In the Linux kernel, the following vulnerability has been resolved:
ceph: drop messages from MDS when unmounting
When unmounting all the dirty buffers will be flushed and after the last osd request is finished the last reference of the i_count will be released. Then it will flush the dirty cap/snap to MDSs, and the unmounting won't wait the possible acks, which will ihold the inodes when updating the metadata locally but makes no sense any more, of this. This will make the evict_inodes() to skip these inodes.
If encrypt is enabled the kernel generate a warning when removing the encrypt keys when the skipped inodes still hold the keyring:
WARNING: CPU: 4 PID: 168846 at fs/crypto/keyring.c:242 fscrypt_destroy_keyring+0x7e/0xd0 CPU: 4 PID: 168846 Comm: umount Tainted: G S 6.1.0-rc5-ceph-g72ead199864c #1 Hardware name: Supermicro SYS-5018R-WR/X10SRW-F, BIOS 2.0 12/17/2015 RIP: 0010:fscrypt_destroy_keyring+0x7e/0xd0 RSP: 0018:ffffc9000b277e28 EFLAGS: 00010202 RAX: 0000000000000002 RBX: ffff88810d52ac00 RCX: ffff88810b56aa00 RDX: 0000000080000000 RSI: ffffffff822f3a09 RDI: ffff888108f59000 RBP: ffff8881d394fb88 R08: 0000000000000028 R09: 0000000000000000 R10: 0000000000000001 R11: 11ff4fe6834fcd91 R12: ffff8881d394fc40 R13: ffff888108f59000 R14: ffff8881d394f800 R15: 0000000000000000 FS: 00007fd83f6f1080(0000) GS:ffff88885fd00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f918d417000 CR3: 000000017f89a005 CR4: 00000000003706e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> generic_shutdown_super+0x47/0x120 kill_anon_super+0x14/0x30 ceph_kill_sb+0x36/0x90 [ceph] deactivate_locked_super+0x29/0x60 cleanup_mnt+0xb8/0x140 task_work_run+0x67/0xb0 exit_to_user_mode_prepare+0x23d/0x240 syscall_exit_to_user_mode+0x25/0x60 do_syscall_64+0x40/0x80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fd83dc39e9b
Later the kernel will crash when iput() the inodes and dereferencing the "sb->s_master_keys", which has been released by the generic_shutdown_super().
CVSS Details
- CVSS 3.1 Base Score: 5.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon_linux_2023 | — | Upgrade kernel-debuginfo-common-x86_64Upgrade python3-perfUpgrade kernel-libbpf-staticUpgrade kernelUpgrade kernel-headersUpgrade python3-perf-debuginfoUpgrade kernel-debuginfoUpgrade kernel-tools-debuginfoUpgrade kernel-libbpfUpgrade bpftoolUpgrade kernel-libbpf-develUpgrade perf-debuginfoUpgrade kernel-develUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-livepatch-6.1.56-82.125Upgrade bpftool-debuginfoUpgrade kernel-toolsUpgrade kernel-tools-develUpgrade perfUpgrade kernel-modules-extra | Feb 17, 2025 | Mar 2, 2024 |
| Debian | — | Upgrade linux | Jul 30, 2024 | Mar 2, 2024 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Mar 2, 2024 |
| Suse | — | Upgrade ocfs2-kmp-64kbUpgrade kernel-sourceUpgrade kselftests-kmp-64kbUpgrade kernel-rt-optionalUpgrade reiserfs-kmp-64kbUpgrade dtb-apmUpgrade kernel-debug-vdsoUpgrade kselftests-kmp-azureUpgrade kernel-azure-vdsoUpgrade kselftests-kmp-defaultUpgrade kernel-rt-extraUpgrade cluster-md-kmp-defaultUpgrade kernel-obs-qaUpgrade kernel-source-azureUpgrade kernel-default-extraUpgrade kernel-zfcpdumpUpgrade kernel-default-vdsoUpgrade kernel-kvmsmallUpgrade kernel-kvmsmall-vdsoUpgrade kernel-azure-develUpgrade dtb-lgUpgrade kernel-kvmsmall-develUpgrade kernel-rt-livepatch-develUpgrade kernel-syms-rtUpgrade dtb-rockchipUpgrade kernel-source-rtUpgrade kernel-syms-azureUpgrade cluster-md-kmp-azureUpgrade dlm-kmp-64kbUpgrade reiserfs-kmp-azureUpgrade kernel-debug-livepatch-develUpgrade dtb-qcomUpgrade kernel-obs-buildUpgrade dlm-kmp-azureUpgrade dtb-exynosUpgrade kernel-azure-livepatch-develUpgrade kernel-devel-azureUpgrade kernel-macrosUpgrade kernel-rtUpgrade gfs2-kmp-rtUpgrade dtb-amlogicUpgrade kernel-rt_debug-vdsoUpgrade kernel-rt-vdsoUpgrade ocfs2-kmp-rtUpgrade kernel-default-base-rebuildUpgrade dtb-mediatekUpgrade dtb-sprdUpgrade dtb-alteraUpgrade kernel-debug-develUpgrade dtb-hisiliconUpgrade dtb-allwinnerUpgrade kernel-debugUpgrade kernel-rt_debugUpgrade dtb-marvellUpgrade kernel-rt-livepatchUpgrade dtb-xilinxUpgrade dtb-amdUpgrade dlm-kmp-rtUpgrade kernel-rt-develUpgrade kernel-default-livepatchUpgrade kernel-azureUpgrade gfs2-kmp-azureUpgrade dlm-kmp-defaultUpgrade dtb-armUpgrade kernel-symsUpgrade dtb-freescaleUpgrade kernel-azure-extraUpgrade dtb-amazonUpgrade reiserfs-kmp-rtUpgrade kernel-default-livepatch-develUpgrade kernel-develUpgrade kernel-rt_debug-livepatch-develUpgrade kernel-defaultUpgrade kernel-64kb-livepatch-develUpgrade kernel-default-develUpgrade dtb-broadcomUpgrade cluster-md-kmp-64kbUpgrade kernel-default-baseUpgrade kernel-64kb-develUpgrade dtb-nvidiaUpgrade reiserfs-kmp-defaultUpgrade dtb-caviumUpgrade kernel-64kb-optionalUpgrade dtb-socionextUpgrade kernel-64kb-extraUpgrade gfs2-kmp-defaultUpgrade kernel-64kbUpgrade dtb-renesasUpgrade ocfs2-kmp-azureUpgrade kselftests-kmp-rtUpgrade kernel-docsUpgrade kernel-source-vanillaUpgrade dtb-appleUpgrade kernel-azure-optionalUpgrade kernel-kvmsmall-livepatch-develUpgrade cluster-md-kmp-rtUpgrade kernel-devel-rtUpgrade kernel-rt_debug-develUpgrade kernel-default-optionalUpgrade gfs2-kmp-64kbUpgrade ocfs2-kmp-defaultUpgrade kernel-docs-html | Aug 9, 2024 | Mar 2, 2024 |
| Ubuntu | — | No solution exists | Jun 26, 2025 | Mar 2, 2024 |
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