recalc_sigpending+0x15c/0x1e0\n ? __pfx_kthread+0x10/0x10\n ret_from_fork+0x36e/0x5a0\n ? __pfx_ret_from_fork+0x10/0x10\n ? __switch_to+0x572/0xdd0\n ? __pfx_kthread+0x10/0x10\n ret_from_fork_asm+0x1a/0x30\n \n\n Allocated by task 48:\n kasan_save_stack+0x33/0x60\n kasan_save_track+0x14/0x30\n __kasan_kmalloc+0x8f/0xa0\n __kmalloc_cache_noprof+0x158/0x370\n isert_cma_handler+0x1e3/0x2ae0\n cma_cm_event_handler+0x3e/0x240\n cma_ib_req_handler+0x17d9/0x4490\n cm_process_work+0x41/0x330\n cm_work_handler+0x5727/0xc160\n process_one_work+0x633/0x1030\n worker_thread+0x45b/0xd10\n kthread+0x2c6/0x3b0\n ret_from_fork+0x36e/0x5a0\n ret_from_fork_asm+0x1a/0x30\n\n Freed by task 184:\n kasan_save_stack+0x33/0x60\n kasan_save_track+0x14/0x30\n kasan_save_free_info+0x3b/0x60\n __kasan_slab_free+0x43/0x70\n kfree+0x121/0x380\n iscsit_close_connection+0x7cf/0x1e60\n iscsit_take_action_for_connection_exit+0x1b6/0x360\n iscsi_target_tx_thread+0x472/0x690\n kthread+0x2c6/0x3b0\n ret_from_fork+0x36e/0x5a0\n ret_from_fork_asm+0x1a/0x30",
"category":"description",
"title":"Vulnerability Description"
}
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"details":"kernel security update",
"category":"vendor_fix",
"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-4591"
}
],
"scores":[
{
"cvss_v3":{
"baseSeverity":"HIGH",
"baseScore":8.1,
"vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version":"3.1"
},
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"threats":[
{
"details":"High",
"category":"impact"
}
],
"title":"CVE-2026-98357"
}
]
}