Към съдържанието
Търсене

CVE-2026-64317: Linux, грешка в паметта

7.1

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 локално, без особени условия, с обикновен потребителски вход и без действие от потребителя.

CVE радар: още уязвимости от този вид

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

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: isofs: bound Rock Ridge symlink components to the SL record get_symlink_chunk() and the SL handling in parse_rock_ridge_inode_internal() walk the variable-length components of a Rock Ridge "SL" (symbolic link) record. Each component is a two-byte header (flags, len) followed by len bytes of text, so it occupies slp->len + 2 bytes. Both loops read slp->len and advance to the next component, and get_symlink_chunk() additionally does memcpy(rpnt, slp->text, slp->len), but neither checks that the component lies within the SL record before dereferencing it. A crafted SL record whose component declares a len that runs past the record (rr->len) therefore triggers an out-of-bounds read of up to 255 bytes. When the record sits at the tail of its backing buffer - for example a small kmalloc()ed continuation block reached through a CE record - the read crosses the allocation; get_symlink_chunk() then copies the out-of-bounds bytes into the symlink body returned to user space by readlink(), disclosing adjacent kernel memory. ISO 9660 images are routinely mounted from untrusted removable media - desktop environments auto-mount them (e.g. via udisks2) without CAP_SYS_ADMIN - so the record contents are attacker-controlled. Reject any component that does not fit in the remaining record bytes before using it. In get_symlink_chunk() return NULL, like the existing output-buffer (plimit) checks, so a malformed record makes readlink() fail with -EIO rather than silently returning a truncated target; in parse_rock_ridge_inode_internal() stop the inode-size walk.

Засегнати продукти

  • Linux Linux: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди 1015e1c4b2fadd9c09704e24738e46598778c869; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди 36fe7d25dbc40da0c6b1dd4513a4f69ac6164eee; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди a22cb6bb54dc167047ea9e70d97dfbc2c15649e3; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди b736b12108fd116c41777628f5a333791604df26; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди 6bf41db09ef935d76fcc84ccf213b42c18de95ee; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди b5699642640d6cff357638738c5293985cd5a53d; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди 9830725078c8483c6831ec10222ae724806ea36b; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди 5fa1d6a5ec2356d2107dead614437c66fa7138b1
  • Linux Linux: 2.6.12; преди 2.6.12; 5.10.261 до 5.10.*; 5.15.212 до 5.15.*; 6.1.178 до 6.1.*; 6.6.145 до 6.6.*; 6.12.96 до 6.12.*; 6.18.39 до 6.18.*; 7.1.4 до 7.1.*; от 7.2 нататък
  • Siemens: още 3 продукта, добавени от Siemens

    SIMATIC S7-1500 CPU 1518-4 PN/DP MFP, SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP, SIPLUS S7-1500 CPU 1518-4 PN/DP MFP

Вид слабост

История

  • 25 юли 2026 Публикувано

Други уязвимости в Linux Linux

Първоизточници