CWE-416
AllowedUse After Free
Abstraction: Variant · Status: Stable
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.
9821 vulnerabilities reference this CWE, most recent first.
GHSA-Q98H-HC6W-GJHG
Vulnerability from github – Published: 2024-03-11 18:31 – Updated: 2024-12-12 18:30In the Linux kernel, the following vulnerability has been resolved:
btrfs: scrub: avoid use-after-free when chunk length is not 64K aligned
[BUG] There is a bug report that, on a ext4-converted btrfs, scrub leads to various problems, including:
- "unable to find chunk map" errors BTRFS info (device vdb): scrub: started on devid 1 BTRFS critical (device vdb): unable to find chunk map for logical 2214744064 length 4096 BTRFS critical (device vdb): unable to find chunk map for logical 2214744064 length 45056
This would lead to unrepariable errors.
-
Use-after-free KASAN reports: ================================================================== BUG: KASAN: slab-use-after-free in __blk_rq_map_sg+0x18f/0x7c0 Read of size 8 at addr ffff8881013c9040 by task btrfs/909 CPU: 0 PID: 909 Comm: btrfs Not tainted 6.7.0-x64v3-dbg #11 c50636e9419a8354555555245df535e380563b2b Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 2023.11-2 12/24/2023 Call Trace: dump_stack_lvl+0x43/0x60 print_report+0xcf/0x640 kasan_report+0xa6/0xd0 __blk_rq_map_sg+0x18f/0x7c0 virtblk_prep_rq.isra.0+0x215/0x6a0 [virtio_blk 19a65eeee9ae6fcf02edfad39bb9ddee07dcdaff] virtio_queue_rqs+0xc4/0x310 [virtio_blk 19a65eeee9ae6fcf02edfad39bb9ddee07dcdaff] blk_mq_flush_plug_list.part.0+0x780/0x860 __blk_flush_plug+0x1ba/0x220 blk_finish_plug+0x3b/0x60 submit_initial_group_read+0x10a/0x290 [btrfs e57987a360bed82fe8756dcd3e0de5406ccfe965] flush_scrub_stripes+0x38e/0x430 [btrfs e57987a360bed82fe8756dcd3e0de5406ccfe965] scrub_stripe+0x82a/0xae0 [btrfs e57987a360bed82fe8756dcd3e0de5406ccfe965] scrub_chunk+0x178/0x200 [btrfs e57987a360bed82fe8756dcd3e0de5406ccfe965] scrub_enumerate_chunks+0x4bc/0xa30 [btrfs e57987a360bed82fe8756dcd3e0de5406ccfe965] btrfs_scrub_dev+0x398/0x810 [btrfs e57987a360bed82fe8756dcd3e0de5406ccfe965] btrfs_ioctl+0x4b9/0x3020 [btrfs e57987a360bed82fe8756dcd3e0de5406ccfe965] __x64_sys_ioctl+0xbd/0x100 do_syscall_64+0x5d/0xe0 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7f47e5e0952b
-
Crash, mostly due to above use-after-free
[CAUSE] The converted fs has the following data chunk layout:
item 2 key (FIRST_CHUNK_TREE CHUNK_ITEM 2214658048) itemoff 16025 itemsize 80
length 86016 owner 2 stripe_len 65536 type DATA|single
For above logical bytenr 2214744064, it's at the chunk end (2214658048 + 86016 = 2214744064).
This means btrfs_submit_bio() would split the bio, and trigger endio function for both of the two halves.
However scrub_submit_initial_read() would only expect the endio function to be called once, not any more. This means the first endio function would already free the bbio::bio, leaving the bvec freed, thus the 2nd endio call would lead to use-after-free.
[FIX] - Make sure scrub_read_endio() only updates bits in its range Since we may read less than 64K at the end of the chunk, we should not touch the bits beyond chunk boundary.
- Make sure scrub_submit_initial_read() only to read the chunk range This is done by calculating the real number of sectors we need to read, and add sector-by-sector to the bio.
Thankfully the scrub read repair path won't need extra fixes:
- scrub_stripe_submit_repair_read() With above fixes, we won't update error bit for range beyond chunk, thus scrub_stripe_submit_repair_read() should never submit any read beyond the chunk.
{
"affected": [],
"aliases": [
"CVE-2024-26616"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-03-11T18:15:19Z",
"severity": "HIGH"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: scrub: avoid use-after-free when chunk length is not 64K aligned\n\n[BUG]\nThere is a bug report that, on a ext4-converted btrfs, scrub leads to\nvarious problems, including:\n\n- \"unable to find chunk map\" errors\n BTRFS info (device vdb): scrub: started on devid 1\n BTRFS critical (device vdb): unable to find chunk map for logical 2214744064 length 4096\n BTRFS critical (device vdb): unable to find chunk map for logical 2214744064 length 45056\n\n This would lead to unrepariable errors.\n\n- Use-after-free KASAN reports:\n ==================================================================\n BUG: KASAN: slab-use-after-free in __blk_rq_map_sg+0x18f/0x7c0\n Read of size 8 at addr ffff8881013c9040 by task btrfs/909\n CPU: 0 PID: 909 Comm: btrfs Not tainted 6.7.0-x64v3-dbg #11 c50636e9419a8354555555245df535e380563b2b\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 2023.11-2 12/24/2023\n Call Trace:\n \u003cTASK\u003e\n dump_stack_lvl+0x43/0x60\n print_report+0xcf/0x640\n kasan_report+0xa6/0xd0\n __blk_rq_map_sg+0x18f/0x7c0\n virtblk_prep_rq.isra.0+0x215/0x6a0 [virtio_blk 19a65eeee9ae6fcf02edfad39bb9ddee07dcdaff]\n virtio_queue_rqs+0xc4/0x310 [virtio_blk 19a65eeee9ae6fcf02edfad39bb9ddee07dcdaff]\n blk_mq_flush_plug_list.part.0+0x780/0x860\n __blk_flush_plug+0x1ba/0x220\n blk_finish_plug+0x3b/0x60\n submit_initial_group_read+0x10a/0x290 [btrfs e57987a360bed82fe8756dcd3e0de5406ccfe965]\n flush_scrub_stripes+0x38e/0x430 [btrfs e57987a360bed82fe8756dcd3e0de5406ccfe965]\n scrub_stripe+0x82a/0xae0 [btrfs e57987a360bed82fe8756dcd3e0de5406ccfe965]\n scrub_chunk+0x178/0x200 [btrfs e57987a360bed82fe8756dcd3e0de5406ccfe965]\n scrub_enumerate_chunks+0x4bc/0xa30 [btrfs e57987a360bed82fe8756dcd3e0de5406ccfe965]\n btrfs_scrub_dev+0x398/0x810 [btrfs e57987a360bed82fe8756dcd3e0de5406ccfe965]\n btrfs_ioctl+0x4b9/0x3020 [btrfs e57987a360bed82fe8756dcd3e0de5406ccfe965]\n __x64_sys_ioctl+0xbd/0x100\n do_syscall_64+0x5d/0xe0\n entry_SYSCALL_64_after_hwframe+0x63/0x6b\n RIP: 0033:0x7f47e5e0952b\n\n- Crash, mostly due to above use-after-free\n\n[CAUSE]\nThe converted fs has the following data chunk layout:\n\n item 2 key (FIRST_CHUNK_TREE CHUNK_ITEM 2214658048) itemoff 16025 itemsize 80\n length 86016 owner 2 stripe_len 65536 type DATA|single\n\nFor above logical bytenr 2214744064, it\u0027s at the chunk end\n(2214658048 + 86016 = 2214744064).\n\nThis means btrfs_submit_bio() would split the bio, and trigger endio\nfunction for both of the two halves.\n\nHowever scrub_submit_initial_read() would only expect the endio function\nto be called once, not any more.\nThis means the first endio function would already free the bbio::bio,\nleaving the bvec freed, thus the 2nd endio call would lead to\nuse-after-free.\n\n[FIX]\n- Make sure scrub_read_endio() only updates bits in its range\n Since we may read less than 64K at the end of the chunk, we should not\n touch the bits beyond chunk boundary.\n\n- Make sure scrub_submit_initial_read() only to read the chunk range\n This is done by calculating the real number of sectors we need to\n read, and add sector-by-sector to the bio.\n\nThankfully the scrub read repair path won\u0027t need extra fixes:\n\n- scrub_stripe_submit_repair_read()\n With above fixes, we won\u0027t update error bit for range beyond chunk,\n thus scrub_stripe_submit_repair_read() should never submit any read\n beyond the chunk.",
"id": "GHSA-q98h-hc6w-gjhg",
"modified": "2024-12-12T18:30:50Z",
"published": "2024-03-11T18:31:09Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-26616"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/34de0f04684ec00c093a0455648be055f0e8e24f"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/642b9c520ef2f104277ad1f902f8526edbe087fb"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f546c4282673497a06ecb6190b50ae7f6c85b02f"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-Q98M-FJJG-RXW5
Vulnerability from github – Published: 2024-02-26 18:30 – Updated: 2024-06-27 15:30In the Linux kernel, the following vulnerability has been resolved:
drivers/amd/pm: fix a use-after-free in kv_parse_power_table
When ps allocated by kzalloc equals to NULL, kv_parse_power_table frees adev->pm.dpm.ps that allocated before. However, after the control flow goes through the following call chains:
kv_parse_power_table |-> kv_dpm_init |-> kv_dpm_sw_init |-> kv_dpm_fini
The adev->pm.dpm.ps is used in the for loop of kv_dpm_fini after its first free in kv_parse_power_table and causes a use-after-free bug.
{
"affected": [],
"aliases": [
"CVE-2023-52469"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-02-26T16:27:48Z",
"severity": "HIGH"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrivers/amd/pm: fix a use-after-free in kv_parse_power_table\n\nWhen ps allocated by kzalloc equals to NULL, kv_parse_power_table\nfrees adev-\u003epm.dpm.ps that allocated before. However, after the control\nflow goes through the following call chains:\n\nkv_parse_power_table\n |-\u003e kv_dpm_init\n |-\u003e kv_dpm_sw_init\n\t |-\u003e kv_dpm_fini\n\nThe adev-\u003epm.dpm.ps is used in the for loop of kv_dpm_fini after its\nfirst free in kv_parse_power_table and causes a use-after-free bug.",
"id": "GHSA-q98m-fjjg-rxw5",
"modified": "2024-06-27T15:30:38Z",
"published": "2024-02-26T18:30:29Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-52469"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/28dd788382c43b330480f57cd34cde0840896743"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/3426f059eacc33ecc676b0d66539297e1cfafd02"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/35fa2394d26e919f63600ce631e6aefc95ec2706"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/520e213a0b97b64735a13950e9371e0a5d7a5dc3"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/8a27d9d9fc9b5564b8904c3a77a7dea482bfa34e"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/8b55b06e737feb2a645b0293ea27e38418876d63"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/95084632a65d5c0d682a83b55935560bdcd2a1e3"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b6dcba02ee178282e0d28684d241e0b8462dea6a"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00016.html"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-Q98W-G5J8-3X6H
Vulnerability from github – Published: 2025-03-03 12:30 – Updated: 2025-03-03 12:30Memory corruption while calling the NPU driver APIs concurrently.
{
"affected": [],
"aliases": [
"CVE-2025-21424"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-03-03T11:15:15Z",
"severity": "HIGH"
},
"details": "Memory corruption while calling the NPU driver APIs concurrently.",
"id": "GHSA-q98w-g5j8-3x6h",
"modified": "2025-03-03T12:30:33Z",
"published": "2025-03-03T12:30:33Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-21424"
},
{
"type": "WEB",
"url": "https://docs.qualcomm.com/product/publicresources/securitybulletin/march-2025-bulletin.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-Q98W-PVCR-Q4MW
Vulnerability from github – Published: 2022-05-24 16:54 – Updated: 2022-05-24 16:54Adobe Acrobat and Reader versions, 2019.012.20035 and earlier, 2019.012.20035 and earlier, 2017.011.30142 and earlier, 2017.011.30143 and earlier, 2017.011.30142 and earlier, 2015.006.30497 and earlier, and 2015.006.30498 and earlier have an use after free vulnerability. Successful exploitation could lead to arbitrary code execution.
{
"affected": [],
"aliases": [
"CVE-2019-8024"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2019-08-20T20:15:00Z",
"severity": "CRITICAL"
},
"details": "Adobe Acrobat and Reader versions, 2019.012.20035 and earlier, 2019.012.20035 and earlier, 2017.011.30142 and earlier, 2017.011.30143 and earlier, 2017.011.30142 and earlier, 2015.006.30497 and earlier, and 2015.006.30498 and earlier have an use after free vulnerability. Successful exploitation could lead to arbitrary code execution.",
"id": "GHSA-q98w-pvcr-q4mw",
"modified": "2022-05-24T16:54:13Z",
"published": "2022-05-24T16:54:13Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2019-8024"
},
{
"type": "WEB",
"url": "https://helpx.adobe.com/security/products/acrobat/apsb19-41.html"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-Q993-4V6G-M56M
Vulnerability from github – Published: 2026-01-15 21:31 – Updated: 2026-04-27 18:31CWE-416: Use After Free vulnerability that could cause remote code execution when the end user imports the malicious project file (SSD file) into Rapsody.
{
"affected": [],
"aliases": [
"CVE-2025-13845"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-01-15T19:16:02Z",
"severity": "HIGH"
},
"details": "CWE-416: Use After Free vulnerability that could cause remote code execution when the end user imports the malicious project file (SSD file) into Rapsody.",
"id": "GHSA-q993-4v6g-m56m",
"modified": "2026-04-27T18:31:58Z",
"published": "2026-01-15T21:31:47Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-13845"
},
{
"type": "WEB",
"url": "https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2026-013-04\u0026p_enDocType=Security+and+Safety+Notice\u0026p_File_Name=SEVD-2026-013-04.pdf"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"type": "CVSS_V4"
}
]
}
GHSA-Q9CH-89R8-Q9W2
Vulnerability from github – Published: 2022-05-24 17:20 – Updated: 2022-05-24 17:20In multiple functions in DrmPlugin.cpp, there is a possible use after free due to a race condition. This could lead to local code execution with System execution privileges required. User interaction is not needed for exploitation.Product: AndroidVersions: Android-10Android ID: A-137878930
{
"affected": [],
"aliases": [
"CVE-2020-0126"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2020-06-11T15:15:00Z",
"severity": "MODERATE"
},
"details": "In multiple functions in DrmPlugin.cpp, there is a possible use after free due to a race condition. This could lead to local code execution with System execution privileges required. User interaction is not needed for exploitation.Product: AndroidVersions: Android-10Android ID: A-137878930",
"id": "GHSA-q9ch-89r8-q9w2",
"modified": "2022-05-24T17:20:09Z",
"published": "2022-05-24T17:20:09Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-0126"
},
{
"type": "WEB",
"url": "https://source.android.com/security/bulletin/pixel/2020-06-01"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-Q9CQ-RJ77-7RPR
Vulnerability from github – Published: 2026-06-09 18:30 – Updated: 2026-06-09 18:30Untrusted pointer dereference in Microsoft Office Word allows an unauthorized attacker to execute code locally.
{
"affected": [],
"aliases": [
"CVE-2026-45486"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-06-09T17:17:23Z",
"severity": "HIGH"
},
"details": "Untrusted pointer dereference in Microsoft Office Word allows an unauthorized attacker to execute code locally.",
"id": "GHSA-q9cq-rj77-7rpr",
"modified": "2026-06-09T18:30:50Z",
"published": "2026-06-09T18:30:50Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-45486"
},
{
"type": "WEB",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45486"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-Q9FG-RVGP-P6JG
Vulnerability from github – Published: 2024-05-08 00:31 – Updated: 2024-05-08 00:31Bentley View SKP File Parsing Use-After-Free Information Disclosure Vulnerability. This vulnerability allows remote attackers to disclose sensitive information on affected installations of Bentley View. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.
The specific flaw exists within the parsing of SKP files. The issue results from the lack of validating the existence of an object prior to performing operations on the object. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of the current process. Was ZDI-CAN-18981.
{
"affected": [],
"aliases": [
"CVE-2022-43652"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-05-07T23:15:14Z",
"severity": "LOW"
},
"details": "Bentley View SKP File Parsing Use-After-Free Information Disclosure Vulnerability. This vulnerability allows remote attackers to disclose sensitive information on affected installations of Bentley View. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.\n\nThe specific flaw exists within the parsing of SKP files. The issue results from the lack of validating the existence of an object prior to performing operations on the object. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of the current process. Was ZDI-CAN-18981.",
"id": "GHSA-q9fg-rvgp-p6jg",
"modified": "2024-05-08T00:31:15Z",
"published": "2024-05-08T00:31:15Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-43652"
},
{
"type": "WEB",
"url": "https://www.zerodayinitiative.com/advisories/ZDI-23-347"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-Q9GC-VPXV-PCMF
Vulnerability from github – Published: 2025-10-15 03:30 – Updated: 2025-10-15 03:30Animate versions 23.0.13, 24.0.10 and earlier are affected by a Use After Free vulnerability that could result in arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
{
"affected": [],
"aliases": [
"CVE-2025-54279"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-10-15T01:15:31Z",
"severity": "HIGH"
},
"details": "Animate versions 23.0.13, 24.0.10 and earlier are affected by a Use After Free vulnerability that could result in arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.",
"id": "GHSA-q9gc-vpxv-pcmf",
"modified": "2025-10-15T03:30:39Z",
"published": "2025-10-15T03:30:39Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-54279"
},
{
"type": "WEB",
"url": "https://helpx.adobe.com/security/products/animate/apsb25-97.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-Q9HJ-M4Q6-FCRH
Vulnerability from github – Published: 2025-09-18 15:30 – Updated: 2025-12-12 18:30In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: L2CAP: Fix user-after-free
This uses l2cap_chan_hold_unless_zero() after calling __l2cap_get_chan_blah() to prevent the following trace:
Bluetooth: l2cap_core.c:static void l2cap_chan_destroy(struct kref *kref) Bluetooth: chan 0000000023c4974d Bluetooth: parent 00000000ae861c08 ================================================================== BUG: KASAN: use-after-free in __mutex_waiter_is_first kernel/locking/mutex.c:191 [inline] BUG: KASAN: use-after-free in __mutex_lock_common kernel/locking/mutex.c:671 [inline] BUG: KASAN: use-after-free in __mutex_lock+0x278/0x400 kernel/locking/mutex.c:729 Read of size 8 at addr ffff888006a49b08 by task kworker/u3:2/389
{
"affected": [],
"aliases": [
"CVE-2022-50386"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-09-18T14:15:37Z",
"severity": "HIGH"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: L2CAP: Fix user-after-free\n\nThis uses l2cap_chan_hold_unless_zero() after calling\n__l2cap_get_chan_blah() to prevent the following trace:\n\nBluetooth: l2cap_core.c:static void l2cap_chan_destroy(struct kref\n*kref)\nBluetooth: chan 0000000023c4974d\nBluetooth: parent 00000000ae861c08\n==================================================================\nBUG: KASAN: use-after-free in __mutex_waiter_is_first\nkernel/locking/mutex.c:191 [inline]\nBUG: KASAN: use-after-free in __mutex_lock_common\nkernel/locking/mutex.c:671 [inline]\nBUG: KASAN: use-after-free in __mutex_lock+0x278/0x400\nkernel/locking/mutex.c:729\nRead of size 8 at addr ffff888006a49b08 by task kworker/u3:2/389",
"id": "GHSA-q9hj-m4q6-fcrh",
"modified": "2025-12-12T18:30:28Z",
"published": "2025-09-18T15:30:33Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-50386"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/0c108cf3ad386e0084277093b55a351c49e0be27"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/11e40d6c0823f699d8ad501e48d1c3ae4be386cd"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/15fc21695eb606bdc5d483b92118ee42610a952d"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/35fcbc4243aad7e7d020b7c1dfb14bb888b20a4f"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/6ffde6e03085874ae22263ff4cef4869f797e84f"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/7d6f9cb24d2b2f6b6370eac074e2e6b1bafdad45"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/843fc4e386dd84b806a7f07fb062d8c3a44e5364"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d1e894f950ad48897d1a7cb05909ea29d8c3810e"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d91fc2836562f299f34e361e089e9fe154da4f73"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
Mitigation
Strategy: Language Selection
Choose a language that provides automatic memory management.
Mitigation
Strategy: Attack Surface Reduction
When freeing pointers, be sure to set them to NULL once they are freed. However, the utilization of multiple or complex data structures may lower the usefulness of this strategy.
No CAPEC attack patterns related to this CWE.