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CVE-2026-31533: Linux, грешка в паметта

9.8

CVSS 3.1

Няма данни

Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

Няма потвърждение

Атакува се

Няма данни

Време до експлоатация

Атакува се по мрежата, без особени условия, без вход и без действие от потребителя.

CVE радар: още уязвимости от този вид

  • Експлоатация: няма данни за експлоатация
  • Атаката може да се автоматизира

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: net/tls: fix use-after-free in -EBUSY error path of tls_do_encryption The -EBUSY handling in tls_do_encryption(), introduced by commit 859054147318 ("net: tls: handle backlogging of crypto requests"), has a use-after-free due to double cleanup of encrypt_pending and the scatterlist entry. When crypto_aead_encrypt() returns -EBUSY, the request is enqueued to the cryptd backlog and the async callback tls_encrypt_done() will be invoked upon completion. That callback unconditionally restores the scatterlist entry (sge->offset, sge->length) and decrements ctx->encrypt_pending. However, if tls_encrypt_async_wait() returns an error, the synchronous error path in tls_do_encryption() performs the same cleanup again, double-decrementing encrypt_pending and double-restoring the scatterlist. The double-decrement corrupts the encrypt_pending sentinel (initialized to 1), making tls_encrypt_async_wait() permanently skip the wait for pending async callbacks. A subsequent sendmsg can then free the tls_rec via bpf_exec_tx_verdict() while a cryptd callback is still pending, resulting in a use-after-free when the callback fires on the freed record. Fix this by skipping the synchronous cleanup when the -EBUSY async wait returns an error, since the callback has already handled encrypt_pending and sge restoration.

Засегнати продукти

  • Linux Linux: 3ade391adc584f17b5570fd205de3ad029090368 преди 414fc5e5a5aff776c150f1b86770e0a25a35df3a; cd1bbca03f3c1d845ce274c0d0a66de8e5929f72 преди 02f3ecadb23558bbe068e6504118f1b712d4ece0; 13eca403876bbea3716e82cdfe6f1e6febb38754 преди 0e43e0a3c94044acc74b8e0927c27972eb5a59e8; 8590541473188741055d27b955db0777569438e3 преди aa9facde6c5005205874c37db3fd25799d741baf; 8590541473188741055d27b955db0777569438e3 преди 5d70eb25b41e9b010828cd12818b06a0c3b04412; 8590541473188741055d27b955db0777569438e3 преди 2694d408b0e595024e0fc1d64ff9db0358580f74; 8590541473188741055d27b955db0777569438e3 преди a9b8b18364fffce4c451e6f6fd218fa4ab646705; ab6397f072e5097f267abf5cb08a8004e6b17694; 5.15.160 преди 5.15.203; 6.1.84 преди 6.1.169; 6.6.18 преди 6.6.135; 6.7.6 преди 6.8
  • Linux Linux: 6.8; преди 6.8; 5.15.203 до 5.15.*; 6.1.169 до 6.1.*; 6.6.135 до 6.6.*; 6.12.82 до 6.12.*; 6.18.23 до 6.18.*; 6.19.13 до 6.19.*; 7.0 до *
  • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP: V3.1.6 преди *
  • Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP: V3.1.6 преди *
  • Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP: V3.1.6 преди *

Вид слабост

История

  • 23 април 2026 Публикувано

Други уязвимости в Linux Linux

Първоизточници

CVE-2026-31533: Linux, грешка в паметта | freedomonline.bg