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Vulnerability details: VCID-nxf6-b31u-aaac
Vulnerability ID VCID-nxf6-b31u-aaac
Aliases CVE-2020-15254
GHSA-v5m7-53cv-f3hx
Summary Crossbeam is a set of tools for concurrent programming. In crossbeam-channel before version 0.4.4, the bounded channel incorrectly assumes that `Vec::from_iter` has allocated capacity that same as the number of iterator elements. `Vec::from_iter` does not actually guarantee that and may allocate extra memory. The destructor of the `bounded` channel reconstructs `Vec` from the raw pointer based on the incorrect assumes described above. This is unsound and causing deallocation with the incorrect capacity when `Vec::from_iter` has allocated different sizes with the number of iterator elements. This has been fixed in crossbeam-channel 0.4.4.
Status Published
Exploitability 0.5
Weighted Severity 9.0
Risk 4.5
Affected and Fixed Packages Package Details
Weaknesses (2)
CWE-401 Missing Release of Memory after Effective Lifetime
CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
System Score Found at
generic_textual Medium http://people.canonical.com/~ubuntu-security/cve/2020/CVE-2020-15254.html
cvssv3 9.8 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-15254.json
epss 0.0051 https://api.first.org/data/v1/epss?cve=CVE-2020-15254
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epss 0.0051 https://api.first.org/data/v1/epss?cve=CVE-2020-15254
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epss 0.0051 https://api.first.org/data/v1/epss?cve=CVE-2020-15254
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epss 0.0051 https://api.first.org/data/v1/epss?cve=CVE-2020-15254
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epss 0.00531 https://api.first.org/data/v1/epss?cve=CVE-2020-15254
epss 0.00531 https://api.first.org/data/v1/epss?cve=CVE-2020-15254
epss 0.00698 https://api.first.org/data/v1/epss?cve=CVE-2020-15254
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epss 0.00698 https://api.first.org/data/v1/epss?cve=CVE-2020-15254
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epss 0.00698 https://api.first.org/data/v1/epss?cve=CVE-2020-15254
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epss 0.00698 https://api.first.org/data/v1/epss?cve=CVE-2020-15254
epss 0.00698 https://api.first.org/data/v1/epss?cve=CVE-2020-15254
epss 0.00698 https://api.first.org/data/v1/epss?cve=CVE-2020-15254
epss 0.00698 https://api.first.org/data/v1/epss?cve=CVE-2020-15254
epss 0.01727 https://api.first.org/data/v1/epss?cve=CVE-2020-15254
rhbs high https://bugzilla.redhat.com/show_bug.cgi?id=1963791
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15254
cvssv3.1_qr HIGH https://github.com/advisories/GHSA-v5m7-53cv-f3hx
cvssv3.1 8.1 https://github.com/crossbeam-rs/crossbeam
generic_textual MODERATE https://github.com/crossbeam-rs/crossbeam
cvssv3.1 8.1 https://github.com/crossbeam-rs/crossbeam/issues/539
generic_textual HIGH https://github.com/crossbeam-rs/crossbeam/issues/539
cvssv3.1 8.1 https://github.com/crossbeam-rs/crossbeam/pull/533
generic_textual HIGH https://github.com/crossbeam-rs/crossbeam/pull/533
cvssv3.1 8.1 https://github.com/crossbeam-rs/crossbeam/security/advisories/GHSA-v5m7-53cv-f3hx
generic_textual HIGH https://github.com/crossbeam-rs/crossbeam/security/advisories/GHSA-v5m7-53cv-f3hx
cvssv3.1 8.1 https://github.com/RustSec/advisory-db/pull/425
generic_textual HIGH https://github.com/RustSec/advisory-db/pull/425
cvssv2 7.5 https://nvd.nist.gov/vuln/detail/CVE-2020-15254
cvssv3 9.8 https://nvd.nist.gov/vuln/detail/CVE-2020-15254
cvssv3.1 9.8 https://nvd.nist.gov/vuln/detail/CVE-2020-15254
cvssv3.1 8.1 https://rustsec.org/advisories/RUSTSEC-2020-0052.html
generic_textual HIGH https://rustsec.org/advisories/RUSTSEC-2020-0052.html
archlinux Critical https://security.archlinux.org/AVG-1256
generic_textual Medium https://ubuntu.com/security/notices/USN-4599-1
generic_textual Medium https://ubuntu.com/security/notices/USN-4599-2
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2020-45
generic_textual Medium https://www.mozilla.org/en-US/security/advisories/mfsa2020-45/#CVE-2020-15254
Reference id Reference type URL
http://people.canonical.com/~ubuntu-security/cve/2020/CVE-2020-15254.html
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-15254.json
https://api.first.org/data/v1/epss?cve=CVE-2020-15254
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15254
https://github.com/crossbeam-rs/crossbeam
https://github.com/crossbeam-rs/crossbeam/issues/539
https://github.com/crossbeam-rs/crossbeam/pull/533
https://github.com/crossbeam-rs/crossbeam/security/advisories/GHSA-v5m7-53cv-f3hx
https://github.com/RustSec/advisory-db/pull/425
https://rustsec.org/advisories/RUSTSEC-2020-0052.html
https://ubuntu.com/security/notices/USN-4599-1
https://ubuntu.com/security/notices/USN-4599-2
https://www.mozilla.org/en-US/security/advisories/mfsa2020-45/#CVE-2020-15254
1963791 https://bugzilla.redhat.com/show_bug.cgi?id=1963791
ASA-202011-1 https://security.archlinux.org/ASA-202011-1
AVG-1256 https://security.archlinux.org/AVG-1256
cpe:2.3:a:crossbeam_project:crossbeam:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:crossbeam_project:crossbeam:*:*:*:*:*:*:*:*
CVE-2020-15254 https://nvd.nist.gov/vuln/detail/CVE-2020-15254
GHSA-v5m7-53cv-f3hx https://github.com/advisories/GHSA-v5m7-53cv-f3hx
mfsa2020-45 https://www.mozilla.org/en-US/security/advisories/mfsa2020-45
USN-4599-1 https://usn.ubuntu.com/4599-1/
USN-4599-2 https://usn.ubuntu.com/4599-2/
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-15254.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://github.com/crossbeam-rs/crossbeam
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://github.com/crossbeam-rs/crossbeam/issues/539
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://github.com/crossbeam-rs/crossbeam/pull/533
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://github.com/crossbeam-rs/crossbeam/security/advisories/GHSA-v5m7-53cv-f3hx
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://github.com/RustSec/advisory-db/pull/425
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2020-15254
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2020-15254
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2020-15254
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://rustsec.org/advisories/RUSTSEC-2020-0052.html
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.63673
EPSS Score 0.0051
Published At March 28, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
There are no relevant records.