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CVE-2026-112381— Apache Traffic Server: Nullptr dereference in net_write_io on a POST half-close with chunked response

Quick assessment

Affected
Apache Software Foundation Apache Traffic Server
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

当客户端通过半关闭（half-close）方式中断 POST 请求，而系统正在从可重入的“写就绪”回调中重新解析分块（chunked）的源响应时，Apache Traffic Server 可能因空指针解引用而发生崩溃。该问题是由 CVE-2021-32564 中引入的流控制回移植（backport）所引发的、依赖时序的竞态条件所致。 受影响版本包括：Apache Traffic Server 9.2.15、10.1.4 和 10.2.0。 建议用户升级至已修复此问题的版本：9.2.16、10.1.5 或 10.2

CVSS 5.9 · Medium

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 3

VendorProduct Version RangeStatus
Apache Software Foundation Apache Traffic Server 9.2.15 affected
10.1.4 affected
10.2.0 affected
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I. Basic Information for CVE-2026-112381

Vulnerability Information
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Vulnerability Title
Apache Traffic Server: Nullptr dereference in net_write_io on a POST half-close with chunked response
Source: CVE Program / CVE List V5
Vulnerability Description
Apache Traffic Server can crash with a null pointer dereference when a client POST request is torn down via half-close while a chunked origin response is being reparsed from a reentrant write-ready callback, a timing-dependent race introduced by the CVE-2021-32564 flow-control backports. This issue affects Apache Traffic Server: 9.2.15, 10.1.4, 10.2.0. Users are recommended to upgrade to version 9.2.16, 10.1.5, or 10.2.1, which fix the issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
空指针解引用
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Apache Software Foundation Apache Traffic Server 9.2.15 -

II. Public POCs for CVE-2026-112381

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III. Intelligence Information for CVE-2026-112381

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Mailing List Discussions for CVE-2026-112381 (1)

Same Patch Batch · Apache Software Foundation · 2026-10-21 · 69 CVEs total

CVE-2026-105944 10.0 CRITICAL Apache Pulsar Manager: Missing authentication and authorization and disclosure of the Puls
CVE-2026-111813 10.0 CRITICAL Apache Traffic Server: magick plugin passes client query strings unfiltered to ImageMagick
CVE-2026-111814 10.0 CRITICAL Apache Traffic Server: Default server_session_sharing.match omits MASK_CERT, allowing pool
CVE-2026-111815 10.0 CRITICAL Apache Traffic Server: TLS session ticket resumption bypasses per-SNI verify_client STRICT
CVE-2026-111812 10.0 CRITICAL Apache Traffic Server: origin_server_auth signs client-controlled AWS headers under the pr
CVE-2026-111809 9.3 CRITICAL Apache Traffic Server: HEAD requests carrying Content-Length or Transfer-Encoding enable r
CVE-2026-111816 9.3 CRITICAL Apache Traffic Server: A malformed 302 response bypasses parse-error rejection through the
CVE-2026-105869 9.2 CRITICAL Apache Pulsar: MultiRolesTokenAuthorizationProvider uses roles from unverified tokens for
CVE-2026-111811 9.0 CRITICAL Apache Traffic Server: tsmemcache plugin exposes the shared proxy cache over the network w
CVE-2025-31699 8.9 HIGH Apache Traffic Server: Origin connection still owed a request body is reused, enabling req
CVE-2025-55702 8.7 HIGH Apache Traffic Server: An unread Expect: 100-continue request body is framed as a new requ
CVE-2026-105937 8.7 HIGH Apache Pulsar: Missing authorization of the shadow topic source allows cross-tenant messag
CVE-2026-111805 8.6 HIGH Apache Traffic Server: HTTP/2 Content-Length truncation lets a client trigger backend work
CVE-2026-111808 8.6 HIGH Apache Traffic Server: HTTP/2 DATA frame padding underflow lets a client trigger backend w
CVE-2026-111804 8.2 HIGH Apache Traffic Server: wasm plugin has a use-after-free and forwards unvalidated guest met
CVE-2026-105942 7.7 HIGH Apache Pulsar: Original principal of proxied requests authorized with the proxy's authenti
CVE-2026-105945 7.7 HIGH Apache Pulsar: Improper Validation of Package Name Components Allows Cross-Tenant Package
CVE-2026-111810 7.5 HIGH Apache Traffic Server: Unthrottled per-header diagnostic logging enables a log-flood denia
CVE-2026-105934 7.2 HIGH Apache Pulsar: Missing tenant admin authorization check when truncating a partitioned topi
CVE-2026-105930 6.0 MEDIUM Apache Pulsar: Improper Authorization of Function, Source and Sink Package URLs Allows Cro

Showing top 20 of 69 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Apache Traffic Server
Same vendor: Apache Software Foundation
Same weakness: CWE-476

V. Comments for CVE-2026-112381

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