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-tools-develUpgrade kernel-toolsUpgrade kernel-modules-extraUpgrade kernel-develUpgrade kernel-livepatch-6.1.56-82.125Upgrade kernel-debuginfo-common-aarch64Upgrade bpftool-debuginfoUpgrade perf-debuginfoUpgrade perfUpgrade kernel-tools-debuginfoUpgrade kernel-libbpf-develUpgrade kernel-headersUpgrade bpftoolUpgrade python3-perfUpgrade python3-perf-debuginfoUpgrade kernel-libbpf-staticUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-debuginfoUpgrade kernelUpgrade kernel-libbpf | 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 dtb-apmUpgrade reiserfs-kmp-64kbUpgrade gfs2-kmp-rtUpgrade ocfs2-kmp-64kbUpgrade kernel-rtUpgrade kernel-kvmsmall-vdsoUpgrade dlm-kmp-azureUpgrade kernel-azure-develUpgrade kernel-default-extraUpgrade kernel-syms-rtUpgrade kernel-kvmsmallUpgrade kernel-kvmsmall-develUpgrade kernel-zfcpdumpUpgrade kernel-devel-azureUpgrade kernel-default-vdsoUpgrade dtb-lgUpgrade kernel-rt-extraUpgrade kselftests-kmp-64kbUpgrade dtb-amlogicUpgrade kernel-source-rtUpgrade kselftests-kmp-azureUpgrade cluster-md-kmp-defaultUpgrade reiserfs-kmp-azureUpgrade dtb-qcomUpgrade kernel-rt_debug-vdsoUpgrade ocfs2-kmp-rtUpgrade kernel-rt-livepatch-develUpgrade kernel-source-azureUpgrade kernel-debug-livepatch-develUpgrade kernel-obs-buildUpgrade kernel-rt-vdsoUpgrade cluster-md-kmp-azureUpgrade dlm-kmp-64kbUpgrade kernel-syms-azureUpgrade dtb-rockchipUpgrade dtb-exynosUpgrade kernel-azure-vdsoUpgrade kernel-macrosUpgrade kernel-default-base-rebuildUpgrade kselftests-kmp-defaultUpgrade kernel-sourceUpgrade kernel-debug-vdsoUpgrade kernel-rt-optionalUpgrade kernel-azure-livepatch-develUpgrade kernel-obs-qaUpgrade kernel-64kb-livepatch-develUpgrade kernel-rt_debug-livepatch-develUpgrade kernel-rt_debugUpgrade kernel-default-optionalUpgrade cluster-md-kmp-64kbUpgrade dtb-broadcomUpgrade dtb-allwinnerUpgrade kernel-docs-htmlUpgrade kernel-debug-develUpgrade kernel-default-baseUpgrade kernel-defaultUpgrade kernel-azure-extraUpgrade kernel-rt-develUpgrade kernel-default-livepatchUpgrade kernel-azureUpgrade gfs2-kmp-azureUpgrade dtb-appleUpgrade dlm-kmp-rtUpgrade dlm-kmp-defaultUpgrade reiserfs-kmp-rtUpgrade ocfs2-kmp-azureUpgrade kselftests-kmp-rtUpgrade kernel-kvmsmall-livepatch-develUpgrade kernel-docsUpgrade kernel-64kbUpgrade gfs2-kmp-defaultUpgrade dtb-renesasUpgrade dtb-amazonUpgrade kernel-rt_debug-develUpgrade dtb-amdUpgrade kernel-default-livepatch-develUpgrade cluster-md-kmp-rtUpgrade kernel-devel-rtUpgrade kernel-source-vanillaUpgrade kernel-azure-optionalUpgrade kernel-rt-livepatchUpgrade dtb-xilinxUpgrade kernel-debugUpgrade dtb-marvellUpgrade dtb-mediatekUpgrade dtb-sprdUpgrade gfs2-kmp-64kbUpgrade kernel-64kb-optionalUpgrade dtb-caviumUpgrade dtb-nvidiaUpgrade kernel-64kb-extraUpgrade kernel-64kb-develUpgrade dtb-alteraUpgrade dtb-freescaleUpgrade dtb-socionextUpgrade reiserfs-kmp-defaultUpgrade ocfs2-kmp-defaultUpgrade dtb-hisiliconUpgrade kernel-develUpgrade dtb-armUpgrade kernel-default-develUpgrade kernel-syms | Aug 9, 2024 | Mar 2, 2024 |
| Ubuntu | — | No solution exists | Jun 26, 2025 | Mar 2, 2024 |
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