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CVE-2022-50456— btrfs: fix resolving backrefs for inline extent followed by prealloc

EPSS 0.02% · P6
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I. Basic Information for CVE-2022-50456

Vulnerability Information
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Vulnerability Title
btrfs: fix resolving backrefs for inline extent followed by prealloc
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: btrfs: fix resolving backrefs for inline extent followed by prealloc If a file consists of an inline extent followed by a regular or prealloc extent, then a legitimate attempt to resolve a logical address in the non-inline region will result in add_all_parents reading the invalid offset field of the inline extent. If the inline extent item is placed in the leaf eb s.t. it is the first item, attempting to access the offset field will not only be meaningless, it will go past the end of the eb and cause this panic: [17.626048] BTRFS warning (device dm-2): bad eb member end: ptr 0x3fd4 start 30834688 member offset 16377 size 8 [17.631693] general protection fault, probably for non-canonical address 0x5088000000000: 0000 [#1] SMP PTI [17.635041] CPU: 2 PID: 1267 Comm: btrfs Not tainted 5.12.0-07246-g75175d5adc74-dirty #199 [17.637969] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014 [17.641995] RIP: 0010:btrfs_get_64+0xe7/0x110 [17.649890] RSP: 0018:ffffc90001f73a08 EFLAGS: 00010202 [17.651652] RAX: 0000000000000001 RBX: ffff88810c42d000 RCX: 0000000000000000 [17.653921] RDX: 0005088000000000 RSI: ffffc90001f73a0f RDI: 0000000000000001 [17.656174] RBP: 0000000000000ff9 R08: 0000000000000007 R09: c0000000fffeffff [17.658441] R10: ffffc90001f73790 R11: ffffc90001f73788 R12: ffff888106afe918 [17.661070] R13: 0000000000003fd4 R14: 0000000000003f6f R15: cdcdcdcdcdcdcdcd [17.663617] FS: 00007f64e7627d80(0000) GS:ffff888237c80000(0000) knlGS:0000000000000000 [17.666525] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [17.668664] CR2: 000055d4a39152e8 CR3: 000000010c596002 CR4: 0000000000770ee0 [17.671253] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [17.673634] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [17.676034] PKRU: 55555554 [17.677004] Call Trace: [17.677877] add_all_parents+0x276/0x480 [17.679325] find_parent_nodes+0xfae/0x1590 [17.680771] btrfs_find_all_leafs+0x5e/0xa0 [17.682217] iterate_extent_inodes+0xce/0x260 [17.683809] ? btrfs_inode_flags_to_xflags+0x50/0x50 [17.685597] ? iterate_inodes_from_logical+0xa1/0xd0 [17.687404] iterate_inodes_from_logical+0xa1/0xd0 [17.689121] ? btrfs_inode_flags_to_xflags+0x50/0x50 [17.691010] btrfs_ioctl_logical_to_ino+0x131/0x190 [17.692946] btrfs_ioctl+0x104a/0x2f60 [17.694384] ? selinux_file_ioctl+0x182/0x220 [17.695995] ? __x64_sys_ioctl+0x84/0xc0 [17.697394] __x64_sys_ioctl+0x84/0xc0 [17.698697] do_syscall_64+0x33/0x40 [17.700017] entry_SYSCALL_64_after_hwframe+0x44/0xae [17.701753] RIP: 0033:0x7f64e72761b7 [17.709355] RSP: 002b:00007ffefb067f58 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [17.712088] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f64e72761b7 [17.714667] RDX: 00007ffefb067fb0 RSI: 00000000c0389424 RDI: 0000000000000003 [17.717386] RBP: 00007ffefb06d188 R08: 000055d4a390d2b0 R09: 00007f64e7340a60 [17.719938] R10: 0000000000000231 R11: 0000000000000246 R12: 0000000000000001 [17.722383] R13: 0000000000000000 R14: 00000000c0389424 R15: 000055d4a38fd2a0 [17.724839] Modules linked in: Fix the bug by detecting the inline extent item in add_all_parents and skipping to the next extent item.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
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，该漏洞源于解析内联扩展后跟预分配扩展的反向引用时访问无效偏移字段，可能导致越界读取和系统崩溃。
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 8da6d5815c592b713ecaf4f4f8b631f8359c96c4 ~ c59ee1528b3432ec9dca220567f7eb507820917a -
LinuxLinux 3.3 -

II. Public POCs for CVE-2022-50456

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III. Intelligence Information for CVE-2022-50456

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Same Patch Batch · Linux · 2025-10-01 · 169 CVEs total

CVE-2022-50462MIPS: vpe-mt: fix possible memory leak while module exiting
CVE-2022-50448mm/uffd: fix warning without PTE_MARKER_UFFD_WP compiled in
CVE-2022-50452net: sched: cake: fix null pointer access issue when cake_init() fails
CVE-2022-50451fs/ntfs3: Fix memory leak on ntfs_fill_super() error path
CVE-2022-50453gpiolib: cdev: fix NULL-pointer dereferences
CVE-2022-50454drm/nouveau: fix a use-after-free in nouveau_gem_prime_import_sg_table()
CVE-2022-50457mtd: core: Fix refcount error in del_mtd_device()
CVE-2022-50458clk: tegra: Fix refcount leak in tegra210_clock_init
CVE-2022-50460cifs: Fix xid leak in cifs_flock()
CVE-2022-50459scsi: iscsi: iscsi_tcp: Fix null-ptr-deref while calling getpeername()
CVE-2022-50461net: ethernet: ti: am65-cpsw: Fix PM runtime leakage in am65_cpsw_nuss_ndo_slave_open()
CVE-2022-50467scsi: lpfc: Fix null ndlp ptr dereference in abnormal exit path for GFT_ID
CVE-2023-53488IB/hfi1: Fix possible panic during hotplug remove
CVE-2023-53489tcp/udp: Fix memleaks of sk and zerocopy skbs with TX timestamp.
CVE-2022-50469staging: rtl8723bs: fix potential memory leak in rtw_init_drv_sw()
CVE-2022-50468platform/chrome: cros_usbpd_notify: Fix error handling in cros_usbpd_notify_init()
CVE-2022-50465ext4: fix leaking uninitialized memory in fast-commit journal
CVE-2022-50463powerpc/52xx: Fix a resource leak in an error handling path
CVE-2022-50464mt76: mt7915: Fix PCI device refcount leak in mt7915_pci_init_hif2()
CVE-2022-50449clk: samsung: Fix memory leak in _samsung_clk_register_pll()

Showing top 20 of 169 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2022-50456

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