CVE-2021-47107 — Classic Buffer Overflow in Linux

Vendor	Product	Version range	Fixed in
debian	linux	< linux 5.15.15-1 (bookworm)	linux 5.15.15-1 (bookworm)
linux	linux	—	—
linux	linux	>= 37aa5e64022243e721b8334122997881177a4cfc < 9e291a6a28d32545ed2fd959a8165144d1724df1	9e291a6a28d32545ed2fd959a8165144d1724df1
linux	linux	>= 7f87fc2d34d475225e78b7f5c4eabb121f4282b2 < eabc0aab98e5218ceecd82069b0d6fdfff5ee885	eabc0aab98e5218ceecd82069b0d6fdfff5ee885
linux	linux	>= 7f87fc2d34d475225e78b7f5c4eabb121f4282b2 < 53b1119a6e5028b125f431a0116ba73510d82a72	53b1119a6e5028b125f431a0116ba73510d82a72
linux	linux_kernel	—	—
linux	linux_kernel	>= 0 < 5.15.15-1	5.15.15-1
linux	linux_kernel	>= 0 < 5.15.15-1	5.15.15-1
linux	linux_kernel	>= 0 < 5.15.15-1	5.15.15-1
linux	linux_kernel	>= 5.13 < 5.15.12	5.15.12

Red Hat

kernel: NFSD: Fix READDIR buffer overflow

vendor_redhat·2024-03-04·CVSS 7.8

CVE-2021-47107 [HIGH] CWE-121 kernel: NFSD: Fix READDIR buffer overflow kernel: NFSD: Fix READDIR buffer overflow In the Linux kernel, the following vulnerability has been resolved: NFSD: Fix READDIR buffer overflow If a client sends a READDIR count argument that is too small (say, zero), then the buffer size calculation in the new init_dirlist helper functions results in an underflow, allowing the XDR stream functions to write beyond the actual buffer. This calculation has always been suspect. NFSD has never sanity- checked the READDIR count argument, but the old entry encoders managed the problem correctly. With the commits below, entry encoding changed, exposing the underflow to the pointer arithmetic in xdr_reserve_space(). Modern NFS clients attempt to retrieve as much data as possible for each READDIR request. Also, we have no unit tests that exercise t

Debian

CVE-2021-47107: linux - In the Linux kernel, the following vulnerability has been resolved: NFSD: Fix R...

vendor_debian·2021·CVSS 7.8

CVE-2021-47107 [HIGH] CVE-2021-47107: linux - In the Linux kernel, the following vulnerability has been resolved: NFSD: Fix R... In the Linux kernel, the following vulnerability has been resolved: NFSD: Fix READDIR buffer overflow If a client sends a READDIR count argument that is too small (say, zero), then the buffer size calculation in the new init_dirlist helper functions results in an underflow, allowing the XDR stream functions to write beyond the actual buffer. This calculation has always been suspect. NFSD has never sanity- checked the READDIR count argument, but the old entry encoders managed the problem correctly. With the commits below, entry encoding changed, exposing the underflow to the pointer arithmetic in xdr_reserve_space(). Modern NFS clients attempt to retrieve as much data as possible for each READDIR request. Also, we have no unit tests that exercise the behavior of READDIR at the lower bound o

OSV

CVE-2021-47107: In the Linux kernel, the following vulnerability has been resolved: NFSD: Fix READDIR buffer overflow If a client sends a READDIR count argument that

osv·2024-03-04·CVSS 7.8

CVE-2021-47107 [HIGH] CVE-2021-47107: In the Linux kernel, the following vulnerability has been resolved: NFSD: Fix READDIR buffer overflow If a client sends a READDIR count argument that In the Linux kernel, the following vulnerability has been resolved: NFSD: Fix READDIR buffer overflow If a client sends a READDIR count argument that is too small (say, zero), then the buffer size calculation in the new init_dirlist helper functions results in an underflow, allowing the XDR stream functions to write beyond the actual buffer. This calculation has always been suspect. NFSD has never sanity- checked the READDIR count argument, but the old entry encoders managed the problem correctly. With the commits below, entry encoding changed, exposing the underflow to the pointer arithmetic in xdr_reserve_space(). Modern NFS clients attempt to retrieve as much data as possible for each READDIR request. Also, we have no unit tests that exercise the behavior of READDIR at the lower bound o

GHSA

GHSA-2mfm-m7q3-xch8: In the Linux kernel, the following vulnerability has been resolved: NFSD: Fix READDIR buffer overflow If a client sends a READDIR count argument tha

ghsa_unreviewed·2024-03-04

CVE-2021-47107 [HIGH] CWE-120 GHSA-2mfm-m7q3-xch8: In the Linux kernel, the following vulnerability has been resolved: NFSD: Fix READDIR buffer overflow If a client sends a READDIR count argument tha In the Linux kernel, the following vulnerability has been resolved: NFSD: Fix READDIR buffer overflow If a client sends a READDIR count argument that is too small (say, zero), then the buffer size calculation in the new init_dirlist helper functions results in an underflow, allowing the XDR stream functions to write beyond the actual buffer. This calculation has always been suspect. NFSD has never sanity- checked the READDIR count argument, but the old entry encoders managed the problem correctly. With the commits below, entry encoding changed, exposing the underflow to the pointer arithmetic in xdr_reserve_space(). Modern NFS clients attempt to retrieve as much data as possible for each READDIR request. Also, we have no unit tests that exercise the behavior of READDIR at the lower bo

CVE-2021-47107: In the Linux kernel, the following vulnerability has been resolved: NFSD: Fix READDIR buffer overflow If a client sends a READDIR count argument that is too…

Affected

CVSS provenance