CVE-2021-47633

highpriority · track · 28EPSS 0.003 · 18 %ileDEEURUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.26% (18th) EPSS

CVSS 7.1 · high

Is it mine?

43 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · suse_csaf

EPSS · scored 2026-10-27

In the Linux kernel, the following vulnerability has been resolved: ath5k: fix OOB in ath5k_eeprom_read_pcal_info_5111 The bug was found during fuzzing. Stacktrace locates it in ath5k_eeprom_convert_pcal_info_5111. When none of the curve is selected in the loop, idx can go up to AR5K_EEPROM_N_PD_CURVES. The line makes pd out of bound. pd = &chinfo[pier].pd_curves[idx]; There are many OOB writes using pd later in the code. So I added a sanity check for idx. Checks for other loops involving AR5K_EEPROM_N_PD_CURVES are not needed as the loop index is not used outside the loops. The patch is NOT tested with real device. The following is the fuzzing report BUG: KASAN: slab-out-of-bounds in ath5k_eeprom_read_pcal_info_5111+0x126a/0x1390 [ath5k] Write of size 1 at addr ffff8880174a4d60 by task modprobe/214 CPU: 0 PID: 214 Comm: modprobe Not tainted 5.6.0 #1 Call Trace: dump_stack+0x76/0xa0 print_address_description.constprop.0+0x16/0x200 ? ath5k_eeprom_read_pcal_info_5111+0x126a/0x1390 [ath5k] ? ath5k_eeprom_read_pcal_info_5111+0x126a/0x1390 [ath5k] __kasan_report.cold+0x37/0x7c ? ath5k_eeprom_read_pcal_info_5111+0x126a/0x1390 [ath5k] kasan_report+0xe/0x20 ath5k_eeprom_read_pcal_info_5111+0x126a/0x1390 [ath5k] ? apic_timer_interrupt+0xa/0x20 ? ath5k_eeprom_init_11a_pcal_freq+0xbc0/0xbc0 [ath5k] ? ath5k_pci_eeprom_read+0x228/0x3c0 [ath5k] ath5k_eeprom_init+0x2513/0x6290 [ath5k] ? ath5k_eeprom_init_11a_pcal_freq+0xbc0/0xbc0 [ath5k] ? usleep_range+0xb8/0x100 ? apic_timer_interrupt+0xa/0x20 ? ath5k_eeprom_read_pcal_info_2413+0x2f20/0x2f20 [ath5k] ath5k_hw_init+0xb60/0x1970 [ath5k] ath5k_init_ah+0x6fe/0x2530 [ath5k] ? kasprintf+0xa6/0xe0 ? ath5k_stop+0x140/0x140 [ath5k] ? _dev_notice+0xf6/0xf6 ? apic_timer_interrupt+0xa/0x20 ath5k_pci_probe.cold+0x29a/0x3d6 [ath5k] ? ath5k_pci_eeprom_read+0x3c0/0x3c0 [ath5k] ? mutex_lock+0x89/0xd0 ? ath5k_pci_eeprom_read+0x3c0/0x3c0 [ath5k] local_pci_probe+0xd3/0x160 pci_device_probe+0x23f/0x3e0 ? pci_device_remove+0x280/0x280 ? pci_device_remove+0x280/0x280 really_probe+0x209/0x5d0

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

Fixedkernel-default-3.0.101-108.180.1.x86_64 as component of SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME COREsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedkernel-default-base-3.0.101-108.180.1.x86_64 as component of SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME COREsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedkernel-default-devel-3.0.101-108.180.1.x86_64 as component of SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME COREsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedkernel-ec2-3.0.101-108.180.1.x86_64 as component of SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME COREsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedkernel-ec2-base-3.0.101-108.180.1.x86_64 as component of SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME COREsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedkernel-ec2-devel-3.0.101-108.180.1.x86_64 as component of SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME COREsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedkernel-source-3.0.101-108.180.1.x86_64 as component of SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME COREsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedkernel-syms-3.0.101-108.180.1.x86_64 as component of SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME COREsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedkernel-trace-3.0.101-108.180.1.x86_64 as component of SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME COREsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedkernel-trace-base-3.0.101-108.180.1.x86_64 as component of SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME COREsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedkernel-trace-devel-3.0.101-108.180.1.x86_64 as component of SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME COREsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedkernel-xen-3.0.101-108.180.1.x86_64 as component of SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME COREsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedkernel-xen-base-3.0.101-108.180.1.x86_64 as component of SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME COREsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedkernel-xen-devel-3.0.101-108.180.1.x86_64 as component of SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME COREsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedkernel-default-0:3.0.101-108.180.1.x86_64 as component of SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME COREsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedkernel-default-base-0:3.0.101-108.180.1.x86_64 as component of SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME COREsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedkernel-default-devel-0:3.0.101-108.180.1.x86_64 as component of SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME COREsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedkernel-docs-0:3.0.101-108.180.1.noarch as component of SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME COREsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedkernel-ec2-0:3.0.101-108.180.1.x86_64 as component of SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME COREsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedkernel-ec2-base-0:3.0.101-108.180.1.x86_64 as component of SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME COREsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedkernel-ec2-devel-0:3.0.101-108.180.1.x86_64 as component of SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME COREsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedkernel-source-0:3.0.101-108.180.1.x86_64 as component of SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME COREsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedkernel-syms-0:3.0.101-108.180.1.x86_64 as component of SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME COREsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedkernel-trace-0:3.0.101-108.180.1.x86_64 as component of SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME COREsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedkernel-trace-base-0:3.0.101-108.180.1.x86_64 as component of SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME COREsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedkernel-trace-devel-0:3.0.101-108.180.1.x86_64 as component of SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME COREsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedkernel-xen-0:3.0.101-108.180.1.x86_64 as component of SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME COREsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedkernel-xen-base-0:3.0.101-108.180.1.x86_64 as component of SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME COREsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedkernel-xen-devel-0:3.0.101-108.180.1.x86_64 as component of SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME COREsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".

cvss

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

7.1

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.5–7.1

v3.17.1highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:Hprimary · NVD / NIST USexploitability 1.8 · impact 5.2

v3.17.1highAV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:Hsecondary · FSTEC (BDU) RU

v3.16.5mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

v3.17.1highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:Hsecondary · SUSE Product Security

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-125USprimaryCWE-125US

affected products (43)

Products and version ranges known to be affected.

Linux Linux≤ 2.6.30enisa_euvdEU
Linux Linuxall versionsenisa_euvdEU
Linux Linux< 4.14.276enisa_euvdEU
Linux Linux< 4.19.238enisa_euvdEU
Linux Linux< 4.9.311enisa_euvdEU
Linux Linux< 5.10.111enisa_euvdEU
Linux Linux< 5.15.34enisa_euvdEU
Linux Linux< 5.16.20enisa_euvdEU
Linux Linux< 5.17.3enisa_euvdEU
Linux Linux< 5.18enisa_euvdEU
Linux Linux< 5.4.189enisa_euvdEU
Linux Linux8e218fb24fae… → 25efc5d03455…enisa_euvdEU
Linux Linux8e218fb24fae… → 564d4eceb97e…enisa_euvdEU
Linux Linux8e218fb24fae… → 9d7d83d0399e…enisa_euvdEU
Linux Linux8e218fb24fae… → be2f81024e79…enisa_euvdEU
Linux Linux8e218fb24fae… → c4e2f577271e…enisa_euvdEU
Linux Linux8e218fb24fae… → cbd96d6cad66…enisa_euvdEU
Linux Linux8e218fb24fae… → ed3dfdaa8b5f…enisa_euvdEU
Linux Linux8e218fb24fae… → f4de974019a0…enisa_euvdEU
Linux Linux8e218fb24fae… → fc8f7752a82f…enisa_euvdEU

showing 20 of 43

advisories (2)

Vendor and ecosystem advisories describing this.

SUSE-SU-2025:0983-1Security update for the Linux Kernel2025-03-21csaf · suse_csafDE
Security update for the Linux Kernel
SUSE-SU-2026:0385-1Security update for the Linux Kernel2026-02-04csaf · suse_csafDE
Security update for the Linux Kernel

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu suse_csaf NVD CVE.org MITRE

published 2025-02-26modified 2026-06-17

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+11869 more

references (28)

External citations — patches, advisories, analysis.

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