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CVE-2023-53747 (GCVE-0-2023-53747)

Vulnerability from cvelistv5 – Published: 2025-12-08 01:19 – Updated: 2026-08-05 09:15
VLAI
Title
vc_screen: reload load of struct vc_data pointer in vcs_write() to avoid UAF
Summary
In the Linux kernel, the following vulnerability has been resolved: vc_screen: reload load of struct vc_data pointer in vcs_write() to avoid UAF After a call to console_unlock() in vcs_write() the vc_data struct can be freed by vc_port_destruct(). Because of that, the struct vc_data pointer must be reloaded in the while loop in vcs_write() after console_lock() to avoid a UAF when vcs_size() is called. Syzkaller reported a UAF in vcs_size(). BUG: KASAN: slab-use-after-free in vcs_size (drivers/tty/vt/vc_screen.c:215) Read of size 4 at addr ffff8880beab89a8 by task repro_vcs_size/4119 Call Trace: <TASK> __asan_report_load4_noabort (mm/kasan/report_generic.c:380) vcs_size (drivers/tty/vt/vc_screen.c:215) vcs_write (drivers/tty/vt/vc_screen.c:664) vfs_write (fs/read_write.c:582 fs/read_write.c:564) ... <TASK> Allocated by task 1213: kmalloc_trace (mm/slab_common.c:1064) vc_allocate (./include/linux/slab.h:559 ./include/linux/slab.h:680 drivers/tty/vt/vt.c:1078 drivers/tty/vt/vt.c:1058) con_install (drivers/tty/vt/vt.c:3334) tty_init_dev (drivers/tty/tty_io.c:1303 drivers/tty/tty_io.c:1415 drivers/tty/tty_io.c:1392) tty_open (drivers/tty/tty_io.c:2082 drivers/tty/tty_io.c:2128) chrdev_open (fs/char_dev.c:415) do_dentry_open (fs/open.c:921) vfs_open (fs/open.c:1052) ... Freed by task 4116: kfree (mm/slab_common.c:1016) vc_port_destruct (drivers/tty/vt/vt.c:1044) tty_port_destructor (drivers/tty/tty_port.c:296) tty_port_put (drivers/tty/tty_port.c:312) vt_disallocate_all (drivers/tty/vt/vt_ioctl.c:662 (discriminator 2)) vt_ioctl (drivers/tty/vt/vt_ioctl.c:903) tty_ioctl (drivers/tty/tty_io.c:2778) ... The buggy address belongs to the object at ffff8880beab8800 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 424 bytes inside of freed 1024-byte region [ffff8880beab8800, ffff8880beab8c00) The buggy address belongs to the physical page: page:00000000afc77580 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xbeab8 head:00000000afc77580 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfffffc0010200(slab|head|node=0|zone=1|lastcpupid=0x1fffff) page_type: 0xffffffff() raw: 000fffffc0010200 ffff888100042dc0 ffffea000426de00 dead000000000002 raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880beab8880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880beab8900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8880beab8980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8880beab8a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880beab8a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== Disabling lock debugging due to kernel taint
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: ac751efa6a0d70f2c9daef5c7e3a92270f5c2dff , < 934de9a9b659785fed3e820bc0c813a460c71fea (git)
Affected: ac751efa6a0d70f2c9daef5c7e3a92270f5c2dff , < 0deff678157333d775af190f84696336cdcccd6d (git)
Affected: ac751efa6a0d70f2c9daef5c7e3a92270f5c2dff , < a4e3c4c65ae8510e01352c9a4347e05c035b2ce2 (git)
Affected: ac751efa6a0d70f2c9daef5c7e3a92270f5c2dff , < 11dddfbb7a4e62489b01074d6c04d9d1b42e4047 (git)
Affected: ac751efa6a0d70f2c9daef5c7e3a92270f5c2dff , < e3d1adcad5b73c7ed0c7edb35ab68abcaa45cf67 (git)
Affected: ac751efa6a0d70f2c9daef5c7e3a92270f5c2dff , < 3338d0b9acde770ee588eead5cac32c25e7048fc (git)
Affected: ac751efa6a0d70f2c9daef5c7e3a92270f5c2dff , < 1de42e7653d6714a7507ba6696151a1fa028c69f (git)
Affected: ac751efa6a0d70f2c9daef5c7e3a92270f5c2dff , < 8fb9ea65c9d1338b0d2bb0a9122dc942cdd32357 (git)
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Linux Linux Affected: 2.6.38
Unaffected: 0 , < 2.6.38 (semver)
Unaffected: 4.14.327 , ≤ 4.14.* (semver)
Unaffected: 4.19.284 , ≤ 4.19.* (semver)
Unaffected: 5.4.244 , ≤ 5.4.* (semver)
Unaffected: 5.10.181 , ≤ 5.10.* (semver)
Unaffected: 5.15.113 , ≤ 5.15.* (semver)
Unaffected: 6.1.30 , ≤ 6.1.* (semver)
Unaffected: 6.3.4 , ≤ 6.3.* (semver)
Unaffected: 6.4 , ≤ * (original_commit_for_fix)
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{
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              "version": "4.19.284",
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              "status": "unaffected",
              "version": "5.4.244",
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              "lessThanOrEqual": "5.10.*",
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              "version": "5.10.181",
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              "version": "6.4",
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                  "vulnerable": true
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvc_screen: reload load of struct vc_data pointer in vcs_write() to avoid UAF\n\nAfter a call to console_unlock() in vcs_write() the vc_data struct can be\nfreed by vc_port_destruct(). Because of that, the struct vc_data pointer\nmust be reloaded in the while loop in vcs_write() after console_lock() to\navoid a UAF when vcs_size() is called.\n\nSyzkaller reported a UAF in vcs_size().\n\nBUG: KASAN: slab-use-after-free in vcs_size (drivers/tty/vt/vc_screen.c:215)\nRead of size 4 at addr ffff8880beab89a8 by task repro_vcs_size/4119\n\nCall Trace:\n \u003cTASK\u003e\n__asan_report_load4_noabort (mm/kasan/report_generic.c:380)\nvcs_size (drivers/tty/vt/vc_screen.c:215)\nvcs_write (drivers/tty/vt/vc_screen.c:664)\nvfs_write (fs/read_write.c:582 fs/read_write.c:564)\n...\n \u003cTASK\u003e\n\nAllocated by task 1213:\nkmalloc_trace (mm/slab_common.c:1064)\nvc_allocate (./include/linux/slab.h:559 ./include/linux/slab.h:680\n    drivers/tty/vt/vt.c:1078 drivers/tty/vt/vt.c:1058)\ncon_install (drivers/tty/vt/vt.c:3334)\ntty_init_dev (drivers/tty/tty_io.c:1303 drivers/tty/tty_io.c:1415\n    drivers/tty/tty_io.c:1392)\ntty_open (drivers/tty/tty_io.c:2082 drivers/tty/tty_io.c:2128)\nchrdev_open (fs/char_dev.c:415)\ndo_dentry_open (fs/open.c:921)\nvfs_open (fs/open.c:1052)\n...\n\nFreed by task 4116:\nkfree (mm/slab_common.c:1016)\nvc_port_destruct (drivers/tty/vt/vt.c:1044)\ntty_port_destructor (drivers/tty/tty_port.c:296)\ntty_port_put (drivers/tty/tty_port.c:312)\nvt_disallocate_all (drivers/tty/vt/vt_ioctl.c:662 (discriminator 2))\nvt_ioctl (drivers/tty/vt/vt_ioctl.c:903)\ntty_ioctl (drivers/tty/tty_io.c:2778)\n...\n\nThe buggy address belongs to the object at ffff8880beab8800\n which belongs to the cache kmalloc-1k of size 1024\nThe buggy address is located 424 bytes inside of\n freed 1024-byte region [ffff8880beab8800, ffff8880beab8c00)\n\nThe buggy address belongs to the physical page:\npage:00000000afc77580 refcount:1 mapcount:0 mapping:0000000000000000\n    index:0x0 pfn:0xbeab8\nhead:00000000afc77580 order:3 entire_mapcount:0 nr_pages_mapped:0\n    pincount:0\nflags: 0xfffffc0010200(slab|head|node=0|zone=1|lastcpupid=0x1fffff)\npage_type: 0xffffffff()\nraw: 000fffffc0010200 ffff888100042dc0 ffffea000426de00 dead000000000002\nraw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000\npage dumped because: kasan: bad access detected\n\nMemory state around the buggy address:\n ffff8880beab8880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\n ffff8880beab8900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\n\u003effff8880beab8980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\n                                  ^\n ffff8880beab8a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\n ffff8880beab8a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\n==================================================================\nDisabling lock debugging due to kernel taint"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - Exploitation requires local access to character device nodes \u2014 write(2) on /dev/vcsN or /dev/vcsaN and an ioctl on a VT tty for VT_DISALLOCATE. There is no network or remote-peer reachability.\nAC:L - The attacker controls both sides of the race: one thread drives the write loop (which unconditionally drops console_lock every PAGE_SIZE chunk) while another calls VT_DISALLOCATE, and the window can be stretched indefinitely by backing the user buffer with userfaultfd or FUSE so copy_from_user stalls on demand. This makes the free-and-respray step reliable rather than opportunistic.\nPR:L - VT_DISALLOCATE carries no perm or capable() check whatsoever in vt_ioctl, so the only gate is DAC on /dev/vcs* and a VT fd \u2014 held by any tty-group member, any console-logged-in user via logind ACLs, or non-root console services on embedded systems. No capability or root privilege in the initial namespace is needed.\nUI:N - The attacker performs every step \u2014 allocating the VT, opening /dev/vcs*, issuing the write and the deallocation ioctl \u2014 from its own threads. No victim action is involved.\nS:U - The use-after-free corrupts kernel heap memory within the same kernel security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The stale vc_data is read after free (vcs_size, screenpos, vc_sw), and since the attacker can reclaim the kmalloc-1k slot with controlled data and set vc-\u003evc_origin arbitrarily, the write path\u0027s read-modify-write sequences (vcs_scr_readw on the computed pointer) yield an arbitrary kernel-memory read primitive.\nI:H - vcs_write_buf derives its destination pointer from the freed object\u0027s vc_origin/vc_visible_origin and then writes attacker-supplied 16-bit values there, giving a controlled arbitrary kernel write; the viewed path additionally makes an indirect call through vc-\u003evc_sw-\u003econ_screen_pos read out of freed memory, a direct control-flow hijack primitive leading to privilege escalation.\nA:H - Even unweaponized the bug is a slab use-after-free that reads and writes through a dangling pointer, producing KASAN splats, oopses, and kernel panics as syzkaller demonstrated, and it can be retriggered at will."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T09:15:45.787Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/934de9a9b659785fed3e820bc0c813a460c71fea"
        },
        {
          "url": "https://git.kernel.org/stable/c/0deff678157333d775af190f84696336cdcccd6d"
        },
        {
          "url": "https://git.kernel.org/stable/c/a4e3c4c65ae8510e01352c9a4347e05c035b2ce2"
        },
        {
          "url": "https://git.kernel.org/stable/c/11dddfbb7a4e62489b01074d6c04d9d1b42e4047"
        },
        {
          "url": "https://git.kernel.org/stable/c/e3d1adcad5b73c7ed0c7edb35ab68abcaa45cf67"
        },
        {
          "url": "https://git.kernel.org/stable/c/3338d0b9acde770ee588eead5cac32c25e7048fc"
        },
        {
          "url": "https://git.kernel.org/stable/c/1de42e7653d6714a7507ba6696151a1fa028c69f"
        },
        {
          "url": "https://git.kernel.org/stable/c/8fb9ea65c9d1338b0d2bb0a9122dc942cdd32357"
        }
      ],
      "title": "vc_screen: reload load of struct vc_data pointer in vcs_write() to avoid UAF",
      "x_generator": {
        "engine": "bippy-1.2.0"
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    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-53747",
    "datePublished": "2025-12-08T01:19:06.255Z",
    "dateReserved": "2025-12-08T01:18:04.279Z",
    "dateUpdated": "2026-08-05T09:15:45.787Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2023-53747",
      "date": "2026-09-14",
      "epss": "0.00139",
      "percentile": "0.03612"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2023-53747\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-12-08T02:15:50.057\",\"lastModified\":\"2026-08-04T10:19:19.547\",\"vulnStatus\":\"Deferred\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nvc_screen: reload load of struct vc_data pointer in vcs_write() to avoid UAF\\n\\nAfter a call to console_unlock() in vcs_write() the vc_data struct can be\\nfreed by vc_port_destruct(). Because of that, the struct vc_data pointer\\nmust be reloaded in the while loop in vcs_write() after console_lock() to\\navoid a UAF when vcs_size() is called.\\n\\nSyzkaller reported a UAF in vcs_size().\\n\\nBUG: KASAN: slab-use-after-free in vcs_size (drivers/tty/vt/vc_screen.c:215)\\nRead of size 4 at addr ffff8880beab89a8 by task repro_vcs_size/4119\\n\\nCall Trace:\\n \u003cTASK\u003e\\n__asan_report_load4_noabort (mm/kasan/report_generic.c:380)\\nvcs_size (drivers/tty/vt/vc_screen.c:215)\\nvcs_write (drivers/tty/vt/vc_screen.c:664)\\nvfs_write (fs/read_write.c:582 fs/read_write.c:564)\\n...\\n \u003cTASK\u003e\\n\\nAllocated by task 1213:\\nkmalloc_trace (mm/slab_common.c:1064)\\nvc_allocate (./include/linux/slab.h:559 ./include/linux/slab.h:680\\n    drivers/tty/vt/vt.c:1078 drivers/tty/vt/vt.c:1058)\\ncon_install (drivers/tty/vt/vt.c:3334)\\ntty_init_dev (drivers/tty/tty_io.c:1303 drivers/tty/tty_io.c:1415\\n    drivers/tty/tty_io.c:1392)\\ntty_open (drivers/tty/tty_io.c:2082 drivers/tty/tty_io.c:2128)\\nchrdev_open (fs/char_dev.c:415)\\ndo_dentry_open (fs/open.c:921)\\nvfs_open (fs/open.c:1052)\\n...\\n\\nFreed by task 4116:\\nkfree (mm/slab_common.c:1016)\\nvc_port_destruct (drivers/tty/vt/vt.c:1044)\\ntty_port_destructor (drivers/tty/tty_port.c:296)\\ntty_port_put (drivers/tty/tty_port.c:312)\\nvt_disallocate_all (drivers/tty/vt/vt_ioctl.c:662 (discriminator 2))\\nvt_ioctl (drivers/tty/vt/vt_ioctl.c:903)\\ntty_ioctl (drivers/tty/tty_io.c:2778)\\n...\\n\\nThe buggy address belongs to the object at ffff8880beab8800\\n which belongs to the cache kmalloc-1k of size 1024\\nThe buggy address is located 424 bytes inside of\\n freed 1024-byte region [ffff8880beab8800, ffff8880beab8c00)\\n\\nThe buggy address belongs to the physical page:\\npage:00000000afc77580 refcount:1 mapcount:0 mapping:0000000000000000\\n    index:0x0 pfn:0xbeab8\\nhead:00000000afc77580 order:3 entire_mapcount:0 nr_pages_mapped:0\\n    pincount:0\\nflags: 0xfffffc0010200(slab|head|node=0|zone=1|lastcpupid=0x1fffff)\\npage_type: 0xffffffff()\\nraw: 000fffffc0010200 ffff888100042dc0 ffffea000426de00 dead000000000002\\nraw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000\\npage dumped because: kasan: bad access detected\\n\\nMemory state around the buggy address:\\n ffff8880beab8880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\\n ffff8880beab8900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\\n\u003effff8880beab8980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\\n                                  ^\\n ffff8880beab8a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\\n ffff8880beab8a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\\n==================================================================\\nDisabling lock debugging due to kernel taint\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/tty/vt/vc_screen.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"ac751efa6a0d70f2c9daef5c7e3a92270f5c2dff\",\"lessThan\":\"934de9a9b659785fed3e820bc0c813a460c71fea\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ac751efa6a0d70f2c9daef5c7e3a92270f5c2dff\",\"lessThan\":\"0deff678157333d775af190f84696336cdcccd6d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ac751efa6a0d70f2c9daef5c7e3a92270f5c2dff\",\"lessThan\":\"a4e3c4c65ae8510e01352c9a4347e05c035b2ce2\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ac751efa6a0d70f2c9daef5c7e3a92270f5c2dff\",\"lessThan\":\"11dddfbb7a4e62489b01074d6c04d9d1b42e4047\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ac751efa6a0d70f2c9daef5c7e3a92270f5c2dff\",\"lessThan\":\"e3d1adcad5b73c7ed0c7edb35ab68abcaa45cf67\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ac751efa6a0d70f2c9daef5c7e3a92270f5c2dff\",\"lessThan\":\"3338d0b9acde770ee588eead5cac32c25e7048fc\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ac751efa6a0d70f2c9daef5c7e3a92270f5c2dff\",\"lessThan\":\"1de42e7653d6714a7507ba6696151a1fa028c69f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ac751efa6a0d70f2c9daef5c7e3a92270f5c2dff\",\"lessThan\":\"8fb9ea65c9d1338b0d2bb0a9122dc942cdd32357\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/tty/vt/vc_screen.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"2.6.38\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"2.6.38\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"4.14.327\",\"lessThanOrEqual\":\"4.14.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"4.19.284\",\"lessThanOrEqual\":\"4.19.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.4.244\",\"lessThanOrEqual\":\"5.4.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.181\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.113\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.30\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.3.4\",\"lessThanOrEqual\":\"6.3.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.4\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0deff678157333d775af190f84696336cdcccd6d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/11dddfbb7a4e62489b01074d6c04d9d1b42e4047\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/1de42e7653d6714a7507ba6696151a1fa028c69f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/3338d0b9acde770ee588eead5cac32c25e7048fc\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/8fb9ea65c9d1338b0d2bb0a9122dc942cdd32357\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/934de9a9b659785fed3e820bc0c813a460c71fea\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a4e3c4c65ae8510e01352c9a4347e05c035b2ce2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e3d1adcad5b73c7ed0c7edb35ab68abcaa45cf67\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-04T19:15:49+00:00",
      "cve": "CVE-2023-53747",
      "id": "CVE-2023-53747",
      "initial_release_date": "2023-01-01T00:00:00+00:00",
      "product_status:fixed": "280",
      "product_status:known_affected": "98",
      "product_status:known_not_affected": "98",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Linux kernel: Denial of Service via use-after-free in vc_screen",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-53747.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-11T16:46:07Z",
      "cve": "CVE-2023-53747",
      "id": "CVE-2023-53747",
      "initial_release_date": "2025-12-09T00:29:24Z",
      "product_status:known_affected": "554",
      "product_status:known_not_affected": "169",
      "product_status:recommended": "233",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2023-53747",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2023-53747.json",
      "version": "28"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

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.