CVE-2020-8835

highpriority · track · 43EPSS 0.060 · 93 %ileexploit · PoCEURUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

7 exploits · PoC

Likely / severe?

6.01% (93rd) EPSS

CVSS 7.2 · high

Is it mine?

45 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

EPSS · scored 2026-10-27

In the Linux kernel 5.5.0 and newer, the bpf verifier (kernel/bpf/verifier.c) did not properly restrict the register bounds for 32-bit operations, leading to out-of-bounds reads and writes in kernel memory. The vulnerability also affects the Linux 5.4 stable series, starting with v5.4.7, as the introducing commit was backported to that branch. This vulnerability was fixed in 5.6.1, 5.5.14, and 5.4.29. (issue is aka ZDI-CAN-10780)

cvss

Technical severity, 0–10. One row per scoring source.

7.8

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.07.2highAV:L/AC:L/Au:N/C:C/I:C/A:Cprimary · NVD / NIST USexploitability 3.9 · impact 10

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 1.8 · impact 5.9

v3.17.8highAV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.17.8highCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:Hsecondary · ENISA EU

v3.17.8highCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:Hsecondary · security@ubuntu.comexploitability 1.1 · impact 6

v3.17.4highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:Psecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-125USprimaryCWE-787USprimaryCWE-119USCWE-125USCWE-787US

exploits (7)

Public proof-of-concept and weaponised exploit code.

Prabhashaka/Exploitation-CVE-2020-8835Prabhashaka/Exploitation-CVE-2020-8835PoC · poc_in_github
SplendidSky/CVE-2020-8835SplendidSky/CVE-2020-8835PoC · poc_in_github
WhatsWrongAndWhy/CVE-2020-8835WhatsWrongAndWhy/CVE-2020-8835PoC · poc_in_github
digamma-ai/CVE-2020-8835-verificationFormal verification example for CVE-2020-8835PoC · poc_in_github
johnatag/INF8602-CVE-2020-8835johnatag/INF8602-CVE-2020-8835PoC · poc_in_github
snappyJack/Rick_write_exp_CVE-2020-8835snappyJack/Rick_write_exp_CVE-2020-8835PoC · poc_in_github

affected products (45)

Products and version ranges known to be affected.

Linux kernel Linux kernel5.4.7 → 5.4-stable*enisa_euvdEU
Linux kernel Linux kernel5.5-stable → 5.5.14enisa_euvdEU
Linux kernel Linux kernel5.6-stable → 5.6.1enisa_euvdEU
Canonical Ltd. Ubuntu≤ 19.10fstec_bduRU
Canonical Ltd. Ubuntu≤ 18.04 LTSfstec_bduRU
Fedora Project Fedora≤ 30fstec_bduRU
Fedora Project Fedora≤ 32fstec_bduRU
Fedora Project Fedora≤ 31fstec_bduRU
АО «НППКТ» ОСОН ОСнова Оnyx≤ 2.4fstec_bduRU
ООО «РусБИТех-Астра» Astra Linux Common Edition≤ 2.12 «Орёл»fstec_bduRU
Сообщество свободного программного обеспечения Linux≤ 5.6.0fstec_bduRU
Сообщество свободного программного обеспечения Linux5.4.7 → 5.4.28fstec_bduRU
Сообщество свободного программного обеспечения Linux5.5.0 → 5.5.13fstec_bduRU
canonical ubuntu linux= 18.04nvdUScpe:2.3:o:canonical:ubuntu_linux:*:*:*:*:*:*:*:*
canonical ubuntu linux= 19.10nvdUScpe:2.3:o:canonical:ubuntu_linux:*:*:*:*:*:*:*:*
fedoraproject fedora= 30nvdUScpe:2.3:o:fedoraproject:fedora:*:*:*:*:*:*:*:*
fedoraproject fedora= 31nvdUScpe:2.3:o:fedoraproject:fedora:*:*:*:*:*:*:*:*
fedoraproject fedora= 32nvdUScpe:2.3:o:fedoraproject:fedora:*:*:*:*:*:*:*:*
linux linux kernel5.4.7 → 5.4.29nvdUScpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux kernel5.5.0 → 5.5.14nvdUScpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

showing 20 of 45

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu nvd NVD CVE.org MITRE

published 2020-04-02modified 2026-06-17

related (27,239)

Related entries.

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In the Linux kernel, the following vulnerability has been resolved: ipv6: account for fraggap on the paged allocation path In __ip6_append_data(), when the paged-allocation branc…
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+27234 more

references (38)

External citations — patches, advisories, analysis.

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