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CVE-2026-53397: Linux, отказ на услуга

7.5

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: nfsd: fix posix_acl leak on SETACL decode failure nfsaclsvc_decode_setaclargs() and nfs3svc_decode_setaclargs() each call nfs_stream_decode_acl() twice, first for NFS_ACL and then for NFS_DFACL. Each successful call transfers ownership of a freshly allocated posix_acl into argp->acl_access or argp->acl_default. If the first call succeeds but the second fails, the decoder returns false and argp->acl_access is left dangling. ACLPROC2_SETACL.pc_release was wired to nfssvc_release_attrstat and ACLPROC3_SETACL.pc_release was wired to nfs3svc_release_fhandle. Both only call fh_put() and have no knowledge of the ACL fields on argp. The posix_acl_release() pairs sat at the out: labels inside nfsacld_proc_setacl() and nfsd3_proc_setacl(), but svc_process() skips pc_func when pc_decode returns false, so that cleanup is unreachable on decode failure: svc_process_common() pc_decode() /* decode_setaclargs: false */ /* pc_func skipped */ pc_release() /* fh_put only -- ACLs leaked */ The orphaned posix_acl is leaked for the lifetime of the server. Fix by adding nfsaclsvc_release_setacl() and nfs3svc_release_setacl(), which release both argp->acl_access and argp->acl_default in addition to fh_put(), and wiring them as pc_release for their respective SETACL procedures. pc_release runs on every path svc_process() takes after decode, including decode failure, so the posix_acl_release() pairs are removed from the proc functions' out: labels to keep ownership in one place. This matches the existing release_getacl() pattern used by the sibling GETACL procedures.

Засегнати продукти

  • Linux Linux: a257cdd0e2179630d3201c32ba14d7fcb3c3a055 преди b2eb1ffd511d1b3c3e21122f97cbbccea411e277; a257cdd0e2179630d3201c32ba14d7fcb3c3a055 преди b94c4be77682aab06d65ca7296149e3bcfb37353; a257cdd0e2179630d3201c32ba14d7fcb3c3a055 преди 887f92ceccf3eacd5f2402db21254d66372fae00; a257cdd0e2179630d3201c32ba14d7fcb3c3a055 преди 1e96239fddcefacf6afe6c498357be68eacbcabc; a257cdd0e2179630d3201c32ba14d7fcb3c3a055 преди bd69a825485168ef74e815ecb286754b570fdcc7; a257cdd0e2179630d3201c32ba14d7fcb3c3a055 преди 136b416593f1349cf6f72c8e3d18f0f204ee8545; a257cdd0e2179630d3201c32ba14d7fcb3c3a055 преди a5b42c1e4ff2befaa6b96f7cbf32174751eba083; a257cdd0e2179630d3201c32ba14d7fcb3c3a055 преди 0853ac544c590880d797b04daa33fcb72b6be0e1
  • Linux Linux: 2.6.13; преди 2.6.13; 5.10.260 до 5.10.*; 5.15.211 до 5.15.*; 6.1.177 до 6.1.*; 6.6.144 до 6.6.*; 6.12.95 до 6.12.*; 6.18.38 до 6.18.*; 7.1.3 до 7.1.*; 7.2 до *

Вид слабост

История

  • 19 юли 2026 Публикувано

Други уязвимости в Linux Linux

Първоизточници

CVE-2026-53397: Linux, отказ на услуга | freedomonline.bg