{
  "cveId": "CVE-2026-52941",
  "url": "https://patchblox.com/security/cve/CVE-2026-52941",
  "summary": "CVE-2026-52941 is fixed in 16 products on 1 platform, first by DEBIAN-CVE-2026-52941, released June 25, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "net/smc: avoid NULL deref of conn-\u003Elnk in smc_msg_event tracepoint",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  net/smc: avoid NULL deref of conn-\u003Elnk in smc_msg_event tracepoint  The smc_msg_event tracepoint class, shared by smc_tx_sendmsg and smc_rx_recvmsg, unconditionally dereferences smc-\u003Econn.lnk:  \t__string(name, smc-\u003Econn.lnk-\u003Eibname)  conn-\u003Elnk is only set for SMC-R; for SMC-D it is NULL. Other code on these paths already handles this (e.g. !conn-\u003Elnk in SMC_STAT_RMB_TX_SIZE_SMALL()). With the tracepoint enabled, the first sendmsg()/recvmsg() on an SMC-D socket crashes:    Oops: general protection fault, probably for non-canonical address   KASAN: null-ptr-deref in range [...]   RIP: 0010:strlen\u002B0x1e/0xa0   Call Trace:    trace_event_raw_event_smc_msg_event (net/smc/smc_tracepoint.h:44)    smc_rx_recvmsg (net/smc/smc_rx.c:515)    smc_recvmsg (net/smc/af_smc.c:2859)    __sys_recvfrom (net/socket.c:2315)    __x64_sys_recvfrom (net/socket.c:2326)    do_syscall_64  The faulting address 0x3e0 is offsetof(struct smc_link, ibname), confirming the NULL -\u003Elnk deref. Enabling the tracepoint requires root, but the trigger itself is unprivileged: socket(AF_SMC, ...) has no capability check, and SMC-D negotiation needs no admin step on s390 or on x86 with the loopback ISM device loaded.  Log an empty device name for SMC-D instead of dereferencing NULL.",
  "published": "2026-06-24T08:16:24Z",
  "severity": "Moderate",
  "cvss": 5.5,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00119,
  "epssPercentile": 0.01768,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-52941",
  "fixes": [
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      "product": "dtb-aarch64",
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      "fixedVersion": "6.12.0-160000.37.1",
      "fix": "OPENSUSE-SU-2026:21555-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-21555-1",
      "released": "2026-08-12T01:09:28Z"
    },
    {
      "platform": "linux",
      "product": "kernel-64kb",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "6.12.0-160000.37.1",
      "fix": "OPENSUSE-SU-2026:21555-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-21555-1",
      "released": "2026-08-12T01:09:28Z"
    },
    {
      "platform": "linux",
      "product": "kernel-64kb",
      "release": "sles 15.7",
      "fixedVersion": "6.4.0-150700.53.78.1",
      "fix": "SUSE-SU-2026:3790-1",
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      "released": "2026-08-25T12:24:44Z"
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    {
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      "product": "kernel-64kb",
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      "fix": "SUSE-SU-2026:23231-1",
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      "released": "2026-08-11T21:26:34Z"
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  "noFixYet": [],
  "dataAsOf": "2026-11-08T19:12:23Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
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}