CentOS Linux 6 主機安裝的套件會受到 TuxCare CENTOS6：CLSA-2026：1787292891 公告中提及的多個弱點影響。

  - 已解決 Linux 核心中的下列弱點：NFSv4: include MAY_WRITE in open permission mask for O_TRUNC POSIX requires write permission to truncate a file, so an open() that specifies O_TRUNC must be authorized for write access regardless of the O_ACCMODE access mode.
    nfs_open_permission_mask() builds the access mask passed to nfs_may_open(), which is the local authorization gate for OPENs the client serves itself from a cached write delegation via the can_open_delegated() path in nfs4_try_open_cached(). The mask is derived from O_ACCMODE alone, so an open(O_RDONLY | O_TRUNC) against a file the caller cannot write requests only MAY_READ and passes the local check. The OPEN is then satisfied locally and the truncation is issued to the server as a SETATTR(size=0) over the delegation stateid, which the server accepts under standard write-delegation semantics. POSIX requires that this open fail with EACCES. Include MAY_WRITE in the mask whenever O_TRUNC is set so the local check matches the access the server would have enforced. (CVE-2026-64298)

  - 已解決 Linux 核心中的下列弱點：sctp: don't free the ASCONF's own transport in DEL-IP processing sctp_process_asconf() caches the transport the ASCONF chunk is processed against in asconf->transport (== chunk->transport, set once in sctp_rcv()). For an ASCONF located through its Address Parameter by __sctp_rcv_asconf_lookup(), that cached transport corresponds to the Address Parameter, which need not be the packet's source address. sctp_process_asconf_param() rejects a DEL-IP for the packet source address (ADDIP D8, SCTP_ERROR_DEL_SRC_IP), but nothing protects asconf->transport. A single ASCONF can therefore carry, in order: [Address Parameter L] [DEL-IP L] [DEL-IP 0.0.0.0] where L differs from the source. The DEL-IP for L passes the D8 check and calls sctp_assoc_rm_peer() on the transport that asconf->transport still points at, freeing it (RCU-deferred). The following wildcard DEL-IP then reuses the now-dangling asconf->transport in sctp_assoc_set_primary() and sctp_assoc_del_nonprimary_peers(): set_primary() dereferences the freed transport (->ipaddr, ->state) and plants the dangling pointer into asoc->peer.primary_path / active_path, and del_nonprimary_peers(), keeping only the pointer that is no longer on the list, removes every real transport, leaving the association with a transport_count of 0 and primary_path/active_path pointing at freed memory. Reject a DEL-IP that targets the transport the ASCONF is being processed against, mirroring the existing source-address guard, so the wildcard branch can never reuse a freed transport. (CVE-2026-64564)

請注意，Nessus 並未測試這些問題，而是僅依據應用程式自我報告的版本號碼作出判斷。

偵測

CentOS Linux 6 [TuxCare] 安全性更新：核心 / kernel-abi-whitelists / kernel-debug / kernel-debug-devel / etc 多個弱點（CENTOS6：CLSA-2026：1787292891）

critical Nessus Plugin ID 360321

偵測

CentOS Linux 6 [TuxCare] 安全性更新：核心 / kernel-abi-whitelists / kernel-debug / kernel-debug-devel / etc 多個弱點 （CENTOS6：CLSA-2026：1787292891）

critical Nessus Plugin ID 360321

CentOS Linux 6 [TuxCare] 安全性更新：核心 / kernel-abi-whitelists / kernel-debug / kernel-debug-devel / etc 多個弱點（CENTOS6：CLSA-2026：1787292891）