{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2024-26657",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2024-26657",
    "idYear": 2024,
    "status": "PUBLISHED",
    "publishedAt": "2024-04-02T06:08:44.329Z",
    "updatedAt": "2026-05-11T20:01:38.762Z",
    "importedAt": "2026-10-24T01:57:07.518Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "drm/sched: fix null-ptr-deref in init entity",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/sched: fix null-ptr-deref in init entity\n\nThe bug can be triggered by sending an amdgpu_cs_wait_ioctl\nto the AMDGPU DRM driver on any ASICs with valid context.\nThe bug was reported by Joonkyo Jung <joonkyoj@yonsei.ac.kr>.\nFor example the following code:\n\n    static void Syzkaller2(int fd)\n    {\n\tunion drm_amdgpu_ctx arg1;\n\tunion drm_amdgpu_wait_cs arg2;\n\n\targ1.in.op = AMDGPU_CTX_OP_ALLOC_CTX;\n\tret = drmIoctl(fd, 0x140106442 /* amdgpu_ctx_ioctl */, &arg1);\n\n\targ2.in.handle = 0x0;\n\targ2.in.timeout = 0x2000000000000;\n\targ2.in.ip_type = AMD_IP_VPE /* 0x9 */;\n\targ2->in.ip_instance = 0x0;\n\targ2.in.ring = 0x0;\n\targ2.in.ctx_id = arg1.out.alloc.ctx_id;\n\n\tdrmIoctl(fd, 0xc0206449 /* AMDGPU_WAIT_CS * /, &arg2);\n    }\n\nThe ioctl AMDGPU_WAIT_CS without previously submitted job could be assumed that\nthe error should be returned, but the following commit 1decbf6bb0b4dc56c9da6c5e57b994ebfc2be3aa\nmodified the logic and allowed to have sched_rq equal to NULL.\n\nAs a result when there is no job the ioctl AMDGPU_WAIT_CS returns success.\nThe change fixes null-ptr-deref in init entity and the stack below demonstrates\nthe error condition:\n\n[  +0.000007] BUG: kernel NULL pointer dereference, address: 0000000000000028\n[  +0.007086] #PF: supervisor read access in kernel mode\n[  +0.005234] #PF: error_code(0x0000) - not-present page\n[  +0.005232] PGD 0 P4D 0\n[  +0.002501] Oops: 0000 [#1] PREEMPT SMP KASAN NOPTI\n[  +0.005034] CPU: 10 PID: 9229 Comm: amd_basic Tainted: G    B   W    L     6.7.0+ #4\n[  +0.007797] Hardware name: ASUS System Product Name/ROG STRIX B550-F GAMING (WI-FI), BIOS 1401 12/03/2020\n[  +0.009798] RIP: 0010:drm_sched_entity_init+0x2d3/0x420 [gpu_sched]\n[  +0.006426] Code: 80 00 00 00 00 00 00 00 e8 1a 81 82 e0 49 89 9c 24 c0 00 00 00 4c 89 ef e8 4a 80 82 e0 49 8b 5d 00 48 8d 7b 28 e8 3d 80 82 e0 <48> 83 7b 28 00 0f 84 28 01 00 00 4d 8d ac 24 98 00 00 00 49 8d 5c\n[  +0.019094] RSP: 0018:ffffc90014c1fa40 EFLAGS: 00010282\n[  +0.005237] RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff8113f3fa\n[  +0.007326] RDX: fffffbfff0a7889d RSI: 0000000000000008 RDI: ffffffff853c44e0\n[  +0.007264] RBP: ffffc90014c1fa80 R08: 0000000000000001 R09: fffffbfff0a7889c\n[  +0.007266] R10: ffffffff853c44e7 R11: 0000000000000001 R12: ffff8881a719b010\n[  +0.007263] R13: ffff88810d412748 R14: 0000000000000002 R15: 0000000000000000\n[  +0.007264] FS:  00007ffff7045540(0000) GS:ffff8883cc900000(0000) knlGS:0000000000000000\n[  +0.008236] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[  +0.005851] CR2: 0000000000000028 CR3: 000000011912e000 CR4: 0000000000350ef0\n[  +0.007175] Call Trace:\n[  +0.002561]  <TASK>\n[  +0.002141]  ? show_regs+0x6a/0x80\n[  +0.003473]  ? __die+0x25/0x70\n[  +0.003124]  ? page_fault_oops+0x214/0x720\n[  +0.004179]  ? preempt_count_sub+0x18/0xc0\n[  +0.004093]  ? __pfx_page_fault_oops+0x10/0x10\n[  +0.004590]  ? srso_return_thunk+0x5/0x5f\n[  +0.004000]  ? vprintk_default+0x1d/0x30\n[  +0.004063]  ? srso_return_thunk+0x5/0x5f\n[  +0.004087]  ? vprintk+0x5c/0x90\n[  +0.003296]  ? drm_sched_entity_init+0x2d3/0x420 [gpu_sched]\n[  +0.005807]  ? srso_return_thunk+0x5/0x5f\n[  +0.004090]  ? _printk+0xb3/0xe0\n[  +0.003293]  ? __pfx__printk+0x10/0x10\n[  +0.003735]  ? asm_sysvec_apic_timer_interrupt+0x1b/0x20\n[  +0.005482]  ? do_user_addr_fault+0x345/0x770\n[  +0.004361]  ? exc_page_fault+0x64/0xf0\n[  +0.003972]  ? asm_exc_page_fault+0x27/0x30\n[  +0.004271]  ? add_taint+0x2a/0xa0\n[  +0.003476]  ? drm_sched_entity_init+0x2d3/0x420 [gpu_sched]\n[  +0.005812]  amdgpu_ctx_get_entity+0x3f9/0x770 [amdgpu]\n[  +0.009530]  ? finish_task_switch.isra.0+0x129/0x470\n[  +0.005068]  ? __pfx_amdgpu_ctx_get_entity+0x10/0x10 [amdgpu]\n[  +0.010063]  ? __kasan_check_write+0x14/0x20\n[  +0.004356]  ? srso_return_thunk+0x5/0x5f\n[  +0.004001]  ? mutex_unlock+0x81/0xd0\n[  +0.003802]  ? srso_return_thunk+0x5/0x5f\n[  +0.004096]  amdgpu_cs_wait_ioctl+0xf6/0x270 [amdgpu]\n[  +0.009355]  ? __pfx_\n---truncated---",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "56e449603f0ac580700621a356d35d5716a62ce5",
              "status": "affected",
              "versionType": "git",
              "lessThan": "74cd204c7afe498aa9dcc3ebf0ecac53d477a429"
            },
            {
              "version": "56e449603f0ac580700621a356d35d5716a62ce5",
              "status": "affected",
              "versionType": "git",
              "lessThan": "54b5b7275dfdec35812ccce70930cd7c4ee612b2"
            },
            {
              "version": "56e449603f0ac580700621a356d35d5716a62ce5",
              "status": "affected",
              "versionType": "git",
              "lessThan": "f34e8bb7d6c6626933fe993e03ed59ae85e16abb"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "6.7",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "6.7"
            },
            {
              "version": "6.7.12",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.7.*"
            },
            {
              "version": "6.8.3",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.8.*"
            },
            {
              "version": "6.9",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}