Към съдържанието
Търсене

CVE-2026-89671: Linux

9.1

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.

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

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: nfsd: gate nfs3 setacl by argp->mask nfsd3_proc_setacl() calls set_posix_acl() unconditionally for both ACL_TYPE_ACCESS and ACL_TYPE_DEFAULT, passing argp->acl_access and argp->acl_default verbatim. The NFSv3 ACL decoder only populates those pointers when the corresponding mask bit is set: nfs3svc_decode_setaclargs() if (args->mask & NFS_ACL) decode into acl_access if (args->mask & NFS_DFACL) decode into acl_default /* otherwise the pointer stays NULL (pc_argzero) */ nfsd3_proc_setacl() set_posix_acl(.., ACL_TYPE_ACCESS, argp->acl_access) set_posix_acl(.., ACL_TYPE_DEFAULT, argp->acl_default) set_posix_acl(idmap, dentry, type, NULL) is the VFS "remove this ACL type" operation. A NULL pointer that means "the client did not send this arm" is therefore indistinguishable from "the client asked to remove this ACL". A SETACL with mask=NFS_ACL silently drops the directory's default ACL; mask=0 drops both. The sibling nfsd3_proc_getacl() already consults argp->mask before touching each arm; mirror that in setacl. Fix by wrapping each set_posix_acl() call in the matching mask bit check and initializing error to 0 before inode_lock so that a request with neither bit set leaves the on-disk ACLs untouched and returns nfs_ok. The out_drop_lock path and the unconditional posix_acl_release() at out: are preserved; both NULL-tolerate the skipped arms.

Засегнати продукти

  • Linux Linux: a257cdd0e2179630d3201c32ba14d7fcb3c3a055 преди beeb33152873ad40692bd255b562966f8ba43dbd; a257cdd0e2179630d3201c32ba14d7fcb3c3a055 преди 3be1d8611dae4829e4608007db29f4a8748c37b2; a257cdd0e2179630d3201c32ba14d7fcb3c3a055 преди 68a80b26efdff1d09f8ae1773c6a915abb9e191d; a257cdd0e2179630d3201c32ba14d7fcb3c3a055 преди b3bff820d068ea59767d4e91a3258231a879da5f; a257cdd0e2179630d3201c32ba14d7fcb3c3a055 преди ff99ed007f065198fd723152405c22aa558f700b; a257cdd0e2179630d3201c32ba14d7fcb3c3a055 преди 453d7198a0ab07a12d46e0575861ac7b932da17e
  • Linux Linux: 2.6.13; преди 2.6.13; 6.1.191 до 6.1.*; 6.6.157 до 6.6.*; 6.12.109 до 6.12.*; 6.18.50 до 6.18.*; 7.2.4 до 7.2.*; 7.3 до *

История

  • 11 септември 2026 Публикувано

Други уязвимости в Linux Linux

Първоизточници

CVE-2026-89671: Linux | freedomonline.bg