In the Linux kernel, the following vulnerability has been resolved:
tpm: efi: Use local variable for calculating final log size
When tpm_read_log_efi is called multiple times, which happens when one loads and unloads a TPM2 driver multiple times, then the global variable efi_tpm_final_log_size will at some point become a negative number due to the subtraction of final_events_preboot_size occurring each time. Use a local variable to avoid this integer underflow.
The following issue is now resolved:
Mar 8 15:35:12 hibinst kernel: Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015 Mar 8 15:35:12 hibinst kernel: Workqueue: tpm-vtpm vtpm_proxy_work [tpm_vtpm_proxy] Mar 8 15:35:12 hibinst kernel: RIP: 0010:__memcpy+0x12/0x20 Mar 8 15:35:12 hibinst kernel: Code: 00 b8 01 00 00 00 85 d2 74 0a c7 05 44 7b ef 00 0f 00 00 00 c3 cc cc cc 66 66 90 66 90 48 89 f8 48 89 d1 48 c1 e9 03 83 e2 07 <f3> 48 a5 89 d1 f3 a4 c3 66 0f 1f 44 00 00 48 89 f8 48 89 d1 f3 a4 Mar 8 15:35:12 hibinst kernel: RSP: 0018:ffff9ac4c0fcfde0 EFLAGS: 00010206 Mar 8 15:35:12 hibinst kernel: RAX: ffff88f878cefed5 RBX: ffff88f878ce9000 RCX: 1ffffffffffffe0f Mar 8 15:35:12 hibinst kernel: RDX: 0000000000000003 RSI: ffff9ac4c003bff9 RDI: ffff88f878cf0e4d Mar 8 15:35:12 hibinst kernel: RBP: ffff9ac4c003b000 R08: 0000000000001000 R09: 000000007e9d6073 Mar 8 15:35:12 hibinst kernel: R10: ffff9ac4c003b000 R11: ffff88f879ad3500 R12: 0000000000000ed5 Mar 8 15:35:12 hibinst kernel: R13: ffff88f878ce9760 R14: 0000000000000002 R15: ffff88f77de7f018 Mar 8 15:35:12 hibinst kernel: FS: 0000000000000000(0000) GS:ffff88f87bd00000(0000) knlGS:0000000000000000 Mar 8 15:35:12 hibinst kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 Mar 8 15:35:12 hibinst kernel: CR2: ffff9ac4c003c000 CR3: 00000001785a6004 CR4: 0000000000060ee0 Mar 8 15:35:12 hibinst kernel: Call Trace: Mar 8 15:35:12 hibinst kernel: tpm_read_log_efi+0x152/0x1a7 Mar 8 15:35:12 hibinst kernel: tpm_bios_log_setup+0xc8/0x1c0 Mar 8 15:35:12 hibinst kernel: tpm_chip_register+0x8f/0x260 Mar 8 15:35:12 hibinst kernel: vtpm_proxy_work+0x16/0x60 [tpm_vtpm_proxy] Mar 8 15:35:12 hibinst kernel: process_one_work+0x1b4/0x370 Mar 8 15:35:12 hibinst kernel: worker_thread+0x53/0x3e0 Mar 8 15:35:12 hibinst kernel: ? process_one_work+0x370/0x370
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade kernel-tools-debuginfoUpgrade kernel-headersUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-debuginfoUpgrade perf-debuginfoUpgrade kernelUpgrade python-perf-debuginfoUpgrade bpftool-debuginfoUpgrade python-perfUpgrade kernel-tools-develUpgrade perfUpgrade kernel-debuginfo-common-aarch64Upgrade bpftoolUpgrade kernel-toolsUpgrade kernel-devel | May 28, 2024 | Feb 27, 2024 |
| Debian | — | Upgrade linux | Jul 30, 2024 | Feb 27, 2024 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Feb 27, 2024 |
| Suse | — | Upgrade kernel-symsUpgrade kernel-64kb-develUpgrade kernel-develUpgrade reiserfs-kmp-defaultUpgrade kernel-macrosUpgrade kernel-sourceUpgrade kernel-zfcpdumpUpgrade kernel-64kbUpgrade kernel-default-develUpgrade kernel-preemptUpgrade kernel-preempt-develUpgrade kernel-docsUpgrade kernel-obs-buildUpgrade kernel-defaultUpgrade kernel-default-base | Aug 9, 2024 | Feb 27, 2024 |
| Ubuntu | — | Upgrade linux-azure-fipsUpgrade linux-azureUpgrade linux-gkeopUpgrade linux-aws-5.4Upgrade linux-kvmUpgrade linux-oracleUpgrade linux-fipsUpgrade linux-raspiUpgrade linux-gcp-5.4Upgrade linux-gcpUpgrade linux-oracle-5.4Upgrade linux-hwe-5.4Upgrade linux-aws-fipsUpgrade linuxUpgrade linux-bluefieldUpgrade linux-gcp-fipsUpgrade linux-azure-5.4Upgrade linux-raspi-5.4Upgrade linux-aws | Nov 19, 2024 | Feb 27, 2024 |
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