{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2026-98357", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-98357", "idYear": 2026, "status": "PUBLISHED", "publishedAt": "2026-10-06T08:46:44.216Z", "updatedAt": "2026-10-19T09:18:07.886Z", "importedAt": "2026-10-24T01:58:41.756Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "IB/isert: wait for deferred control PDU completions before releasing the connection", "summary": "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", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "b8d26b3be8b33682cf163274ed07479a70554633", "status": "affected", "versionType": "git", "lessThan": "f5613acbe2e346d5c466ef0bd264fca936b69f82" }, { "version": "b8d26b3be8b33682cf163274ed07479a70554633", "status": "affected", "versionType": "git", "lessThan": "ccdb1523f12bc8a9646de65055d1aafed9e9bcc6" }, { "version": "b8d26b3be8b33682cf163274ed07479a70554633", "status": "affected", "versionType": "git", "lessThan": "0e230917670c6e6fe3243abfa11299fcbe05b1f4" }, { "version": "b8d26b3be8b33682cf163274ed07479a70554633", "status": "affected", "versionType": "git", "lessThan": "505b242d9351690d1385bbe508ab4666f60363ce" }, { "version": "b8d26b3be8b33682cf163274ed07479a70554633", "status": "affected", "versionType": "git", "lessThan": "7edb8a88d6c76237c8b4435765bee1009e26a50a" }, { "version": "b8d26b3be8b33682cf163274ed07479a70554633", "status": "affected", "versionType": "git", "lessThan": "b96b8b3e41c308f606ffd10cfef1a7b9f97414cd" }, { "version": "b8d26b3be8b33682cf163274ed07479a70554633", "status": "affected", "versionType": "git", "lessThan": "7908fbc597a694bbd99bfb59ece73bc3daded68e" }, { "version": "b8d26b3be8b33682cf163274ed07479a70554633", "status": "affected", "versionType": "git", "lessThan": "a8fe3dfce8c0d8a76dc3d8486a5bff5feebe156f" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "3.10", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "3.10" }, { "version": "5.10.271", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.222", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.189", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.158", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.12.112", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.12.*" }, { "version": "6.18.54", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.18.*" }, { "version": "7.2.8", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "7.2.*" }, { "version": "7.3", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }