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Full vulnerability report · 2024
CVE-2021-47191High confidence

scsi: scsi_debug: Fix out-of-bound read in resp_readcap16()

Linux · Linux

7.1HighCVSS 3.1
Recommended action
Within 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Patch available
Distribution package intelligence

Ubuntu vendor package status

Canonical’s release and source-package findings are shown separately from local repository availability.

1 package state
Repository candidate not checked

A published vendor fix does not prove that a matching update is enabled and installable on a particular asset. Confirm the local package candidate before scheduling remediation.

Ubuntu releaseSource packageVendor stateFixed versionEvidence
Ubuntu 24.04 LTSnoble · standard archivelinux-raspi-realtimeAffected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.Not published in this feedCanonical record ↗Source updated 11 Sept 2026
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Select the national-authority views to include. The exact source language is shown on each matched advisory. Your choice is remembered on this device and encoded in the shareable URL.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2021-33839

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionWithin 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Patch available
01

What, why and how

In the Linux kernel, the following vulnerability has been resolved: scsi: scsi_debug: Fix out-of-bound read in resp_readcap16() The following warning was observed running syzkaller: [ 3813.830724] sg_write: data in/out 65466/242 bytes for SCSI command 0x9e-- guessing data in; [ 3813.830724] program syz-executor not setting count and/or reply_len properly [ 3813.836956] ================================================================== [ 3813.839465] BUG: KASAN: stack-out-of-bounds in sg_copy_buffer+0x157/0x1e0 [ 3813.841773] Read of size 4096 at addr ffff8883cf80f540 by task syz-executor/1549 [ 3813.846612] Call Trace: [ 3813.846995] dump_stack+0x108/0x15f [ 3813.847524] print_address_description+0xa5/0x372 [ 3813.848243] kasan_report.cold+0x236/0x2a8 [ 3813.849439] check_memory_region+0x240/0x270 [ 3813.850094] memcpy+0x30/0x80 [ 3813.850553] sg_copy_buffer+0x157/0x1e0 [ 3813.853032] sg_copy_from_buffer+0x13/0x20 [ 3813.853660] fill_from_dev_buffer+0x135/0x370 [ 3813.854329] resp_readcap16+0x1ac/0x280 [ 3813.856917] schedule_resp+0x41f/0x1630 [ 3813.858203] scsi_debug_queuecommand+0xb32/0x17e0 [ 3813.862699] scsi_dispatch_cmd+0x330/0x950 [ 3813.863329] scsi_request_fn+0xd8e/0x1710 [ 3813.863946] __blk_run_queue+0x10b/0x230 [ 3813.864544] blk_execute_rq_nowait+0x1d8/0x400 [ 3813.865220] sg_common_write.isra.0+0xe61/0x2420 [ 3813.871637] sg_write+0x6c8/0xef0 [ 3813.878853] __vfs_write+0xe4/0x800 [ 3813.883487] vfs_write+0x17b/0x530 [ 3813.884008] ksys_write+0x103/0x270 [ 3813.886268] __x64_sys_write+0x77/0xc0 [ 3813.886841] do_syscall_64+0x106/0x360 [ 3813.887415] entry_SYSCALL_64_after_hwframe+0x44/0xa9 This issue can be reproduced with the following syzkaller log: r0 = openat(0xffffffffffffff9c, &(0x7f0000000040)='./file0\x00', 0x26e1, 0x0) r1 = syz_open_procfs(0xffffffffffffffff, &(0x7f0000000000)='fd/3\x00') open_by_handle_at(r1, &(0x7f00000003c0)=ANY=[@ANYRESHEX], 0x602000) r2 = syz_open_dev$sg(&(0x7f0000000000), 0x0, 0x40782) write$binfmt_aout(r2, &(0x7f0000000340)=ANY=[@ANYBLOB="00000000deff000000000000000000000000000000000000000000000000000047f007af9e107a41ec395f1bded7be24277a1501ff6196a83366f4e6362bc0ff2b247f68a972989b094b2da4fb3607fcf611a22dd04310d28c75039d"], 0x126) In resp_readcap16() we get "int alloc_len" value -1104926854, and then pass the huge arr_len to fill_from_dev_buffer(), but arr is only 32 bytes. This leads to OOB in sg_copy_buffer(). To solve this issue, define alloc_len as u32.

What

In the Linux kernel, the following vulnerability has been resolved: scsi: scsi_debug: Fix out-of-bound read in resp_readcap16() The following warning was observed running syzkaller: [ 3813.830724] sg_write: data in/out 65466/242 bytes for SCSI command 0x9e-- guessing data in; [ 3813.830724] program syz-executor not setting count and/or reply_len properly [ 3813.836956] ================================================================== [ 3813.839465] BUG: KASAN: stack-out-of-bounds in sg_copy_buffer+0x157/0x1e0 [ 3813.841773] Read of size 4096 at addr ffff8883cf80f540 by task syz-executor/1549 [ 3813.846612] Call Trace: [ 3813.846995] dump_stack+0x108/0x15f [ 3813.847524] print_address_description+0xa5/0x372 [ 3813.848243] kasan_report.cold+0x236/0x2a8 [ 3813.849439] check_memory_region+0x240/0x270 [ 3813.850094] memcpy+0x30/0x80 [ 3813.850553] sg_copy_buffer+0x157/0x1e0 [ 3813.853032] sg_copy_from_buffer+0x13/0x20 [ 3813.853660] fill_from_dev_buffer+0x135/0x370 [ 3813.854329] resp_readcap16+0x1ac/0x280 [ 3813.856917] schedule_resp+0x41f/0x1630 [ 3813.858203] scsi_debug_queuecommand+0xb32/0x17e0 [ 3813.862699] scsi_dispatch_cmd+0x330/0x950 [ 3813.863329] scsi_request_fn+0xd8e/0x1710 [ 3813.863946] __blk_run_queue+0x10b/0x230 [ 3813.864544] blk_execute_rq_nowait+0x1d8/0x400 [ 3813.865220] sg_common_write.isra.0+0xe61/0x2420 [ 3813.871637] sg_write+0x6c8/0xef0 [ 3813.878853] __vfs_write+0xe4/0x800 [ 3813.883487] vfs_write+0x17b/0x530 [ 3813.884008] ksys_write+0x103/0x270 [ 3813.886268] __x64_sys_write+0x77/0xc0 [ 3813.886841] do_syscall_64+0x106/0x360 [ 3813.887415] entry_SYSCALL_64_after_hwframe+0x44/0xa9 This issue can be reproduced with the following syzkaller log: r0 = openat(0xffffffffffffff9c, &(0x7f0000000040)='./file0\x00', 0x26e1, 0x0) r1 = syz_open_procfs(0xffffffffffffffff, &(0x7f0000000000)='fd/3\x00') open_by_handle_at(r1, &(0x7f00000003c0)=ANY=[@ANYRESHEX], 0x602000) r2 = syz_open_dev$sg(&(0x7f0000000000), 0x0, 0x40782) write$binfmt_aout(r2, &(0x7f0000000340)=ANY=[@ANYBLOB="00000000deff000000000000000000000000000000000000000000000000000047f007af9e107a41ec395f1bded7be24277a1501ff6196a83366f4e6362bc0ff2b247f68a972989b094b2da4fb3607fcf611a22dd04310d28c75039d"], 0x126) In resp_readcap16() we get "int alloc_len" value -1104926854, and then pass the huge arr_len to fill_from_dev_buffer(), but arr is only 32 bytes. This leads to OOB in sg_copy_buffer(). To solve this issue, define alloc_len as u32.

Why

The product reads data past the end, or before the beginning, of the intended buffer.

How

An attacker operating through local access may attempt exploitation with low privileges. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

In the Linux kernel, the following vulnerability has been resolved: scsi: scsi_debug: Fix out-of-bound read in resp_readcap16() The following warning was observed running syzkaller: [ 3813.830724] sg_write: data in/out 65466/242 bytes for SCSI command 0x9e-- guessing data in; [ 3813.830724] program syz-executor not setting count and/or reply_len properly [ 3813.836956] ================================================================== [ 3813.839465] BUG: KASAN: stack-out-of-bounds in sg_copy_buffer+0x157/0x1e0 [ 3813.841773] Read of size 4096 at addr ffff8883cf80f540 by task syz-executor/1549 [ 3813.846612] Call Trace: [ 3813.846995] dump_stack+0x108/0x15f [ 3813.847524] print_address_description+0xa5/0x372 [ 3813.848243] kasan_report.cold+0x236/0x2a8 [ 3813.849439] check_memory_region+0x240/0x270 [ 3813.850094] memcpy+0x30/0x80 [ 3813.850553] sg_copy_buffer+0x157/0x1e0 [ 3813.853032] sg_copy_from_buffer+0x13/0x20 [ 3813.853660] fill_from_dev_buffer+0x135/0x370 [ 3813.854329] resp_readcap16+0x1ac/0x280 [ 3813.856917] schedule_resp+0x41f/0x1630 [ 3813.858203] scsi_debug_queuecommand+0xb32/0x17e0 [ 3813.862699] scsi_dispatch_cmd+0x330/0x950 [ 3813.863329] scsi_request_fn+0xd8e/0x1710 [ 3813.863946] __blk_run_queue+0x10b/0x230 [ 3813.864544] blk_execute_rq_nowait+0x1d8/0x400 [ 3813.865220] sg_common_write.isra.0+0xe61/0x2420 [ 3813.871637] sg_write+0x6c8/0xef0 [ 3813.878853] __vfs_write+0xe4/0x800 [ 3813.883487] vfs_write+0x17b/0x530 [ 3813.884008] ksys_write+0x103/0x270 [ 3813.886268] __x64_sys_write+0x77/0xc0 [ 3813.886841] do_syscall_64+0x106/0x360 [ 3813.887415] entry_SYSCALL_64_after_hwframe+0x44/0xa9 This issue can be reproduced with the following syzkaller log: r0 = openat(0xffffffffffffff9c, &(0x7f0000000040)='./file0\x00', 0x26e1, 0x0) r1 = syz_open_procfs(0xffffffffffffffff, &(0x7f0000000000)='fd/3\x00') open_by_handle_at(r1, &(0x7f00000003c0)=ANY=[@ANYRESHEX], 0x602000) r2 = syz_open_dev$sg(&(0x7f0000000000), 0x0, 0x40782) write$binfmt_aout(r2, &(0x7f0000000340)=ANY=[@ANYBLOB="00000000deff000000000000000000000000000000000000000000000000000047f007af9e107a41ec395f1bded7be24277a1501ff6196a83366f4e6362bc0ff2b247f68a972989b094b2da4fb3607fcf611a22dd04310d28c75039d"], 0x126) In resp_readcap16() we get "int alloc_len" value -1104926854, and then pass the huge arr_len to fill_from_dev_buffer(), but arr is only 32 bytes. This leads to OOB in sg_copy_buffer(). To solve this issue, define alloc_len as u32.

Why

The product reads data past the end, or before the beginning, of the intended buffer.

How

An attacker operating through local access may attempt exploitation with low privileges. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
local access → Out-of-bounds Read → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Local
Privileges required
Low: a basic authenticated account is required
User interaction
None
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Unchanged: impact remains within the vulnerable component's security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-125 ↗

CWE-125: Out-of-bounds Read. The product reads data past the end, or before the beginning, of the intended buffer.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVLocalAttack vector: The attacker needs local access to the vulnerable system.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRLowPrivileges required: The attacker needs basic user-level privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CHighConfidentiality impact: A successful attack can cause a major loss.INoneIntegrity impact: No direct loss is represented by this metric.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land
The issue can support a local privilege or sandbox boundary transition; normal system utilities may then be available in the gained context.
CWE-125
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

BSI · German · WID-SEC-2024-0851Linux Kernel: Mehrere Schwachstellen

Ein lokaler Angreifer kann mehrere Schwachstellen im Linux Kernel ausnutzen, um einen Denial of Service Angriff durchzuführen oder unbekannte Auswirkungen zu verursachen.

Official advisory ↗
Cyber Security Agency of Singapore · English · CSA-SB-20240417Security Bulletin 17 Apr 2024

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 17 Apr 2024, published on 17 April 2024. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
CERT-FR · French · CERTFR-2025-AVI-1057Multiples vulnérabilités dans les produits VMware

d?id=CVE-2021-47020 Référence CVE CVE-2021-47033 https://www.cve.org/CVERecord?id=CVE-2021-47033 Référence CVE CVE-2021-47041 https://www.cve.org/CVERecord?id=CVE-2021-47041 Référence CVE CVE-2021-47071 https://www.cve.org/CVERecord?id=CVE-2021-47071 Référence CVE CVE-2021-47074 https://www.cve.org/CVERecord?id=CVE-2021-47074 Référence CVE CVE-2021-47079 https://www.cve.org/CVERecord?id=CVE-2021-47079 Référence CVE CVE-2021-47092 https://www.cve.org/CVERecord?id=CVE-2021-47092 Référence CVE CVE-2021-47097 https://www.cve.org/CVERecord?id=CVE-2021-47097 Référence CVE CVE-2021-47098 https://www.cve.org/CVERecord?id=CVE-2021-47098 Référence CVE CVE-2021-47191 https://www.cve.org/CVERecord?id=CVE-2021-47191 Référence CVE CVE-2021-47196 https://www.cve.org/CVERecord?id=CVE-2021-47196 Référence CVE CVE-2021-47197 https://www.cve.org/CVERecord?id=CVE-2021-47197 Référence CVE CVE-2021-47202 https://www.cve.org/CVERecord?id=CVE-2021-47202 Référence CVE CVE-2021-47210 https://www.cve.org/CVERecord?id=CVE-2021-47210 Référence CVE CVE-2021-47214 https://www.cve.org/CVERecord?id=CVE-2021-47214 Référence CVE CVE-2021-47215 https://www.cve.org/CVERecord?id=CVE-2021-47215 Référence CVE CVE-2021-47217 https://www.cve.org/CVERecord?id=CVE-2021-47217 Référence CVE CVE-2021-47222 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2025-AVI-0605Multiples vulnérabilités dans le noyau Linux d'Ubuntu

u bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation). Documentation Bulletin de sécurité Ubuntu USN-7608-6 du 11 juillet 2025 https://ubuntu.com/security/notices/USN-7608-6 Bulletin de sécurité Ubuntu USN-7610-3 du 15 juillet 2025 https://ubuntu.com/security/notices/USN-7610-3 Bulletin de sécurité Ubuntu USN-7585-7 du 16 juillet 2025 https://ubuntu.com/security/notices/USN-7585-7 Bulletin de sécurité Ubuntu USN-7640-1 du 16 juillet 2025 https://ubuntu.com/security/notices/USN-7640-1 Bulletin de sécurité Ubuntu USN-7611-3 du 17 juillet 2025 https://ubuntu.com/security/notices/USN-7611-3 Référence CVE CVE-2021-47191 https://www.cve.org/CVERecord?id=CVE-2021-47191 Référence CVE CVE-2021-47211 https://www.cve.org/CVERecord?id=CVE-2021-47211 Référence CVE CVE-2022-49636 https://www.cve.org/CVERecord?id=CVE-2022-49636 Référence CVE CVE-2023-52664 https://www.cve.org/CVERecord?id=CVE-2023-52664 Référence CVE CVE-2023-52741 https://www.cve.org/CVERecord?id=CVE-2023-52741 Référence CVE CVE-2023-52927 https://www.cve.org/CVERecord?id=CVE-2023-52927 Référence CVE CVE-2023-53034 https://www.cve.org/CVERecord?id=CVE-2023-53034 Référence CVE CVE-2024-26689 https://www.cve.org/CVERecord?id=CVE-2024-26689 Référence CVE CVE-2024-26982 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2025-AVI-0387Multiples vulnérabilités dans le noyau Linux d'Ubuntu

Bulletin de sécurité Ubuntu USN-7498-1 du 07 mai 2025 https://ubuntu.com/security/notices/USN-7498-1 Bulletin de sécurité Ubuntu USN-7499-1 du 07 mai 2025 https://ubuntu.com/security/notices/USN-7499-1 Bulletin de sécurité Ubuntu USN-7500-1 du 07 mai 2025 https://ubuntu.com/security/notices/USN-7500-1 Bulletin de sécurité Ubuntu USN-7500-2 du 07 mai 2025 https://ubuntu.com/security/notices/USN-7500-2 Référence CVE CVE-2021-47119 https://www.cve.org/CVERecord?id=CVE-2021-47119 Référence CVE CVE-2021-47150 https://www.cve.org/CVERecord?id=CVE-2021-47150 Référence CVE CVE-2021-47163 https://www.cve.org/CVERecord?id=CVE-2021-47163 Référence CVE CVE-2021-47191 https://www.cve.org/CVERecord?id=CVE-2021-47191 Référence CVE CVE-2021-47219 https://www.cve.org/CVERecord?id=CVE-2021-47219 Référence CVE CVE-2022-0995 https://www.cve.org/CVERecord?id=CVE-2022-0995 Référence CVE CVE-2023-52458 https://www.cve.org/CVERecord?id=CVE-2023-52458 Référence CVE CVE-2023-52664 https://www.cve.org/CVERecord?id=CVE-2023-52664 Référence CVE CVE-2023-52741 https://www.cve.org/CVERecord?id=CVE-2023-52741 Référence CVE CVE-2023-52927 https://www.cve.org/CVERecord?id=CVE-2023-52927 Référence CVE CVE-2024-26689 https://www.cve.org/CVERecord?id=CVE-2024-26689 Référence CVE CVE-2024-26837 https://www.cve.org/CVERecord?id=CV

Official advisory ↗
CERT-FR · French · CERTFR-2024-AVI-0717Multiples vulnérabilités dans le noyau Linux de SUSE

ate/announcement/2024/suse-su-20242973-1 Bulletin de sécurité SUSE SUSE-SU-2024:2980-1 du 20 août 2024 https://www.suse.com/support/update/announcement/2024/suse-su-20242980-1 Référence CVE CVE-2020-26558 https://www.cve.org/CVERecord?id=CVE-2020-26558 Référence CVE CVE-2021-0129 https://www.cve.org/CVERecord?id=CVE-2021-0129 Référence CVE CVE-2021-47086 https://www.cve.org/CVERecord?id=CVE-2021-47086 Référence CVE CVE-2021-47103 https://www.cve.org/CVERecord?id=CVE-2021-47103 Référence CVE CVE-2021-47126 https://www.cve.org/CVERecord?id=CVE-2021-47126 Référence CVE CVE-2021-47186 https://www.cve.org/CVERecord?id=CVE-2021-47186 Référence CVE CVE-2021-47191 https://www.cve.org/CVERecord?id=CVE-2021-47191 Référence CVE CVE-2021-47194 https://www.cve.org/CVERecord?id=CVE-2021-47194 Référence CVE CVE-2021-47197 https://www.cve.org/CVERecord?id=CVE-2021-47197 Référence CVE CVE-2021-47219 https://www.cve.org/CVERecord?id=CVE-2021-47219 Référence CVE CVE-2021-47291 https://www.cve.org/CVERecord?id=CVE-2021-47291 Référence CVE CVE-2021-47295 https://www.cve.org/CVERecord?id=CVE-2021-47295 Référence CVE CVE-2021-47388 https://www.cve.org/CVERecord?id=CVE-2021-47388 Référence CVE CVE-2021-47395 https://www.cve.org/CVERecord?id=CVE-2021-47395 Référence CVE CVE-2021-47399 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2024-AVI-0693Multiples vulnérabilités dans le noyau Linux de SUSE

cord?id=CVE-2021-0129 Référence CVE CVE-2021-43389 https://www.cve.org/CVERecord?id=CVE-2021-43389 Référence CVE CVE-2021-4439 https://www.cve.org/CVERecord?id=CVE-2021-4439 Référence CVE CVE-2021-47086 https://www.cve.org/CVERecord?id=CVE-2021-47086 Référence CVE CVE-2021-47089 https://www.cve.org/CVERecord?id=CVE-2021-47089 Référence CVE CVE-2021-47103 https://www.cve.org/CVERecord?id=CVE-2021-47103 Référence CVE CVE-2021-47126 https://www.cve.org/CVERecord?id=CVE-2021-47126 Référence CVE CVE-2021-47145 https://www.cve.org/CVERecord?id=CVE-2021-47145 Référence CVE CVE-2021-47186 https://www.cve.org/CVERecord?id=CVE-2021-47186 Référence CVE CVE-2021-47191 https://www.cve.org/CVERecord?id=CVE-2021-47191 Référence CVE CVE-2021-47194 https://www.cve.org/CVERecord?id=CVE-2021-47194 Référence CVE CVE-2021-47197 https://www.cve.org/CVERecord?id=CVE-2021-47197 Référence CVE CVE-2021-47201 https://www.cve.org/CVERecord?id=CVE-2021-47201 Référence CVE CVE-2021-47219 https://www.cve.org/CVERecord?id=CVE-2021-47219 Référence CVE CVE-2021-47275 https://www.cve.org/CVERecord?id=CVE-2021-47275 Référence CVE CVE-2021-47291 https://www.cve.org/CVERecord?id=CVE-2021-47291 Référence CVE CVE-2021-47295 https://www.cve.org/CVERecord?id=CVE-2021-47295 Référence CVE CVE-2021-47388 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2024-AVI-0610Multiples vulnérabilités dans le noyau Linux de SUSE

/announcement/2024/suse-su-20242559-1 Bulletin de sécurité SUSE SUSE-SU-2024:2561-1 du 18 juillet 2024 https://www.suse.com/support/update/announcement/2024/suse-su-20242561-1 Référence CVE CVE-2020-10135 https://www.cve.org/CVERecord?id=CVE-2020-10135 Référence CVE CVE-2021-43389 https://www.cve.org/CVERecord?id=CVE-2021-43389 Référence CVE CVE-2021-4439 https://www.cve.org/CVERecord?id=CVE-2021-4439 Référence CVE CVE-2021-46955 https://www.cve.org/CVERecord?id=CVE-2021-46955 Référence CVE CVE-2021-47103 https://www.cve.org/CVERecord?id=CVE-2021-47103 Référence CVE CVE-2021-47145 https://www.cve.org/CVERecord?id=CVE-2021-47145 Référence CVE CVE-2021-47191 https://www.cve.org/CVERecord?id=CVE-2021-47191 Référence CVE CVE-2021-47193 https://www.cve.org/CVERecord?id=CVE-2021-47193 Référence CVE CVE-2021-47201 https://www.cve.org/CVERecord?id=CVE-2021-47201 Référence CVE CVE-2021-47267 https://www.cve.org/CVERecord?id=CVE-2021-47267 Référence CVE CVE-2021-47270 https://www.cve.org/CVERecord?id=CVE-2021-47270 Référence CVE CVE-2021-47275 https://www.cve.org/CVERecord?id=CVE-2021-47275 Référence CVE CVE-2021-47293 https://www.cve.org/CVERecord?id=CVE-2021-47293 Référence CVE CVE-2021-47294 https://www.cve.org/CVERecord?id=CVE-2021-47294 Référence CVE CVE-2021-47297 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2024-AVI-0578Multiples vulnérabilités dans le noyau Linux de SUSE

ecord?id=CVE-2021-26345 Référence CVE CVE-2021-3896 https://www.cve.org/CVERecord?id=CVE-2021-3896 Référence CVE CVE-2021-43389 https://www.cve.org/CVERecord?id=CVE-2021-43389 Référence CVE CVE-2021-4439 https://www.cve.org/CVERecord?id=CVE-2021-4439 Référence CVE CVE-2021-46766 https://www.cve.org/CVERecord?id=CVE-2021-46766 Référence CVE CVE-2021-46774 https://www.cve.org/CVERecord?id=CVE-2021-46774 Référence CVE CVE-2021-46955 https://www.cve.org/CVERecord?id=CVE-2021-46955 Référence CVE CVE-2021-47089 https://www.cve.org/CVERecord?id=CVE-2021-47089 Référence CVE CVE-2021-47103 https://www.cve.org/CVERecord?id=CVE-2021-47103 Référence CVE CVE-2021-47191 https://www.cve.org/CVERecord?id=CVE-2021-47191 Référence CVE CVE-2021-47193 https://www.cve.org/CVERecord?id=CVE-2021-47193 Référence CVE CVE-2021-47247 https://www.cve.org/CVERecord?id=CVE-2021-47247 Référence CVE CVE-2021-47267 https://www.cve.org/CVERecord?id=CVE-2021-47267 Référence CVE CVE-2021-47270 https://www.cve.org/CVERecord?id=CVE-2021-47270 Référence CVE CVE-2021-47293 https://www.cve.org/CVERecord?id=CVE-2021-47293 Référence CVE CVE-2021-47294 https://www.cve.org/CVERecord?id=CVE-2021-47294 Référence CVE CVE-2021-47297 https://www.cve.org/CVERecord?id=CVE-2021-47297 Référence CVE CVE-2021-47309 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2024-AVI-0420Multiples vulnérabilités dans le noyau Linux de SUSE

d?id=CVE-2021-47180 Référence CVE CVE-2021-47181 https://www.cve.org/CVERecord?id=CVE-2021-47181 Référence CVE CVE-2021-47182 https://www.cve.org/CVERecord?id=CVE-2021-47182 Référence CVE CVE-2021-47183 https://www.cve.org/CVERecord?id=CVE-2021-47183 Référence CVE CVE-2021-47184 https://www.cve.org/CVERecord?id=CVE-2021-47184 Référence CVE CVE-2021-47185 https://www.cve.org/CVERecord?id=CVE-2021-47185 Référence CVE CVE-2021-47187 https://www.cve.org/CVERecord?id=CVE-2021-47187 Référence CVE CVE-2021-47188 https://www.cve.org/CVERecord?id=CVE-2021-47188 Référence CVE CVE-2021-47189 https://www.cve.org/CVERecord?id=CVE-2021-47189 Référence CVE CVE-2021-47191 https://www.cve.org/CVERecord?id=CVE-2021-47191 Référence CVE CVE-2021-47192 https://www.cve.org/CVERecord?id=CVE-2021-47192 Référence CVE CVE-2021-47193 https://www.cve.org/CVERecord?id=CVE-2021-47193 Référence CVE CVE-2021-47194 https://www.cve.org/CVERecord?id=CVE-2021-47194 Référence CVE CVE-2021-47195 https://www.cve.org/CVERecord?id=CVE-2021-47195 Référence CVE CVE-2021-47196 https://www.cve.org/CVERecord?id=CVE-2021-47196 Référence CVE CVE-2021-47197 https://www.cve.org/CVERecord?id=CVE-2021-47197 Référence CVE CVE-2021-47198 https://www.cve.org/CVERecord?id=CVE-2021-47198 Référence CVE CVE-2021-47199 https://www.cve.org/CVERecord?id=

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2021-021587Linux の Linux Kernel における境界外読み取りに関する脆弱性

Linux の Linux Kernel には、境界外読み取りに関する脆弱性が存在します。

Official advisory ↗
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Patch available
Affected
Linux: c65b1445d153a66ca91b00c1f10187e495c17918 < 3e20cb072679bdb47747ccc8bee3233a4cf0765a, c65b1445d153a66ca91b00c1f10187e495c17918 < 5b8bed6464ad6653586e30df046185fd816ad999, c65b1445d153a66ca91b00c1f10187e495c17918 < 4e3ace0051e7e504b55d239daab8789dd89b863c, 2.6.18
Fixed
Linux: < 2.6.18, 5.10.82 ≤ 5.10.*, 5.15.5 ≤ 5.15.*, 5.16 ≤ *
Action
Review the linked authoritative reference and apply the recorded fixed release appropriate to the affected product branch.
Workaround
No verified workaround is recorded. Limit untrusted access and use least privilege until authoritative guidance is available.
04

Evidence and provenance

Published 10 Apr 2024 · Last source change 5 Aug 2026, 08:46 UTC · CWE-125 · Out-of-bounds Read

CVE recordCVE.org · 5.2
CVSS sourceCNA
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2021-33839
Product sourceCNA
Remediation sourceCVE/CNA references
CWE sourceNIST NVD
NVD statusNVD modified after enrichment

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates ↗

No material field changes have been recorded since change tracking began. Routine source refreshes and cosmetic edits are intentionally excluded.

Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Fixed release or patch reference recorded
ENISA EUVD · EUVD-2021-33839↗CVE authority or vendor reference↗Patch or update reference↗Patch or update reference↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2021-47191 · cve.blacktree.nl