CVE-2024-26712 (GCVE-0-2024-26712)

Vulnerability from cvelistv5 – Published: 2024-04-03 14:55 – Updated: 2025-05-07 20:00
VLAI?
Title
powerpc/kasan: Fix addr error caused by page alignment
Summary
In the Linux kernel, the following vulnerability has been resolved: powerpc/kasan: Fix addr error caused by page alignment In kasan_init_region, when k_start is not page aligned, at the begin of for loop, k_cur = k_start & PAGE_MASK is less than k_start, and then `va = block + k_cur - k_start` is less than block, the addr va is invalid, because the memory address space from va to block is not alloced by memblock_alloc, which will not be reserved by memblock_reserve later, it will be used by other places. As a result, memory overwriting occurs. for example: int __init __weak kasan_init_region(void *start, size_t size) { [...] /* if say block(dcd97000) k_start(feef7400) k_end(feeff3fe) */ block = memblock_alloc(k_end - k_start, PAGE_SIZE); [...] for (k_cur = k_start & PAGE_MASK; k_cur < k_end; k_cur += PAGE_SIZE) { /* at the begin of for loop * block(dcd97000) va(dcd96c00) k_cur(feef7000) k_start(feef7400) * va(dcd96c00) is less than block(dcd97000), va is invalid */ void *va = block + k_cur - k_start; [...] } [...] } Therefore, page alignment is performed on k_start before memblock_alloc() to ensure the validity of the VA address.
Severity ?
4.4 (Medium)
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
CWE
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 663c0c9496a69f80011205ba3194049bcafd681d , < 230e89b5ad0a33f530a2a976b3e5e4385cb27882 (git)
Affected: 663c0c9496a69f80011205ba3194049bcafd681d , < 2738e0aa2fb24a7ab9c878d912dc2b239738c6c6 (git)
Affected: 663c0c9496a69f80011205ba3194049bcafd681d , < 0c09912dd8387e228afcc5e34ac5d79b1e3a1058 (git)
Affected: 663c0c9496a69f80011205ba3194049bcafd681d , < 0516c06b19dc64807c10e01bb99b552bdf2d7dbe (git)
Affected: 663c0c9496a69f80011205ba3194049bcafd681d , < 70ef2ba1f4286b2b73675aeb424b590c92d57b25 (git)
Affected: 663c0c9496a69f80011205ba3194049bcafd681d , < 4a7aee96200ad281a5cc4cf5c7a2e2a49d2b97b0 (git)
Affected: 5ce93076d8ee2a0fac3ad4adbd2e91b6197146db (git)
Create a notification for this product.
    Linux Linux Affected: 5.4
Unaffected: 0 , < 5.4 (semver)
Unaffected: 5.10.210 , ≤ 5.10.* (semver)
Unaffected: 5.15.149 , ≤ 5.15.* (semver)
Unaffected: 6.1.79 , ≤ 6.1.* (semver)
Unaffected: 6.6.18 , ≤ 6.6.* (semver)
Unaffected: 6.7.6 , ≤ 6.7.* (semver)
Unaffected: 6.8 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
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\"https://git.kernel.org/stable/c/70ef2ba1f4286b2b73675aeb424b590c92d57b25\"}, {\"url\": \"https://git.kernel.org/stable/c/4a7aee96200ad281a5cc4cf5c7a2e2a49d2b97b0\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"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 \u0026 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 \u0026 PAGE_MASK; k_cur \u003c 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.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.210\", \"versionStartIncluding\": \"5.4\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.149\", \"versionStartIncluding\": \"5.4\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.79\", \"versionStartIncluding\": \"5.4\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.18\", \"versionStartIncluding\": \"5.4\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.7.6\", \"versionStartIncluding\": \"5.4\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.8\", \"versionStartIncluding\": \"5.4\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"5.3.6\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T08:54:38.326Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-26712\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-05-04T08:54:38.326Z\", \"dateReserved\": \"2024-02-19T14:20:24.159Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-04-03T14:55:14.149Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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Sightings

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.