In the Linux kernel, the following vulnerability has been resolved: ceph: prevent use-after-free in encode_cap_msg() In fs/ceph/caps.c, in encode_cap_msg(), "use after free" error was caught by KASAN at this line - 'ceph_buffer_get(arg->xattr_buf);'. This implies before the refcount could be increment here, it was freed. In same file, in "handle_cap_grant()" refcount is decremented by this line - 'ceph_buffer_put(ci->i_xattrs.blob);'. It appears that a race occurred and resource was freed by the latter line before the former line could increment it. encode_cap_msg() is called by __send_cap() and __send_cap() is called by ceph_check_caps() after calling __prep_cap(). __prep_cap() is where arg->xattr_buf is assigned to ci->i_xattrs.blob. This is the spot where the refcount must be increased to prevent "use after free" error.

ID	Name	Product	Family	Severity
197174	SUSE SLED15 / SLES15 / openSUSE 15 Security Update : kernel (SUSE-SU-2024:1659-1)	Nessus	SuSE Local Security Checks	high
197173	SUSE SLES15 Security Update : kernel (SUSE-SU-2024:1650-1)	Nessus	SuSE Local Security Checks	high
197101	Ubuntu 20.04 LTS / 22.04 LTS : Linux kernel vulnerabilities (USN-6766-2)	Nessus	Ubuntu Local Security Checks	high
197057	SUSE SLES12 Security Update : kernel (SUSE-SU-2024:1646-1)	Nessus	SuSE Local Security Checks	high
197055	SUSE SLES12 Security Update : kernel (SUSE-SU-2024:1643-1)	Nessus	SuSE Local Security Checks	high
197051	SUSE SLES15 Security Update : kernel (SUSE-SU-2024:1641-1)	Nessus	SuSE Local Security Checks	high
197048	SUSE SLED12 / SLES12 Security Update : kernel (SUSE-SU-2024:1648-1)	Nessus	SuSE Local Security Checks	high
197045	SUSE SLES15 Security Update : kernel (SUSE-SU-2024:1642-1)	Nessus	SuSE Local Security Checks	high
195662	RHEL 6 : kernel (Unpatched Vulnerability)	Nessus	Red Hat Local Security Checks	critical
195652	RHEL 7 : kernel (Unpatched Vulnerability)	Nessus	Red Hat Local Security Checks	critical
195134	Ubuntu 20.04 LTS / 22.04 LTS : Linux kernel vulnerabilities (USN-6766-1)	Nessus	Ubuntu Local Security Checks	high
195025	Debian dsa-5681 : affs-modules-5.10.0-29-4kc-malta-di - security update	Nessus	Debian Local Security Checks	high
194976	SUSE SLES15 / openSUSE 15 Security Update : kernel (SUSE-SU-2024:1490-1)	Nessus	SuSE Local Security Checks	high
193309	Debian dsa-5658 : affs-modules-6.1.0-11-4kc-malta-di - security update	Nessus	Debian Local Security Checks	high

Detections

Analytics

CVE-2024-26689

medium

Tenable Plugins

high

high

high

high

high

high

high

high

critical

critical

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high