CVE-2025-68787 (GCVE-0-2025-68787)

Vulnerability from cvelistv5 – Published: 2026-01-13 15:29 – Updated: 2026-05-11 21:53
VLAI
Title
netrom: Fix memory leak in nr_sendmsg()
Summary
In the Linux kernel, the following vulnerability has been resolved: netrom: Fix memory leak in nr_sendmsg() syzbot reported a memory leak [1]. When function sock_alloc_send_skb() return NULL in nr_output(), the original skb is not freed, which was allocated in nr_sendmsg(). Fix this by freeing it before return. [1] BUG: memory leak unreferenced object 0xffff888129f35500 (size 240): comm "syz.0.17", pid 6119, jiffies 4294944652 hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 10 52 28 81 88 ff ff ..........R(.... backtrace (crc 1456a3e4): kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline] slab_post_alloc_hook mm/slub.c:4983 [inline] slab_alloc_node mm/slub.c:5288 [inline] kmem_cache_alloc_node_noprof+0x36f/0x5e0 mm/slub.c:5340 __alloc_skb+0x203/0x240 net/core/skbuff.c:660 alloc_skb include/linux/skbuff.h:1383 [inline] alloc_skb_with_frags+0x69/0x3f0 net/core/skbuff.c:6671 sock_alloc_send_pskb+0x379/0x3e0 net/core/sock.c:2965 sock_alloc_send_skb include/net/sock.h:1859 [inline] nr_sendmsg+0x287/0x450 net/netrom/af_netrom.c:1105 sock_sendmsg_nosec net/socket.c:727 [inline] __sock_sendmsg net/socket.c:742 [inline] sock_write_iter+0x293/0x2a0 net/socket.c:1195 new_sync_write fs/read_write.c:593 [inline] vfs_write+0x45d/0x710 fs/read_write.c:686 ksys_write+0x143/0x170 fs/read_write.c:738 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xa4/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < f77e538ac4e3adb1882d5bccb7bfdc111b5963d3 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 09efbf54eeaecebe882af603c9939a4b1bb9567e (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 73839497bbde5cd4fd02bbd9c8bc2640780ae65d (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 156a0f6341dce634a825db49ca20b48b1ae9bcc1 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 8d1ccba4b171cd504ecfa47349cb9864fc9d687c (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 51f5fbc1681bdcffcc7d18bf3dfdb2b1278d3977 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 613d12dd794e078be8ff3cf6b62a6b9acf7f4619 (git)
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Linux Linux Affected: 2.6.12
Unaffected: 0 , < 2.6.12 (semver)
Unaffected: 5.10.248 , ≤ 5.10.* (semver)
Unaffected: 5.15.198 , ≤ 5.15.* (semver)
Unaffected: 6.1.160 , ≤ 6.1.* (semver)
Unaffected: 6.6.120 , ≤ 6.6.* (semver)
Unaffected: 6.12.64 , ≤ 6.12.* (semver)
Unaffected: 6.18.3 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (original_commit_for_fix)
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{
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          "product": "Linux",
          "programFiles": [
            "net/netrom/nr_out.c"
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              "version": "6.18.3",
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetrom: Fix memory leak in nr_sendmsg()\n\nsyzbot reported a memory leak [1].\n\nWhen function sock_alloc_send_skb() return NULL in nr_output(), the\noriginal skb is not freed, which was allocated in nr_sendmsg(). Fix this\nby freeing it before return.\n\n[1]\nBUG: memory leak\nunreferenced object 0xffff888129f35500 (size 240):\n  comm \"syz.0.17\", pid 6119, jiffies 4294944652\n  hex dump (first 32 bytes):\n    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n    00 00 00 00 00 00 00 00 00 10 52 28 81 88 ff ff  ..........R(....\n  backtrace (crc 1456a3e4):\n    kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]\n    slab_post_alloc_hook mm/slub.c:4983 [inline]\n    slab_alloc_node mm/slub.c:5288 [inline]\n    kmem_cache_alloc_node_noprof+0x36f/0x5e0 mm/slub.c:5340\n    __alloc_skb+0x203/0x240 net/core/skbuff.c:660\n    alloc_skb include/linux/skbuff.h:1383 [inline]\n    alloc_skb_with_frags+0x69/0x3f0 net/core/skbuff.c:6671\n    sock_alloc_send_pskb+0x379/0x3e0 net/core/sock.c:2965\n    sock_alloc_send_skb include/net/sock.h:1859 [inline]\n    nr_sendmsg+0x287/0x450 net/netrom/af_netrom.c:1105\n    sock_sendmsg_nosec net/socket.c:727 [inline]\n    __sock_sendmsg net/socket.c:742 [inline]\n    sock_write_iter+0x293/0x2a0 net/socket.c:1195\n    new_sync_write fs/read_write.c:593 [inline]\n    vfs_write+0x45d/0x710 fs/read_write.c:686\n    ksys_write+0x143/0x170 fs/read_write.c:738\n    do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n    do_syscall_64+0xa4/0xfa0 arch/x86/entry/syscall_64.c:94\n    entry_SYSCALL_64_after_hwframe+0x77/0x7f"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T21:53:21.061Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/f77e538ac4e3adb1882d5bccb7bfdc111b5963d3"
        },
        {
          "url": "https://git.kernel.org/stable/c/09efbf54eeaecebe882af603c9939a4b1bb9567e"
        },
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          "url": "https://git.kernel.org/stable/c/73839497bbde5cd4fd02bbd9c8bc2640780ae65d"
        },
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          "url": "https://git.kernel.org/stable/c/156a0f6341dce634a825db49ca20b48b1ae9bcc1"
        },
        {
          "url": "https://git.kernel.org/stable/c/8d1ccba4b171cd504ecfa47349cb9864fc9d687c"
        },
        {
          "url": "https://git.kernel.org/stable/c/51f5fbc1681bdcffcc7d18bf3dfdb2b1278d3977"
        },
        {
          "url": "https://git.kernel.org/stable/c/613d12dd794e078be8ff3cf6b62a6b9acf7f4619"
        }
      ],
      "title": "netrom: Fix memory leak in nr_sendmsg()",
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    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-68787",
    "datePublished": "2026-01-13T15:29:00.344Z",
    "dateReserved": "2025-12-24T10:30:51.036Z",
    "dateUpdated": "2026-05-11T21:53:21.061Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2025-68787",
      "date": "2026-06-03",
      "epss": "0.00068",
      "percentile": "0.21203"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-68787\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-01-13T16:15:58.497\",\"lastModified\":\"2026-01-19T13:16:13.750\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnetrom: Fix memory leak in nr_sendmsg()\\n\\nsyzbot reported a memory leak [1].\\n\\nWhen function sock_alloc_send_skb() return NULL in nr_output(), the\\noriginal skb is not freed, which was allocated in nr_sendmsg(). Fix this\\nby freeing it before return.\\n\\n[1]\\nBUG: memory leak\\nunreferenced object 0xffff888129f35500 (size 240):\\n  comm \\\"syz.0.17\\\", pid 6119, jiffies 4294944652\\n  hex dump (first 32 bytes):\\n    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\\n    00 00 00 00 00 00 00 00 00 10 52 28 81 88 ff ff  ..........R(....\\n  backtrace (crc 1456a3e4):\\n    kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]\\n    slab_post_alloc_hook mm/slub.c:4983 [inline]\\n    slab_alloc_node mm/slub.c:5288 [inline]\\n    kmem_cache_alloc_node_noprof+0x36f/0x5e0 mm/slub.c:5340\\n    __alloc_skb+0x203/0x240 net/core/skbuff.c:660\\n    alloc_skb include/linux/skbuff.h:1383 [inline]\\n    alloc_skb_with_frags+0x69/0x3f0 net/core/skbuff.c:6671\\n    sock_alloc_send_pskb+0x379/0x3e0 net/core/sock.c:2965\\n    sock_alloc_send_skb include/net/sock.h:1859 [inline]\\n    nr_sendmsg+0x287/0x450 net/netrom/af_netrom.c:1105\\n    sock_sendmsg_nosec net/socket.c:727 [inline]\\n    __sock_sendmsg net/socket.c:742 [inline]\\n    sock_write_iter+0x293/0x2a0 net/socket.c:1195\\n    new_sync_write fs/read_write.c:593 [inline]\\n    vfs_write+0x45d/0x710 fs/read_write.c:686\\n    ksys_write+0x143/0x170 fs/read_write.c:738\\n    do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\\n    do_syscall_64+0xa4/0xfa0 arch/x86/entry/syscall_64.c:94\\n    entry_SYSCALL_64_after_hwframe+0x77/0x7f\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/09efbf54eeaecebe882af603c9939a4b1bb9567e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/156a0f6341dce634a825db49ca20b48b1ae9bcc1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/51f5fbc1681bdcffcc7d18bf3dfdb2b1278d3977\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/613d12dd794e078be8ff3cf6b62a6b9acf7f4619\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/73839497bbde5cd4fd02bbd9c8bc2640780ae65d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/8d1ccba4b171cd504ecfa47349cb9864fc9d687c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f77e538ac4e3adb1882d5bccb7bfdc111b5963d3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.