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CVE-2024-35832— bcachefs: kvfree bch_fs::snapshots in bch2_fs_snapshots_exit

AI Predicted 4.7 Difficulty: Trivial EPSS 0.18% · P8

Possible ATT&CK Techniques 1AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 6

VendorProductVersion RangeStatus
LinuxLinux1c6fdbd8f2465ddfb73a01ec620cbf3d14044e1a< 56590678791119b9a655202e49898edfb9307271affected
1c6fdbd8f2465ddfb73a01ec620cbf3d14044e1a< 369acf97d6fd5da620d053d0f1878ffe32eff555affected
6.7affected
< 6.7unaffected
6.7.5≤ 6.7.*unaffected
6.8≤ *unaffected
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I. Basic Information for CVE-2024-35832

Vulnerability Information
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Vulnerability Title
bcachefs: kvfree bch_fs::snapshots in bch2_fs_snapshots_exit
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: bcachefs: kvfree bch_fs::snapshots in bch2_fs_snapshots_exit bch_fs::snapshots is allocated by kvzalloc in __snapshot_t_mut. It should be freed by kvfree not kfree. Or umount will triger: [ 406.829178 ] BUG: unable to handle page fault for address: ffffe7b487148008 [ 406.830676 ] #PF: supervisor read access in kernel mode [ 406.831643 ] #PF: error_code(0x0000) - not-present page [ 406.832487 ] PGD 0 P4D 0 [ 406.832898 ] Oops: 0000 [#1] PREEMPT SMP PTI [ 406.833512 ] CPU: 2 PID: 1754 Comm: umount Kdump: loaded Tainted: G OE 6.7.0-rc7-custom+ #90 [ 406.834746 ] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Arch Linux 1.16.3-1-1 04/01/2014 [ 406.835796 ] RIP: 0010:kfree+0x62/0x140 [ 406.836197 ] Code: 80 48 01 d8 0f 82 e9 00 00 00 48 c7 c2 00 00 00 80 48 2b 15 78 9f 1f 01 48 01 d0 48 c1 e8 0c 48 c1 e0 06 48 03 05 56 9f 1f 01 <48> 8b 50 08 48 89 c7 f6 c2 01 0f 85 b0 00 00 00 66 90 48 8b 07 f6 [ 406.837810 ] RSP: 0018:ffffb9d641607e48 EFLAGS: 00010286 [ 406.838213 ] RAX: ffffe7b487148000 RBX: ffffb9d645200000 RCX: ffffb9d641607dc4 [ 406.838738 ] RDX: 000065bb00000000 RSI: ffffffffc0d88b84 RDI: ffffb9d645200000 [ 406.839217 ] RBP: ffff9a4625d00068 R08: 0000000000000001 R09: 0000000000000001 [ 406.839650 ] R10: 0000000000000001 R11: 000000000000001f R12: ffff9a4625d4da80 [ 406.840055 ] R13: ffff9a4625d00000 R14: ffffffffc0e2eb20 R15: 0000000000000000 [ 406.840451 ] FS: 00007f0a264ffb80(0000) GS:ffff9a4e2d500000(0000) knlGS:0000000000000000 [ 406.840851 ] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 406.841125 ] CR2: ffffe7b487148008 CR3: 000000018c4d2000 CR4: 00000000000006f0 [ 406.841464 ] Call Trace: [ 406.841583 ] <TASK> [ 406.841682 ] ? __die+0x1f/0x70 [ 406.841828 ] ? page_fault_oops+0x159/0x470 [ 406.842014 ] ? fixup_exception+0x22/0x310 [ 406.842198 ] ? exc_page_fault+0x1ed/0x200 [ 406.842382 ] ? asm_exc_page_fault+0x22/0x30 [ 406.842574 ] ? bch2_fs_release+0x54/0x280 [bcachefs] [ 406.842842 ] ? kfree+0x62/0x140 [ 406.842988 ] ? kfree+0x104/0x140 [ 406.843138 ] bch2_fs_release+0x54/0x280 [bcachefs] [ 406.843390 ] kobject_put+0xb7/0x170 [ 406.843552 ] deactivate_locked_super+0x2f/0xa0 [ 406.843756 ] cleanup_mnt+0xba/0x150 [ 406.843917 ] task_work_run+0x59/0xa0 [ 406.844083 ] exit_to_user_mode_prepare+0x197/0x1a0 [ 406.844302 ] syscall_exit_to_user_mode+0x16/0x40 [ 406.844510 ] do_syscall_64+0x4e/0xf0 [ 406.844675 ] entry_SYSCALL_64_after_hwframe+0x6e/0x76 [ 406.844907 ] RIP: 0033:0x7f0a2664e4fb
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于使用kfree 释放内存，而不是kvfree。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
LinuxLinux 1c6fdbd8f2465ddfb73a01ec620cbf3d14044e1a ~ 56590678791119b9a655202e49898edfb9307271 -
LinuxLinux 6.7 -

II. Public POCs for CVE-2024-35832

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III. Intelligence Information for CVE-2024-35832

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Other References for CVE-2024-35832 (2)

Same Patch Batch · Linux · 2024-05-17 · 135 CVEs total

CVE-2023-526879.8 CRITICALcrypto: safexcel - Add error handling for dma_map_sg() calls
CVE-2024-358438.8 HIGHiommu/vt-d: Use device rbtree in iopf reporting path
CVE-2024-358048.8 HIGHKVM: x86: Mark target gfn of emulated atomic instruction as dirty
CVE-2024-358118.8 HIGHwifi: brcmfmac: Fix use-after-free bug in brcmf_cfg80211_detach
CVE-2024-274168.8 HIGHBluetooth: hci_event: Fix handling of HCI_EV_IO_CAPA_REQUEST
CVE-2024-274158.8 HIGHnetfilter: bridge: confirm multicast packets before passing them up the stack
CVE-2024-358568.8 HIGHBluetooth: btusb: mediatek: Fix double free of skb in coredump
CVE-2024-358348.2 HIGHxsk: recycle buffer in case Rx queue was full
CVE-2024-274048.2 HIGHmptcp: fix data races on remote_id
CVE-2023-526698.2 HIGHcrypto: s390/aes - Fix buffer overread in CTR mode
CVE-2024-357898.0 HIGHwifi: mac80211: check/clear fast rx for non-4addr sta VLAN changes
CVE-2024-357937.8 HIGHdebugfs: fix wait/cancellation handling during remove
CVE-2023-526647.8 HIGHnet: atlantic: eliminate double free in error handling logic
CVE-2024-358107.8 HIGHdrm/vmwgfx: Fix the lifetime of the bo cursor memory
CVE-2024-358087.8 HIGHmd/dm-raid: don't call md_reap_sync_thread() directly
CVE-2023-526677.8 HIGHnet/mlx5e: fix a potential double-free in fs_any_create_groups
CVE-2024-357987.8 HIGHbtrfs: fix race in read_extent_buffer_pages()
CVE-2024-357917.8 HIGHKVM: SVM: Flush pages under kvm->lock to fix UAF in svm_register_enc_region()
CVE-2024-358397.8 HIGHnetfilter: bridge: replace physindev with physinif in nf_bridge_info
CVE-2024-358357.8 HIGHnet/mlx5e: fix a double-free in arfs_create_groups

Showing top 20 of 135 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-35832

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