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CVE-2024-56740— nfs/localio: must clear res.replen in nfs_local_read_done

EPSS 0.04% · P12

Affected Version Matrix 6

VendorProductVersion RangeStatus
LinuxLinux70ba381e1a431245c137ed597ec6a05991c79bd9< de5dac261eeab99762bbdf7c20cee5d26ef4462eaffected
70ba381e1a431245c137ed597ec6a05991c79bd9< 650703bc4ed3edf841e851c99ab8e7ba9e5262a3affected
6.12affected
< 6.12unaffected
6.12.2≤ 6.12.*unaffected
6.13≤ *unaffected
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I. Basic Information for CVE-2024-56740

Vulnerability Information
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Vulnerability Title
nfs/localio: must clear res.replen in nfs_local_read_done
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: nfs/localio: must clear res.replen in nfs_local_read_done Otherwise memory corruption can occur due to NFSv3 LOCALIO reads leaving garbage in res.replen: - nfs3_read_done() copies that into server->read_hdrsize; from there nfs3_proc_read_setup() copies it to args.replen in new requests. - nfs3_xdr_enc_read3args() passes that to rpc_prepare_reply_pages() which includes it in hdrsize for xdr_init_pages, so that rq_rcv_buf contains a ridiculous len. - This is copied to rq_private_buf and xs_read_stream_request() eventually passes the kvec to sock_recvmsg() which receives incoming data into entirely the wrong place. This is easily reproduced with NFSv3 LOCALIO that is servicing reads when it is made to pivot back to using normal RPC. This switch back to using normal NFSv3 with RPC can occur for a few reasons but this issue was exposed with a test that stops and then restarts the NFSv3 server while LOCALIO is performing heavy read IO.
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nfs/localio子系统中在NFSv3 LOCALIO读取操作中内存损坏问题。
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 70ba381e1a431245c137ed597ec6a05991c79bd9 ~ de5dac261eeab99762bbdf7c20cee5d26ef4462e -
LinuxLinux 6.12 -

II. Public POCs for CVE-2024-56740

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III. Intelligence Information for CVE-2024-56740

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Patches & Fixes for CVE-2024-56740 (2)

Same Patch Batch · Linux · 2024-12-29 · 39 CVEs total

CVE-2024-56747scsi: qedi: Fix a possible memory leak in qedi_alloc_and_init_sb()
CVE-2024-56729smb: Initialize cfid->tcon before performing network ops
CVE-2024-56730net/9p/usbg: fix handling of the failed kzalloc() memory allocation
CVE-2024-56739rtc: check if __rtc_read_time was successful in rtc_timer_do_work()
CVE-2024-56742vfio/mlx5: Fix an unwind issue in mlx5vf_add_migration_pages()
CVE-2024-56743nfs_common: must not hold RCU while calling nfsd_file_put_local
CVE-2024-56745PCI: Fix reset_method_store() memory leak
CVE-2024-56744f2fs: fix to avoid potential deadlock in f2fs_record_stop_reason()
CVE-2024-56746fbdev: sh7760fb: Fix a possible memory leak in sh7760fb_alloc_mem()
CVE-2024-56748scsi: qedf: Fix a possible memory leak in qedf_alloc_and_init_sb()
CVE-2024-56727octeontx2-pf: handle otx2_mbox_get_rsp errors in otx2_flows.c
CVE-2024-56749dlm: fix dlm_recover_members refcount on error
CVE-2024-56750erofs: fix blksize < PAGE_SIZE for file-backed mounts
CVE-2024-56751ipv6: release nexthop on device removal
CVE-2024-56752drm/nouveau/gr/gf100: Fix missing unlock in gf100_gr_chan_new()
CVE-2024-56753drm/amdgpu/gfx9: Add Cleaner Shader Deinitialization in gfx_v9_0 Module
CVE-2024-56754crypto: caam - Fix the pointer passed to caam_qi_shutdown()
CVE-2024-56755netfs/fscache: Add a memory barrier for FSCACHE_VOLUME_CREATING
CVE-2024-56756nvme-pci: fix freeing of the HMB descriptor table
CVE-2024-56719net: stmmac: fix TSO DMA API usage causing oops

Showing top 20 of 39 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-56740

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