CVE-2024-50073 (GCVE-0-2024-50073)

Vulnerability from cvelistv5 – Published: 2024-10-29 00:50 – Updated: 2026-01-05 10:55
VLAI?
Title
tty: n_gsm: Fix use-after-free in gsm_cleanup_mux
Summary
In the Linux kernel, the following vulnerability has been resolved: tty: n_gsm: Fix use-after-free in gsm_cleanup_mux BUG: KASAN: slab-use-after-free in gsm_cleanup_mux+0x77b/0x7b0 drivers/tty/n_gsm.c:3160 [n_gsm] Read of size 8 at addr ffff88815fe99c00 by task poc/3379 CPU: 0 UID: 0 PID: 3379 Comm: poc Not tainted 6.11.0+ #56 Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 11/12/2020 Call Trace: <TASK> gsm_cleanup_mux+0x77b/0x7b0 drivers/tty/n_gsm.c:3160 [n_gsm] __pfx_gsm_cleanup_mux+0x10/0x10 drivers/tty/n_gsm.c:3124 [n_gsm] __pfx_sched_clock_cpu+0x10/0x10 kernel/sched/clock.c:389 update_load_avg+0x1c1/0x27b0 kernel/sched/fair.c:4500 __pfx_min_vruntime_cb_rotate+0x10/0x10 kernel/sched/fair.c:846 __rb_insert_augmented+0x492/0xbf0 lib/rbtree.c:161 gsmld_ioctl+0x395/0x1450 drivers/tty/n_gsm.c:3408 [n_gsm] _raw_spin_lock_irqsave+0x92/0xf0 arch/x86/include/asm/atomic.h:107 __pfx_gsmld_ioctl+0x10/0x10 drivers/tty/n_gsm.c:3822 [n_gsm] ktime_get+0x5e/0x140 kernel/time/timekeeping.c:195 ldsem_down_read+0x94/0x4e0 arch/x86/include/asm/atomic64_64.h:79 __pfx_ldsem_down_read+0x10/0x10 drivers/tty/tty_ldsem.c:338 __pfx_do_vfs_ioctl+0x10/0x10 fs/ioctl.c:805 tty_ioctl+0x643/0x1100 drivers/tty/tty_io.c:2818 Allocated by task 65: gsm_data_alloc.constprop.0+0x27/0x190 drivers/tty/n_gsm.c:926 [n_gsm] gsm_send+0x2c/0x580 drivers/tty/n_gsm.c:819 [n_gsm] gsm1_receive+0x547/0xad0 drivers/tty/n_gsm.c:3038 [n_gsm] gsmld_receive_buf+0x176/0x280 drivers/tty/n_gsm.c:3609 [n_gsm] tty_ldisc_receive_buf+0x101/0x1e0 drivers/tty/tty_buffer.c:391 tty_port_default_receive_buf+0x61/0xa0 drivers/tty/tty_port.c:39 flush_to_ldisc+0x1b0/0x750 drivers/tty/tty_buffer.c:445 process_scheduled_works+0x2b0/0x10d0 kernel/workqueue.c:3229 worker_thread+0x3dc/0x950 kernel/workqueue.c:3391 kthread+0x2a3/0x370 kernel/kthread.c:389 ret_from_fork+0x2d/0x70 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:257 Freed by task 3367: kfree+0x126/0x420 mm/slub.c:4580 gsm_cleanup_mux+0x36c/0x7b0 drivers/tty/n_gsm.c:3160 [n_gsm] gsmld_ioctl+0x395/0x1450 drivers/tty/n_gsm.c:3408 [n_gsm] tty_ioctl+0x643/0x1100 drivers/tty/tty_io.c:2818 [Analysis] gsm_msg on the tx_ctrl_list or tx_data_list of gsm_mux can be freed by multi threads through ioctl,which leads to the occurrence of uaf. Protect it by gsm tx lock.
Severity ?
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 0af021678d5d30c31f5a6b631f404ead3575212a , < bf171b5e86e41de4c1cf32fb7aefa275c3d7de49 (git)
Affected: 0af021678d5d30c31f5a6b631f404ead3575212a , < c29f192e0d44cc1cbaf698fa1ff198f63556691a (git)
Affected: 0af021678d5d30c31f5a6b631f404ead3575212a , < 0eec592c6a7460ba795d7de29f3dc95cb5422e62 (git)
Affected: 0af021678d5d30c31f5a6b631f404ead3575212a , < 9462f4ca56e7d2430fdb6dcc8498244acbfc4489 (git)
Affected: c165698c9919b000bdbe73859d3bb7b33bdb9223 (git)
Affected: 7962a4b900099cf90e02859bb297f2c618d8d940 (git)
Create a notification for this product.
    Linux Linux Affected: 6.0
Unaffected: 0 , < 6.0 (semver)
Unaffected: 6.1.114 , ≤ 6.1.* (semver)
Unaffected: 6.6.58 , ≤ 6.6.* (semver)
Unaffected: 6.11.5 , ≤ 6.11.* (semver)
Unaffected: 6.12 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html\"}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2025-11-03T22:25:08.310Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 7.8, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"HIGH\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-50073\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-12-11T14:26:06.514773Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-416\", \"description\": \"CWE-416 Use After Free\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-12-11T14:26:07.764Z\"}}], \"cna\": {\"title\": \"tty: n_gsm: Fix use-after-free 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\": \"0af021678d5d30c31f5a6b631f404ead3575212a\", \"lessThan\": \"bf171b5e86e41de4c1cf32fb7aefa275c3d7de49\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"0af021678d5d30c31f5a6b631f404ead3575212a\", \"lessThan\": \"c29f192e0d44cc1cbaf698fa1ff198f63556691a\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"0af021678d5d30c31f5a6b631f404ead3575212a\", \"lessThan\": \"0eec592c6a7460ba795d7de29f3dc95cb5422e62\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"0af021678d5d30c31f5a6b631f404ead3575212a\", \"lessThan\": \"9462f4ca56e7d2430fdb6dcc8498244acbfc4489\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"c165698c9919b000bdbe73859d3bb7b33bdb9223\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"7962a4b900099cf90e02859bb297f2c618d8d940\", \"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\": \"6.0\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"6.0\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"6.1.114\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.58\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.11.5\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.11.*\"}, {\"status\": \"unaffected\", \"version\": \"6.12\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/tty/n_gsm.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/bf171b5e86e41de4c1cf32fb7aefa275c3d7de49\"}, {\"url\": \"https://git.kernel.org/stable/c/c29f192e0d44cc1cbaf698fa1ff198f63556691a\"}, {\"url\": \"https://git.kernel.org/stable/c/0eec592c6a7460ba795d7de29f3dc95cb5422e62\"}, {\"url\": \"https://git.kernel.org/stable/c/9462f4ca56e7d2430fdb6dcc8498244acbfc4489\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\ntty: n_gsm: Fix use-after-free in gsm_cleanup_mux\\n\\nBUG: KASAN: slab-use-after-free in gsm_cleanup_mux+0x77b/0x7b0\\ndrivers/tty/n_gsm.c:3160 [n_gsm]\\nRead of size 8 at addr ffff88815fe99c00 by task poc/3379\\nCPU: 0 UID: 0 PID: 3379 Comm: poc Not tainted 6.11.0+ #56\\nHardware name: VMware, Inc. VMware Virtual Platform/440BX\\nDesktop Reference Platform, BIOS 6.00 11/12/2020\\nCall Trace:\\n \u003cTASK\u003e\\n gsm_cleanup_mux+0x77b/0x7b0 drivers/tty/n_gsm.c:3160 [n_gsm]\\n __pfx_gsm_cleanup_mux+0x10/0x10 drivers/tty/n_gsm.c:3124 [n_gsm]\\n __pfx_sched_clock_cpu+0x10/0x10 kernel/sched/clock.c:389\\n update_load_avg+0x1c1/0x27b0 kernel/sched/fair.c:4500\\n __pfx_min_vruntime_cb_rotate+0x10/0x10 kernel/sched/fair.c:846\\n __rb_insert_augmented+0x492/0xbf0 lib/rbtree.c:161\\n gsmld_ioctl+0x395/0x1450 drivers/tty/n_gsm.c:3408 [n_gsm]\\n _raw_spin_lock_irqsave+0x92/0xf0 arch/x86/include/asm/atomic.h:107\\n __pfx_gsmld_ioctl+0x10/0x10 drivers/tty/n_gsm.c:3822 [n_gsm]\\n ktime_get+0x5e/0x140 kernel/time/timekeeping.c:195\\n ldsem_down_read+0x94/0x4e0 arch/x86/include/asm/atomic64_64.h:79\\n __pfx_ldsem_down_read+0x10/0x10 drivers/tty/tty_ldsem.c:338\\n __pfx_do_vfs_ioctl+0x10/0x10 fs/ioctl.c:805\\n tty_ioctl+0x643/0x1100 drivers/tty/tty_io.c:2818\\n\\nAllocated by task 65:\\n gsm_data_alloc.constprop.0+0x27/0x190 drivers/tty/n_gsm.c:926 [n_gsm]\\n gsm_send+0x2c/0x580 drivers/tty/n_gsm.c:819 [n_gsm]\\n gsm1_receive+0x547/0xad0 drivers/tty/n_gsm.c:3038 [n_gsm]\\n gsmld_receive_buf+0x176/0x280 drivers/tty/n_gsm.c:3609 [n_gsm]\\n tty_ldisc_receive_buf+0x101/0x1e0 drivers/tty/tty_buffer.c:391\\n tty_port_default_receive_buf+0x61/0xa0 drivers/tty/tty_port.c:39\\n flush_to_ldisc+0x1b0/0x750 drivers/tty/tty_buffer.c:445\\n process_scheduled_works+0x2b0/0x10d0 kernel/workqueue.c:3229\\n worker_thread+0x3dc/0x950 kernel/workqueue.c:3391\\n kthread+0x2a3/0x370 kernel/kthread.c:389\\n ret_from_fork+0x2d/0x70 arch/x86/kernel/process.c:147\\n ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:257\\n\\nFreed by task 3367:\\n kfree+0x126/0x420 mm/slub.c:4580\\n gsm_cleanup_mux+0x36c/0x7b0 drivers/tty/n_gsm.c:3160 [n_gsm]\\n gsmld_ioctl+0x395/0x1450 drivers/tty/n_gsm.c:3408 [n_gsm]\\n tty_ioctl+0x643/0x1100 drivers/tty/tty_io.c:2818\\n\\n[Analysis]\\ngsm_msg on the tx_ctrl_list or tx_data_list of gsm_mux\\ncan be freed by multi threads through ioctl,which leads\\nto the occurrence of uaf. Protect it by gsm tx lock.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.114\", \"versionStartIncluding\": \"6.0\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.58\", \"versionStartIncluding\": \"6.0\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.11.5\", \"versionStartIncluding\": \"6.0\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12\", \"versionStartIncluding\": \"6.0\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"5.18.18\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"5.19.2\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-01-05T10:55:01.531Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-50073\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-01-05T10:55:01.531Z\", \"dateReserved\": \"2024-10-21T19:36:19.940Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-10-29T00:50:15.219Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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Sightings

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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.



Detection rules are retrieved from Rulezet.