CWE-476
AllowedNULL Pointer Dereference
Abstraction: Base · Status: Stable
The product dereferences a pointer that it expects to be valid but is NULL.
6681 vulnerabilities reference this CWE, most recent first.
GHSA-CX9F-VR2H-M23W
Vulnerability from github – Published: 2026-05-27 15:33 – Updated: 2026-06-16 03:30In the Linux kernel, the following vulnerability has been resolved:
ACPICA: Fix NULL pointer dereference in acpi_ev_address_space_dispatch()
Cover a missed execution path with a new check.
{
"affected": [],
"aliases": [
"CVE-2026-45982"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-05-27T14:17:15Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nACPICA: Fix NULL pointer dereference in acpi_ev_address_space_dispatch()\n\nCover a missed execution path with a new check.",
"id": "GHSA-cx9f-vr2h-m23w",
"modified": "2026-06-16T03:30:33Z",
"published": "2026-05-27T15:33:19Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-45982"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/56024dbe8c76cff22f53ba81a95d9efd4d0c9c44"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/7d99cbe717c1b15a66559215df32312d8cf7e525"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b24595b86920911d2b04f862422b896a0620e9ad"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/cce354524da4d10fd2c7eb835e2e4e8ab8c0ce97"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f2cf475d23b8486dfa414f7ac09f918ffd3c32a5"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f851e03bce968ff9b3faad1b616062e1244fd38d"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-CXJM-J999-J645
Vulnerability from github – Published: 2022-05-13 01:27 – Updated: 2022-05-13 01:27In Wireshark 2.6.0 to 2.6.4 and 2.4.0 to 2.4.10, the PVFS dissector could crash. This was addressed in epan/dissectors/packet-pvfs2.c by preventing a NULL pointer dereference.
{
"affected": [],
"aliases": [
"CVE-2018-19624"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2018-11-29T04:29:00Z",
"severity": "MODERATE"
},
"details": "In Wireshark 2.6.0 to 2.6.4 and 2.4.0 to 2.4.10, the PVFS dissector could crash. This was addressed in epan/dissectors/packet-pvfs2.c by preventing a NULL pointer dereference.",
"id": "GHSA-cxjm-j999-j645",
"modified": "2022-05-13T01:27:50Z",
"published": "2022-05-13T01:27:50Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-19624"
},
{
"type": "WEB",
"url": "https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=15280"
},
{
"type": "WEB",
"url": "https://code.wireshark.org/review/gitweb?p=wireshark.git;a=commit;h=3e319db1107b08fc3be804b6d449143ec9aa0dec"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2019/01/msg00010.html"
},
{
"type": "WEB",
"url": "https://www.debian.org/security/2018/dsa-4359"
},
{
"type": "WEB",
"url": "https://www.oracle.com/security-alerts/cpuapr2020.html"
},
{
"type": "WEB",
"url": "https://www.wireshark.org/security/wnpa-sec-2018-56.html"
},
{
"type": "WEB",
"url": "http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00027.html"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/106051"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-CXVJ-JX5H-9XF2
Vulnerability from github – Published: 2022-10-18 12:00 – Updated: 2022-10-18 12:00An Unchecked Return Value to NULL Pointer Dereference vulnerability in Packet Forwarding Engine (PFE) of Juniper Networks Junos OS allows an unauthenticated, network-based attacker to cause a Denial of Service (DoS). On SRX Series if Unified Threat Management (UTM) Enhanced Content Filtering (CF) and AntiVirus (AV) are enabled together and the system processes specific valid transit traffic the Packet Forwarding Engine (PFE) will crash and restart. This issue affects Juniper Networks Junos OS 21.4 versions prior to 21.4R1-S2, 21.4R2 on SRX Series. This issue does not affect Juniper Networks Junos OS versions prior to 21.4R1.
{
"affected": [],
"aliases": [
"CVE-2022-22231"
],
"database_specific": {
"cwe_ids": [
"CWE-252",
"CWE-476",
"CWE-690"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2022-10-18T03:15:00Z",
"severity": "HIGH"
},
"details": "An Unchecked Return Value to NULL Pointer Dereference vulnerability in Packet Forwarding Engine (PFE) of Juniper Networks Junos OS allows an unauthenticated, network-based attacker to cause a Denial of Service (DoS). On SRX Series if Unified Threat Management (UTM) Enhanced Content Filtering (CF) and AntiVirus (AV) are enabled together and the system processes specific valid transit traffic the Packet Forwarding Engine (PFE) will crash and restart. This issue affects Juniper Networks Junos OS 21.4 versions prior to 21.4R1-S2, 21.4R2 on SRX Series. This issue does not affect Juniper Networks Junos OS versions prior to 21.4R1.",
"id": "GHSA-cxvj-jx5h-9xf2",
"modified": "2022-10-18T12:00:30Z",
"published": "2022-10-18T12:00:30Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-22231"
},
{
"type": "WEB",
"url": "https://kb.juniper.net/JSA69885"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-F24C-2C3H-F7JX
Vulnerability from github – Published: 2026-05-26 18:31 – Updated: 2026-05-26 18:31IBM HTTP Server 8.5, and 9.0 is vulnerable to denial of service via the optional module mod_ibm_upload.
{
"affected": [],
"aliases": [
"CVE-2026-8850"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-05-26T17:16:55Z",
"severity": "HIGH"
},
"details": "IBM HTTP Server 8.5, and 9.0 is vulnerable to denial of service via the optional module mod_ibm_upload.",
"id": "GHSA-f24c-2c3h-f7jx",
"modified": "2026-05-26T18:31:48Z",
"published": "2026-05-26T18:31:48Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-8850"
},
{
"type": "WEB",
"url": "https://www.ibm.com/support/pages/node/7274065"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-F24F-2MRR-C8P6
Vulnerability from github – Published: 2022-05-17 02:55 – Updated: 2025-04-20 03:34The GraphicsStack::TGraphicsStackElement::~TGraphicsStackElement function in graphicsstack.h in PoDoFo 0.9.5 allows remote attackers to cause a denial of service (NULL pointer dereference) via a crafted file.
{
"affected": [],
"aliases": [
"CVE-2017-6841"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2017-03-15T14:59:00Z",
"severity": "MODERATE"
},
"details": "The GraphicsStack::TGraphicsStackElement::~TGraphicsStackElement function in graphicsstack.h in PoDoFo 0.9.5 allows remote attackers to cause a denial of service (NULL pointer dereference) via a crafted file.",
"id": "GHSA-f24f-2mrr-c8p6",
"modified": "2025-04-20T03:34:08Z",
"published": "2022-05-17T02:55:00Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-6841"
},
{
"type": "WEB",
"url": "https://blogs.gentoo.org/ago/2017/03/02/podofo-null-pointer-dereference-in-graphicsstacktgraphicsstackelementtgraphicsstackelement-graphicsstack-h"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-F25M-F79X-GQ3F
Vulnerability from github – Published: 2024-12-28 12:30 – Updated: 2025-01-14 18:31In the Linux kernel, the following vulnerability has been resolved:
irqchip/riscv-aplic: Prevent crash when MSI domain is missing
If the APLIC driver is probed before the IMSIC driver, the parent MSI domain will be missing, which causes a NULL pointer dereference in msi_create_device_irq_domain().
Avoid this by deferring probe until the parent MSI domain is available. Use dev_err_probe() to avoid printing an error message when returning -EPROBE_DEFER.
{
"affected": [],
"aliases": [
"CVE-2024-56682"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-12-28T10:15:10Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nirqchip/riscv-aplic: Prevent crash when MSI domain is missing\n\nIf the APLIC driver is probed before the IMSIC driver, the parent MSI\ndomain will be missing, which causes a NULL pointer dereference in\nmsi_create_device_irq_domain().\n\nAvoid this by deferring probe until the parent MSI domain is available. Use\ndev_err_probe() to avoid printing an error message when returning\n-EPROBE_DEFER.",
"id": "GHSA-f25m-f79x-gq3f",
"modified": "2025-01-14T18:31:55Z",
"published": "2024-12-28T12:30:47Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-56682"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/1f181d1cda56c2fbe379c5ace1aa1fac6306669e"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/285a07810ab3bcedc2bd380ebacbf6b4942a889a"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-F26Q-JHC2-X3H8
Vulnerability from github – Published: 2026-05-06 12:30 – Updated: 2026-05-12 21:31In the Linux kernel, the following vulnerability has been resolved:
net: ethernet: xscale: Check for PTP support properly
In ixp4xx_get_ts_info() ixp46x_ptp_find() is called unconditionally despite this feature only existing on ixp46x, leading to the following splat from tcpdump:
root@OpenWrt:~# tcpdump -vv -X -i eth0 (...) Unable to handle kernel NULL pointer dereference at virtual address 00000238 when read (...) Call trace: ptp_clock_index from ixp46x_ptp_find+0x1c/0x38 ixp46x_ptp_find from ixp4xx_get_ts_info+0x4c/0x64 ixp4xx_get_ts_info from __ethtool_get_ts_info+0x90/0x108 __ethtool_get_ts_info from __dev_ethtool+0xa00/0x2648 __dev_ethtool from dev_ethtool+0x160/0x234 dev_ethtool from dev_ioctl+0x2cc/0x460 dev_ioctl from sock_ioctl+0x1ec/0x524 sock_ioctl from sys_ioctl+0x51c/0xa94 sys_ioctl from ret_fast_syscall+0x0/0x44 (...) Segmentation fault
Check for ixp46x in ixp46x_ptp_find() before trying to set up PTP to avoid this.
To avoid altering the returned error code from ixp4xx_hwtstamp_set() which before this patch was -EOPNOTSUPP, we return -EOPNOTSUPP from ixp4xx_hwtstamp_set() if ixp46x_ptp_find() fails no matter the error code. The helper function ixp46x_ptp_find() helper returns -ENODEV.
{
"affected": [],
"aliases": [
"CVE-2026-43173"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-05-06T12:16:35Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ethernet: xscale: Check for PTP support properly\n\nIn ixp4xx_get_ts_info() ixp46x_ptp_find() is called\nunconditionally despite this feature only existing on\nixp46x, leading to the following splat from tcpdump:\n\nroot@OpenWrt:~# tcpdump -vv -X -i eth0\n(...)\nUnable to handle kernel NULL pointer dereference at virtual address\n 00000238 when read\n(...)\nCall trace:\n ptp_clock_index from ixp46x_ptp_find+0x1c/0x38\n ixp46x_ptp_find from ixp4xx_get_ts_info+0x4c/0x64\n ixp4xx_get_ts_info from __ethtool_get_ts_info+0x90/0x108\n __ethtool_get_ts_info from __dev_ethtool+0xa00/0x2648\n __dev_ethtool from dev_ethtool+0x160/0x234\n dev_ethtool from dev_ioctl+0x2cc/0x460\n dev_ioctl from sock_ioctl+0x1ec/0x524\n sock_ioctl from sys_ioctl+0x51c/0xa94\n sys_ioctl from ret_fast_syscall+0x0/0x44\n (...)\nSegmentation fault\n\nCheck for ixp46x in ixp46x_ptp_find() before trying to set up\nPTP to avoid this.\n\nTo avoid altering the returned error code from ixp4xx_hwtstamp_set()\nwhich before this patch was -EOPNOTSUPP, we return -EOPNOTSUPP\nfrom ixp4xx_hwtstamp_set() if ixp46x_ptp_find() fails no matter\nthe error code. The helper function ixp46x_ptp_find() helper\nreturns -ENODEV.",
"id": "GHSA-f26q-jhc2-x3h8",
"modified": "2026-05-12T21:31:26Z",
"published": "2026-05-06T12:30:31Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43173"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/144dde3146985b25fa84d4e4b7c3d11e0f5fc5a4"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/21d1e80d0d6e7d0c3cd8b1e001ed1fa92fb9f3f5"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/2d74412dfd3621552a394d55cc3dd26a7cbf608e"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/322437972f0a712767f6920ad34aba25f2e9b942"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/5195b10c34b8993194ad12ad7d8f54d861be084b"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/594163ea88a03bdb412063af50fc7177ef3cbeae"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/cbecebd35909f6cd0f6fb773f0fb73da99e02f8c"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-F28C-5RX3-M73F
Vulnerability from github – Published: 2023-07-12 09:30 – Updated: 2024-02-15 18:30A NULL pointer dereference vulnerability was found in netlink_dump. This issue can occur when the Netlink socket receives the message(sendmsg) for the XFRM_MSG_GETSA, XFRM_MSG_GETPOLICY type message, and the DUMP flag is set and can cause a denial of service or possibly another unspecified impact. Due to the nature of the flaw, privilege escalation cannot be fully ruled out, although it is unlikely.
{
"affected": [],
"aliases": [
"CVE-2023-3106"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2023-07-12T09:15:14Z",
"severity": "HIGH"
},
"details": "A NULL pointer dereference vulnerability was found in netlink_dump. This issue can occur when the Netlink socket receives the message(sendmsg) for the XFRM_MSG_GETSA, XFRM_MSG_GETPOLICY type message, and the DUMP flag is set and can cause a denial of service or possibly another unspecified impact. Due to the nature of the flaw, privilege escalation cannot be fully ruled out, although it is unlikely.",
"id": "GHSA-f28c-5rx3-m73f",
"modified": "2024-02-15T18:30:39Z",
"published": "2023-07-12T09:30:55Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-3106"
},
{
"type": "WEB",
"url": "https://github.com/torvalds/linux/commit/1ba5bf993c6a3142e18e68ea6452b347f9cb5635"
},
{
"type": "WEB",
"url": "https://access.redhat.com/security/cve/CVE-2023-3106"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2221501"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-F29C-HJCQ-WW2F
Vulnerability from github – Published: 2022-05-24 19:16 – Updated: 2022-05-24 19:16While fuzzing the 2.4.49 httpd, a new null pointer dereference was detected during HTTP/2 request processing, allowing an external source to DoS the server. This requires a specially crafted request. The vulnerability was recently introduced in version 2.4.49. No exploit is known to the project.
{
"affected": [],
"aliases": [
"CVE-2021-41524"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-10-05T09:15:00Z",
"severity": "HIGH"
},
"details": "While fuzzing the 2.4.49 httpd, a new null pointer dereference was detected during HTTP/2 request processing, allowing an external source to DoS the server. This requires a specially crafted request. The vulnerability was recently introduced in version 2.4.49. No exploit is known to the project.",
"id": "GHSA-f29c-hjcq-ww2f",
"modified": "2022-05-24T19:16:38Z",
"published": "2022-05-24T19:16:38Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-41524"
},
{
"type": "WEB",
"url": "https://httpd.apache.org/security/vulnerabilities_24.html"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DSM6UWQICBJ2TU727RENU3HBKEAFLT6T"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/EUVJVRJRBW5QVX4OY3NOHZDQ3B3YOTSG"
},
{
"type": "WEB",
"url": "https://security.gentoo.org/glsa/202208-20"
},
{
"type": "WEB",
"url": "https://security.netapp.com/advisory/ntap-20211029-0009"
},
{
"type": "WEB",
"url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-httpd-pathtrv-LAzg68cZ"
},
{
"type": "WEB",
"url": "https://www.oracle.com/security-alerts/cpujan2022.html"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2021/10/05/1"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-F2CF-VG85-495F
Vulnerability from github – Published: 2024-08-22 03:31 – Updated: 2024-08-27 18:31In the Linux kernel, the following vulnerability has been resolved:
iwlwifi: mvm: check debugfs_dir ptr before use
When "debugfs=off" is used on the kernel command line, iwiwifi's mvm module uses an invalid/unchecked debugfs_dir pointer and causes a BUG:
BUG: kernel NULL pointer dereference, address: 000000000000004f #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 0 P4D 0 Oops: 0000 [#1] PREEMPT SMP CPU: 1 PID: 503 Comm: modprobe Tainted: G W 5.17.0-rc5 #7 Hardware name: Dell Inc. Inspiron 15 5510/076F7Y, BIOS 2.4.1 11/05/2021 RIP: 0010:iwl_mvm_dbgfs_register+0x692/0x700 [iwlmvm] Code: 69 a0 be 80 01 00 00 48 c7 c7 50 73 6a a0 e8 95 cf ee e0 48 8b 83 b0 1e 00 00 48 c7 c2 54 73 6a a0 be 64 00 00 00 48 8d 7d 8c <48> 8b 48 50 e8 15 22 07 e1 48 8b 43 28 48 8d 55 8c 48 c7 c7 5f 73 RSP: 0018:ffffc90000a0ba68 EFLAGS: 00010246 RAX: ffffffffffffffff RBX: ffff88817d6e3328 RCX: ffff88817d6e3328 RDX: ffffffffa06a7354 RSI: 0000000000000064 RDI: ffffc90000a0ba6c RBP: ffffc90000a0bae0 R08: ffffffff824e4880 R09: ffffffffa069d620 R10: ffffc90000a0ba00 R11: ffffffffffffffff R12: 0000000000000000 R13: ffffc90000a0bb28 R14: ffff88817d6e3328 R15: ffff88817d6e3320 FS: 00007f64dd92d740(0000) GS:ffff88847f640000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000000004f CR3: 000000016fc79001 CR4: 0000000000770ee0 PKRU: 55555554 Call Trace: ? iwl_mvm_mac_setup_register+0xbdc/0xda0 [iwlmvm] iwl_mvm_start_post_nvm+0x71/0x100 [iwlmvm] iwl_op_mode_mvm_start+0xab8/0xb30 [iwlmvm] _iwl_op_mode_start+0x6f/0xd0 [iwlwifi] iwl_opmode_register+0x6a/0xe0 [iwlwifi] ? 0xffffffffa0231000 iwl_mvm_init+0x35/0x1000 [iwlmvm] ? 0xffffffffa0231000 do_one_initcall+0x5a/0x1b0 ? kmem_cache_alloc+0x1e5/0x2f0 ? do_init_module+0x1e/0x220 do_init_module+0x48/0x220 load_module+0x2602/0x2bc0 ? __kernel_read+0x145/0x2e0 ? kernel_read_file+0x229/0x290 __do_sys_finit_module+0xc5/0x130 ? __do_sys_finit_module+0xc5/0x130 __x64_sys_finit_module+0x13/0x20 do_syscall_64+0x38/0x90 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f64dda564dd Code: 5b 41 5c c3 66 0f 1f 84 00 00 00 00 00 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 1b 29 0f 00 f7 d8 64 89 01 48 RSP: 002b:00007ffdba393f88 EFLAGS: 00000246 ORIG_RAX: 0000000000000139 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f64dda564dd RDX: 0000000000000000 RSI: 00005575399e2ab2 RDI: 0000000000000001 RBP: 000055753a91c5e0 R08: 0000000000000000 R09: 0000000000000002 R10: 0000000000000001 R11: 0000000000000246 R12: 00005575399e2ab2 R13: 000055753a91ceb0 R14: 0000000000000000 R15: 000055753a923018 Modules linked in: btintel(+) btmtk bluetooth vfat snd_hda_codec_hdmi fat snd_hda_codec_realtek snd_hda_codec_generic iwlmvm(+) snd_sof_pci_intel_tgl mac80211 snd_sof_intel_hda_common soundwire_intel soundwire_generic_allocation soundwire_cadence soundwire_bus snd_sof_intel_hda snd_sof_pci snd_sof snd_sof_xtensa_dsp snd_soc_hdac_hda snd_hda_ext_core snd_soc_acpi_intel_match snd_soc_acpi snd_soc_core btrfs snd_compress snd_hda_intel snd_intel_dspcfg snd_intel_sdw_acpi snd_hda_codec raid6_pq iwlwifi snd_hda_core snd_pcm snd_timer snd soundcore cfg80211 intel_ish_ipc(+) thunderbolt rfkill intel_ishtp ucsi_acpi wmi i2c_hid_acpi i2c_hid evdev CR2: 000000000000004f ---[ end trace 0000000000000000 ]---
Check the debugfs_dir pointer for an error before using it.
[change to make both conditional]
{
"affected": [],
"aliases": [
"CVE-2022-48918"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-08-22T02:15:05Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\niwlwifi: mvm: check debugfs_dir ptr before use\n\nWhen \"debugfs=off\" is used on the kernel command line, iwiwifi\u0027s\nmvm module uses an invalid/unchecked debugfs_dir pointer and causes\na BUG:\n\n BUG: kernel NULL pointer dereference, address: 000000000000004f\n #PF: supervisor read access in kernel mode\n #PF: error_code(0x0000) - not-present page\n PGD 0 P4D 0\n Oops: 0000 [#1] PREEMPT SMP\n CPU: 1 PID: 503 Comm: modprobe Tainted: G W 5.17.0-rc5 #7\n Hardware name: Dell Inc. Inspiron 15 5510/076F7Y, BIOS 2.4.1 11/05/2021\n RIP: 0010:iwl_mvm_dbgfs_register+0x692/0x700 [iwlmvm]\n Code: 69 a0 be 80 01 00 00 48 c7 c7 50 73 6a a0 e8 95 cf ee e0 48 8b 83 b0 1e 00 00 48 c7 c2 54 73 6a a0 be 64 00 00 00 48 8d 7d 8c \u003c48\u003e 8b 48 50 e8 15 22 07 e1 48 8b 43 28 48 8d 55 8c 48 c7 c7 5f 73\n RSP: 0018:ffffc90000a0ba68 EFLAGS: 00010246\n RAX: ffffffffffffffff RBX: ffff88817d6e3328 RCX: ffff88817d6e3328\n RDX: ffffffffa06a7354 RSI: 0000000000000064 RDI: ffffc90000a0ba6c\n RBP: ffffc90000a0bae0 R08: ffffffff824e4880 R09: ffffffffa069d620\n R10: ffffc90000a0ba00 R11: ffffffffffffffff R12: 0000000000000000\n R13: ffffc90000a0bb28 R14: ffff88817d6e3328 R15: ffff88817d6e3320\n FS: 00007f64dd92d740(0000) GS:ffff88847f640000(0000) knlGS:0000000000000000\n CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n CR2: 000000000000004f CR3: 000000016fc79001 CR4: 0000000000770ee0\n PKRU: 55555554\n Call Trace:\n \u003cTASK\u003e\n ? iwl_mvm_mac_setup_register+0xbdc/0xda0 [iwlmvm]\n iwl_mvm_start_post_nvm+0x71/0x100 [iwlmvm]\n iwl_op_mode_mvm_start+0xab8/0xb30 [iwlmvm]\n _iwl_op_mode_start+0x6f/0xd0 [iwlwifi]\n iwl_opmode_register+0x6a/0xe0 [iwlwifi]\n ? 0xffffffffa0231000\n iwl_mvm_init+0x35/0x1000 [iwlmvm]\n ? 0xffffffffa0231000\n do_one_initcall+0x5a/0x1b0\n ? kmem_cache_alloc+0x1e5/0x2f0\n ? do_init_module+0x1e/0x220\n do_init_module+0x48/0x220\n load_module+0x2602/0x2bc0\n ? __kernel_read+0x145/0x2e0\n ? kernel_read_file+0x229/0x290\n __do_sys_finit_module+0xc5/0x130\n ? __do_sys_finit_module+0xc5/0x130\n __x64_sys_finit_module+0x13/0x20\n do_syscall_64+0x38/0x90\n entry_SYSCALL_64_after_hwframe+0x44/0xae\n RIP: 0033:0x7f64dda564dd\n Code: 5b 41 5c c3 66 0f 1f 84 00 00 00 00 00 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 \u003c48\u003e 3d 01 f0 ff ff 73 01 c3 48 8b 0d 1b 29 0f 00 f7 d8 64 89 01 48\n RSP: 002b:00007ffdba393f88 EFLAGS: 00000246 ORIG_RAX: 0000000000000139\n RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f64dda564dd\n RDX: 0000000000000000 RSI: 00005575399e2ab2 RDI: 0000000000000001\n RBP: 000055753a91c5e0 R08: 0000000000000000 R09: 0000000000000002\n R10: 0000000000000001 R11: 0000000000000246 R12: 00005575399e2ab2\n R13: 000055753a91ceb0 R14: 0000000000000000 R15: 000055753a923018\n \u003c/TASK\u003e\n Modules linked in: btintel(+) btmtk bluetooth vfat snd_hda_codec_hdmi fat snd_hda_codec_realtek snd_hda_codec_generic iwlmvm(+) snd_sof_pci_intel_tgl mac80211 snd_sof_intel_hda_common soundwire_intel soundwire_generic_allocation soundwire_cadence soundwire_bus snd_sof_intel_hda snd_sof_pci snd_sof snd_sof_xtensa_dsp snd_soc_hdac_hda snd_hda_ext_core snd_soc_acpi_intel_match snd_soc_acpi snd_soc_core btrfs snd_compress snd_hda_intel snd_intel_dspcfg snd_intel_sdw_acpi snd_hda_codec raid6_pq iwlwifi snd_hda_core snd_pcm snd_timer snd soundcore cfg80211 intel_ish_ipc(+) thunderbolt rfkill intel_ishtp ucsi_acpi wmi i2c_hid_acpi i2c_hid evdev\n CR2: 000000000000004f\n ---[ end trace 0000000000000000 ]---\n\nCheck the debugfs_dir pointer for an error before using it.\n\n[change to make both conditional]",
"id": "GHSA-f2cf-vg85-495f",
"modified": "2024-08-27T18:31:36Z",
"published": "2024-08-22T03:31:34Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-48918"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/5a6248c0a22352f09ea041665d3bd3e18f6f872c"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/7de1ed755e1ace30d97a724bad32452ed86b653b"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/fe51975ff13831e794e1bcd0039b305dcad3d7ba"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
Mitigation MIT-56
For any pointers that could have been modified or provided from a function that can return NULL, check the pointer for NULL before use. When working with a multithreaded or otherwise asynchronous environment, ensure that proper locking APIs are used to lock before the check, and unlock when it has finished [REF-1484].
Mitigation
Select a programming language that is not susceptible to these issues.
Mitigation
Check the results of all functions that return a value and verify that the value is non-null before acting upon it.
Mitigation
Identify all variables and data stores that receive information from external sources, and apply input validation to make sure that they are only initialized to expected values.
Mitigation
Explicitly initialize all variables and other data stores, either during declaration or just before the first usage.
No CAPEC attack patterns related to this CWE.