fkie_cve-2024-50156
Vulnerability from fkie_nvd
Published
2024-11-07 10:15
Modified
2025-11-03 23:16
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/msm: Avoid NULL dereference in msm_disp_state_print_regs() If the allocation in msm_disp_state_dump_regs() failed then `block->state` can be NULL. The msm_disp_state_print_regs() function _does_ have code to try to handle it with: if (*reg) dump_addr = *reg; ...but since "dump_addr" is initialized to NULL the above is actually a noop. The code then goes on to dereference `dump_addr`. Make the function print "Registers not stored" when it sees a NULL to solve this. Since we're touching the code, fix msm_disp_state_print_regs() not to pointlessly take a double-pointer and properly mark the pointer as `const`. Patchwork: https://patchwork.freedesktop.org/patch/619657/
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/293f53263266bc4340d777268ab4328a97f041faPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/42cf045086feae77b212f0f66e742b91a5b566b7Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/563aa81fd66a4e7e6e551a0e02bcc23957cafe2fPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e8e9f2a12a6214080c8ea83220a596f6e1dedc6cPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f7ad916273483748582d97cfa31054ccb19224f3Patch
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 6.12
linux linux_kernel 6.12
linux linux_kernel 6.12


To clipboard 

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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/msm: Avoid NULL dereference in msm_disp_state_print_regs()\n\nIf the allocation in msm_disp_state_dump_regs() failed then\n`block-\u003estate` can be NULL. The msm_disp_state_print_regs() function\n_does_ have code to try to handle it with:\n\n  if (*reg)\n    dump_addr = *reg;\n\n...but since \"dump_addr\" is initialized to NULL the above is actually\na noop. The code then goes on to dereference `dump_addr`.\n\nMake the function print \"Registers not stored\" when it sees a NULL to\nsolve this. Since we\u0027re touching the code, fix\nmsm_disp_state_print_regs() not to pointlessly take a double-pointer\nand properly mark the pointer as `const`.\n\nPatchwork: https://patchwork.freedesktop.org/patch/619657/"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: drm/msm: Evitar la desreferenciaci\u00f3n NULL en msm_disp_state_print_regs() Si la asignaci\u00f3n en msm_disp_state_dump_regs() falla, entonces `block-\u0026gt;state` puede ser NULL. La funci\u00f3n msm_disp_state_print_regs() _s\u00ed_ tiene c\u00f3digo para intentar manejarlo con: if (*reg) dump_addr = *reg; ...pero como \"dump_addr\" se inicializa a NULL, lo anterior es en realidad un noop. Luego, el c\u00f3digo contin\u00faa para desreferenciar `dump_addr`. Haga que la funci\u00f3n imprima \"Registros no almacenados\" cuando vea un NULL para resolver esto. Ya que estamos tocando el c\u00f3digo, arregle msm_disp_state_print_regs() para que no tome un puntero doble sin sentido y marque correctamente el puntero como `const`. Parche: https://patchwork.freedesktop.org/patch/619657/"
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  "id": "CVE-2024-50156",
  "lastModified": "2025-11-03T23:16:56.663",
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          "confidentialityImpact": "NONE",
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}


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