gsd-2024-26884
Vulnerability from gsd
Modified
2024-02-20 06:02
Details
In the Linux kernel, the following vulnerability has been resolved:
bpf: Fix hashtab overflow check on 32-bit arches
The hashtab code relies on roundup_pow_of_two() to compute the number of
hash buckets, and contains an overflow check by checking if the
resulting value is 0. However, on 32-bit arches, the roundup code itself
can overflow by doing a 32-bit left-shift of an unsigned long value,
which is undefined behaviour, so it is not guaranteed to truncate
neatly. This was triggered by syzbot on the DEVMAP_HASH type, which
contains the same check, copied from the hashtab code. So apply the same
fix to hashtab, by moving the overflow check to before the roundup.
Aliases
{ "gsd": { "metadata": { "exploitCode": "unknown", "remediation": "unknown", "reportConfidence": "confirmed", "type": "vulnerability" }, "osvSchema": { "aliases": [ "CVE-2024-26884" ], "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix hashtab overflow check on 32-bit arches\n\nThe hashtab code relies on roundup_pow_of_two() to compute the number of\nhash buckets, and contains an overflow check by checking if the\nresulting value is 0. However, on 32-bit arches, the roundup code itself\ncan overflow by doing a 32-bit left-shift of an unsigned long value,\nwhich is undefined behaviour, so it is not guaranteed to truncate\nneatly. This was triggered by syzbot on the DEVMAP_HASH type, which\ncontains the same check, copied from the hashtab code. So apply the same\nfix to hashtab, by moving the overflow check to before the roundup.", "id": "GSD-2024-26884", "modified": "2024-02-20T06:02:29.303152Z", "schema_version": "1.4.0" } }, "namespaces": { "cve.org": { "CVE_data_meta": { "ASSIGNER": "cve@kernel.org", "ID": "CVE-2024-26884", "STATE": "PUBLIC" }, "affects": { "vendor": { "vendor_data": [ { "product": { "product_data": [ { "product_name": "Linux", "version": { "version_data": [ { "version_affected": "\u003c", "version_name": "daaf427c6ab3", "version_value": "33ec04cadb77" }, { "version_value": "not down converted", "x_cve_json_5_version_data": { "defaultStatus": "affected", "versions": [ { "status": "affected", "version": "3.19" }, { "lessThan": "3.19", "status": "unaffected", "version": "0", "versionType": "custom" }, { "lessThanOrEqual": "4.19.*", "status": "unaffected", "version": "4.19.311", "versionType": "custom" }, { "lessThanOrEqual": "5.4.*", "status": "unaffected", "version": "5.4.273", "versionType": "custom" }, { "lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.214", "versionType": "custom" }, { "lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.153", "versionType": "custom" }, { "lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.83", "versionType": "custom" }, { "lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.23", "versionType": "custom" }, { "lessThanOrEqual": "6.7.*", "status": "unaffected", "version": "6.7.11", "versionType": "custom" }, { "lessThanOrEqual": "6.8.*", "status": "unaffected", "version": "6.8.2", "versionType": "custom" }, { "lessThanOrEqual": "*", "status": "unaffected", "version": "6.9-rc1", "versionType": "original_commit_for_fix" } ] } } ] } } ] }, "vendor_name": "Linux" } ] } }, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": { "description_data": [ { "lang": "eng", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix hashtab overflow check on 32-bit arches\n\nThe hashtab code relies on roundup_pow_of_two() to compute the number of\nhash buckets, and contains an overflow check by checking if the\nresulting value is 0. However, on 32-bit arches, the roundup code itself\ncan overflow by doing a 32-bit left-shift of an unsigned long value,\nwhich is undefined behaviour, so it is not guaranteed to truncate\nneatly. This was triggered by syzbot on the DEVMAP_HASH type, which\ncontains the same check, copied from the hashtab code. So apply the same\nfix to hashtab, by moving the overflow check to before the roundup." } ] }, "generator": { "engine": "bippy-d175d3acf727" }, "problemtype": { "problemtype_data": [ { "description": [ { "lang": "eng", "value": "n/a" } ] } ] }, "references": { "reference_data": [ { "name": "https://git.kernel.org/stable/c/33ec04cadb77605b71d9298311919303d390c4d5", "refsource": "MISC", "url": "https://git.kernel.org/stable/c/33ec04cadb77605b71d9298311919303d390c4d5" }, { "name": "https://git.kernel.org/stable/c/92c81fbb3ed2e0dfc33a4183a67135e1ab566ace", "refsource": "MISC", "url": "https://git.kernel.org/stable/c/92c81fbb3ed2e0dfc33a4183a67135e1ab566ace" }, { "name": "https://git.kernel.org/stable/c/64f00b4df0597590b199b62a37a165473bf658a6", "refsource": "MISC", "url": "https://git.kernel.org/stable/c/64f00b4df0597590b199b62a37a165473bf658a6" }, { "name": "https://git.kernel.org/stable/c/3b08cfc65f07b1132c1979d73f014ae6e04de55d", "refsource": "MISC", "url": "https://git.kernel.org/stable/c/3b08cfc65f07b1132c1979d73f014ae6e04de55d" }, { "name": "https://git.kernel.org/stable/c/a83fdaeaea3677b83a53f72ace2d73a19bcd6d93", "refsource": "MISC", "url": "https://git.kernel.org/stable/c/a83fdaeaea3677b83a53f72ace2d73a19bcd6d93" }, { "name": "https://git.kernel.org/stable/c/8435f0961bf3dc65e204094349bd9aeaac1f8868", "refsource": "MISC", "url": "https://git.kernel.org/stable/c/8435f0961bf3dc65e204094349bd9aeaac1f8868" }, { "name": "https://git.kernel.org/stable/c/d817f0d34d927f2deb17dadbfe212c9a6a32ac3e", "refsource": "MISC", "url": "https://git.kernel.org/stable/c/d817f0d34d927f2deb17dadbfe212c9a6a32ac3e" }, { "name": "https://git.kernel.org/stable/c/a6fa75b5096c0f9826a4fabe22d907b0a5bb1016", "refsource": "MISC", "url": "https://git.kernel.org/stable/c/a6fa75b5096c0f9826a4fabe22d907b0a5bb1016" }, { "name": "https://git.kernel.org/stable/c/6787d916c2cf9850c97a0a3f73e08c43e7d973b1", "refsource": "MISC", "url": "https://git.kernel.org/stable/c/6787d916c2cf9850c97a0a3f73e08c43e7d973b1" } ] } }, "nvd.nist.gov": { "cve": { "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix hashtab overflow check on 32-bit arches\n\nThe hashtab code relies on roundup_pow_of_two() to compute the number of\nhash buckets, and contains an overflow check by checking if the\nresulting value is 0. However, on 32-bit arches, the roundup code itself\ncan overflow by doing a 32-bit left-shift of an unsigned long value,\nwhich is undefined behaviour, so it is not guaranteed to truncate\nneatly. This was triggered by syzbot on the DEVMAP_HASH type, which\ncontains the same check, copied from the hashtab code. So apply the same\nfix to hashtab, by moving the overflow check to before the roundup." } ], "id": "CVE-2024-26884", "lastModified": "2024-04-17T12:48:07.510", "metrics": {}, "published": "2024-04-17T11:15:10.163", "references": [ { "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/33ec04cadb77605b71d9298311919303d390c4d5" }, { "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3b08cfc65f07b1132c1979d73f014ae6e04de55d" }, { "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/64f00b4df0597590b199b62a37a165473bf658a6" }, { "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6787d916c2cf9850c97a0a3f73e08c43e7d973b1" }, { "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8435f0961bf3dc65e204094349bd9aeaac1f8868" }, { "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/92c81fbb3ed2e0dfc33a4183a67135e1ab566ace" }, { "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a6fa75b5096c0f9826a4fabe22d907b0a5bb1016" }, { "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a83fdaeaea3677b83a53f72ace2d73a19bcd6d93" }, { "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d817f0d34d927f2deb17dadbfe212c9a6a32ac3e" } ], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis" } } } }
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- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
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