tls: Purge async_hold in tls_decrypt_async_wait()

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Summary

CVECVE-2026-23414
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-02 12:16:20 UTC
Updated2026-04-02 12:16:20 UTC
DescriptionIn 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. [[email protected]: added leak comment]

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected c61d4368197d65c4809d9271f3b85325a600586a 2dcf324855c34e7f934ce978aa19b645a8f3ee71 git Not specified
CNA Linux Linux affected 39dec4ea3daf77f684308576baf483b55ca7f160 6dc11e0bd0a5466bcc76d275c09e5537bd0597dd git Not specified
CNA Linux Linux affected b8a6ff84abbcbbc445463de58704686011edc8e1 9f557c7eae127b44d2e863917dc986a4b6cb1269 git Not specified
CNA Linux Linux affected b8a6ff84abbcbbc445463de58704686011edc8e1 fd8037e1f18ca5336934d0e0e7e1a4fe097e749d git Not specified
CNA Linux Linux affected b8a6ff84abbcbbc445463de58704686011edc8e1 84a8335d8300576f1b377ae24abca1d9f197807f git Not specified
CNA Linux Linux affected 9f83fd0c179e0f458e824e417f9d5ad53443f685 git Not specified
CNA Linux Linux affected 4fc109d0ab196bd943b7451276690fb6bb48c2e0 git Not specified
CNA Linux Linux affected 6.18 Not specified
CNA Linux Linux unaffected 6.18 semver Not specified
CNA Linux Linux unaffected 6.6.131 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.80 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.21 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19.11 6.19.* semver Not specified
CNA Linux Linux unaffected 7.0-rc6 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/9f557c7eae127b44d2e863917dc986a4b6cb1269 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/6dc11e0bd0a5466bcc76d275c09e5537bd0597dd 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/fd8037e1f18ca5336934d0e0e7e1a4fe097e749d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/84a8335d8300576f1b377ae24abca1d9f197807f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/2dcf324855c34e7f934ce978aa19b645a8f3ee71 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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