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CVE-2024-26870— NFSv4.2: fix nfs4_listxattr kernel BUG at mm/usercopy.c:102

EPSS 0.03% · P7
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I. Basic Information for CVE-2024-26870

Vulnerability Information
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Vulnerability Title
NFSv4.2: fix nfs4_listxattr kernel BUG at mm/usercopy.c:102
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: NFSv4.2: fix nfs4_listxattr kernel BUG at mm/usercopy.c:102 A call to listxattr() with a buffer size = 0 returns the actual size of the buffer needed for a subsequent call. When size > 0, nfs4_listxattr() does not return an error because either generic_listxattr() or nfs4_listxattr_nfs4_label() consumes exactly all the bytes then size is 0 when calling nfs4_listxattr_nfs4_user() which then triggers the following kernel BUG: [ 99.403778] kernel BUG at mm/usercopy.c:102! [ 99.404063] Internal error: Oops - BUG: 00000000f2000800 [#1] SMP [ 99.408463] CPU: 0 PID: 3310 Comm: python3 Not tainted 6.6.0-61.fc40.aarch64 #1 [ 99.415827] Call trace: [ 99.415985] usercopy_abort+0x70/0xa0 [ 99.416227] __check_heap_object+0x134/0x158 [ 99.416505] check_heap_object+0x150/0x188 [ 99.416696] __check_object_size.part.0+0x78/0x168 [ 99.416886] __check_object_size+0x28/0x40 [ 99.417078] listxattr+0x8c/0x120 [ 99.417252] path_listxattr+0x78/0xe0 [ 99.417476] __arm64_sys_listxattr+0x28/0x40 [ 99.417723] invoke_syscall+0x78/0x100 [ 99.417929] el0_svc_common.constprop.0+0x48/0xf0 [ 99.418186] do_el0_svc+0x24/0x38 [ 99.418376] el0_svc+0x3c/0x110 [ 99.418554] el0t_64_sync_handler+0x120/0x130 [ 99.418788] el0t_64_sync+0x194/0x198 [ 99.418994] Code: aa0003e3 d000a3e0 91310000 97f49bdb (d4210000) Issue is reproduced when generic_listxattr() returns 'system.nfs4_acl', thus calling lisxattr() with size = 16 will trigger the bug. Add check on nfs4_listxattr() to return ERANGE error when it is called with size > 0 and the return value is greater than size.
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，该漏洞源于当 size > 0 时，generic_listxattr() 或 nfs4_listxattr_nfs4_label() 会消耗所有字节。
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 012a211abd5db098094ce429de5f046368391e68 ~ 4403438eaca6e91f02d272211c4d6b045092396b -
LinuxLinux 5.9 -

II. Public POCs for CVE-2024-26870

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III. Intelligence Information for CVE-2024-26870

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Same Patch Batch · Linux · 2024-04-17 · 100 CVEs total

CVE-2024-26884bpf: Fix hashtab overflow check on 32-bit arches
CVE-2024-26878quota: Fix potential NULL pointer dereference
CVE-2024-26874drm/mediatek: Fix a null pointer crash in mtk_drm_crtc_finish_page_flip
CVE-2024-26873scsi: hisi_sas: Fix a deadlock issue related to automatic dump
CVE-2024-26872RDMA/srpt: Do not register event handler until srpt device is fully setup
CVE-2024-26871f2fs: fix NULL pointer dereference in f2fs_submit_page_write()
CVE-2024-26869f2fs: fix to truncate meta inode pages forcely
CVE-2024-26875media: pvrusb2: fix uaf in pvr2_context_set_notify
CVE-2024-26882net: ip_tunnel: make sure to pull inner header in ip_tunnel_rcv()
CVE-2024-26883bpf: Fix stackmap overflow check on 32-bit arches
CVE-2024-26881net: hns3: fix kernel crash when 1588 is received on HIP08 devices
CVE-2024-26885bpf: Fix DEVMAP_HASH overflow check on 32-bit arches
CVE-2024-26886Bluetooth: af_bluetooth: Fix deadlock
CVE-2024-26887Bluetooth: btusb: Fix memory leak
CVE-2024-26888Bluetooth: msft: Fix memory leak
CVE-2024-26889Bluetooth: hci_core: Fix possible buffer overflow
CVE-2024-26890Bluetooth: btrtl: fix out of bounds memory access
CVE-2024-26891iommu/vt-d: Don't issue ATS Invalidation request when device is disconnected
CVE-2024-26892wifi: mt76: mt7921e: fix use-after-free in free_irq()
CVE-2024-26893firmware: arm_scmi: Fix double free in SMC transport cleanup path

Showing top 20 of 100 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

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