CVE-2023-54241 (GCVE-0-2023-54241)

Vulnerability from cvelistv5 – Published: 2025-12-30 12:11 – Updated: 2026-05-11 19:58
VLAI?
Title
MIPS: KVM: Fix NULL pointer dereference
Summary
In the Linux kernel, the following vulnerability has been resolved: MIPS: KVM: Fix NULL pointer dereference After commit 45c7e8af4a5e3f0bea4ac209 ("MIPS: Remove KVM_TE support") we get a NULL pointer dereference when creating a KVM guest: [ 146.243409] Starting KVM with MIPS VZ extensions [ 149.849151] CPU 3 Unable to handle kernel paging request at virtual address 0000000000000300, epc == ffffffffc06356ec, ra == ffffffffc063568c [ 149.849177] Oops[#1]: [ 149.849182] CPU: 3 PID: 2265 Comm: qemu-system-mip Not tainted 6.4.0-rc3+ #1671 [ 149.849188] Hardware name: THTF CX TL630 Series/THTF-LS3A4000-7A1000-ML4A, BIOS KL4.1F.TF.D.166.201225.R 12/25/2020 [ 149.849192] $ 0 : 0000000000000000 000000007400cce0 0000000000400004 ffffffff8119c740 [ 149.849209] $ 4 : 000000007400cce1 000000007400cce1 0000000000000000 0000000000000000 [ 149.849221] $ 8 : 000000240058bb36 ffffffff81421ac0 0000000000000000 0000000000400dc0 [ 149.849233] $12 : 9800000102a07cc8 ffffffff80e40e38 0000000000000001 0000000000400dc0 [ 149.849245] $16 : 0000000000000000 9800000106cd0000 9800000106cd0000 9800000100cce000 [ 149.849257] $20 : ffffffffc0632b28 ffffffffc05b31b0 9800000100ccca00 0000000000400000 [ 149.849269] $24 : 9800000106cd09ce ffffffff802f69d0 [ 149.849281] $28 : 9800000102a04000 9800000102a07cd0 98000001106a8000 ffffffffc063568c [ 149.849293] Hi : 00000335b2111e66 [ 149.849295] Lo : 6668d90061ae0ae9 [ 149.849298] epc : ffffffffc06356ec kvm_vz_vcpu_setup+0xc4/0x328 [kvm] [ 149.849324] ra : ffffffffc063568c kvm_vz_vcpu_setup+0x64/0x328 [kvm] [ 149.849336] Status: 7400cce3 KX SX UX KERNEL EXL IE [ 149.849351] Cause : 1000000c (ExcCode 03) [ 149.849354] BadVA : 0000000000000300 [ 149.849357] PrId : 0014c004 (ICT Loongson-3) [ 149.849360] Modules linked in: kvm nfnetlink_queue nfnetlink_log nfnetlink fuse sha256_generic libsha256 cfg80211 rfkill binfmt_misc vfat fat snd_hda_codec_hdmi input_leds led_class snd_hda_intel snd_intel_dspcfg snd_hda_codec snd_hda_core snd_pcm snd_timer snd serio_raw xhci_pci radeon drm_suballoc_helper drm_display_helper xhci_hcd ip_tables x_tables [ 149.849432] Process qemu-system-mip (pid: 2265, threadinfo=00000000ae2982d2, task=0000000038e09ad4, tls=000000ffeba16030) [ 149.849439] Stack : 9800000000000003 9800000100ccca00 9800000100ccc000 ffffffffc062cef4 [ 149.849453] 9800000102a07d18 c89b63a7ab338e00 0000000000000000 ffffffff811a0000 [ 149.849465] 0000000000000000 9800000106cd0000 ffffffff80e59938 98000001106a8920 [ 149.849476] ffffffff80e57f30 ffffffffc062854c ffffffff811a0000 9800000102bf4240 [ 149.849488] ffffffffc05b0000 ffffffff80e3a798 000000ff78000000 000000ff78000010 [ 149.849500] 0000000000000255 98000001021f7de0 98000001023f0078 ffffffff81434000 [ 149.849511] 0000000000000000 0000000000000000 9800000102ae0000 980000025e92ae28 [ 149.849523] 0000000000000000 c89b63a7ab338e00 0000000000000001 ffffffff8119dce0 [ 149.849535] 000000ff78000010 ffffffff804f3d3c 9800000102a07eb0 0000000000000255 [ 149.849546] 0000000000000000 ffffffff8049460c 000000ff78000010 0000000000000255 [ 149.849558] ... [ 149.849565] Call Trace: [ 149.849567] [<ffffffffc06356ec>] kvm_vz_vcpu_setup+0xc4/0x328 [kvm] [ 149.849586] [<ffffffffc062cef4>] kvm_arch_vcpu_create+0x184/0x228 [kvm] [ 149.849605] [<ffffffffc062854c>] kvm_vm_ioctl+0x64c/0xf28 [kvm] [ 149.849623] [<ffffffff805209c0>] sys_ioctl+0xc8/0x118 [ 149.849631] [<ffffffff80219eb0>] syscall_common+0x34/0x58 The root cause is the deletion of kvm_mips_commpage_init() leaves vcpu ->arch.cop0 NULL. So fix it by making cop0 from a pointer to an embedded object.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 45c7e8af4a5e3f0bea4ac209eea34118dd57ac64 , < cd517f9a9d07d41f4f3593b1da3982261e09d162 (git)
Affected: 45c7e8af4a5e3f0bea4ac209eea34118dd57ac64 , < bd9cf2a5f9e1b2229ad22f21de6f6ad1a9c8858e (git)
Affected: 45c7e8af4a5e3f0bea4ac209eea34118dd57ac64 , < 6b9fb255d53759e3ea9b30067cb55091df1caf06 (git)
Affected: 45c7e8af4a5e3f0bea4ac209eea34118dd57ac64 , < e4de2057698636c0ee709e545d19b169d2069fa3 (git)
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    Linux Linux Affected: 5.13
Unaffected: 0 , < 5.13 (semver)
Unaffected: 5.15.121 , ≤ 5.15.* (semver)
Unaffected: 6.1.40 , ≤ 6.1.* (semver)
Unaffected: 6.4.5 , ≤ 6.4.* (semver)
Unaffected: 6.5 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/mips/include/asm/kvm_host.h",
            "arch/mips/kvm/emulate.c",
            "arch/mips/kvm/mips.c",
            "arch/mips/kvm/trace.h",
            "arch/mips/kvm/vz.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "cd517f9a9d07d41f4f3593b1da3982261e09d162",
              "status": "affected",
              "version": "45c7e8af4a5e3f0bea4ac209eea34118dd57ac64",
              "versionType": "git"
            },
            {
              "lessThan": "bd9cf2a5f9e1b2229ad22f21de6f6ad1a9c8858e",
              "status": "affected",
              "version": "45c7e8af4a5e3f0bea4ac209eea34118dd57ac64",
              "versionType": "git"
            },
            {
              "lessThan": "6b9fb255d53759e3ea9b30067cb55091df1caf06",
              "status": "affected",
              "version": "45c7e8af4a5e3f0bea4ac209eea34118dd57ac64",
              "versionType": "git"
            },
            {
              "lessThan": "e4de2057698636c0ee709e545d19b169d2069fa3",
              "status": "affected",
              "version": "45c7e8af4a5e3f0bea4ac209eea34118dd57ac64",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "arch/mips/include/asm/kvm_host.h",
            "arch/mips/kvm/emulate.c",
            "arch/mips/kvm/mips.c",
            "arch/mips/kvm/trace.h",
            "arch/mips/kvm/vz.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.13"
            },
            {
              "lessThan": "5.13",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.121",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.40",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.4.*",
              "status": "unaffected",
              "version": "6.4.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.5",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.121",
                  "versionStartIncluding": "5.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.40",
                  "versionStartIncluding": "5.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.4.5",
                  "versionStartIncluding": "5.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.5",
                  "versionStartIncluding": "5.13",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nMIPS: KVM: Fix NULL pointer dereference\n\nAfter commit 45c7e8af4a5e3f0bea4ac209 (\"MIPS: Remove KVM_TE support\") we\nget a NULL pointer dereference when creating a KVM guest:\n\n[  146.243409] Starting KVM with MIPS VZ extensions\n[  149.849151] CPU 3 Unable to handle kernel paging request at virtual address 0000000000000300, epc == ffffffffc06356ec, ra == ffffffffc063568c\n[  149.849177] Oops[#1]:\n[  149.849182] CPU: 3 PID: 2265 Comm: qemu-system-mip Not tainted 6.4.0-rc3+ #1671\n[  149.849188] Hardware name: THTF CX TL630 Series/THTF-LS3A4000-7A1000-ML4A, BIOS KL4.1F.TF.D.166.201225.R 12/25/2020\n[  149.849192] $ 0   : 0000000000000000 000000007400cce0 0000000000400004 ffffffff8119c740\n[  149.849209] $ 4   : 000000007400cce1 000000007400cce1 0000000000000000 0000000000000000\n[  149.849221] $ 8   : 000000240058bb36 ffffffff81421ac0 0000000000000000 0000000000400dc0\n[  149.849233] $12   : 9800000102a07cc8 ffffffff80e40e38 0000000000000001 0000000000400dc0\n[  149.849245] $16   : 0000000000000000 9800000106cd0000 9800000106cd0000 9800000100cce000\n[  149.849257] $20   : ffffffffc0632b28 ffffffffc05b31b0 9800000100ccca00 0000000000400000\n[  149.849269] $24   : 9800000106cd09ce ffffffff802f69d0\n[  149.849281] $28   : 9800000102a04000 9800000102a07cd0 98000001106a8000 ffffffffc063568c\n[  149.849293] Hi    : 00000335b2111e66\n[  149.849295] Lo    : 6668d90061ae0ae9\n[  149.849298] epc   : ffffffffc06356ec kvm_vz_vcpu_setup+0xc4/0x328 [kvm]\n[  149.849324] ra    : ffffffffc063568c kvm_vz_vcpu_setup+0x64/0x328 [kvm]\n[  149.849336] Status: 7400cce3 KX SX UX KERNEL EXL IE\n[  149.849351] Cause : 1000000c (ExcCode 03)\n[  149.849354] BadVA : 0000000000000300\n[  149.849357] PrId  : 0014c004 (ICT Loongson-3)\n[  149.849360] Modules linked in: kvm nfnetlink_queue nfnetlink_log nfnetlink fuse sha256_generic libsha256 cfg80211 rfkill binfmt_misc vfat fat snd_hda_codec_hdmi input_leds led_class snd_hda_intel snd_intel_dspcfg snd_hda_codec snd_hda_core snd_pcm snd_timer snd serio_raw xhci_pci radeon drm_suballoc_helper drm_display_helper xhci_hcd ip_tables x_tables\n[  149.849432] Process qemu-system-mip (pid: 2265, threadinfo=00000000ae2982d2, task=0000000038e09ad4, tls=000000ffeba16030)\n[  149.849439] Stack : 9800000000000003 9800000100ccca00 9800000100ccc000 ffffffffc062cef4\n[  149.849453]         9800000102a07d18 c89b63a7ab338e00 0000000000000000 ffffffff811a0000\n[  149.849465]         0000000000000000 9800000106cd0000 ffffffff80e59938 98000001106a8920\n[  149.849476]         ffffffff80e57f30 ffffffffc062854c ffffffff811a0000 9800000102bf4240\n[  149.849488]         ffffffffc05b0000 ffffffff80e3a798 000000ff78000000 000000ff78000010\n[  149.849500]         0000000000000255 98000001021f7de0 98000001023f0078 ffffffff81434000\n[  149.849511]         0000000000000000 0000000000000000 9800000102ae0000 980000025e92ae28\n[  149.849523]         0000000000000000 c89b63a7ab338e00 0000000000000001 ffffffff8119dce0\n[  149.849535]         000000ff78000010 ffffffff804f3d3c 9800000102a07eb0 0000000000000255\n[  149.849546]         0000000000000000 ffffffff8049460c 000000ff78000010 0000000000000255\n[  149.849558]         ...\n[  149.849565] Call Trace:\n[  149.849567] [\u003cffffffffc06356ec\u003e] kvm_vz_vcpu_setup+0xc4/0x328 [kvm]\n[  149.849586] [\u003cffffffffc062cef4\u003e] kvm_arch_vcpu_create+0x184/0x228 [kvm]\n[  149.849605] [\u003cffffffffc062854c\u003e] kvm_vm_ioctl+0x64c/0xf28 [kvm]\n[  149.849623] [\u003cffffffff805209c0\u003e] sys_ioctl+0xc8/0x118\n[  149.849631] [\u003cffffffff80219eb0\u003e] syscall_common+0x34/0x58\n\nThe root cause is the deletion of kvm_mips_commpage_init() leaves vcpu\n-\u003earch.cop0 NULL. So fix it by making cop0 from a pointer to an embedded\nobject."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T19:58:10.970Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/cd517f9a9d07d41f4f3593b1da3982261e09d162"
        },
        {
          "url": "https://git.kernel.org/stable/c/bd9cf2a5f9e1b2229ad22f21de6f6ad1a9c8858e"
        },
        {
          "url": "https://git.kernel.org/stable/c/6b9fb255d53759e3ea9b30067cb55091df1caf06"
        },
        {
          "url": "https://git.kernel.org/stable/c/e4de2057698636c0ee709e545d19b169d2069fa3"
        }
      ],
      "title": "MIPS: KVM: Fix NULL pointer dereference",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-54241",
    "datePublished": "2025-12-30T12:11:29.726Z",
    "dateReserved": "2025-12-30T12:06:44.509Z",
    "dateUpdated": "2026-05-11T19:58:10.970Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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  • 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.
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  • 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.