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CVE-2026-23414— tls: Purge async_hold in tls_decrypt_async_wait()

Quick assessment

Affected
Linux Linux
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.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于tls async_hold队列未及时清理，可能导致内存泄漏。

CVSS 7.5 · High EPSS 0.26% · P17

Possible ATT&CK Techniques 1 AI

T1562.001

Affected Version Matrix 19

VendorProduct Version RangeStatus
Linux Linux 9f83fd0c179e0f458e824e417f9d5ad53443f685< ac435be7c7613eb13a5a8ceb5182e10b50c9ce87 affected
c61d4368197d65c4809d9271f3b85325a600586a< 2dcf324855c34e7f934ce978aa19b645a8f3ee71 affected
39dec4ea3daf77f684308576baf483b55ca7f160< 6dc11e0bd0a5466bcc76d275c09e5537bd0597dd affected
b8a6ff84abbcbbc445463de58704686011edc8e1< 9f557c7eae127b44d2e863917dc986a4b6cb1269 affected
b8a6ff84abbcbbc445463de58704686011edc8e1< fd8037e1f18ca5336934d0e0e7e1a4fe097e749d affected
b8a6ff84abbcbbc445463de58704686011edc8e1< 84a8335d8300576f1b377ae24abca1d9f197807f affected
4fc109d0ab196bd943b7451276690fb6bb48c2e0 affected
6.1.158< 6.1.168 affected
… +11 more rows
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I. Basic Information for CVE-2026-23414

Vulnerability Information
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Vulnerability Title
tls: Purge async_hold in tls_decrypt_async_wait()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: tls: Purge async_hold in tls_decrypt_async_wait() The async_hold queue pins encrypted input skbs while the AEAD engine references their scatterlist data. Once tls_decrypt_async_wait() returns, every AEAD operation has completed and the engine no longer references those skbs, so they can be freed unconditionally. A subsequent patch adds batch async decryption to tls_sw_read_sock(), introducing a new call site that must drain pending AEAD operations and release held skbs. Move __skb_queue_purge(&ctx->async_hold) into tls_decrypt_async_wait() so the purge is centralized and every caller -- recvmsg's drain path, the -EBUSY fallback in tls_do_decryption(), and the new read_sock batch path -- releases held skbs on synchronization without each site managing the purge independently. This fixes a leak when tls_strp_msg_hold() fails part-way through, after having added some cloned skbs to the async_hold queue. tls_decrypt_sg() will then call tls_decrypt_async_wait() to process all pending decrypts, and drop back to synchronous mode, but tls_sw_recvmsg() only flushes the async_hold queue when one record has been processed in "fully-async" mode, which may not be the case here. [pabeni@redhat.com: added leak comment]
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于tls async_hold队列未及时清理，可能导致内存泄漏。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 9f83fd0c179e0f458e824e417f9d5ad53443f685 ~ ac435be7c7613eb13a5a8ceb5182e10b50c9ce87 -
Linux Linux 6.18 -

II. Public POCs for CVE-2026-23414

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III. Intelligence Information for CVE-2026-23414

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Patches & Fixes for CVE-2026-23414 (1)

Same Patch Batch · Linux · 2026-04-02 · 6 CVEs total

CVE-2026-23415 7.8 HIGH futex: Fix UaF between futex_key_to_node_opt() and vma_replace_policy()
CVE-2026-23413 7.8 HIGH clsact: Fix use-after-free in init/destroy rollback asymmetry
CVE-2026-23412 7.8 HIGH netfilter: bpf: defer hook memory release until rcu readers are done
CVE-2026-23417 bpf: Fix constant blinding for PROBE_MEM32 stores
CVE-2026-23416 mm/mseal: update VMA end correctly on merge

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-23414

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