VULN/vuln-cve
1
0 Fork 0
Code Pull Requests Actions Activity
Files
c1444140e59c61ba154436ea0cd6284d8a97c3f0
vuln-cve/data/2026/98xxx/CVE-2026-98357.json
T

266 lines
17 KiB
JSON
Raw Blame History

{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-98357",
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"state": "PUBLISHED",
"assignerShortName": "Linux",
"dateReserved": "2026-09-25T10:25:14.344Z",
"datePublished": "2026-10-06T08:46:44.216Z",
"dateUpdated": "2026-10-19T09:18:07.886Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux",
"dateUpdated": "2026-10-19T09:18:07.886Z"
},
"descriptions": [
{
"lang": "en",
"value": "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 <TASK>\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 </TASK>\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"
}
],
"metrics": [
{
"cvssV3_1": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"baseScore": 8.1,
"baseSeverity": "HIGH"
},
"scenarios": [
{
"lang": "en",
"value": "AV:N - The iSER initiator triggers it remotely over RDMA (iWARP/RoCEv2 are IP-routable). Its iSCSI Text Request (or a TMF or a malformed PDU that draws a Reject) makes isert_send_done() queue isert_do_control_comp(); an RDMA CM disconnect from the same initiator then starts teardown via iscsit_close_connection().\nAC:H - The attacker sends both the request and the disconnect, but the free only wins if the already-queued isert_comp_wq work stays delayed through ib_drain_qp, isert_wait4cmds and the release work. The attacker can't control that scheduling; the reporter needed an injected msleep(200) to reproduce it.\nPR:N - The attacker only needs a full-feature iSCSI session, and LIO allows login with AuthMethod=None, where the initiator IQN is merely asserted. No credentials are checked before the Text/TMF/Reject paths that queue the deferred completion.\nUI:N - The initiator triggers the response PDU and the connection teardown entirely through its own iSCSI PDUs and RDMA CM disconnect; no action by a target administrator is needed.\nS:U - The use-after-free is in the target host's own kernel memory (isert_conn and iscsit_conn), so the impact stays within the same kernel security authority.\nC:H - isert_put_cmd() dereferences the freed isert_conn->conn and reads the freed iscsit_conn and cmd structures. Reclaiming those slab objects lets attacker-shaped data steer kernel pointer reads.\nI:H - On the freed iscsit_conn, isert_put_cmd() takes spin_lock_bh(&conn->cmd_lock), runs list_del_init(&cmd->i_conn_node) and calls iscsit_release_cmd()/transport_generic_free_cmd(). These are writes and frees through freed memory, which can corrupt the heap.\nA:H - The isert_comp_wq worker hits a slab use-after-free in isert_put_cmd() (KASAN splat in the fix commit), which on production kernels can crash or oops the iSCSI target host."
}
]
}
],
"affected": [
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"drivers/infiniband/ulp/isert/ib_isert.c",
"drivers/infiniband/ulp/isert/ib_isert.h"
],
"versions": [
{
"version": "b8d26b3be8b33682cf163274ed07479a70554633",
"lessThan": "f5613acbe2e346d5c466ef0bd264fca936b69f82",
"status": "affected",
"versionType": "git"
},
{
"version": "b8d26b3be8b33682cf163274ed07479a70554633",
"lessThan": "ccdb1523f12bc8a9646de65055d1aafed9e9bcc6",
"status": "affected",
"versionType": "git"
},
{
"version": "b8d26b3be8b33682cf163274ed07479a70554633",
"lessThan": "0e230917670c6e6fe3243abfa11299fcbe05b1f4",
"status": "affected",
"versionType": "git"
},
{
"version": "b8d26b3be8b33682cf163274ed07479a70554633",
"lessThan": "505b242d9351690d1385bbe508ab4666f60363ce",
"status": "affected",
"versionType": "git"
},
{
"version": "b8d26b3be8b33682cf163274ed07479a70554633",
"lessThan": "7edb8a88d6c76237c8b4435765bee1009e26a50a",
"status": "affected",
"versionType": "git"
},
{
"version": "b8d26b3be8b33682cf163274ed07479a70554633",
"lessThan": "b96b8b3e41c308f606ffd10cfef1a7b9f97414cd",
"status": "affected",
"versionType": "git"
},
{
"version": "b8d26b3be8b33682cf163274ed07479a70554633",
"lessThan": "7908fbc597a694bbd99bfb59ece73bc3daded68e",
"status": "affected",
"versionType": "git"
},
{
"version": "b8d26b3be8b33682cf163274ed07479a70554633",
"lessThan": "a8fe3dfce8c0d8a76dc3d8486a5bff5feebe156f",
"status": "affected",
"versionType": "git"
}
]
},
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "affected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"drivers/infiniband/ulp/isert/ib_isert.c",
"drivers/infiniband/ulp/isert/ib_isert.h"
],
"versions": [
{
"version": "3.10",
"status": "affected"
},
{
"version": "0",
"lessThan": "3.10",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.10.271",
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.15.222",
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.1.189",
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.6.158",
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.12.112",
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.18.54",
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "7.2.8",
"lessThanOrEqual": "7.2.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "7.3",
"lessThanOrEqual": "*",
"status": "unaffected",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"operator": "OR",
"negate": false,
"cpeMatch": [
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "3.10",
"versionEndExcluding": "5.10.271"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "3.10",
"versionEndExcluding": "5.15.222"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "3.10",
"versionEndExcluding": "6.1.189"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "3.10",
"versionEndExcluding": "6.6.158"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "3.10",
"versionEndExcluding": "6.12.112"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "3.10",
"versionEndExcluding": "6.18.54"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "3.10",
"versionEndExcluding": "7.2.8"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "3.10",
"versionEndExcluding": "7.3"
}
]
}
]
}
],
"references": [
{
"url": "https://git.kernel.org/stable/c/f5613acbe2e346d5c466ef0bd264fca936b69f82"
},
{
"url": "https://git.kernel.org/stable/c/ccdb1523f12bc8a9646de65055d1aafed9e9bcc6"
},
{
"url": "https://git.kernel.org/stable/c/0e230917670c6e6fe3243abfa11299fcbe05b1f4"
},
{
"url": "https://git.kernel.org/stable/c/505b242d9351690d1385bbe508ab4666f60363ce"
},
{
"url": "https://git.kernel.org/stable/c/7edb8a88d6c76237c8b4435765bee1009e26a50a"
},
{
"url": "https://git.kernel.org/stable/c/b96b8b3e41c308f606ffd10cfef1a7b9f97414cd"
},
{
"url": "https://git.kernel.org/stable/c/7908fbc597a694bbd99bfb59ece73bc3daded68e"
},
{
"url": "https://git.kernel.org/stable/c/a8fe3dfce8c0d8a76dc3d8486a5bff5feebe156f"
}
],
"title": "IB/isert: wait for deferred control PDU completions before releasing the connection",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
}
}
View Git Blame Copy Permalink