CVE-2026-23474 (GCVE-0-2026-23474)

Vulnerability from cvelistv5 – Published: 2026-04-03 15:15 – Updated: 2026-04-03 15:15
VLAI?
Title
mtd: Avoid boot crash in RedBoot partition table parser
Summary
In the Linux kernel, the following vulnerability has been resolved: mtd: Avoid boot crash in RedBoot partition table parser Given CONFIG_FORTIFY_SOURCE=y and a recent compiler, commit 439a1bcac648 ("fortify: Use __builtin_dynamic_object_size() when available") produces the warning below and an oops. Searching for RedBoot partition table in 50000000.flash at offset 0x7e0000 ------------[ cut here ]------------ WARNING: lib/string_helpers.c:1035 at 0xc029e04c, CPU#0: swapper/0/1 memcmp: detected buffer overflow: 15 byte read of buffer size 14 Modules linked in: CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Not tainted 6.19.0 #1 NONE As Kees said, "'names' is pointing to the final 'namelen' many bytes of the allocation ... 'namelen' could be basically any length at all. This fortify warning looks legit to me -- this code used to be reading beyond the end of the allocation." Since the size of the dynamic allocation is calculated with strlen() we can use strcmp() instead of memcmp() and remain within bounds.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 0b08be5aca212a99f8ba786fee4922feac08002c (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < d8570211a2b1ec886a462daa0be4e9983ac768bb (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 2025b2d1f9d5cad6ea6fe85654c6c41297c3130b (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < c4054ad2d8bff4e8e937cd4a1d1a04c1e8f77a2c (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 75a4d8cfe7784f909b3bd69325abac8e04ecb385 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 8e2f8020270af7777d49c2e7132260983e4fc566 (git)
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    Linux Linux Affected: 2.6.12
Unaffected: 0 , < 2.6.12 (semver)
Unaffected: 6.1.167 , ≤ 6.1.* (semver)
Unaffected: 6.6.130 , ≤ 6.6.* (semver)
Unaffected: 6.12.78 , ≤ 6.12.* (semver)
Unaffected: 6.18.20 , ≤ 6.18.* (semver)
Unaffected: 6.19.10 , ≤ 6.19.* (semver)
Unaffected: 7.0-rc5 , ≤ * (original_commit_for_fix)
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmtd: Avoid boot crash in RedBoot partition table parser\n\nGiven CONFIG_FORTIFY_SOURCE=y and a recent compiler,\ncommit 439a1bcac648 (\"fortify: Use __builtin_dynamic_object_size() when\navailable\") produces the warning below and an oops.\n\n    Searching for RedBoot partition table in 50000000.flash at offset 0x7e0000\n    ------------[ cut here ]------------\n    WARNING: lib/string_helpers.c:1035 at 0xc029e04c, CPU#0: swapper/0/1\n    memcmp: detected buffer overflow: 15 byte read of buffer size 14\n    Modules linked in:\n    CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Not tainted 6.19.0 #1 NONE\n\nAs Kees said, \"\u0027names\u0027 is pointing to the final \u0027namelen\u0027 many bytes\nof the allocation ... \u0027namelen\u0027 could be basically any length at all.\nThis fortify warning looks legit to me -- this code used to be reading\nbeyond the end of the allocation.\"\n\nSince the size of the dynamic allocation is calculated with strlen()\nwe can use strcmp() instead of memcmp() and remain within bounds."
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        "dateUpdated": "2026-04-03T15:15:53.406Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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    "dateReserved": "2026-01-13T15:37:46.022Z",
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    "nvd": "{\"cve\":{\"id\":\"CVE-2026-23474\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-04-03T16:16:35.260\",\"lastModified\":\"2026-04-03T16:16:35.260\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nmtd: Avoid boot crash in RedBoot partition table parser\\n\\nGiven CONFIG_FORTIFY_SOURCE=y and a recent compiler,\\ncommit 439a1bcac648 (\\\"fortify: Use __builtin_dynamic_object_size() when\\navailable\\\") produces the warning below and an oops.\\n\\n    Searching for RedBoot partition table in 50000000.flash at offset 0x7e0000\\n    ------------[ cut here ]------------\\n    WARNING: lib/string_helpers.c:1035 at 0xc029e04c, CPU#0: swapper/0/1\\n    memcmp: detected buffer overflow: 15 byte read of buffer size 14\\n    Modules linked in:\\n    CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Not tainted 6.19.0 #1 NONE\\n\\nAs Kees said, \\\"\u0027names\u0027 is pointing to the final \u0027namelen\u0027 many bytes\\nof the allocation ... \u0027namelen\u0027 could be basically any length at all.\\nThis fortify warning looks legit to me -- this code used to be reading\\nbeyond the end of the allocation.\\\"\\n\\nSince the size of the dynamic allocation is calculated with strlen()\\nwe can use strcmp() instead of memcmp() and remain within bounds.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0b08be5aca212a99f8ba786fee4922feac08002c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/2025b2d1f9d5cad6ea6fe85654c6c41297c3130b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/75a4d8cfe7784f909b3bd69325abac8e04ecb385\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/8e2f8020270af7777d49c2e7132260983e4fc566\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c4054ad2d8bff4e8e937cd4a1d1a04c1e8f77a2c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d8570211a2b1ec886a462daa0be4e9983ac768bb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
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}


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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.
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  • 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.



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