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CVE-2026-43405: Linux, грешка в паметта

7.5

CVSS 3.1

Няма данни

Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

Няма потвърждение

Атакува се

Няма данни

Време до експлоатация

Атакува се по мрежата, без особени условия, без вход и без действие от потребителя.

CVE радар: още уязвимости от този вид

  • Експлоатация: няма данни за експлоатация
  • Атаката може да се автоматизира

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: libceph: Use u32 for non-negative values in ceph_monmap_decode() This patch fixes unnecessary implicit conversions that change signedness of blob_len and num_mon in ceph_monmap_decode(). Currently blob_len and num_mon are (signed) int variables. They are used to hold values that are always non-negative and get assigned in ceph_decode_32_safe(), which is meant to assign u32 values. Both variables are subsequently used as unsigned values, and the value of num_mon is further assigned to monmap->num_mon, which is of type u32. Therefore, both variables should be of type u32. This is especially relevant for num_mon. If the value read from the incoming message is very large, it is interpreted as a negative value, and the check for num_mon > CEPH_MAX_MON does not catch it. This leads to the attempt to allocate a very large chunk of memory for monmap, which will most likely fail. In this case, an unnecessary attempt to allocate memory is performed, and -ENOMEM is returned instead of -EINVAL.

Засегнати продукти

  • Linux Linux: a5cbd5fc22d5043a8a76e15d75d031fe24d1f69c преди ee5588e2bc41acb73f6676c0520420c107cd0140; a5cbd5fc22d5043a8a76e15d75d031fe24d1f69c преди 86f7060cd638d6eb042e8ed780fb83a59ca0dcb3; a5cbd5fc22d5043a8a76e15d75d031fe24d1f69c преди 5f2806684b05bd24d05c091083b8e2517ba8ffac; a5cbd5fc22d5043a8a76e15d75d031fe24d1f69c преди b268984ae88cb0dcd7a8e8263962c748448e26e8; a5cbd5fc22d5043a8a76e15d75d031fe24d1f69c преди ba0a4df8c563536857dcbf7b4dbd0f2a15f57ace; a5cbd5fc22d5043a8a76e15d75d031fe24d1f69c преди 08bc6173fd611ad5a40f472bf5f15b92aea0fe40; a5cbd5fc22d5043a8a76e15d75d031fe24d1f69c преди 770444611f047dbfd4517ec0bc1b179d40c2f346
  • Linux Linux: 5.11; преди 5.11; 5.15.203 до 5.15.*; 6.1.167 до 6.1.*; 6.6.130 до 6.6.*; 6.12.78 до 6.12.*; 6.18.19 до 6.18.*; 6.19.9 до 6.19.*; от 7.0 нататък

Вид слабост

История

  • 8 май 2026 Публикувано

Други уязвимости в Linux Linux

Първоизточници

CVE-2026-43405: Linux, грешка в паметта | freedomonline.bg