CVE-2021-47284: isdn: mISDN: netjet: Fix crash in nj_probe:

Analyzed

AliasesUBUNTU-CVE-2021-47284DEBIAN-CVE-2021-47284

Published 21-05-2024Last modified 11-05-2026

Vulnerability summary

CVE-2021-47284 is a medium (CVSS 4.7) Uncontrolled Resource Consumption vulnerability in linux. EPSS estimates a 0.23% chance of exploitation in the next 30 days, higher than 13.4% of scored vulnerabilities.

Priority

Routine

Not severe (CVSS 4.7, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?

CVSS score

4.7/10

010

Medium · v3.1 (CVE.org)

EPSS score

0.23%

0%100%

Low · 0.00 pp in 30 days

KEVNot listedNot listed by any tracked catalog.

RansomwareNot flaggedNo ransomware use recorded.

Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 8 · Related 6

RHSA-2024:5101 RHSA-2024:5102 SUSE-SU-2024:1979-1 SUSE-SU-2024:1983-1 SUSE-SU-2024:2010-1 SUSE-SU-2024:2183-1+2 more

Timeline

21-05-2024
PublishedVulnerability first disclosed.
11-05-2026
Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: isdn: mISDN: netjet: Fix crash in nj_probe: 'nj_setup' in netjet.c might fail with -EIO and in this case 'card->irq' is initialized and is bigger than zero. A subsequent call to 'nj_release' will free the irq that has not been requested. Fix this bug by deleting the previous assignment to 'card->irq' and just keep the assignment before 'request_irq'. The KASAN's log reveals it: [ 3.354615 ] WARNING: CPU: 0 PID: 1 at kernel/irq/manage.c:1826 free_irq+0x100/0x480 [ 3.355112 ] Modules linked in: [ 3.355310 ] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.13.0-rc1-00144-g25a1298726e #13 [ 3.355816 ] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014 [ 3.356552 ] RIP: 0010:free_irq+0x100/0x480 [ 3.356820 ] Code: 6e 08 74 6f 4d 89 f4 e8 5e ac 09 00 4d 8b 74 24 18 4d 85 f6 75 e3 e8 4f ac 09 00 8b 75 c8 48 c7 c7 78 c1 2e 85 e8 e0 cf f5 ff <0f> 0b 48 8b 75 c0 4c 89 ff e8 72 33 0b 03 48 8b 43 40 4c 8b a0 80 [ 3.358012 ] RSP: 0000:ffffc90000017b48 EFLAGS: 00010082 [ 3.358357 ] RAX: 0000000000000000 RBX: ffff888104dc8000 RCX: 0000000000000000 [ 3.358814 ] RDX: ffff8881003c8000 RSI: ffffffff8124a9e6 RDI: 00000000ffffffff [ 3.359272 ] RBP: ffffc90000017b88 R08: 0000000000000000 R09: 0000000000000000 [ 3.359732 ] R10: ffffc900000179f0 R11: 0000000000001d04 R12: 0000000000000000 [ 3.360195 ] R13: ffff888107dc6000 R14: ffff888107dc6928 R15: ffff888104dc80a8 [ 3.360652 ] FS: 0000000000000000(0000) GS:ffff88817bc00000(0000) knlGS:0000000000000000 [ 3.361170 ] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 3.361538 ] CR2: 0000000000000000 CR3: 000000000582e000 CR4: 00000000000006f0 [ 3.362003 ] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 3.362175 ] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 3.362175 ] Call Trace: [ 3.362175 ] nj_release+0x51/0x1e0 [ 3.362175 ] nj_probe+0x450/0x950 [ 3.362175 ] ? pci_device_remove+0x110/0x110 [ 3.362175 ] local_pci_probe+0x45/0xa0 [ 3.362175 ] pci_device_probe+0x12b/0x1d0 [ 3.362175 ] really_probe+0x2a9/0x610 [ 3.362175 ] driver_probe_device+0x90/0x1d0 [ 3.362175 ] ? mutex_lock_nested+0x1b/0x20 [ 3.362175 ] device_driver_attach+0x68/0x70 [ 3.362175 ] __driver_attach+0x124/0x1b0 [ 3.362175 ] ? device_driver_attach+0x70/0x70 [ 3.362175 ] bus_for_each_dev+0xbb/0x110 [ 3.362175 ] ? rdinit_setup+0x45/0x45 [ 3.362175 ] driver_attach+0x27/0x30 [ 3.362175 ] bus_add_driver+0x1eb/0x2a0 [ 3.362175 ] driver_register+0xa9/0x180 [ 3.362175 ] __pci_register_driver+0x82/0x90 [ 3.362175 ] ? w6692_init+0x38/0x38 [ 3.362175 ] nj_init+0x36/0x38 [ 3.362175 ] do_one_initcall+0x7f/0x3d0 [ 3.362175 ] ? rdinit_setup+0x45/0x45 [ 3.362175 ] ? rcu_read_lock_sched_held+0x4f/0x80 [ 3.362175 ] kernel_init_freeable+0x2aa/0x301 [ 3.362175 ] ? rest_init+0x2c0/0x2c0 [ 3.362175 ] kernel_init+0x18/0x190 [ 3.362175 ] ? rest_init+0x2c0/0x2c0 [ 3.362175 ] ? rest_init+0x2c0/0x2c0 [ 3.362175 ] ret_from_fork+0x1f/0x30 [ 3.362175 ] Kernel panic - not syncing: panic_on_warn set ... [ 3.362175 ] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.13.0-rc1-00144-g25a1298726e #13 [ 3.362175 ] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014 [ 3.362175 ] Call Trace: [ 3.362175 ] dump_stack+0xba/0xf5 [ 3.362175 ] ? free_irq+0x100/0x480 [ 3.362175 ] panic+0x15a/0x3f2 [ 3.362175 ] ? __warn+0xf2/0x150 [ 3.362175 ] ? free_irq+0x100/0x480 [ 3.362175 ] __warn+0x108/0x150 [ 3.362175 ] ? free_irq+0x100/0x480 [ 3.362175 ] report_bug+0x119/0x1c0 [ 3.362175 ] handle_bug+0x3b/0x80 [ 3.362175 ] exc_invalid_op+0x18/0x70 [ 3.362175 ] asm_exc_invalid_op+0x12/0x20 [ 3.362175 ] RIP: 0010:free_irq+0x100 ---truncated---

CVSS metrics

4 scores · 4 sources · 1 version

v3.14.7

EPSS trend

Probability

0.23%

Chance of exploitation in the next 30 days

Percentile

13%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.23% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs

CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

CWE-400Uncontrolled Resource ConsumptionThe product does not properly control the allocation and maintenance of a limited resource.

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu87 products

linuxAll versions (No fix recorded) | < 4.15.0-156.163 | < 5.4.0-81.91
linux-allwinner-5.19All versions (No fix recorded)
linux-awsAll versions (No fix recorded) | < 4.15.0-1111.118 | < 5.4.0-1055.58
linux-aws-5.0All versions (No fix recorded)
linux-aws-5.11All versions (No fix recorded)

linux-aws-5.13All versions (No fix recorded)
linux-aws-5.19All versions (No fix recorded)
linux-aws-5.3All versions (No fix recorded)
linux-aws-5.4< 5.4.0-1055.58~18.04.1
linux-aws-5.8All versions (No fix recorded)
linux-aws-6.2All versions (No fix recorded)
linux-aws-fips< 4.15.0-2053.55 | All versions (No fix recorded) | < 5.4.0-1069.73+fips2
linux-aws-hwe< 4.15.0-1111.118~16.04.1
linux-azure< 4.15.0-1123.136~14.04.1 | < 4.15.0-1123.136~16.04.1 | All versions (No fix recorded) | < 5.4.0-1056.58
linux-azure-4.15< 4.15.0-1123.136
linux-azure-5.11All versions (No fix recorded)
linux-azure-5.13All versions (No fix recorded)
linux-azure-5.19All versions (No fix recorded)
linux-azure-5.3All versions (No fix recorded)
linux-azure-5.4< 5.4.0-1056.58~18.04.1
linux-azure-5.8All versions (No fix recorded)
linux-azure-6.2All versions (No fix recorded)
linux-azure-edgeAll versions (No fix recorded)
linux-azure-fdeAll versions (No fix recorded)
linux-azure-fde-5.15< 5.15.0-1114.123~20.04.1
linux-azure-fde-5.19All versions (No fix recorded)
linux-azure-fde-6.2All versions (No fix recorded)
linux-azure-fips< 4.15.0-2035.39 | All versions (No fix recorded) | < 5.4.0-1073.76+fips1
linux-bluefield< 5.4.0-1019.22
linux-fipsAll versions (No fix recorded) | < 4.15.0-1069.78 | < 5.4.0-1032.37
linux-gcp< 4.15.0-1108.122~16.04.1 | All versions (No fix recorded) | < 5.4.0-1051.55
linux-gcp-4.15< 4.15.0-1108.122
linux-gcp-5.11All versions (No fix recorded)
linux-gcp-5.13All versions (No fix recorded)
linux-gcp-5.19All versions (No fix recorded)
linux-gcp-5.3All versions (No fix recorded)
linux-gcp-5.4< 5.4.0-1051.55~18.04.1
linux-gcp-5.8All versions (No fix recorded)
linux-gcp-6.2All versions (No fix recorded)
linux-gcp-fips< 4.15.0-2018.20 | All versions (No fix recorded) | < 5.4.0-1067.71~20.04.1
linux-gkeAll versions (No fix recorded)
linux-gke-4.15All versions (No fix recorded)
linux-gke-5.15All versions (No fix recorded)
linux-gke-5.4All versions (No fix recorded)
linux-gkeop< 5.4.0-1022.23
linux-gkeop-5.4All versions (No fix recorded)
linux-hwe< 4.15.0-156.163~16.04.1 | All versions (No fix recorded)
linux-hwe-5.11All versions (No fix recorded)
linux-hwe-5.13All versions (No fix recorded)
linux-hwe-5.19All versions (No fix recorded)
linux-hwe-5.4< 5.4.0-81.91~18.04.1
linux-hwe-5.8All versions (No fix recorded)
linux-hwe-6.2All versions (No fix recorded)
linux-hwe-edgeAll versions (No fix recorded)
linux-intel-5.13All versions (No fix recorded)
linux-intel-iot-realtimeAll versions (No fix recorded)
linux-kvmAll versions (No fix recorded) | < 4.15.0-1099.101 | < 5.4.0-1045.47
linux-lowlatency-hwe-5.19All versions (No fix recorded)
linux-lowlatency-hwe-6.2All versions (No fix recorded)
linux-lts-xenialAll versions (No fix recorded)
linux-nvidia-6.2All versions (No fix recorded)
linux-oemAll versions (No fix recorded)
linux-oem-5.10All versions (No fix recorded)
linux-oem-5.13All versions (No fix recorded)
linux-oem-5.14All versions (No fix recorded)
linux-oem-5.17All versions (No fix recorded)
linux-oem-5.6All versions (No fix recorded)
linux-oem-6.0All versions (No fix recorded)
linux-oem-6.1All versions (No fix recorded)
linux-oracle< 4.15.0-1080.88~16.04.1 | < 4.15.0-1080.88 | < 5.4.0-1053.57
linux-oracle-5.0All versions (No fix recorded)
linux-oracle-5.11All versions (No fix recorded)
linux-oracle-5.13All versions (No fix recorded)
linux-oracle-5.3All versions (No fix recorded)
linux-oracle-5.4< 5.4.0-1053.57~18.04.1
linux-oracle-5.8All versions (No fix recorded)
linux-raspi< 5.4.0-1042.46
linux-raspi-5.4< 5.4.0-1042.46~18.04.3
linux-raspi-realtimeAll versions (No fix recorded)
linux-raspi2All versions (No fix recorded)
linux-realtimeAll versions (No fix recorded)
linux-riscvAll versions (No fix recorded)
linux-riscv-5.11All versions (No fix recorded)
linux-riscv-5.19All versions (No fix recorded)
linux-riscv-5.8All versions (No fix recorded)
linux-starfive-5.19All versions (No fix recorded)
linux-starfive-6.2All versions (No fix recorded)

Show all 87

Linux2 products

linux≥ a900845e56617edc005fd8f35bfd5a407aaf96c8, < 958cb1078ca60d214826fd90a0961a447fade59a | ≥ a900845e56617edc005fd8f35bfd5a407aaf96c8, < 4c1fcb6ec964b44edbf84235134582a5ffae1521 | ≥ a900845e56617edc005fd8f35bfd5a407aaf96c8, < a0a37e4454ca1c0b424edc2c9c2487c2c46a1be6 | ≥ a900845e56617edc005fd8f35bfd5a407aaf96c8, < bf78e25bd3f487208e042c67c8a31706c2dba265 | ≥ a900845e56617edc005fd8f35bfd5a407aaf96c8, < 9d7d4649dc1c53acf76df260fd519db698ed20d7 | ≥ a900845e56617edc005fd8f35bfd5a407aaf96c8, < 143fc7220961220eecc04669e5909af8847bf8c8 | ≥ a900845e56617edc005fd8f35bfd5a407aaf96c8, < 6249193e03709ea625e10706ecaf17fea0427d3d | ≥ a900845e56617edc005fd8f35bfd5a407aaf96c8, < 9f6f852550d0e1b7735651228116ae9d300f69b3 | 2.6.32
linux_kernel< 4.4.273 | ≥ 4.5, < 4.9.273 | ≥ 4.10, < 4.14.237 | ≥ 4.15, < 4.19.195 | ≥ 4.20, < 5.4.126 | ≥ 5.5, < 5.10.44 | ≥ 5.11, < 5.12.11 | 5.13:rc1 | 5.13:rc2 | 5.13:rc3

Debian1 product

linux< 5.10.46-1

3 vendors · 90 products

References

12 links

git.kernel.org/stable/c/958cb1078ca60d214826fd90a0961a447fade59aREPORTPatch
git.kernel.org/stable/c/4c1fcb6ec964b44edbf84235134582a5ffae1521REPORTPatch
git.kernel.org/stable/c/a0a37e4454ca1c0b424edc2c9c2487c2c46a1be6REPORTPatch
git.kernel.org/stable/c/bf78e25bd3f487208e042c67c8a31706c2dba265REPORTPatch
git.kernel.org/stable/c/9d7d4649dc1c53acf76df260fd519db698ed20d7REPORTPatch
git.kernel.org/stable/c/143fc7220961220eecc04669e5909af8847bf8c8REPORTPatch
git.kernel.org/stable/c/6249193e03709ea625e10706ecaf17fea0427d3dREPORTPatch
git.kernel.org/stable/c/9f6f852550d0e1b7735651228116ae9d300f69b3REPORTPatch
ubuntu.com/security/CVE-2021-47284REPORT
www.cve.org/CVERecord?id=CVE-2021-47284REPORT

Show all 12 references