{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-04-20T15:59:47.611","vulnerabilities":[{"cve":{"id":"CVE-2025-38488","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","published":"2025-07-28T12:15:30.857","lastModified":"2026-01-07T16:26:11.300","vulnStatus":"Analyzed","cveTags":[],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix use-after-free in crypt_message when using async crypto\n\nThe CVE-2024-50047 fix removed asynchronous crypto handling from\ncrypt_message(), assuming all crypto operations are synchronous.\nHowever, when hardware crypto accelerators are used, this can cause\nuse-after-free crashes:\n\n  crypt_message()\n    // Allocate the creq buffer containing the req\n    creq = smb2_get_aead_req(..., &req);\n\n    // Async encryption returns -EINPROGRESS immediately\n    rc = enc ? crypto_aead_encrypt(req) : crypto_aead_decrypt(req);\n\n    // Free creq while async operation is still in progress\n    kvfree_sensitive(creq, ...);\n\nHardware crypto modules often implement async AEAD operations for\nperformance. When crypto_aead_encrypt/decrypt() returns -EINPROGRESS,\nthe operation completes asynchronously. Without crypto_wait_req(),\nthe function immediately frees the request buffer, leading to crashes\nwhen the driver later accesses the freed memory.\n\nThis results in a use-after-free condition when the hardware crypto\ndriver later accesses the freed request structure, leading to kernel\ncrashes with NULL pointer dereferences.\n\nThe issue occurs because crypto_alloc_aead() with mask=0 doesn't\nguarantee synchronous operation. Even without CRYPTO_ALG_ASYNC in\nthe mask, async implementations can be selected.\n\nFix by restoring the async crypto handling:\n- DECLARE_CRYPTO_WAIT(wait) for completion tracking\n- aead_request_set_callback() for async completion notification\n- crypto_wait_req() to wait for operation completion\n\nThis ensures the request buffer isn't freed until the crypto operation\ncompletes, whether synchronous or asynchronous, while preserving the\nCVE-2024-50047 fix."},{"lang":"es","value":"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: smb: cliente: corrección del use-after-free en crypt_message al usar criptografía asíncrona. La corrección CVE-2024-50047 eliminó el manejo de criptografía asíncrona de crypt_message(), asumiendo que todas las operaciones de criptografía son síncronas. Sin embargo, cuando se usan aceleradores de criptografía de hardware, esto puede causar fallos de use-after-free: crypt_message() // Asignar el búfer creq que contiene la solicitud creq = smb2_get_aead_req(..., &req); // El cifrado asíncrono devuelve -EINPROGRESS inmediatamente rc = enc ? crypto_aead_encrypt(req) : crypto_aead_decrypt(req); // Liberar creq mientras la operación asíncrona aún está en progreso kvfree_sensitive(creq, ...); Los módulos de criptografía de hardware a menudo implementan operaciones AEAD asíncronas para mejorar el rendimiento. Cuando crypto_aead_encrypt/decrypt() devuelve -EINPROGRESS, la operación se completa de forma asíncrona. Sin crypto_wait_req(), la función libera inmediatamente el búfer de solicitud, lo que provoca fallos cuando el controlador accede posteriormente a la memoria liberada. Esto genera una condición de use-after-free cuando el controlador de cifrado de hardware accede posteriormente a la estructura de solicitud liberada, lo que provoca fallos del kernel con desreferencias de punteros NULL. El problema se produce porque crypto_alloc_aead() con mask=0 no garantiza la operación síncrona. Incluso sin CRYPTO_ALG_ASYNC en la máscara, se pueden seleccionar implementaciones asíncronas. Solución restaurando el manejo de criptografía asíncrona: - DECLARE_CRYPTO_WAIT(wait) para seguimiento de finalización - aead_request_set_callback() para notificación de finalización asíncrona - crypto_wait_req() para esperar a que se complete la operación Esto garantiza que el búfer de solicitud no se libere hasta que se complete la operación de criptografía, ya sea sincrónica o asincrónica, al tiempo que se conserva la corrección CVE-2024-50047."}],"metrics":{"cvssMetricV31":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":5.9}]},"weaknesses":[{"source":"nvd@nist.gov","type":"Primary","description":[{"lang":"en","value":"CWE-416"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10.237","versionEndExcluding":"5.10.241","matchCriteriaId":"79C9B191-D12F-428B-9EEA-30BDCC83120A"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15.181","versionEndExcluding":"5.15.190","matchCriteriaId":"61ADEC7C-D645-4175-8A33-7EB9E14A8FF4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1.128","versionEndExcluding":"6.1.147","matchCriteriaId":"8D856FFA-04F3-4A37-9907-A0BCF6B2031E"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6.57","versionEndExcluding":"6.6.100","matchCriteriaId":"A4038CF7-63A2-4668-9428-4300CE199E7F"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.11.4","versionEndExcluding":"6.12.40","matchCriteriaId":"B5676E16-8352-46DA-ADBA-D1030B261D95"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.13","versionEndExcluding":"6.15.8","matchCriteriaId":"C7AFE5B0-F3B1-4D30-B8BF-EDA0385C4746"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.16:rc1:*:*:*:*:*:*","matchCriteriaId":"6D4894DB-CCFE-4602-B1BF-3960B2E19A01"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.16:rc2:*:*:*:*:*:*","matchCriteriaId":"09709862-E348-4378-8632-5A7813EDDC86"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.16:rc3:*:*:*:*:*:*","matchCriteriaId":"415BF58A-8197-43F5-B3D7-D1D63057A26E"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.16:rc4:*:*:*:*:*:*","matchCriteriaId":"A0517869-312D-4429-80C2-561086E1421C"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.16:rc5:*:*:*:*:*:*","matchCriteriaId":"85421F4E-C863-4ABF-B4B4-E887CC2F7F92"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.16:rc6:*:*:*:*:*:*","matchCriteriaId":"3827F0D4-5FEE-4181-B267-5A45E7CA11FC"}]}]},{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*","matchCriteriaId":"FA6FEEC2-9F11-4643-8827-749718254FED"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/15a0a5de49507062bc3be4014a403d8cea5533de","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/2a76bc2b24ed889a689fb1c9015307bf16aafb5b","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/5d047b12f86cc3b9fde1171c02d9bccf4dba0632","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/6550b2bef095d0dd2d2c8390d2ea4c3837028833","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/8ac90f6824fc44d2e55a82503ddfc95defb19ae0","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/9a1d3e8d40f151c2d5a5f40c410e6e433f62f438","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/b220bed63330c0e1733dc06ea8e75d5b9962b6b6","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Third Party Advisory"]},{"url":"https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Third Party Advisory"]}]}}]}