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CVE-2022-50536 (GCVE-0-2022-50536)

Vulnerability from cvelistv5 – Published: 2025-10-07 15:21 – Updated: 2026-08-05 08:59
VLAI
Title
bpf, sockmap: Fix repeated calls to sock_put() when msg has more_data
Summary
In the Linux kernel, the following vulnerability has been resolved: bpf, sockmap: Fix repeated calls to sock_put() when msg has more_data In tcp_bpf_send_verdict() redirection, the eval variable is assigned to __SK_REDIRECT after the apply_bytes data is sent, if msg has more_data, sock_put() will be called multiple times. We should reset the eval variable to __SK_NONE every time more_data starts. This causes: IPv4: Attempt to release TCP socket in state 1 00000000b4c925d7 ------------[ cut here ]------------ refcount_t: addition on 0; use-after-free. WARNING: CPU: 5 PID: 4482 at lib/refcount.c:25 refcount_warn_saturate+0x7d/0x110 Modules linked in: CPU: 5 PID: 4482 Comm: sockhash_bypass Kdump: loaded Not tainted 6.0.0 #1 Hardware name: Red Hat KVM, BIOS 1.11.0-2.el7 04/01/2014 Call Trace: <TASK> __tcp_transmit_skb+0xa1b/0xb90 ? __alloc_skb+0x8c/0x1a0 ? __kmalloc_node_track_caller+0x184/0x320 tcp_write_xmit+0x22a/0x1110 __tcp_push_pending_frames+0x32/0xf0 do_tcp_sendpages+0x62d/0x640 tcp_bpf_push+0xae/0x2c0 tcp_bpf_sendmsg_redir+0x260/0x410 ? preempt_count_add+0x70/0xa0 tcp_bpf_send_verdict+0x386/0x4b0 tcp_bpf_sendmsg+0x21b/0x3b0 sock_sendmsg+0x58/0x70 __sys_sendto+0xfa/0x170 ? xfd_validate_state+0x1d/0x80 ? switch_fpu_return+0x59/0xe0 __x64_sys_sendto+0x24/0x30 do_syscall_64+0x37/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 5f0bfe21c853917aae4bc5a70fe57ddb4054443e , < 7508b9f4daac4ec7dfe0b6fb2d688b1c1c105e10 (git)
Affected: 15dec6d8f8642a26d6a272af2d7f9877df8f02b8 , < 28e4a763cd4a2b1a78852216ef4bd7df3a05cec6 (git)
Affected: cd9733f5d75c94a32544d6ce5be47e14194cf137 , < 8786bde11a4f31b63b3036731df0b47337a7a245 (git)
Affected: cd9733f5d75c94a32544d6ce5be47e14194cf137 , < 578a7628b838a3ac8ad61deaab5a816ff032ac13 (git)
Affected: cd9733f5d75c94a32544d6ce5be47e14194cf137 , < 113236e8f49f262f318c00ebb14b15f4834e87c1 (git)
Affected: cd9733f5d75c94a32544d6ce5be47e14194cf137 , < 7a9841ca025275b5b0edfb0b618934abb6ceec15 (git)
Affected: 6f226ffe4458ea3b8c33287cb8c86f87dc198dce (git)
Affected: 5.4.157 , < 5.4.229 (semver)
Affected: 5.10.77 , < 5.10.163 (semver)
Affected: 5.14.16 , < 5.15 (semver)
guessed Create a notification for this product.
Linux Linux Affected: 5.15
Unaffected: 0 , < 5.15 (semver)
Unaffected: 5.4.229 , ≤ 5.4.* (semver)
Unaffected: 5.10.163 , ≤ 5.10.* (semver)
Unaffected: 5.15.86 , ≤ 5.15.* (semver)
Unaffected: 6.0.16 , ≤ 6.0.* (semver)
Unaffected: 6.1.2 , ≤ 6.1.* (semver)
Unaffected: 6.2 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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    "dateUpdated": "2026-08-05T08:59:05.133Z",
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4482 Comm: sockhash_bypass Kdump: loaded Not tainted 6.0.0 #1\\nHardware name: Red Hat KVM, BIOS 1.11.0-2.el7 04/01/2014\\nCall Trace:\\n \u003cTASK\u003e\\n __tcp_transmit_skb+0xa1b/0xb90\\n ? __alloc_skb+0x8c/0x1a0\\n ? __kmalloc_node_track_caller+0x184/0x320\\n tcp_write_xmit+0x22a/0x1110\\n __tcp_push_pending_frames+0x32/0xf0\\n do_tcp_sendpages+0x62d/0x640\\n tcp_bpf_push+0xae/0x2c0\\n tcp_bpf_sendmsg_redir+0x260/0x410\\n ? preempt_count_add+0x70/0xa0\\n tcp_bpf_send_verdict+0x386/0x4b0\\n tcp_bpf_sendmsg+0x21b/0x3b0\\n sock_sendmsg+0x58/0x70\\n __sys_sendto+0xfa/0x170\\n ? xfd_validate_state+0x1d/0x80\\n ? switch_fpu_return+0x59/0xe0\\n __x64_sys_sendto+0x24/0x30\\n do_syscall_64+0x37/0x90\\n 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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-13T18:54:57+00:00",
      "cve": "CVE-2022-50536",
      "id": "CVE-2022-50536",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:fixed": "286",
      "product_status:known_affected": "38",
      "product_status:known_not_affected": "118",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: bpf, sockmap: Fix repeated calls to sock_put() when msg has more_data",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-50536.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-31T01:22:39Z",
      "cve": "CVE-2022-50536",
      "id": "CVE-2022-50536",
      "initial_release_date": "2025-10-07T23:49:23Z",
      "product_status:known_affected": "61",
      "product_status:known_not_affected": "404",
      "product_status:recommended": "72",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2022-50536",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2022-50536.json",
      "version": "23"
    }
  }
}



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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.