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Ubuntu: (CVE-2024-35832): linux-raspi-realtime vulnerability

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Ubuntu: (CVE-2024-35832): linux-raspi-realtime vulnerability

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
05/17/2024
Created
02/12/2025
Added
02/11/2025
Modified
02/11/2025

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 OE6.7.0-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

Solution(s)

  • ubuntu-upgrade-linux-raspi-realtime

References

  • https://attackerkb.com/topics/cve-2024-35832
  • CVE - 2024-35832
  • https://git.kernel.org/linus/369acf97d6fd5da620d053d0f1878ffe32eff555
  • https://git.kernel.org/stable/c/369acf97d6fd5da620d053d0f1878ffe32eff555
  • https://git.kernel.org/stable/c/56590678791119b9a655202e49898edfb9307271
  • https://www.cve.org/CVERecord?id=CVE-2024-35832
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  • 已创建
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