{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-99152", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.396Z", "datePublished": "2026-10-28T10:35:07.622Z", "dateUpdated": "2026-10-28T10:35:07.622Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-28T10:35:07.622Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: libiscsi: Validate the task named by a management response\n\n__iscsi_complete_pdu() fetches the task for five response types from one\nplace and checks only that the index resolved:\n\n case ISCSI_OP_LOGOUT_RSP:\n case ISCSI_OP_LOGIN_RSP:\n case ISCSI_OP_TEXT_RSP:\n case ISCSI_OP_SCSI_TMFUNC_RSP:\n case ISCSI_OP_NOOP_IN:\n task = iscsi_itt_to_task(conn, hdr->itt);\n if (!task)\n return ISCSI_ERR_BAD_ITT;\n\niscsi_itt_to_task() bounds the index against cmds_max and looks at\nnothing else, so a target can name any slot in the pool, including one\nthat has never been used. task->conn is then NULL, and both\niscsi_nop_out_rsp() and iscsi_complete_task() dereference it. One\nunsolicited NOP-In is enough; a Text Response carrying the same ITT\ncrashes in iscsi_complete_task() instead.\n\nRequire the task to be in flight and not a SCSI command, the way\niscsi_itt_to_ctask() does for the command opcodes.\n\n[ 6.298634] Oops: general protection fault, probably for non-canonical address 0xdffffc000000000c: 0000 [#1] SMP KASAN NOPTI\n[ 6.298642] KASAN: null-ptr-deref in range [0x0000000000000060-0x0000000000000067]\n[ 6.298652] CPU: 1 UID: 0 PID: 111 Comm: iscsistart Not tainted 7.2.0-rc5-ISCSI1-gf5098b6bae76 #1 PREEMPT(lazy)\n[ 6.298654] 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[ 6.298656] RIP: 0010:iscsi_nop_out_rsp.constprop.0+0x46/0x160\n[ 6.298691] Code: c1 ea 03 48 83 ec 08 80 3c 02 00 0f 85 f5 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 6b 58 48 8d 7d 60 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 c0 00 00 00 48 8b 45 60 48 39 c3 74 50 48 b8 00\n[ 6.298698] RSP: 0018:ffff88806c907be8 EFLAGS: 00010206\n[ 6.298701] RAX: dffffc0000000000 RBX: ffff888006116800 RCX: 0000000000000020\n[ 6.298702] RDX: 000000000000000c RSI: ffff88800525d578 RDI: 0000000000000060\n[ 6.298703] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000\n[ 6.298706] R10: 0000000000000020 R11: 0000000000000000 R12: 0000000000000000\n[ 6.298706] R13: 000000000000002e R14: ffff8880056eb440 R15: ffff888006116800\n[ 6.298707] FS: 00007fc02d1c2740(0000) GS:ffff8880b29bc000(0000) knlGS:0000000000000000\n[ 6.298710] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[ 6.298711] CR2: 000055fe3b56ddf8 CR3: 00000000053b9004 CR4: 0000000000770ef0\n[ 6.298712] PKRU: 55555554\n[ 6.298713] Call Trace:\n[ 6.298714] \n[ 6.298714] __iscsi_complete_pdu+0x13a8/0x22a0\n[ 6.298758] iscsi_complete_pdu+0x54/0xa0\n[ 6.298759] iscsi_tcp_hdr_recv_done+0x870/0x2c80\n[ 6.298778] iscsi_tcp_recv_skb+0x31e/0xec0\n[ 6.298800] iscsi_sw_tcp_recv+0x12f/0x390\n[ 6.298804] __tcp_read_sock+0x1ab/0x810\n[ 6.298812] iscsi_sw_tcp_data_ready+0x18b/0x510\n[ 6.298814] tcp_rcv_established+0x1f56/0x3a00\n[ 6.298842] tcp_v4_do_rcv+0x449/0x960\n[ 6.298847] tcp_v4_rcv+0x2245/0x3bc0" } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/scsi/libiscsi.c" ], "versions": [ { "version": "7996a778ff8c717cb1a7a294475c59cc8f1e9fb8", "lessThan": "55a65ef61e2775aeb18fda63bd1959fa8b41f936", "status": "affected", "versionType": "git" }, { "version": "7996a778ff8c717cb1a7a294475c59cc8f1e9fb8", "lessThan": "f721487523d45941aed4b0ac8d829b0461a7d860", "status": "affected", "versionType": "git" }, { "version": "7996a778ff8c717cb1a7a294475c59cc8f1e9fb8", "lessThan": "11bffcd9cb346732eab2914ef44fe777a3f0b585", "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/scsi/libiscsi.c" ], "versions": [ { "version": "2.6.18", "status": "affected" }, { "version": "0", "lessThan": "2.6.18", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.59", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2.13", "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": "2.6.18", "versionEndExcluding": "6.18.59" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.18", "versionEndExcluding": "7.2.13" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.18", "versionEndExcluding": "7.3" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/55a65ef61e2775aeb18fda63bd1959fa8b41f936" }, { "url": "https://git.kernel.org/stable/c/f721487523d45941aed4b0ac8d829b0461a7d860" }, { "url": "https://git.kernel.org/stable/c/11bffcd9cb346732eab2914ef44fe777a3f0b585" } ], "title": "scsi: libiscsi: Validate the task named by a management response", "x_generator": { "engine": "bippy-1.2.0" } } } }