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CVE-2024-26844— block: Fix WARNING in _copy_from_iter

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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syzcaller 设法生成传输方向为 SG_DXFER_TO_FROM_DEV 的请求，意思是会将用户缓冲区复制到内核中，读入复制的缓冲区，然后将数据复制回用户空间。

AI Predicted 5.5 Difficulty: Easy EPSS 0.22% · P12

Affected Version Matrix 10

VendorProduct Version RangeStatus
Linux Linux 9124d3fe21b0947b03f4b87bcfb7acd675d6e85b< 8fc80874103a5c20aebdc2401361aa01c817f75b affected
9124d3fe21b0947b03f4b87bcfb7acd675d6e85b< 0f1bae071de9967602807472921829a54b2e5956 affected
9124d3fe21b0947b03f4b87bcfb7acd675d6e85b< cbaf9be337f7da25742acfce325119e3395b1f1b affected
9124d3fe21b0947b03f4b87bcfb7acd675d6e85b< 13f3956eb5681a4045a8dfdef48df5dc4d9f58a6 affected
4.0 affected
< 4.0 unaffected
6.1.80≤ 6.1.* unaffected
6.6.19≤ 6.6.* unaffected
… +2 more rows
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I. Basic Information for CVE-2024-26844

Vulnerability Information
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Vulnerability Title
block: Fix WARNING in _copy_from_iter
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: block: Fix WARNING in _copy_from_iter Syzkaller reports a warning in _copy_from_iter because an iov_iter is supposedly used in the wrong direction. The reason is that syzcaller managed to generate a request with a transfer direction of SG_DXFER_TO_FROM_DEV. This instructs the kernel to copy user buffers into the kernel, read into the copied buffers and then copy the data back to user space. Thus the iovec is used in both directions. Detect this situation in the block layer and construct a new iterator with the correct direction for the copy-in.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
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syzcaller 设法生成传输方向为 SG_DXFER_TO_FROM_DEV 的请求，意思是会将用户缓冲区复制到内核中，读入复制的缓冲区，然后将数据复制回用户空间。
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

Vendor Product Affected Versions CPE Subscribe
Linux Linux 9124d3fe21b0947b03f4b87bcfb7acd675d6e85b ~ 8fc80874103a5c20aebdc2401361aa01c817f75b -
Linux Linux 4.0 -

II. Public POCs for CVE-2024-26844

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III. Intelligence Information for CVE-2024-26844

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Other References for CVE-2024-26844 (4)

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

CVE-2024-26853 9.8 CRITICAL igc: avoid returning frame twice in XDP_REDIRECT
CVE-2024-26877 9.8 CRITICAL crypto: xilinx - call finalize with bh disabled
CVE-2024-26828 9.4 CRITICAL cifs: fix underflow in parse_server_interfaces()
CVE-2024-26856 8.8 HIGH net: sparx5: Fix use after free inside sparx5_del_mact_entry
CVE-2024-26822 8.7 HIGH smb: client: set correct id, uid and cruid for multiuser automounts
CVE-2024-26830 8.4 HIGH i40e: Do not allow untrusted VF to remove administratively set MAC
CVE-2024-26883 7.8 HIGH bpf: Fix stackmap overflow check on 32-bit arches
CVE-2024-26872 7.8 HIGH RDMA/srpt: Do not register event handler until srpt device is fully setup
CVE-2024-26824 7.8 HIGH crypto: algif_hash - Remove bogus SGL free on zero-length error path
CVE-2024-26870 7.8 HIGH NFSv4.2: fix nfs4_listxattr kernel BUG at mm/usercopy.c:102
CVE-2024-26823 7.8 HIGH irqchip/gic-v3-its: Restore quirk probing for ACPI-based systems
CVE-2024-26869 7.8 HIGH f2fs: fix to truncate meta inode pages forcely
CVE-2024-26911 7.8 HIGH drm/buddy: Fix alloc_range() error handling code
CVE-2024-26838 7.8 HIGH RDMA/irdma: Fix KASAN issue with tasklet
CVE-2024-26865 7.8 HIGH rds: tcp: Fix use-after-free of net in reqsk_timer_handler().
CVE-2024-26864 7.8 HIGH tcp: Fix refcnt handling in __inet_hash_connect().
CVE-2024-26890 7.8 HIGH Bluetooth: btrtl: fix out of bounds memory access
CVE-2024-26895 7.8 HIGH wifi: wilc1000: prevent use-after-free on vif when cleaning up all interfaces
CVE-2024-26898 7.8 HIGH aoe: fix the potential use-after-free problem in aoecmd_cfg_pkts
CVE-2024-26852 7.8 HIGH net/ipv6: avoid possible UAF in ip6_route_mpath_notify()

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

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-26844

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