{
  "threat_severity" : "Low",
  "public_date" : "2024-03-01T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: RDMA/rxe: Return CQE error if invalid lkey was supplied",
    "id" : "2267525",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2267525"
  },
  "cvss3" : {
    "cvss3_base_score" : "4.4",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H",
    "status" : "verified"
  },
  "cwe" : "CWE-20",
  "details" : [ "In the Linux kernel, the following vulnerability has been resolved:\nRDMA/rxe: Return CQE error if invalid lkey was supplied\nRXE is missing update of WQE status in LOCAL_WRITE failures.  This caused\nthe following kernel panic if someone sent an atomic operation with an\nexplicitly wrong lkey.\n[leonro@vm ~]$ mkt test\ntest_atomic_invalid_lkey (tests.test_atomic.AtomicTest) ...\nWARNING: CPU: 5 PID: 263 at drivers/infiniband/sw/rxe/rxe_comp.c:740 rxe_completer+0x1a6d/0x2e30 [rdma_rxe]\nModules linked in: crc32_generic rdma_rxe ip6_udp_tunnel udp_tunnel rdma_ucm rdma_cm ib_umad ib_ipoib iw_cm ib_cm mlx5_ib ib_uverbs ib_core mlx5_core ptp pps_core\nCPU: 5 PID: 263 Comm: python3 Not tainted 5.13.0-rc1+ #2936\nHardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014\nRIP: 0010:rxe_completer+0x1a6d/0x2e30 [rdma_rxe]\nCode: 03 0f 8e 65 0e 00 00 3b 93 10 06 00 00 0f 84 82 0a 00 00 4c 89 ff 4c 89 44 24 38 e8 2d 74 a9 e1 4c 8b 44 24 38 e9 1c f5 ff ff <0f> 0b e9 0c e8 ff ff b8 05 00 00 00 41 bf 05 00 00 00 e9 ab e7 ff\nRSP: 0018:ffff8880158af090 EFLAGS: 00010246\nRAX: 0000000000000000 RBX: ffff888016a78000 RCX: ffffffffa0cf1652\nRDX: 1ffff9200004b442 RSI: 0000000000000004 RDI: ffffc9000025a210\nRBP: dffffc0000000000 R08: 00000000ffffffea R09: ffff88801617740b\nR10: ffffed1002c2ee81 R11: 0000000000000007 R12: ffff88800f3b63e8\nR13: ffff888016a78008 R14: ffffc9000025a180 R15: 000000000000000c\nFS:  00007f88b622a740(0000) GS:ffff88806d540000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00007f88b5a1fa10 CR3: 000000000d848004 CR4: 0000000000370ea0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\nrxe_do_task+0x130/0x230 [rdma_rxe]\nrxe_rcv+0xb11/0x1df0 [rdma_rxe]\nrxe_loopback+0x157/0x1e0 [rdma_rxe]\nrxe_responder+0x5532/0x7620 [rdma_rxe]\nrxe_do_task+0x130/0x230 [rdma_rxe]\nrxe_rcv+0x9c8/0x1df0 [rdma_rxe]\nrxe_loopback+0x157/0x1e0 [rdma_rxe]\nrxe_requester+0x1efd/0x58c0 [rdma_rxe]\nrxe_do_task+0x130/0x230 [rdma_rxe]\nrxe_post_send+0x998/0x1860 [rdma_rxe]\nib_uverbs_post_send+0xd5f/0x1220 [ib_uverbs]\nib_uverbs_write+0x847/0xc80 [ib_uverbs]\nvfs_write+0x1c5/0x840\nksys_write+0x176/0x1d0\ndo_syscall_64+0x3f/0x80\nentry_SYSCALL_64_after_hwframe+0x44/0xae" ],
  "affected_release" : [ {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2022-05-10T00:00:00Z",
    "advisory" : "RHSA-2022:1988",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8",
    "package" : "kernel-0:4.18.0-372.9.1.el8"
  } ],
  "package_state" : [ {
    "product_name" : "Red Hat Enterprise Linux 6",
    "fix_state" : "Out of support scope",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Out of support scope",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Out of support scope",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Affected",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Not affected",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2021-47076\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-47076\nhttps://lore.kernel.org/linux-cve-announce/2024030142-CVE-2021-47076-a6b6@gregkh/T/#u" ],
  "name" : "CVE-2021-47076",
  "csaw" : false
}