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CVE-2026-90220: Linux

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CVSS

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Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

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    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: ALSA: seq: Don't leak the extension cell pointer in the bounce payload The bounce_error_event() embeds the failed event in the bounce payload by pointing data.ext.ptr at it. When that event is a queued variable-length event, its own data.ext.ptr holds the address of its first extension cell, put there by snd_seq_event_dup(). The payload goes out verbatim through snd_seq_expand_var_event(), so the address reaches userspace. That is the same address commit 705dd6dcbc0e ("ALSA: seq: Clear variable event pointer on read") removed from the event header. The read path still clears it there, just above the call that expands the payload. Embed a sanitised copy instead, treated exactly as snd_seq_read() treats the header. A stack copy is enough because delivery is synchronous and snd_seq_event_dup() copies before returning. An unprivileged client reaches this by setting SNDRV_SEQ_FILTER_BOUNCE, queueing a variable-length event to a port that does not exist and reading the bounce back. Eight bytes on 64-bit, from its own pool.

    Засегнати продукти

    • Linux Linux: 05e2358fec8812c37516ccea63bc4b9956d864ba преди c92b2e6e418a3885758438dddcead6e954a9e095; 93d260ce43a81df579c98bee92b91316df9c1c57 преди 42c3f856d13a91a0d4c302a0c6854813621136db; dae23c545eb5a2be3b27a82fd0f611894fb8ab69 преди b1e8d40663997aacaa198f37ce6893e07aaba77a; efc86691e4d8083d9e380ea95042c2cf679f65fd преди 6e6e471eef1d5d8cb056c7d364023fe048249204; efc86691e4d8083d9e380ea95042c2cf679f65fd преди 59e1592d3c270ff4642d5d6dc55c545306eb0693; eae296065ede41a24040e6a7c909ec970f78b4eb; 0527a56cb327021cb73167cfddf0e49efa043500; 6.12.97 преди 6.12.110; 6.18.40 преди 6.18.52; 6.6.160 преди 6.7; 7.1.5 преди 7.2
    • Linux Linux: 7.2; преди 7.2; 6.12.110 до 6.12.*; 6.18.52 до 6.18.*; 7.2.6 до 7.2.*; 7.3 до *

    История

    • 17 септември 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-90220: Linux | freedomonline.bg