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

Vulnerability from cvelistv5 – Published: 2026-01-13 15:29 – Updated: 2026-09-08 08:43
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 CPE status
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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Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP Affected: V3.1.6 , < * (custom)
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Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP Affected: V3.1.6 , < * (custom)
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Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP Affected: V3.1.6 , < * (custom)
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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\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\\n\\nnetrom: Correcci\u00f3n de fuga de memoria en nr_sendmsg()\\n\\nsyzbot inform\u00f3 una fuga de memoria [1].\\n\\nCuando la funci\u00f3n sock_alloc_send_skb() devuelve NULL en nr_output(), el\\nskb original no se libera, el cual fue asignado en nr_sendmsg(). Corrija esto\\nliber\u00e1ndolo antes de regresar.\\n\\n[1]\\nERROR: fuga de memoria\\nobjeto sin referencia 0xffff888129f35500 (tama\u00f1o 240):\\n  comm \u0027syz.0.17\u0027, pid 6119, jiffies 4294944652\\n  volcado hexadecimal (primeros 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  rastreo (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\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"net/netrom/nr_out.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"f77e538ac4e3adb1882d5bccb7bfdc111b5963d3\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"09efbf54eeaecebe882af603c9939a4b1bb9567e\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"73839497bbde5cd4fd02bbd9c8bc2640780ae65d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"156a0f6341dce634a825db49ca20b48b1ae9bcc1\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"8d1ccba4b171cd504ecfa47349cb9864fc9d687c\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"51f5fbc1681bdcffcc7d18bf3dfdb2b1278d3977\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"613d12dd794e078be8ff3cf6b62a6b9acf7f4619\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"net/netrom/nr_out.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"2.6.12\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"2.6.12\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.248\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.198\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.160\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.120\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.64\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.3\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.19\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]},{\"source\":\"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e\",\"affectedData\":[{\"vendor\":\"Siemens\",\"product\":\"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.6\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.6\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.6\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.6\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SIPLUS S7-1500 CPU 1518-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.6\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]}]}],\"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\"},{\"url\":\"https://cert-portal.siemens.com/productcert/html/ssa-019113.html\",\"source\":\"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "None",
      "current_release_date": "2026-06-28T11:47:40+00:00",
      "cve": "CVE-2025-68787",
      "id": "CVE-2025-68787",
      "initial_release_date": "2025-01-01T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: netrom: Fix memory leak in nr_sendmsg()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-68787.json",
      "version": "3"
    }
  }
}



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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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.