CVE-2026-97583

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

• https://git.kernel.org/stable/c/3afb988fd0411707bdafb9b321086fff0da28aae 416baaa9-dc9f-4396-8d5f-8c081fb06d67
• https://git.kernel.org/stable/c/7f7f5589d048821dea316cbac9b37d27eaf7530e 416baaa9-dc9f-4396-8d5f-8c081fb06d67
• https://git.kernel.org/stable/c/ba0623fc19a424f4745394c499f9f28a8d88d397 416baaa9-dc9f-4396-8d5f-8c081fb06d67
• https://git.kernel.org/stable/c/c7f77a11a1e719192c7262aad38a3919aec62c21 416baaa9-dc9f-4396-8d5f-8c081fb06d67

The full cvelistV5 record. Download as CVE-2026-97583.json.

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/afs/addr_list.c",
            "fs/afs/fs_probe.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "3afb988fd0411707bdafb9b321086fff0da28aae",
              "status": "affected",
              "version": "39ba6af83a7f9dee3e6a7916f41a48bcbda54eba",
              "versionType": "git"
            },
            {
              "lessThan": "c7f77a11a1e719192c7262aad38a3919aec62c21",
              "status": "affected",
              "version": "40e8b52fe8c8ab6920ea5f59c5469b6918cce624",
              "versionType": "git"
            },
            {
              "lessThan": "7f7f5589d048821dea316cbac9b37d27eaf7530e",
              "status": "affected",
              "version": "40e8b52fe8c8ab6920ea5f59c5469b6918cce624",
              "versionType": "git"
            },
            {
              "lessThan": "ba0623fc19a424f4745394c499f9f28a8d88d397",
              "status": "affected",
              "version": "40e8b52fe8c8ab6920ea5f59c5469b6918cce624",
              "versionType": "git"
            },
            {
              "lessThan": "6.12.111",
              "status": "affected",
              "version": "6.12.101",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/afs/addr_list.c",
            "fs/afs/fs_probe.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.15"
            },
            {
              "lessThan": "6.15",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.111",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.53",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.111",
                  "versionStartIncluding": "6.12.101",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.53",
                  "versionStartIncluding": "6.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.7",
                  "versionStartIncluding": "6.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc3",
                  "versionStartIncluding": "6.15",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nafs: Clear stale peer app data after address list changes\n\nafs_fs_probe_fileserver() fetches the current endpoint state under\nserver->fs_lock, but leaves old_alist as NULL.  Consequently,\nafs_set_peer_appdata() treats every address list replacement as initial\nsetup and only binds the new peers; it never unbinds peers removed from\nthe old list.\n\nAn address refresh can therefore proceed as follows.  CPU 0 replaces\nserver S's list and drops Pold without clearing Pold->app_data.  The\nserver destroyer then clears only S's current peers and lets S reach its\nRCU callback.  After the callback frees S, CPU 1 handles a callback\nthrough an RxRPC connection that still pins Pold, reads Pold->app_data,\nand calls afs_use_server() on the freed object.\n\nKASAN reported:\n\n  BUG: KASAN: slab-use-after-free in afs_find_server+0x3c/0xa0\n  Read of size 4 at addr ffff8881013e1af0 by task krxrpcio/7001/74\n  Call Trace:\n   afs_find_server+0x3c/0xa0\n   afs_rx_new_call+0x15c/0x390\n   rxrpc_new_incoming_call+0x97c/0x1730\n   rxrpc_input_packet.constprop.0+0xd03/0xec0\n   rxrpc_io_thread+0x967/0x1640\n  Allocated by task 93:\n   afs_lookup_server+0x1a7/0x14c0\n   afs_alloc_server_list+0x43f/0xb60\n   afs_create_volume+0x923/0x1490\n   afs_get_tree+0x1c6/0x10a0\n  Freed by task 0:\n   kfree+0x131/0x3c0\n   rcu_core+0x50a/0x1850\n  Last potentially related work creation:\n   __call_rcu_common.constprop.0+0x71/0xa10\n   afs_put_server+0x213/0x2b0\n\nPreserve old->addresses for the peer app-data update so that removed\npeers are cleared before the endpoint state is replaced.  Also advance\nboth cursors when the old and new lists share a peer; activating the\nold/new comparison without this would otherwise loop forever on the\nshared entry."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:N - A remote cell operator supplies the changed fileserver address list in the VL address-lookup reply (afs_vl_lookup_addrs -> afs_fs_probe_fileserver). A later incoming RxRPC call over UDP from a dropped peer reaches afs_rx_new_call -> afs_find_server, which dereferences the freed server through the stale peer app_data.\nAC:H - Triggering needs a specific order of events: the client refreshes the server's address list and gets a new version, then the server record goes unused and is freed by afs_server_destroyer after the GC delay, while an RxRPC connection still holds the old peer. Only then does a new incoming call hit it. The refresh and teardown timing follow the client's own activity, not the attacker's.\nPR:N - The VL reply and the incoming cache-manager call that reaches afs_rx_new_call/afs_find_server are handled before any server identity check. The attacker needs no account on the victim host.\nUI:R - The victim must have mounted, or be actively using, a volume from the attacker's AFS cell so that afs_lookup_server and afs_update_server_record run against the attacker's VL server. AFS mounts are not user-namespace mountable.\nS:U - The use-after-free happens in the kernel AFS client's afs_server object and stays within the kernel's own security authority. No VM, sandbox or IOMMU boundary is crossed.\nC:H - afs_use_server() works on a freed kmalloc'd afs_server reached through the stale peer app_data. If that slab is reclaimed, fields the attacker controls are read as server state, including pointers, which can leak kernel memory.\nI:H - afs_use_server() increments the active counter, and the call path then takes references and queues work on the freed afs_server. Writing into a reallocated object gives a memory-corruption primitive that could be used to hijack control flow.\nA:H - A slab use-after-free in the krxrpcio I/O thread (see the KASAN report in the commit) can oops or panic the kernel and bring down all AFS and RxRPC service on the host."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-25T14:41:24.604Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/3afb988fd0411707bdafb9b321086fff0da28aae"
        },
        {
          "url": "https://git.kernel.org/stable/c/c7f77a11a1e719192c7262aad38a3919aec62c21"
        },
        {
          "url": "https://git.kernel.org/stable/c/7f7f5589d048821dea316cbac9b37d27eaf7530e"
        },
        {
          "url": "https://git.kernel.org/stable/c/ba0623fc19a424f4745394c499f9f28a8d88d397"
        }
      ],
      "title": "afs: Clear stale peer app data after address list changes",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-97583",
    "datePublished": "2026-09-25T10:22:03.666Z",
    "dateReserved": "2026-09-24T16:01:01.156Z",
    "dateUpdated": "2026-09-25T14:41:24.604Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}