CVE-2021-20239
published 2021-05-28CVE-2021-20239: A flaw was found in the Linux kernel in versions before 5.4.92 in the BPF protocol. This flaw allows an attacker with a local account to leak information about…
PriorityP411low3.3CVSS 3.1
AVLACLPRLUINSUCLINAN
EPSS
0.26%
17.1th percentile
A flaw was found in the Linux kernel in versions before 5.4.92 in the BPF protocol. This flaw allows an attacker with a local account to leak information about kernel internal addresses. The highest threat from this vulnerability is to confidentiality.
Affected
13 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 5.10.4-1 (bookworm) | linux 5.10.4-1 (bookworm) |
| fedoraproject | fedora | — | — |
| linux | linux_kernel | < 5.4.92 | 5.4.92 |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 0 < 5.10.4-1 | 5.10.4-1 |
| linux | linux_kernel | >= 0 < 5.10.4-1 | 5.10.4-1 |
| linux | linux_kernel | >= 0 < 5.10.4-1 | 5.10.4-1 |
| linux | linux_kernel | >= 0 < 5.10.4-1 | 5.10.4-1 |
| linux | linux_kernel | >= 0 < 5.4.0-67.75 | 5.4.0-67.75 |
| paloalto | pan-os | — | — |
| redhat | enterprise_linux | — | — |
| redhat | enterprise_linux | — | — |
| redhat | enterprise_linux | — | — |
CVSS provenance
nvdv3.13.3LOWCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
nvdv2.02.1LOWAV:L/AC:L/Au:N/C:P/I:N/A:N
osv6.7MEDIUM
vendor_ubuntu8.8HIGH
vendor_debian3.3LOW
vendor_redhat3.3LOW
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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 vulnerabilities
vendor_ubuntu·2021-04-13·CVSS 3.3
CVE-2021-20268 [LOW] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Ryota Shiga discovered that the sockopt BPF hooks in the Linux kernel could
allow a user space program to probe for valid kernel addresses. A local
attacker could use this to ease exploitation of another kernel
vulnerability. (CVE-2021-20239)
It was discovered that the BPF verifier in the Linux kernel did not
properly handle signed add32 and sub integer overflows. A local attacker
could use this to cause a denial of service (system crash) or possibly
execute arbitrary code. (CVE-2021-20268)
It was discovered that the priority inheritance futex implementation in the
Linux kernel contained a race condition, leading to a use-after-free
vulnerability. A local attacker could use this to caus
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2021-03-16·CVSS 8.8
CVE-2021-3347 [HIGH] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
It was discovered that the Marvell WiFi-Ex device driver in the Linux
kernel did not properly validate ad-hoc SSIDs. A local attacker could use
this to cause a denial of service (system crash) or possibly execute
arbitrary code. (CVE-2020-36158)
Ryota Shiga discovered that the sockopt BPF hooks in the Linux kernel could
allow a user space program to probe for valid kernel addresses. A local
attacker could use this to ease exploitation of another kernel
vulnerability. (CVE-2021-20239)
It was discovered that the priority inheritance futex implementation in the
Linux kernel contained a race condition, leading to a use-after-free
vulnerability. A local attacker could use this to cause a den
Red Hat
kernel: setsockopt System Call Untrusted Pointer Dereference Information Disclosure
vendor_redhat·2021-02-01·CVSS 3.3
CVE-2021-20239 [LOW] CWE-822 kernel: setsockopt System Call Untrusted Pointer Dereference Information Disclosure
kernel: setsockopt System Call Untrusted Pointer Dereference Information Disclosure
A flaw was found in the Linux kernel in versions before 5.4.92 in the BPF protocol. This flaw allows an attacker with a local account to leak information about kernel internal addresses. The highest threat from this vulnerability is to confidentiality.
A flaw was found in the BPF protocol. This flaw allows an attacker with a local account to leak information about kernel internal addresses. The highest threat from this vulnerability is to confidentiality.
Mitigation: Loading a filter is a privileged (CAP_SYS_ADMIN or root) operation. Once any filter is used, this attack is capable of being used by an unprivileged user. There is no known mitigation that product security finds suitable for this flaw.
Pack
Debian
CVE-2021-20239: linux - A flaw was found in the Linux kernel in versions before 5.4.92 in the BPF protoc...
vendor_debian·2021·CVSS 3.3
CVE-2021-20239 [LOW] CVE-2021-20239: linux - A flaw was found in the Linux kernel in versions before 5.4.92 in the BPF protoc...
A flaw was found in the Linux kernel in versions before 5.4.92 in the BPF protocol. This flaw allows an attacker with a local account to leak information about kernel internal addresses. The highest threat from this vulnerability is to confidentiality.
Scope: local
bookworm: resolved (fixed in 5.10.4-1)
bullseye: resolved (fixed in 5.10.4-1)
forky: resolved (fixed in 5.10.4-1)
sid: resolved (fixed in 5.10.4-1)
trixie: resolved (fixed in 5.10.4-1)
GHSA
GHSA-r3jm-2397-mvmw: A flaw was found in the Linux kernel in versions before 5
ghsa_unreviewed·2022-05-24
CVE-2021-20239 [LOW] CWE-119 GHSA-r3jm-2397-mvmw: A flaw was found in the Linux kernel in versions before 5
A flaw was found in the Linux kernel in versions before 5.4.92 in the BPF protocol. This flaw allows an attacker with a local account to leak information about kernel internal addresses. The highest threat from this vulnerability is to confidentiality.
OSV
CVE-2021-20239: A flaw was found in the Linux kernel in versions before 5
osv·2021-05-28·CVSS 3.3
CVE-2021-20239 [LOW] CVE-2021-20239: A flaw was found in the Linux kernel in versions before 5
A flaw was found in the Linux kernel in versions before 5.4.92 in the BPF protocol. This flaw allows an attacker with a local account to leak information about kernel internal addresses. The highest threat from this vulnerability is to confidentiality.
OSV
linux, linux-aws, linux-azure, linux-gcp, linux-hwe-5.8, linux-kvm, linux-oracle, linux-raspi vulnerabilities
osv·2021-04-13·CVSS 3.3
CVE-2021-20239 [LOW] linux, linux-aws, linux-azure, linux-gcp, linux-hwe-5.8, linux-kvm, linux-oracle, linux-raspi vulnerabilities
linux, linux-aws, linux-azure, linux-gcp, linux-hwe-5.8, linux-kvm, linux-oracle, linux-raspi vulnerabilities
Ryota Shiga discovered that the sockopt BPF hooks in the Linux kernel could
allow a user space program to probe for valid kernel addresses. A local
attacker could use this to ease exploitation of another kernel
vulnerability. (CVE-2021-20239)
It was discovered that the BPF verifier in the Linux kernel did not
properly handle signed add32 and sub integer overflows. A local attacker
could use this to cause a denial of service (system crash) or possibly
execute arbitrary code. (CVE-2021-20268)
It was discovered that the priority inheritance futex implementation in the
Linux kernel contained a race condition, leading to a use-after-free
vulnerability. A local attacker could use this
OSV
linux, linux-aws, linux-aws-5.4, linux-azure, linux-azure-5.4, linux-gcp, linux-gcp-5.4, linux-gke-5.4, linux-gkeop, linux-gkeop-5.4, linux-hwe-5.4, linux-kvm, linux-oracle, linux-oracle-5.4, linux-ra
osv·2021-03-16·CVSS 6.7
CVE-2020-36158 [MEDIUM] linux, linux-aws, linux-aws-5.4, linux-azure, linux-azure-5.4, linux-gcp, linux-gcp-5.4, linux-gke-5.4, linux-gkeop, linux-gkeop-5.4, linux-hwe-5.4, linux-kvm, linux-oracle, linux-oracle-5.4, linux-ra
linux, linux-aws, linux-aws-5.4, linux-azure, linux-azure-5.4, linux-gcp, linux-gcp-5.4, linux-gke-5.4, linux-gkeop, linux-gkeop-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 Marvell WiFi-Ex device driver in the Linux
kernel did not properly validate ad-hoc SSIDs. A local attacker could use
this to cause a denial of service (system crash) or possibly execute
arbitrary code. (CVE-2020-36158)
Ryota Shiga discovered that the sockopt BPF hooks in the Linux kernel could
allow a user space program to probe for valid kernel addresses. A local
attacker could use this to ease exploitation of another kernel
vulnerability. (CVE-2021-20239)
It was discovered that the priority inheritance futex implementation in
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2021-05-28
Published