Updated: 2025-01-14 17:56:08.535633
Description:
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.
Links | NIST | CIRCL | RHEL | Ubuntu |
Severity | Score | |
---|---|---|
CVSS Version 2.x | 0 | |
CVSS Version 3.x | HIGH | 7.8 |
OS name | Project name | Version | Score | Severity | Status | Errata | Last updated | Statement |
---|---|---|---|---|---|---|---|---|
AlmaLinux 9.2 ESU | kernel | 5.14.0 | 7.8 | HIGH | Released | CLSA-2025:1738671431 | 2025-02-05 02:16:14 | |
AlmaLinux 9.2 FIPS | kernel | 5.14.0 | 7.8 | HIGH | Released | CLSA-2025:1738670922 | 2025-02-05 02:16:15 | |
CentOS 6 ELS | kernel | 2.6.32 | 7.8 | HIGH | Needs Triage | 2025-01-14 13:46:58 | ||
CentOS 7 ELS | kernel | 3.10.0 | 7.8 | HIGH | In Rollout | CLSA-2025:1738672047 | 2025-02-05 02:16:13 | |
CentOS 8.4 ELS | kernel | 4.18.0 | 7.8 | HIGH | In Progress | 2025-02-07 06:36:28 | ||
CentOS 8.5 ELS | kernel | 4.18.0 | 7.8 | HIGH | Needs Triage | 2025-01-14 13:47:03 | ||
CentOS Stream 8 ELS | kernel | 4.18.0 | 7.8 | HIGH | Released | CLSA-2025:1738592614 | 2025-02-04 02:14:05 | |
CloudLinux 6 ELS | kernel | 2.6.32 | 7.8 | HIGH | Needs Triage | 2025-01-14 13:46:59 | ||
CloudLinux 7 ELS | kernel | 3.10.0 | 7.8 | HIGH | Needs Triage | 2025-01-14 13:47:10 | ||
Oracle Linux 6 ELS | kernel | 2.6.32 | 7.8 | HIGH | Needs Triage | 2025-01-14 13:47:07 |