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Vulnerability · Published Aug 26, 2024 · Assigned by Linux

CVE-2024-44942f2fs: fix to do sanity check on F2FS_INLINE_DATA flag in inode during GC

High 7.8

In plain English

A high-severity security flaw in Linux from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 13% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.2%top 86.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to do sanity check on F2FS_INLINE_DATA flag in inode during GC syzbot reports a f2fs bug as below: ------------[ cut here ]------------ kernel BUG at fs/f2fs/inline.c:258! CPU: 1 PID: 34 Comm: kworker/u8:2 Not tainted 6.9.0-rc6-syzkaller-00012-g9e4bc4bcae01 #0 RIP: 0010:f2fs_write_inline_data+0x781/0x790 fs/f2fs/inline.c:258 Call Trace: f2fs_write_single_data_page+0xb65/0x1d60 fs/f2fs/data.c:2834 f2fs_write_cache_pages fs/f2fs/data.c:3133 [inline] __f2fs_write_data_pages fs/f2fs/data.c:3288 [inline] f2fs_write_data_pages+0x1efe/0x3a90 fs/f2fs/data.c:3315 do_writepages+0x35b/0x870 mm/page-writeback.c:2612 __writeback_single_inode+0x165/0x10b0 fs/fs-writeback.c:1650 writeback_sb_inodes+0x905/0x1260 fs/fs-writeback.c:1941 wb_writeback+0x457/0xce0 fs/fs-writeback.c:2117 wb_do_writeback fs/fs-writeback.c:2264 [inline] wb_workfn+0x410/0x1090 fs/fs-writeback.c:2304 process_one_work kernel/workqueue.c:3254 [inline] process_scheduled_works+0xa12/0x17c0 kernel/workqueue.c:3335 worker_thread+0x86d/0xd70 kernel/workqueue.c:3416 kthread+0x2f2/0x390 kernel/kthread.c:388 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 The root cause is: inline_data inode can be fuzzed, so that there may be valid blkaddr in its direct node, once f2fs triggers background GC to migrate the block, it will hit f2fs_bug_on() during dirty page writeback. Let's add sanity check on F2FS_INLINE_DATA flag in inode during GC, so that, it can forbid migrating inline_data inode's data block for fixing.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linuxno fix listedDEBIAN-CVE-2024-44942
Debian:13linux6.10.6-1DEBIAN-CVE-2024-44942
Debian:14linux6.10.6-1DEBIAN-CVE-2024-44942
Ubuntu:22.04:LTSlinux5.15.0-127.137USN-7166-1
Ubuntu:22.04:LTSlinux5.15.0-127.137UBUNTU-CVE-2024-44942
Ubuntu:24.04:LTSlinux6.8.0-50.51UBUNTU-CVE-2024-44942
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2024-44942
Ubuntu:22.04:LTSlinux-aws5.15.0-1073.79UBUNTU-CVE-2024-44942
Ubuntu:22.04:LTSlinux-aws5.15.0-1073.79USN-7166-2
Ubuntu:24.04:LTSlinux-aws6.8.0-1020.22UBUNTU-CVE-2024-44942
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2024-44942
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2024-44942
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2024-44942
Ubuntu:22.04:LTSlinux-aws-6.86.8.0-1020.22~22.04.1UBUNTU-CVE-2024-44942
Ubuntu:22.04:LTSlinux-azure5.15.0-1078.87USN-7186-2
Ubuntu:22.04:LTSlinux-azure5.15.0-1078.87UBUNTU-CVE-2024-44942
Ubuntu:24.04:LTSlinux-azure6.8.0-1020.23UBUNTU-CVE-2024-44942
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2024-44942
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2024-44942
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2024-44942
Ubuntu:22.04:LTSlinux-azure-6.86.8.0-1020.23~22.04.1UBUNTU-CVE-2024-44942
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1078.87.1UBUNTU-CVE-2024-44942
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2024-44942
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2024-44942
Ubuntu:22.04:LTSlinux-gcp5.15.0-1072.80UBUNTU-CVE-2024-44942
Ubuntu:22.04:LTSlinux-gcp5.15.0-1072.80USN-7166-1
Ubuntu:24.04:LTSlinux-gcp6.8.0-1019.21UBUNTU-CVE-2024-44942
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2024-44942
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2024-44942
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2024-44942
Ubuntu:22.04:LTSlinux-gcp-6.86.8.0-1019.21~22.04.1UBUNTU-CVE-2024-44942
Ubuntu:22.04:LTSlinux-gke5.15.0-1070.76USN-7166-1
Ubuntu:22.04:LTSlinux-gke5.15.0-1070.76UBUNTU-CVE-2024-44942
Ubuntu:24.04:LTSlinux-gke6.8.0-1015.19UBUNTU-CVE-2024-44942
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1056.63USN-7166-1
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1056.63UBUNTU-CVE-2024-44942
Ubuntu:24.04:LTSlinux-gkeop6.8.0-1002.4UBUNTU-CVE-2024-44942
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2024-44942
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2024-44942
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2024-44942
Ubuntu:22.04:LTSlinux-hwe-6.86.8.0-50.51~22.04.1UBUNTU-CVE-2024-44942
Ubuntu:22.04:LTSlinux-ibm5.15.0-1066.69UBUNTU-CVE-2024-44942
Ubuntu:22.04:LTSlinux-ibm5.15.0-1066.69USN-7166-1
Ubuntu:24.04:LTSlinux-ibm6.8.0-1017.17UBUNTU-CVE-2024-44942
Ubuntu:22.04:LTSlinux-ibm-6.86.8.0-1017.17~22.04.1UBUNTU-CVE-2024-44942
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1071.77UBUNTU-CVE-2024-44942
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1071.77USN-7186-1
Ubuntu:22.04:LTSlinux-kvm5.15.0-1070.75UBUNTU-CVE-2024-44942
Ubuntu:22.04:LTSlinux-kvm5.15.0-1070.75USN-7166-1
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-127.137UBUNTU-CVE-2024-44942
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-127.137USN-7166-1
Ubuntu:24.04:LTSlinux-lowlatency6.8.0-50.51.1UBUNTU-CVE-2024-44942
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2024-44942
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2024-44942
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2024-44942
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.86.8.0-50.51.1~22.04.1UBUNTU-CVE-2024-44942
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1068.69USN-7166-1
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1068.69UBUNTU-CVE-2024-44942
Ubuntu:24.04:LTSlinux-nvidia6.8.0-1019.21UBUNTU-CVE-2024-44942
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2024-44942
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2024-44942
Ubuntu:22.04:LTSlinux-nvidia-6.86.8.0-1019.21~22.04.1UBUNTU-CVE-2024-44942
Ubuntu:24.04:LTSlinux-nvidia-lowlatency6.8.0-1019.21.1UBUNTU-CVE-2024-44942
Ubuntu:22.04:LTSlinux-nvidia-tegra5.15.0-1032.32UBUNTU-CVE-2024-44942
Ubuntu:22.04:LTSlinux-nvidia-tegra-igx5.15.0-1020.20UBUNTU-CVE-2024-44942
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2024-44942
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2024-44942
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2024-44942
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2024-44942
Ubuntu:24.04:LTSlinux-oem-6.86.8.0-1018.18UBUNTU-CVE-2024-44942
Ubuntu:22.04:LTSlinux-oracle5.15.0-1071.77USN-7166-1
Ubuntu:22.04:LTSlinux-oracle5.15.0-1071.77UBUNTU-CVE-2024-44942
Ubuntu:24.04:LTSlinux-oracle6.8.0-1017.18UBUNTU-CVE-2024-44942
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2024-44942
Ubuntu:22.04:LTSlinux-oracle-6.86.8.0-1017.18~22.04.1UBUNTU-CVE-2024-44942
Ubuntu:22.04:LTSlinux-raspi5.15.0-1066.69UBUNTU-CVE-2024-44942
Ubuntu:22.04:LTSlinux-raspi5.15.0-1066.69USN-7166-1
Ubuntu:24.04:LTSlinux-raspi6.8.0-1016.18UBUNTU-CVE-2024-44942
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2024-44942
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2024-44942
Ubuntu:24.04:LTSlinux-riscv6.8.0-50.51.1UBUNTU-CVE-2024-44942
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2024-44942
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2024-44942
Ubuntu:22.04:LTSlinux-riscv-6.86.8.0-50.51.1~22.04.1UBUNTU-CVE-2024-44942
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2024-44942
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2024-44942
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2024-44942
Ubuntu:24.04:LTSlinux-xilinx6.8.0-1017.18UBUNTU-CVE-2024-44942
Ubuntu:22.04:LTSlinux-xilinx-zynqmp5.15.0-1039.43USN-7166-4
Ubuntu:22.04:LTSlinux-xilinx-zynqmp5.15.0-1039.43UBUNTU-CVE-2024-44942

Affected products (as reported)

VendorProductVersions
Linux Linux 98e4da8ca301e062d79ae168c67e56f3c3de3ce4 – before 54a8da38b70553b61e2265ee0f26d034349dde2598e4da8ca301e062d79ae168c67e56f3c3de3ce4 – before ae00e6536a2dd54b64b39e9a39548870cf83574598e4da8ca301e062d79ae168c67e56f3c3de3ce4 – before 26c07775fb5dc74351d1c3a2bc3cdf609b03e49f98e4da8ca301e062d79ae168c67e56f3c3de3ce4 – before fc01008c92f40015aeeced94750855a7111b6929
Linux Linux 3.8

References