CVE-2023-52564 (GCVE-0-2023-52564)
Vulnerability from cvelistv5 – Published: 2024-03-02 21:59 – Updated: 2025-05-04 12:49
VLAI?
Title
Revert "tty: n_gsm: fix UAF in gsm_cleanup_mux"
Summary
In the Linux kernel, the following vulnerability has been resolved:
Revert "tty: n_gsm: fix UAF in gsm_cleanup_mux"
This reverts commit 9b9c8195f3f0d74a826077fc1c01b9ee74907239.
The commit above is reverted as it did not solve the original issue.
gsm_cleanup_mux() tries to free up the virtual ttys by calling
gsm_dlci_release() for each available DLCI. There, dlci_put() is called to
decrease the reference counter for the DLCI via tty_port_put() which
finally calls gsm_dlci_free(). This already clears the pointer which is
being checked in gsm_cleanup_mux() before calling gsm_dlci_release().
Therefore, it is not necessary to clear this pointer in gsm_cleanup_mux()
as done in the reverted commit. The commit introduces a null pointer
dereference:
<TASK>
? __die+0x1f/0x70
? page_fault_oops+0x156/0x420
? search_exception_tables+0x37/0x50
? fixup_exception+0x21/0x310
? exc_page_fault+0x69/0x150
? asm_exc_page_fault+0x26/0x30
? tty_port_put+0x19/0xa0
gsmtty_cleanup+0x29/0x80 [n_gsm]
release_one_tty+0x37/0xe0
process_one_work+0x1e6/0x3e0
worker_thread+0x4c/0x3d0
? __pfx_worker_thread+0x10/0x10
kthread+0xe1/0x110
? __pfx_kthread+0x10/0x10
ret_from_fork+0x2f/0x50
? __pfx_kthread+0x10/0x10
ret_from_fork_asm+0x1b/0x30
</TASK>
The actual issue is that nothing guards dlci_put() from being called
multiple times while the tty driver was triggered but did not yet finished
calling gsm_dlci_free().
Severity ?
No CVSS data available.
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Affected:
8fc0eabaa73bbd9bd705577071564616da5c8c61 , < 6d5c8862932d31a810b6545f7d69ecc124402c6e
(git)
Affected: 5138c228311a863c3cf937b94a3ab4c87f1f70c4 , < a48d2bcd23f2c98d575bc2f9b7a3fbd16aeea9eb (git) Affected: 9615ca54bc138e35353a001e8b5d4824dce72188 , < c61d0b87a7028c2c10faffc524d748334c7b9827 (git) Affected: 9b9c8195f3f0d74a826077fc1c01b9ee74907239 , < 2bff660e0ff349dee84dc4f6f6d10da4497f5b28 (git) Affected: 9b9c8195f3f0d74a826077fc1c01b9ee74907239 , < 29346e217b8ab8a52889b88f00b268278d6b7668 (git) Affected: 74a8d6f50cc90ed0061997db51dfa81a62b0f835 (git) |
||
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2023-52564",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2024-03-07T20:09:41.921733Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2024-07-05T17:21:06.965Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
},
{
"providerMetadata": {
"dateUpdated": "2024-08-02T23:03:20.987Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"x_transferred"
],
"url": "https://git.kernel.org/stable/c/6d5c8862932d31a810b6545f7d69ecc124402c6e"
},
{
"tags": [
"x_transferred"
],
"url": "https://git.kernel.org/stable/c/a48d2bcd23f2c98d575bc2f9b7a3fbd16aeea9eb"
},
{
"tags": [
"x_transferred"
],
"url": "https://git.kernel.org/stable/c/c61d0b87a7028c2c10faffc524d748334c7b9827"
},
{
"tags": [
"x_transferred"
],
"url": "https://git.kernel.org/stable/c/2bff660e0ff349dee84dc4f6f6d10da4497f5b28"
},
{
"tags": [
"x_transferred"
],
"url": "https://git.kernel.org/stable/c/29346e217b8ab8a52889b88f00b268278d6b7668"
}
],
"title": "CVE Program Container"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/tty/n_gsm.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "6d5c8862932d31a810b6545f7d69ecc124402c6e",
"status": "affected",
"version": "8fc0eabaa73bbd9bd705577071564616da5c8c61",
"versionType": "git"
},
{
"lessThan": "a48d2bcd23f2c98d575bc2f9b7a3fbd16aeea9eb",
"status": "affected",
"version": "5138c228311a863c3cf937b94a3ab4c87f1f70c4",
"versionType": "git"
},
{
"lessThan": "c61d0b87a7028c2c10faffc524d748334c7b9827",
"status": "affected",
"version": "9615ca54bc138e35353a001e8b5d4824dce72188",
"versionType": "git"
},
{
"lessThan": "2bff660e0ff349dee84dc4f6f6d10da4497f5b28",
"status": "affected",
"version": "9b9c8195f3f0d74a826077fc1c01b9ee74907239",
"versionType": "git"
},
{
"lessThan": "29346e217b8ab8a52889b88f00b268278d6b7668",
"status": "affected",
"version": "9b9c8195f3f0d74a826077fc1c01b9ee74907239",
"versionType": "git"
},
{
"status": "affected",
"version": "74a8d6f50cc90ed0061997db51dfa81a62b0f835",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/tty/n_gsm.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "6.5"
},
{
"lessThan": "6.5",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.198",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.134",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.56",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.5.*",
"status": "unaffected",
"version": "6.5.6",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.6",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.10.198",
"versionStartIncluding": "5.10.190",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.15.134",
"versionStartIncluding": "5.15.124",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.56",
"versionStartIncluding": "6.1.43",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.5.6",
"versionStartIncluding": "6.5",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.6",
"versionStartIncluding": "6.5",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "6.4.8",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRevert \"tty: n_gsm: fix UAF in gsm_cleanup_mux\"\n\nThis reverts commit 9b9c8195f3f0d74a826077fc1c01b9ee74907239.\n\nThe commit above is reverted as it did not solve the original issue.\n\ngsm_cleanup_mux() tries to free up the virtual ttys by calling\ngsm_dlci_release() for each available DLCI. There, dlci_put() is called to\ndecrease the reference counter for the DLCI via tty_port_put() which\nfinally calls gsm_dlci_free(). This already clears the pointer which is\nbeing checked in gsm_cleanup_mux() before calling gsm_dlci_release().\nTherefore, it is not necessary to clear this pointer in gsm_cleanup_mux()\nas done in the reverted commit. The commit introduces a null pointer\ndereference:\n \u003cTASK\u003e\n ? __die+0x1f/0x70\n ? page_fault_oops+0x156/0x420\n ? search_exception_tables+0x37/0x50\n ? fixup_exception+0x21/0x310\n ? exc_page_fault+0x69/0x150\n ? asm_exc_page_fault+0x26/0x30\n ? tty_port_put+0x19/0xa0\n gsmtty_cleanup+0x29/0x80 [n_gsm]\n release_one_tty+0x37/0xe0\n process_one_work+0x1e6/0x3e0\n worker_thread+0x4c/0x3d0\n ? __pfx_worker_thread+0x10/0x10\n kthread+0xe1/0x110\n ? __pfx_kthread+0x10/0x10\n ret_from_fork+0x2f/0x50\n ? __pfx_kthread+0x10/0x10\n ret_from_fork_asm+0x1b/0x30\n \u003c/TASK\u003e\n\nThe actual issue is that nothing guards dlci_put() from being called\nmultiple times while the tty driver was triggered but did not yet finished\ncalling gsm_dlci_free()."
}
],
"providerMetadata": {
"dateUpdated": "2025-05-04T12:49:15.207Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/6d5c8862932d31a810b6545f7d69ecc124402c6e"
},
{
"url": "https://git.kernel.org/stable/c/a48d2bcd23f2c98d575bc2f9b7a3fbd16aeea9eb"
},
{
"url": "https://git.kernel.org/stable/c/c61d0b87a7028c2c10faffc524d748334c7b9827"
},
{
"url": "https://git.kernel.org/stable/c/2bff660e0ff349dee84dc4f6f6d10da4497f5b28"
},
{
"url": "https://git.kernel.org/stable/c/29346e217b8ab8a52889b88f00b268278d6b7668"
}
],
"title": "Revert \"tty: n_gsm: fix UAF in gsm_cleanup_mux\"",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2023-52564",
"datePublished": "2024-03-02T21:59:36.867Z",
"dateReserved": "2024-03-02T21:55:42.567Z",
"dateUpdated": "2025-05-04T12:49:15.207Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1",
"vulnerability-lookup:meta": {
"vulnrichment": {
"containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/6d5c8862932d31a810b6545f7d69ecc124402c6e\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/a48d2bcd23f2c98d575bc2f9b7a3fbd16aeea9eb\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/c61d0b87a7028c2c10faffc524d748334c7b9827\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/2bff660e0ff349dee84dc4f6f6d10da4497f5b28\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/29346e217b8ab8a52889b88f00b268278d6b7668\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-02T23:03:20.987Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2023-52564\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-03-07T20:09:41.921733Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-07-05T15:20:37.900Z\"}}], \"cna\": {\"title\": \"Revert \\\"tty: n_gsm: fix UAF in gsm_cleanup_mux\\\"\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"8fc0eabaa73bbd9bd705577071564616da5c8c61\", \"lessThan\": \"6d5c8862932d31a810b6545f7d69ecc124402c6e\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"5138c228311a863c3cf937b94a3ab4c87f1f70c4\", \"lessThan\": \"a48d2bcd23f2c98d575bc2f9b7a3fbd16aeea9eb\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"9615ca54bc138e35353a001e8b5d4824dce72188\", \"lessThan\": \"c61d0b87a7028c2c10faffc524d748334c7b9827\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"9b9c8195f3f0d74a826077fc1c01b9ee74907239\", \"lessThan\": \"2bff660e0ff349dee84dc4f6f6d10da4497f5b28\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"9b9c8195f3f0d74a826077fc1c01b9ee74907239\", \"lessThan\": \"29346e217b8ab8a52889b88f00b268278d6b7668\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"74a8d6f50cc90ed0061997db51dfa81a62b0f835\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/tty/n_gsm.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"6.5\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"6.5\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.10.198\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.134\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.56\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.5.6\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.5.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/tty/n_gsm.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/6d5c8862932d31a810b6545f7d69ecc124402c6e\"}, {\"url\": \"https://git.kernel.org/stable/c/a48d2bcd23f2c98d575bc2f9b7a3fbd16aeea9eb\"}, {\"url\": \"https://git.kernel.org/stable/c/c61d0b87a7028c2c10faffc524d748334c7b9827\"}, {\"url\": \"https://git.kernel.org/stable/c/2bff660e0ff349dee84dc4f6f6d10da4497f5b28\"}, {\"url\": \"https://git.kernel.org/stable/c/29346e217b8ab8a52889b88f00b268278d6b7668\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nRevert \\\"tty: n_gsm: fix UAF in gsm_cleanup_mux\\\"\\n\\nThis reverts commit 9b9c8195f3f0d74a826077fc1c01b9ee74907239.\\n\\nThe commit above is reverted as it did not solve the original issue.\\n\\ngsm_cleanup_mux() tries to free up the virtual ttys by calling\\ngsm_dlci_release() for each available DLCI. There, dlci_put() is called to\\ndecrease the reference counter for the DLCI via tty_port_put() which\\nfinally calls gsm_dlci_free(). This already clears the pointer which is\\nbeing checked in gsm_cleanup_mux() before calling gsm_dlci_release().\\nTherefore, it is not necessary to clear this pointer in gsm_cleanup_mux()\\nas done in the reverted commit. The commit introduces a null pointer\\ndereference:\\n \u003cTASK\u003e\\n ? __die+0x1f/0x70\\n ? page_fault_oops+0x156/0x420\\n ? search_exception_tables+0x37/0x50\\n ? fixup_exception+0x21/0x310\\n ? exc_page_fault+0x69/0x150\\n ? asm_exc_page_fault+0x26/0x30\\n ? tty_port_put+0x19/0xa0\\n gsmtty_cleanup+0x29/0x80 [n_gsm]\\n release_one_tty+0x37/0xe0\\n process_one_work+0x1e6/0x3e0\\n worker_thread+0x4c/0x3d0\\n ? __pfx_worker_thread+0x10/0x10\\n kthread+0xe1/0x110\\n ? __pfx_kthread+0x10/0x10\\n ret_from_fork+0x2f/0x50\\n ? __pfx_kthread+0x10/0x10\\n ret_from_fork_asm+0x1b/0x30\\n \u003c/TASK\u003e\\n\\nThe actual issue is that nothing guards dlci_put() from being called\\nmultiple times while the tty driver was triggered but did not yet finished\\ncalling gsm_dlci_free().\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.198\", \"versionStartIncluding\": \"5.10.190\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.134\", \"versionStartIncluding\": \"5.15.124\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.56\", \"versionStartIncluding\": \"6.1.43\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.5.6\", \"versionStartIncluding\": \"6.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6\", \"versionStartIncluding\": \"6.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"6.4.8\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T12:49:15.207Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2023-52564\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-05-04T12:49:15.207Z\", \"dateReserved\": \"2024-03-02T21:55:42.567Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-03-02T21:59:36.867Z\", \"assignerShortName\": \"Linux\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
}
}
Loading…
Loading…
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Loading…
Loading…