ksmbd: fix use-after-free from async crypto on Qualcomm crypto engine (Linux Linux)

CVE-2026-53046
CRITICAL 9.8

En bref

Source
NVD
EPSS
EPSS 0.72 % · centile 54 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Analyzed

Description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free from async crypto on Qualcomm crypto engine ksmbd_crypt_message() sets a NULL completion callback on AEAD requests and does not handle the -EINPROGRESS return code from async hardware crypto engines like the Qualcomm Crypto Engine (QCE). When QCE returns -EINPROGRESS, ksmbd treats it as an error and immediately frees the request while the hardware DMA operation is still in flight. The DMA completion callback then dereferences freed memory, causing a NULL pointer crash: pc : qce_skcipher_done+0x24/0x174 lr : vchan_complete+0x230/0x27c ... el1h_64_irq+0x68/0x6c ksmbd_free_work_struct+0x20/0x118 [ksmbd] ksmbd_exit_file_cache+0x694/0xa4c [ksmbd] Use the standard crypto_wait_req() pattern with crypto_req_done() as the completion callback, matching the approach used by the SMB client in fs/smb/client/smb2ops.c. This properly handles both synchronous engines (immediate return) and async engines (-EINPROGRESS followed by callback notification).

Faiblesses (CWE)

  • CWE-416 — Utilisation après libération

Références

Scores

VersionScoreVecteurÉvalué par
CVSS 3.1CRITICAL 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HLinux
CVSS 3.1CRITICAL 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HNVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary)

Références européennes

Avis du CERT-FR

Configurations affectées (CPE NVD)

Produits affectés

ProduitVersions
Linux · Linuxaffected e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 < 57b47231055b431ed0a1a55f33cac32981564405 ; affected e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 < cc2da381875d4a67026e4c8feb3dba51a2a2d1bc ; affected e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 < 8fcefe840fa8c14ce667768e5b043286ac3bbcbe ; affected e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 < 8ef183216feaa24b66b940510d8b68f680eb56e9 ; affected e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 < 7164b3953cefd540e7ebca828c793bc6869cfbc4 ; affected e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 < b46aa129fa2807bfe1545fe74d9295d53c51520b
Linux · Linuxaffected 5.15 ; unaffected 0 < 5.15 ; unaffected 5.15.209 ≤ 5.15.* ; unaffected 6.1.175 ≤ 6.1.* ; unaffected 6.6.141 ≤ 6.6.* ; unaffected 6.12.91 ≤ 6.12.*

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD