{"id":"CVE-2024-26712","title":"In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/kasan: Fix addr error caused by page alignment\n\nIn kasan_init_region, when k_start is not page aligned, at the begin of\nfor loop, k_cur = k_start & PAGE_MASK is…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/kasan: Fix addr error caused by page alignment\n\nIn kasan_init_region, when k_start is not page aligned, at the begin of\nfor loop, k_cur = k_start & PAGE_MASK is…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 5.4, < 5.10.210","linux_kernel >= 5.11, < 5.15.149","linux_kernel >= 5.16, < 6.1.79","linux_kernel >= 6.2, < 6.6.18","linux_kernel >= 6.7, < 6.7.6","linux_kernel = 6.8","debian_linux = 10.0"],"patched":["linux_kernel 6.7.6"],"published":"2024-04-03","updated":"2026-08-04","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2024-26712","references":[{"url":"https://git.kernel.org/stable/c/0516c06b19dc64807c10e01bb99b552bdf2d7dbe","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/0c09912dd8387e228afcc5e34ac5d79b1e3a1058","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/230e89b5ad0a33f530a2a976b3e5e4385cb27882","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/2738e0aa2fb24a7ab9c878d912dc2b239738c6c6","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/4a7aee96200ad281a5cc4cf5c7a2e2a49d2b97b0","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/70ef2ba1f4286b2b73675aeb424b590c92d57b25","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/0516c06b19dc64807c10e01bb99b552bdf2d7dbe","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/0c09912dd8387e228afcc5e34ac5d79b1e3a1058","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/230e89b5ad0a33f530a2a976b3e5e4385cb27882","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/2738e0aa2fb24a7ab9c878d912dc2b239738c6c6","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/4a7aee96200ad281a5cc4cf5c7a2e2a49d2b97b0","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/70ef2ba1f4286b2b73675aeb424b590c92d57b25","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html","label":"af854a3a-2127-422b-91ae-364da2661108"}],"tags":["nvd"],"epss":0.00248,"epssPercentile":0.16432,"ingestedAt":"2026-08-05T10:46:48.174Z","slug":"CVE-2024-26712","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/kasan: Fix addr error caused by page alignment\n\nIn kasan_init_region, when k_start is not page aligned, at the begin of\nfor loop, k_cur = k_start & PAGE_MASK is less than k_start, and then\n`va = block + k_cur - k_start` is less than block, the addr va is invalid,\nbecause the memory address space from va to block is not alloced by\nmemblock_alloc, which will not be reserved by memblock_reserve later, it\nwill be used by other places.\n\nAs a result, memory overwriting occurs.\n\nfor example:\nint __init __weak kasan_init_region(void *start, size_t size)\n{\n[...]\n\t/* if say block(dcd97000) k_start(feef7400) k_end(feeff3fe) */\n\tblock = memblock_alloc(k_end - k_start, PAGE_SIZE);\n\t[...]\n\tfor (k_cur = k_start & PAGE_MASK; k_cur < k_end; k_cur += PAGE_SIZE) {\n\t\t/* at the begin of for loop\n\t\t * block(dcd97000) va(dcd96c00) k_cur(feef7000) k_start(feef7400)\n\t\t * va(dcd96c00) is less than block(dcd97000), va is invalid\n\t\t */\n\t\tvoid *va = block + k_cur - k_start;\n\t\t[...]\n\t}\n[...]\n}\n\nTherefore, page alignment is performed on k_start before\nmemblock_alloc() to ensure the validity of the VA address.\n\n## Affected\n\n- `linux_kernel >= 5.4, < 5.10.210`\n- `linux_kernel >= 5.11, < 5.15.149`\n- `linux_kernel >= 5.16, < 6.1.79`\n- `linux_kernel >= 6.2, < 6.6.18`\n- `linux_kernel >= 6.7, < 6.7.6`\n- `linux_kernel = 6.8`\n- `debian_linux = 10.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 6.7.6`","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}