CWE-476
AllowedNULL Pointer Dereference
Abstraction: Base · Status: Stable
The product dereferences a pointer that it expects to be valid but is NULL.
6340 vulnerabilities reference this CWE, most recent first.
GHSA-3F5J-23XP-RPP7
Vulnerability from github – Published: 2022-05-13 01:17 – Updated: 2022-05-13 01:17In the GetOpenCLCachedFilesDirectory function in magick/opencl.c in ImageMagick 7.0.7, a NULL pointer dereference vulnerability occurs because a memory allocation result is not checked, related to GetOpenCLCacheDirectory.
{
"affected": [],
"aliases": [
"CVE-2017-18209"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2018-03-01T21:29:00Z",
"severity": "HIGH"
},
"details": "In the GetOpenCLCachedFilesDirectory function in magick/opencl.c in ImageMagick 7.0.7, a NULL pointer dereference vulnerability occurs because a memory allocation result is not checked, related to GetOpenCLCacheDirectory.",
"id": "GHSA-3f5j-23xp-rpp7",
"modified": "2022-05-13T01:17:22Z",
"published": "2022-05-13T01:17:22Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-18209"
},
{
"type": "WEB",
"url": "https://github.com/ImageMagick/ImageMagick/issues/790"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2020/09/msg00007.html"
},
{
"type": "WEB",
"url": "https://usn.ubuntu.com/3681-1"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/103218"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-3F85-CH4H-849R
Vulnerability from github – Published: 2025-04-18 15:31 – Updated: 2025-04-29 15:31In the Linux kernel, the following vulnerability has been resolved:
x86/resctrl: Fix allocation of cleanest CLOSID on platforms with no monitors
Commit
6eac36bb9eb0 ("x86/resctrl: Allocate the cleanest CLOSID by searching closid_num_dirty_rmid")
added logic that causes resctrl to search for the CLOSID with the fewest dirty cache lines when creating a new control group, if requested by the arch code. This depends on the values read from the llc_occupancy counters. The logic is applicable to architectures where the CLOSID effectively forms part of the monitoring identifier and so do not allow complete freedom to choose an unused monitoring identifier for a given CLOSID.
This support missed that some platforms may not have these counters. This causes a NULL pointer dereference when creating a new control group as the array was not allocated by dom_data_init().
As this feature isn't necessary on platforms that don't have cache occupancy monitors, add this to the check that occurs when a new control group is allocated.
{
"affected": [],
"aliases": [
"CVE-2025-38049"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-04-18T07:15:43Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nx86/resctrl: Fix allocation of cleanest CLOSID on platforms with no monitors\n\nCommit\n\n 6eac36bb9eb0 (\"x86/resctrl: Allocate the cleanest CLOSID by searching closid_num_dirty_rmid\")\n\nadded logic that causes resctrl to search for the CLOSID with the fewest dirty\ncache lines when creating a new control group, if requested by the arch code.\nThis depends on the values read from the llc_occupancy counters. The logic is\napplicable to architectures where the CLOSID effectively forms part of the\nmonitoring identifier and so do not allow complete freedom to choose an unused\nmonitoring identifier for a given CLOSID.\n\nThis support missed that some platforms may not have these counters. This\ncauses a NULL pointer dereference when creating a new control group as the\narray was not allocated by dom_data_init().\n\nAs this feature isn\u0027t necessary on platforms that don\u0027t have cache occupancy\nmonitors, add this to the check that occurs when a new control group is\nallocated.",
"id": "GHSA-3f85-ch4h-849r",
"modified": "2025-04-29T15:31:21Z",
"published": "2025-04-18T15:31:38Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-38049"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/93a418fc61da13d1ee4047d4d1327990f7a2816a"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a121798ae669351ec0697c94f71c3a692b2a755b"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a8a1bcc27d4607227088d80483164289b5348293"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/ed5addb55e403ad6598102bcf546e068ae01fef6"
}
],
"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-3F8H-FGG5-J8HM
Vulnerability from github – Published: 2025-08-16 12:30 – Updated: 2026-01-07 18:30In the Linux kernel, the following vulnerability has been resolved:
pinctrl: qcom: msm: mark certain pins as invalid for interrupts
On some platforms, the UFS-reset pin has no interrupt logic in TLMM but
is nevertheless registered as a GPIO in the kernel. This enables the
user-space to trigger a BUG() in the pinctrl-msm driver by running, for
example: gpiomon -c 0 113 on RB2.
The exact culprit is requesting pins whose intr_detection_width setting is not 1 or 2 for interrupts. This hits a BUG() in msm_gpio_irq_set_type(). Potentially crashing the kernel due to an invalid request from user-space is not optimal, so let's go through the pins and mark those that would fail the check as invalid for the irq chip as we should not even register them as available irqs.
This function can be extended if we determine that there are more corner-cases like this.
{
"affected": [],
"aliases": [
"CVE-2025-38516"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-08-16T11:15:44Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\npinctrl: qcom: msm: mark certain pins as invalid for interrupts\n\nOn some platforms, the UFS-reset pin has no interrupt logic in TLMM but\nis nevertheless registered as a GPIO in the kernel. This enables the\nuser-space to trigger a BUG() in the pinctrl-msm driver by running, for\nexample: `gpiomon -c 0 113` on RB2.\n\nThe exact culprit is requesting pins whose intr_detection_width setting\nis not 1 or 2 for interrupts. This hits a BUG() in\nmsm_gpio_irq_set_type(). Potentially crashing the kernel due to an\ninvalid request from user-space is not optimal, so let\u0027s go through the\npins and mark those that would fail the check as invalid for the irq chip\nas we should not even register them as available irqs.\n\nThis function can be extended if we determine that there are more\ncorner-cases like this.",
"id": "GHSA-3f8h-fgg5-j8hm",
"modified": "2026-01-07T18:30:19Z",
"published": "2025-08-16T12:30:32Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-38516"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/1d57f7132662e96aace3b8a000616efde289aae1"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/275605a8b48002fe98675a5c06f3e39c09067ff2"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/3f8fc02c2582c1dfad1785e9c7bc8b4e1521af0a"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/6a89563ccf9cd0d745e2291302878a061508573f"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/93712205ce2f1fb047739494c0399a26ea4f0890"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/97c9c7daeeb00c6e1d5e84084041f79c2d2dce22"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/cb4b08a095b1fa4b3fca782757517e4e9a917d8e"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/cc145e02d6b8494c48f91958d52fa76b7e577f7b"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"
}
],
"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-3FCH-XPX6-PCR2
Vulnerability from github – Published: 2026-05-06 12:30 – Updated: 2026-05-13 21:31In the Linux kernel, the following vulnerability has been resolved:
staging: rtl8723bs: fix null dereference in find_network
The variable pwlan has the possibility of being NULL when passed into rtw_free_network_nolock() which would later dereference the variable.
{
"affected": [],
"aliases": [
"CVE-2026-43159"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-05-06T12:16:33Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nstaging: rtl8723bs: fix null dereference in find_network\n\nThe variable pwlan has the possibility of being NULL when passed into\nrtw_free_network_nolock() which would later dereference the variable.",
"id": "GHSA-3fch-xpx6-pcr2",
"modified": "2026-05-13T21:31:58Z",
"published": "2026-05-06T12:30:30Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43159"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/04d24a3654ed195485bc6346a9ef326fc494a34e"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/1aa9c59f4b96a9056c02476c7ca89e96d15e0645"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/3b1d0c9a1f78836d0bce6fdd37f596f22c19b03e"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/41460a19654c32d39fd0e3a3671cd8d4b7b8479f"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/48b4dec3a8bfd667cd0cd767eaf511176193e9a1"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/677490a6bd4c63acdf6f48e4aaf6a23d7e6a446f"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/7fa16ffed2b9d9d44940990c1f31159770769aeb"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/cc3f83b6fb3773ad943365d1cd774b4ec050332e"
}
],
"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-3FFG-FCMM-X4PP
Vulnerability from github – Published: 2025-03-12 12:30 – Updated: 2026-05-12 15:30In the Linux kernel, the following vulnerability has been resolved:
nfp: bpf: Add check for nfp_app_ctrl_msg_alloc()
Add check for the return value of nfp_app_ctrl_msg_alloc() in nfp_bpf_cmsg_alloc() to prevent null pointer dereference.
{
"affected": [],
"aliases": [
"CVE-2025-21848"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-03-12T10:15:17Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfp: bpf: Add check for nfp_app_ctrl_msg_alloc()\n\nAdd check for the return value of nfp_app_ctrl_msg_alloc() in\nnfp_bpf_cmsg_alloc() to prevent null pointer dereference.",
"id": "GHSA-3ffg-fcmm-x4pp",
"modified": "2026-05-12T15:30:51Z",
"published": "2025-03-12T12:30:58Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-21848"
},
{
"type": "WEB",
"url": "https://cert-portal.siemens.com/productcert/html/ssa-082556.html"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/1358d8e07afdf21d49ca6f00c56048442977e00a"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/29ccb1e4040da6ff02b7e64efaa2f8e6bf06020d"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/878e7b11736e062514e58f3b445ff343e6705537"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/897c32cd763fd11d0b6ed024c52f44d2475bb820"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/924b239f9704566e0d86abd894d2d64bd73c11eb"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/bd97f60750bb581f07051f98e31dfda59d3a783b"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d64c6ca420019712e194fe095b55f87363e22a9a"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e976ea6c5e1b005c64467cbf94a8577aae9c7d81"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html"
}
],
"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-3FGW-X27J-XM6W
Vulnerability from github – Published: 2024-02-27 21:31 – Updated: 2024-04-10 21:30In the Linux kernel, the following vulnerability has been resolved:
sfc: farch: fix TX queue lookup in TX flush done handling
We're starting from a TXQ instance number ('qid'), not a TXQ type, so efx_get_tx_queue() is inappropriate (and could return NULL, leading to panics).
{
"affected": [],
"aliases": [
"CVE-2021-46949"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-02-27T19:04:06Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nsfc: farch: fix TX queue lookup in TX flush done handling\n\nWe\u0027re starting from a TXQ instance number (\u0027qid\u0027), not a TXQ type, so\n efx_get_tx_queue() is inappropriate (and could return NULL, leading\n to panics).",
"id": "GHSA-3fgw-x27j-xm6w",
"modified": "2024-04-10T21:30:29Z",
"published": "2024-02-27T21:31:26Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-46949"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/5b1faa92289b53cad654123ed2bc8e10f6ddd4ac"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/98d91180748986bfb6dfb3e72765f3225719a647"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a1570985ec04116cc665b760faf666a104154170"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/fb791572d6747ef385f628450f8d57cd132e6e5a"
}
],
"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-3FQ7-8GQG-M2M9
Vulnerability from github – Published: 2022-05-24 16:56 – Updated: 2024-04-04 01:55An exploitable denial-of-service vulnerability exists in the session handling functionality of the NETGEAR N300 (WNR2000v5 with Firmware Version V1.0.0.70) HTTP server. An HTTP request with an empty User-Agent string sent to a page requiring authentication can cause a null pointer dereference, resulting in the HTTP service crashing. An unauthenticated attacker can send a specially crafted HTTP request to trigger this vulnerability.
{
"affected": [],
"aliases": [
"CVE-2019-5054"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2019-09-11T22:15:00Z",
"severity": "HIGH"
},
"details": "An exploitable denial-of-service vulnerability exists in the session handling functionality of the NETGEAR N300 (WNR2000v5 with Firmware Version V1.0.0.70) HTTP server. An HTTP request with an empty User-Agent string sent to a page requiring authentication can cause a null pointer dereference, resulting in the HTTP service crashing. An unauthenticated attacker can send a specially crafted HTTP request to trigger this vulnerability.",
"id": "GHSA-3fq7-8gqg-m2m9",
"modified": "2024-04-04T01:55:50Z",
"published": "2022-05-24T16:56:04Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2019-5054"
},
{
"type": "WEB",
"url": "https://talosintelligence.com/vulnerability_reports/TALOS-2019-0831"
}
],
"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-3FQC-QHH2-FXHG
Vulnerability from github – Published: 2022-06-29 00:00 – Updated: 2022-07-08 00:00In GPAC MP4Box 1.1.0, there is a Null pointer reference in the function gf_filter_pid_get_packet function in src/filter_core/filter_pid.c:5394, as demonstrated by GPAC. This can cause a denial of service (DOS).
{
"affected": [],
"aliases": [
"CVE-2021-40944"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2022-06-28T13:15:00Z",
"severity": "MODERATE"
},
"details": "In GPAC MP4Box 1.1.0, there is a Null pointer reference in the function gf_filter_pid_get_packet function in src/filter_core/filter_pid.c:5394, as demonstrated by GPAC. This can cause a denial of service (DOS).",
"id": "GHSA-3fqc-qhh2-fxhg",
"modified": "2022-07-08T00:00:45Z",
"published": "2022-06-29T00:00:55Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-40944"
},
{
"type": "WEB",
"url": "https://github.com/gpac/gpac/issues/1906"
},
{
"type": "WEB",
"url": "https://www.debian.org/security/2023/dsa-5411"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-3FQC-V7HH-4M8X
Vulnerability from github – Published: 2026-01-23 18:31 – Updated: 2026-07-14 15:31In the Linux kernel, the following vulnerability has been resolved:
libceph: return the handler error from mon_handle_auth_done()
Currently any error from ceph_auth_handle_reply_done() is propagated via finish_auth() but isn't returned from mon_handle_auth_done(). This results in higher layers learning that (despite the monitor considering us to be successfully authenticated) something went wrong in the authentication phase and reacting accordingly, but msgr2 still trying to proceed with establishing the session in the background. In the case of secure mode this can trigger a WARN in setup_crypto() and later lead to a NULL pointer dereference inside of prepare_auth_signature().
{
"affected": [],
"aliases": [
"CVE-2026-22992"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-01-23T16:15:55Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nlibceph: return the handler error from mon_handle_auth_done()\n\nCurrently any error from ceph_auth_handle_reply_done() is propagated\nvia finish_auth() but isn\u0027t returned from mon_handle_auth_done(). This\nresults in higher layers learning that (despite the monitor considering\nus to be successfully authenticated) something went wrong in the\nauthentication phase and reacting accordingly, but msgr2 still trying\nto proceed with establishing the session in the background. In the\ncase of secure mode this can trigger a WARN in setup_crypto() and later\nlead to a NULL pointer dereference inside of prepare_auth_signature().",
"id": "GHSA-3fqc-v7hh-4m8x",
"modified": "2026-07-14T15:31:33Z",
"published": "2026-01-23T18:31:29Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-22992"
},
{
"type": "WEB",
"url": "https://cert-portal.siemens.com/productcert/html/ssa-019113.html"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/33908769248b38a5e77cf9292817bb28e641992d"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/77229551f2cf72f3e35636db68e6a825b912cf16"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/9e0101e57534ef0e7578dd09608a6106736b82e5"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d2c4a5f6996683f287f3851ef5412797042de7f1"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e097cd858196b1914309e7e3d79b4fa79383754d"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e84b48d31b5008932c0a0902982809fbaa1d3b70"
}
],
"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-3FV7-F54H-J866
Vulnerability from github – Published: 2024-03-06 09:30 – Updated: 2025-02-14 18:30In the Linux kernel, the following vulnerability has been resolved:
pds_core: Prevent race issues involving the adminq
There are multiple paths that can result in using the pdsc's adminq.
[1] pdsc_adminq_isr and the resulting work from queue_work(), i.e. pdsc_work_thread()->pdsc_process_adminq()
[2] pdsc_adminq_post()
When the device goes through reset via PCIe reset and/or a fw_down/fw_up cycle due to bad PCIe state or bad device state the adminq is destroyed and recreated.
A NULL pointer dereference can happen if [1] or [2] happens after the adminq is already destroyed.
In order to fix this, add some further state checks and implement reference counting for adminq uses. Reference counting was used because multiple threads can attempt to access the adminq at the same time via [1] or [2]. Additionally, multiple clients (i.e. pds-vfio-pci) can be using [2] at the same time.
The adminq_refcnt is initialized to 1 when the adminq has been allocated and is ready to use. Users/clients of the adminq (i.e. [1] and [2]) will increment the refcnt when they are using the adminq. When the driver goes into a fw_down cycle it will set the PDSC_S_FW_DEAD bit and then wait for the adminq_refcnt to hit 1. Setting the PDSC_S_FW_DEAD before waiting will prevent any further adminq_refcnt increments. Waiting for the adminq_refcnt to hit 1 allows for any current users of the adminq to finish before the driver frees the adminq. Once the adminq_refcnt hits 1 the driver clears the refcnt to signify that the adminq is deleted and cannot be used. On the fw_up cycle the driver will once again initialize the adminq_refcnt to 1 allowing the adminq to be used again.
{
"affected": [],
"aliases": [
"CVE-2024-26623"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-03-06T07:15:12Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\npds_core: Prevent race issues involving the adminq\n\nThere are multiple paths that can result in using the pdsc\u0027s\nadminq.\n\n[1] pdsc_adminq_isr and the resulting work from queue_work(),\n i.e. pdsc_work_thread()-\u003epdsc_process_adminq()\n\n[2] pdsc_adminq_post()\n\nWhen the device goes through reset via PCIe reset and/or\na fw_down/fw_up cycle due to bad PCIe state or bad device\nstate the adminq is destroyed and recreated.\n\nA NULL pointer dereference can happen if [1] or [2] happens\nafter the adminq is already destroyed.\n\nIn order to fix this, add some further state checks and\nimplement reference counting for adminq uses. Reference\ncounting was used because multiple threads can attempt to\naccess the adminq at the same time via [1] or [2]. Additionally,\nmultiple clients (i.e. pds-vfio-pci) can be using [2]\nat the same time.\n\nThe adminq_refcnt is initialized to 1 when the adminq has been\nallocated and is ready to use. Users/clients of the adminq\n(i.e. [1] and [2]) will increment the refcnt when they are using\nthe adminq. When the driver goes into a fw_down cycle it will\nset the PDSC_S_FW_DEAD bit and then wait for the adminq_refcnt\nto hit 1. Setting the PDSC_S_FW_DEAD before waiting will prevent\nany further adminq_refcnt increments. Waiting for the\nadminq_refcnt to hit 1 allows for any current users of the adminq\nto finish before the driver frees the adminq. Once the\nadminq_refcnt hits 1 the driver clears the refcnt to signify that\nthe adminq is deleted and cannot be used. On the fw_up cycle the\ndriver will once again initialize the adminq_refcnt to 1 allowing\nthe adminq to be used again.",
"id": "GHSA-3fv7-f54h-j866",
"modified": "2025-02-14T18:30:45Z",
"published": "2024-03-06T09:30:29Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-26623"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/22cd6046eb2148b18990257505834dd45c672a1b"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/5939feb63ea1f011027576c64b68b681cbad31ca"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/7e82a8745b951b1e794cc780d46f3fbee5e93447"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:H/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.