CVE-2020-25212
published 2020-09-09CVE-2020-25212: A TOCTOU mismatch in the NFS client code in the Linux kernel before 5.8.3 could be used by local attackers to corrupt memory or possibly have unspecified other…
PriorityP428high7CVSS 3.1
AVLACHPRLUINSUCHIHAH
EPSS
0.27%
19.4th percentile
A TOCTOU mismatch in the NFS client code in the Linux kernel before 5.8.3 could be used by local attackers to corrupt memory or possibly have unspecified other impact because a size check is in fs/nfs/nfs4proc.c instead of fs/nfs/nfs4xdr.c, aka CID-b4487b935452.
Affected
18 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| canonical | ubuntu_linux | — | — |
| canonical | ubuntu_linux | — | — |
| canonical | ubuntu_linux | — | — |
| canonical | ubuntu_linux | — | — |
| debian | debian_linux | — | — |
| debian | linux | < linux 5.7.17-1 (bookworm) | linux 5.7.17-1 (bookworm) |
| linux | linux_kernel | < 5.8.3 | 5.8.3 |
| linux | linux_kernel | >= 0 < 5.7.17-1 | 5.7.17-1 |
| linux | linux_kernel | >= 0 < 5.7.17-1 | 5.7.17-1 |
| linux | linux_kernel | >= 0 < 5.7.17-1 | 5.7.17-1 |
| linux | linux_kernel | >= 0 < 5.7.17-1 | 5.7.17-1 |
| linux | linux_kernel | >= 0 < 4.4.0-190.220 | 4.4.0-190.220 |
| linux | linux_kernel | >= 0 < 4.15.0-121.123 | 4.15.0-121.123 |
| linux | linux_kernel | >= 0 < 5.4.0-48.52 | 5.4.0-48.52 |
| msrc | cm1_kernel_5.4.91-3_on_cbl_mariner_1.0 | — | — |
| opensuse | leap | — | — |
| opensuse | leap | — | — |
| paloalto | pan-os | — | — |
CVSS provenance
nvdv3.17.0HIGHCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
nvdv2.04.4MEDIUMAV:L/AC:M/Au:N/C:P/I:P/A:P
osv7.0HIGH
vendor_debian7.0HIGH
vendor_msrc7.0HIGH
vendor_redhat7.0HIGH
vendor_ubuntu5.5MEDIUM
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Palo Alto
PAN-SA-2024-0001 Informational Bulletin: Impact of OSS CVEs in PAN-OS
vendor_paloalto·2024-02-14·CVSS 9.8
CVE-2017-18342 [CRITICAL] PAN-SA-2024-0001 Informational Bulletin: Impact of OSS CVEs in PAN-OS
PAN-SA-2024-0001 Informational Bulletin: Impact of OSS CVEs in PAN-OS
The Palo Alto Networks Product Security Assurance team has evaluated the following open source software (OSS) CVEs as they relate to PAN-OS software. While PAN-OS software may include the
CVEs: CVE-2017-18342, CVE-2017-8923, CVE-2017-9120, CVE-2019-1551, CVE-2019-16865, CVE-2019-16905, CVE-2019-19523, CVE-2019-19528, CVE-2019-19911, CVE-2020-0404, CVE-2020-0431, CVE-2020-0466, CVE-2020-10379, CVE-2020-11538, CVE-2020-11608, CVE-2020-12114, CVE-2020-12321, CVE-2020-12362, CVE-2020-12363, CVE-2020-12364, CVE-2020-13757, CVE-2020-14314, CVE-2020-14351, CVE-2020-15778, CVE-2020-1967, CVE-2020-24394, CVE-2020-24504, CVE-2020-25211, CVE-2020-25212, CVE-2020-25284, CVE-2020-25285, CVE-2020-25717, CVE-2020-26541, CVE-2020-2715
Ubuntu
Linux kernel (OEM) vulnerabilities
vendor_ubuntu·2021-02-25·CVSS 5.4
CVE-2020-27152 [MEDIUM] Linux kernel (OEM) vulnerabilities
Title: Linux kernel (OEM) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Daniele Antonioli, Nils Ole Tippenhauer, and Kasper Rasmussen discovered
that legacy pairing and secure-connections pairing authentication in the
Bluetooth protocol could allow an unauthenticated user to complete
authentication without pairing credentials via adjacent access. A
physically proximate attacker could use this to impersonate a previously
paired Bluetooth device. (CVE-2020-10135)
Jay Shin discovered that the ext4 file system implementation in the Linux
kernel did not properly handle directory access with broken indexing,
leading to an out-of-bounds read vulnerability. A local attacker could use
this to cause a denial of service (system crash). (CVE-2020-14314)
It was di
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2020-10-14·CVSS 5.5
CVE-2020-26088 [MEDIUM] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Hadar Manor discovered that the DCCP protocol implementation in the Linux
kernel improperly handled socket reuse, leading to a use-after-free
vulnerability. A local attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2020-16119)
Wen Xu discovered that the XFS file system in the Linux kernel did not
properly validate inode metadata in some situations. An attacker could use
this to construct a malicious XFS image that, when mounted, could cause a
denial of service (system crash). (CVE-2018-10322)
It was discovered that the btrfs file system in the Linux kernel contained
a use-after-free vulnerability when merging free space. An atta
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2020-09-24·CVSS 4.7
CVE-2019-19054 [MEDIUM] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
It was discovered that the Conexant 23885 TV card device driver for the
Linux kernel did not properly deallocate memory in some error conditions. A
local attacker could use this to cause a denial of service (memory
exhaustion). (CVE-2019-19054)
It was discovered that the Atheros HTC based wireless driver in the Linux
kernel did not properly deallocate in certain error conditions. A local
attacker could use this to cause a denial of service (memory exhaustion).
(CVE-2019-19073, CVE-2019-19074)
Yue Haibing discovered that the Linux kernel did not properly handle
reference counting in sysfs for network devices in some situations. A local
attacker could possibly use this to cause a denial o
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2020-09-24·CVSS 5.5
CVE-2019-18808 [MEDIUM] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
It was discovered that the AMD Cryptographic Coprocessor device driver in
the Linux kernel did not properly deallocate memory in some situations. A
local attacker could use this to cause a denial of service (memory
exhaustion). (CVE-2019-18808)
It was discovered that the Conexant 23885 TV card device driver for the
Linux kernel did not properly deallocate memory in some error conditions. A
local attacker could use this to cause a denial of service (memory
exhaustion). (CVE-2019-19054)
It was discovered that the VFIO PCI driver in the Linux kernel did not
properly handle attempts to access disabled memory spaces. A local attacker
could use this to cause a denial of service (system crash)
Red Hat
kernel: TOCTOU mismatch in the NFS client code
vendor_redhat·2020-09-09·CVSS 7.0
CVE-2020-25212 [HIGH] CWE-367 kernel: TOCTOU mismatch in the NFS client code
kernel: TOCTOU mismatch in the NFS client code
A TOCTOU mismatch in the NFS client code in the Linux kernel before 5.8.3 could be used by local attackers to corrupt memory or possibly have unspecified other impact because a size check is in fs/nfs/nfs4proc.c instead of fs/nfs/nfs4xdr.c, aka CID-b4487b935452.
A flaw was found in the NFSv4 implementation where when mounting a remote attacker controlled server it could return specially crafted response allow for local memory corruption and possibly privilege escalation.
Mitigation: While there is no known mitigation to this flaw, configuring authentication and only mounting authenticated NFSv4 servers will significantly reduce the risk of this flaw being successfully exploited.
Package: kernel (Red Hat Enterprise Linux 5) - Out of support
Microsoft
A TOCTOU mismatch in the NFS client code in the Linux kernel before 5.8.3 could be used by local attackers to corrupt memory or possibly have unspecified other impact because a size check is in fs/nfs
vendor_msrc·2020-09-08·CVSS 7.0
CVE-2020-25212 [HIGH] CWE-787 A TOCTOU mismatch in the NFS client code in the Linux kernel before 5.8.3 could be used by local attackers to corrupt memory or possibly have unspecified other impact because a size check is in fs/nfs
A TOCTOU mismatch in the NFS client code in the Linux kernel before 5.8.3 could be used by local attackers to corrupt memory or possibly have unspecified other impact because a size check is in fs/nfs/nfs4proc.c instead of fs/nfs/nfs4xdr.c aka CID-b4487b935452.
FAQ: Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability?
One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure versions of the open source libraries with which the distro is composed. Microsoft is committed to transparency in this work which is why we began publishing CSAF/VEX in October 2025. See this blog post for more information. If im
Debian
CVE-2020-25212: linux - A TOCTOU mismatch in the NFS client code in the Linux kernel before 5.8.3 could ...
vendor_debian·2020·CVSS 7.0
CVE-2020-25212 [HIGH] CVE-2020-25212: linux - A TOCTOU mismatch in the NFS client code in the Linux kernel before 5.8.3 could ...
A TOCTOU mismatch in the NFS client code in the Linux kernel before 5.8.3 could be used by local attackers to corrupt memory or possibly have unspecified other impact because a size check is in fs/nfs/nfs4proc.c instead of fs/nfs/nfs4xdr.c, aka CID-b4487b935452.
Scope: local
bookworm: resolved (fixed in 5.7.17-1)
bullseye: resolved (fixed in 5.7.17-1)
forky: resolved (fixed in 5.7.17-1)
sid: resolved (fixed in 5.7.17-1)
trixie: resolved (fixed in 5.7.17-1)
GHSA
GHSA-w56x-hj26-mq65: A TOCTOU mismatch in the NFS client code in the Linux kernel before 5
ghsa_unreviewed·2022-05-24
CVE-2020-25212 [MEDIUM] CWE-367 GHSA-w56x-hj26-mq65: A TOCTOU mismatch in the NFS client code in the Linux kernel before 5
A TOCTOU mismatch in the NFS client code in the Linux kernel before 5.8.3 could be used by local attackers to corrupt memory or possibly have unspecified other impact because a size check is in fs/nfs/nfs4proc.c instead of fs/nfs/nfs4xdr.c, aka CID-b4487b935452.
OSV
linux-oem-5.6 vulnerabilities
osv·2021-02-25·CVSS 5.4
CVE-2020-10135 [MEDIUM] linux-oem-5.6 vulnerabilities
linux-oem-5.6 vulnerabilities
Daniele Antonioli, Nils Ole Tippenhauer, and Kasper Rasmussen discovered
that legacy pairing and secure-connections pairing authentication in the
Bluetooth protocol could allow an unauthenticated user to complete
authentication without pairing credentials via adjacent access. A
physically proximate attacker could use this to impersonate a previously
paired Bluetooth device. (CVE-2020-10135)
Jay Shin discovered that the ext4 file system implementation in the Linux
kernel did not properly handle directory access with broken indexing,
leading to an out-of-bounds read vulnerability. A local attacker could use
this to cause a denial of service (system crash). (CVE-2020-14314)
It was discovered that the block layer implementation in the Linux kernel
did not prope
OSV
linux, linux-aws, linux-aws-hwe, linux-azure, linux-azure-4.15, linux-gcp, linux-gcp-4.15, linux-gke-4.15, linux-hwe, linux-kvm, linux-oem, linux-oracle, linux-raspi2, linux-snapdragon vulnerabilities
osv·2020-10-14·CVSS 5.5
CVE-2020-16119 [MEDIUM] linux, linux-aws, linux-aws-hwe, linux-azure, linux-azure-4.15, linux-gcp, linux-gcp-4.15, linux-gke-4.15, linux-hwe, linux-kvm, linux-oem, linux-oracle, linux-raspi2, linux-snapdragon vulnerabilities
linux, linux-aws, linux-aws-hwe, linux-azure, linux-azure-4.15, linux-gcp, linux-gcp-4.15, linux-gke-4.15, linux-hwe, linux-kvm, linux-oem, linux-oracle, linux-raspi2, linux-snapdragon vulnerabilities
Hadar Manor discovered that the DCCP protocol implementation in the Linux
kernel improperly handled socket reuse, leading to a use-after-free
vulnerability. A local attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2020-16119)
Wen Xu discovered that the XFS file system in the Linux kernel did not
properly validate inode metadata in some situations. An attacker could use
this to construct a malicious XFS image that, when mounted, could cause a
denial of service (system crash). (CVE-2018-10322)
It was discovered that the btrfs file s
OSV
linux, linux-aws, linux-aws-5.4, linux-azure, linux-azure-5.4, linux-gcp, linux-gcp-5.4, linux-hwe-5.4, linux-kvm, linux-oracle, linux-oracle-5.4, linux-raspi, linux-raspi-5.4 vulnerabilities
osv·2020-09-24·CVSS 5.5
CVE-2019-18808 [MEDIUM] linux, linux-aws, linux-aws-5.4, linux-azure, linux-azure-5.4, linux-gcp, linux-gcp-5.4, linux-hwe-5.4, linux-kvm, linux-oracle, linux-oracle-5.4, linux-raspi, linux-raspi-5.4 vulnerabilities
linux, linux-aws, linux-aws-5.4, linux-azure, linux-azure-5.4, linux-gcp, linux-gcp-5.4, linux-hwe-5.4, linux-kvm, linux-oracle, linux-oracle-5.4, linux-raspi, linux-raspi-5.4 vulnerabilities
It was discovered that the AMD Cryptographic Coprocessor device driver in
the Linux kernel did not properly deallocate memory in some situations. A
local attacker could use this to cause a denial of service (memory
exhaustion). (CVE-2019-18808)
It was discovered that the Conexant 23885 TV card device driver for the
Linux kernel did not properly deallocate memory in some error conditions. A
local attacker could use this to cause a denial of service (memory
exhaustion). (CVE-2019-19054)
It was discovered that the VFIO PCI driver in the Linux kernel did not
properly handle attempts to access disabled
OSV
linux, linux-aws, linux-kvm, linux-lts-xenial, linux-raspi2, linux-snapdragon vulnerabilities
osv·2020-09-24·CVSS 4.7
CVE-2019-19054 [MEDIUM] linux, linux-aws, linux-kvm, linux-lts-xenial, linux-raspi2, linux-snapdragon vulnerabilities
linux, linux-aws, linux-kvm, linux-lts-xenial, linux-raspi2, linux-snapdragon vulnerabilities
It was discovered that the Conexant 23885 TV card device driver for the
Linux kernel did not properly deallocate memory in some error conditions. A
local attacker could use this to cause a denial of service (memory
exhaustion). (CVE-2019-19054)
It was discovered that the Atheros HTC based wireless driver in the Linux
kernel did not properly deallocate in certain error conditions. A local
attacker could use this to cause a denial of service (memory exhaustion).
(CVE-2019-19073, CVE-2019-19074)
Yue Haibing discovered that the Linux kernel did not properly handle
reference counting in sysfs for network devices in some situations. A local
attacker could possibly use this to cause a denial of servic
OSV
CVE-2020-25212: A TOCTOU mismatch in the NFS client code in the Linux kernel before 5
osv·2020-09-09·CVSS 7.0
CVE-2020-25212 [HIGH] CVE-2020-25212: A TOCTOU mismatch in the NFS client code in the Linux kernel before 5
A TOCTOU mismatch in the NFS client code in the Linux kernel before 5.8.3 could be used by local attackers to corrupt memory or possibly have unspecified other impact because a size check is in fs/nfs/nfs4proc.c instead of fs/nfs/nfs4xdr.c, aka CID-b4487b935452.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2020-25212 kernel: TOCTOU mismatch in the NFS client code
bugzilla·2020-09-09·CVSS 7.0
CVE-2020-25212 [HIGH] CVE-2020-25212 kernel: TOCTOU mismatch in the NFS client code
CVE-2020-25212 kernel: TOCTOU mismatch in the NFS client code
A TOCTOU mismatch in the NFS client code in the Linux kernel before 5.8.3 could be used by local attackers to corrupt memory or possibly have unspecified other impact because a size check is in fs/nfs/nfs4proc.c instead of fs/nfs/nfs4xdr.c.
References:
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.8.3
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b4487b93545214a9db8cbf32e86411677b0cca21
https://twitter.com/grsecurity/status/1303370421958578179
Discussion:
Created kernel tracking bugs for this issue:
Affects: fedora-all [bug 1877576]
---
This was fixed for Fedora with the 5.8 stable rebases.
---
Mitigation:
While there is no known mitigation to this flaw, configuring authentic
Bugzilla
CVE-2020-25212 kernel: TOCTOU mismatch in the NFS client code [fedora-all]
bugzilla·2020-09-09·CVSS 7.0
CVE-2020-25212 [HIGH] CVE-2020-25212 kernel: TOCTOU mismatch in the NFS client code [fedora-all]
CVE-2020-25212 kernel: TOCTOU mismatch in the NFS client code [fedora-all]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of fedora-all.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When submitting as an update, use the fedpkg template provided in the next
comment(s). This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
fedpkg commit message.
NOTE: this issue affects multiple supported versions of
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00021.htmlhttp://lists.opensuse.org/opensuse-security-announce/2020-10/msg00035.htmlhttp://lists.opensuse.org/opensuse-security-announce/2020-10/msg00042.htmlhttps://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.8.3https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b4487b93545214a9db8cbf32e86411677b0cca21https://lists.debian.org/debian-lts-announce/2020/09/msg00025.htmlhttps://lists.debian.org/debian-lts-announce/2020/10/msg00032.htmlhttps://lists.debian.org/debian-lts-announce/2020/10/msg00034.htmlhttps://twitter.com/grsecurity/status/1303370421958578179https://usn.ubuntu.com/4525-1/https://usn.ubuntu.com/4527-1/https://usn.ubuntu.com/4578-1/http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00021.htmlhttp://lists.opensuse.org/opensuse-security-announce/2020-10/msg00035.htmlhttp://lists.opensuse.org/opensuse-security-announce/2020-10/msg00042.htmlhttps://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.8.3https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b4487b93545214a9db8cbf32e86411677b0cca21https://lists.debian.org/debian-lts-announce/2020/09/msg00025.htmlhttps://lists.debian.org/debian-lts-announce/2020/10/msg00032.htmlhttps://lists.debian.org/debian-lts-announce/2020/10/msg00034.htmlhttps://twitter.com/grsecurity/status/1303370421958578179https://usn.ubuntu.com/4525-1/https://usn.ubuntu.com/4527-1/https://usn.ubuntu.com/4578-1/
2020-09-09
Published