CVE-2026-89493

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89493", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.714Z", "datePublished": "2026-09-11T19:43:44.803Z", "dateUpdated": "2026-10-19T08:47:44.950Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:47:44.950Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nocfs2: validate rl_used against rl_count in refcount block validator\n\nocfs2_find_refcount_rec_in_rl() walks the on-disk refcount record array\nwith:\n\n\tfor (; i < le16_to_cpu(rb->rf_records.rl_used); i++) {\n\t\trec = &rb->rf_records.rl_recs[i];\n\t\t...\n\nrl_recs[] lives in a single metadata block (4096 bytes on the common\nconfiguration), so its real capacity is fixed by\nocfs2_refcount_recs_per_rb(sb) (247 records for a 4K block with the\n16-byte ocfs2_refcount_rec). rl_used and rl_count are both read directly\noff disk by ocfs2_validate_refcount_block() and are never checked against\nthat capacity, nor against each other, before any refcount/reflink/CoW\noperation walks the array.\n\nA crafted (or corrupted) refcount block with rl_used == 0xffff makes the\nloop above walk far past the end of the block, dereferencing rl_recs[i]\nfor i up to 65534. The resulting index is then handed to the sibling\nocfs2_insert_refcount_rec(), whose insert-shift does:\n\n\tif (index < le16_to_cpu(rf_list->rl_used))\n\t\tmemmove(&rf_list->rl_recs[index + 1],\n\t\t\t&rf_list->rl_recs[index],\n\t\t\t(le16_to_cpu(rf_list->rl_used) - index) *\n\t\t\t sizeof(struct ocfs2_refcount_rec));\n\ni.e. a memmove() of up to (0xffff - index) * 16 bytes (~1 MiB) from an\noffset already past the block. This is reachable from an ordinary reflink\n(FICLONE) against a crafted/corrupted ocfs2 image: attaching an extent\nwhose cpos sorts past every real record in the leaf forces the lookup to\nrun off the end instead of returning early on a match. The attacker model\nis local: CAP_SYS_ADMIN mounting a crafted or corrupted ocfs2 image, or a\nraw write to the block device backing an already-mounted ocfs2 filesystem.\n\nocfs2_validate_refcount_block() already validates the block's ECC,\nsignature, rf_blkno and rf_fs_generation, but never rl_count/rl_used\nagainst the block's actual on-disk capacity. This is the same class of\ngap that ocfs2_validate_extent_block() (fs/ocfs2/alloc.c) already closes\nfor the sibling extent-list header, which checks both the record capacity\nand the \"used\" bound before any code walks h_list.l_recs[]:\n\n\tif (le16_to_cpu(eb->h_list.l_count) != ocfs2_extent_recs_per_eb(sb)) {\n\t\trc = ocfs2_error(...);\n\t\tgoto bail;\n\t}\n\n\tif (le16_to_cpu(eb->h_list.l_next_free_rec) >\n\t le16_to_cpu(eb->h_list.l_count)) {\n\t\trc = ocfs2_error(...);\n\t\tgoto bail;\n\t}\n\nAdd the equivalent pair of checks to ocfs2_validate_refcount_block():\nreject a refcount block whose rl_count does not match the fixed per-block\ncapacity returned by ocfs2_refcount_recs_per_rb(), and reject rl_used >\nrl_count. Both checks are skipped when OCFS2_REFCOUNT_TREE_FL is set,\nbecause in that case the same union bytes hold an ocfs2_extent_list\n(rf_list), not the refcount record list (rf_records) -- that layout is\nalready validated separately by ocfs2_validate_extent_block() when the\nreferenced extent block is read. This mirrors the existing\n\"!(rb->rf_flags & OCFS2_REFCOUNT_TREE_FL)\" guard used elsewhere in this\nfile (e.g. ocfs2_get_refcount_rec()) to decide whether rf_records or\nrf_list is the live member of the union.\n\nWith this in place, a forged rl_used/rl_count is caught at block\nvalidation time (ocfs2_error()), consistent with every other corruption\ncheck in this function, instead of driving an out-of-bounds read in\nocfs2_find_refcount_rec_in_rl() and a subsequent out-of-bounds memmove()\nin ocfs2_insert_refcount_rec().\n\nVerified against a crafted image on a v6.19 KASAN (KASAN_GENERIC) build:\nreplaying the same reflink (FICLONE) reliably hit a KASAN report in\n__ocfs2_increase_refcount()/ocfs2_insert_refcount_rec() before this patch,\nand triggers no report once ocfs2_validate_refcount_block() rejects the\nforged rl_used/rl_count."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:N - OCFS2 registers export_operations and is commonly NFS-exported or ksmbd-shared on cluster storage; remote NFSv4.2 CLONE or ksmbd FSCTL_DUPLICATE_EXTENTS reaches vfs_clone_file_range\u2192ocfs2_remap_file_range, and NFS WRITE/truncate on refcounted files reaches ocfs2_get_refcount_rec() and the OOB walk/memmove.\nAC:L - A crafted refcount block with rl_used=0xffff plus FICLONE/clone or write/CoW whose cpos sorts past the real leaf records deterministically drives the OOB loop and memmove; the fix commit reproduced this under KASAN with no race or uncontrollable layout.\nPR:L - Triggering needs only write/clone permission on a file whose inode points at the forged refcount block (unprivileged local user or authenticated NFS/SMB client); ocfs2_remap_file_range and ocfs2_reflink_ioctl have no capability check, and planting on-disk metadata does not require init-namespace root.\nUI:N - Once the malformed refcount block is on an already-mounted or NFS/SMB-exported OCFS2 volume, the attacker issues clone, write, or truncate themselves; no separate victim mount, click, or administrator action is required at exploit time.\nS:U - The out-of-bounds read and write corrupt kernel memory in the host parsing the OCFS2 refcount block; impact stays within that kernel's security authority and does not cross a VM, container, or IOMMU boundary.\nC:H - ocfs2_find_refcount_rec_in_rl() indexes rl_recs[i] for i up to 65534 past a single 4K metadata block, performing an approximately 1 MiB out-of-bounds read of adjacent kernel memory and enabling high-bandwidth disclosure.\nI:H - ocfs2_insert_refcount_rec() memmove()s up to (0xffff-index)*16 bytes (~1 MiB) from and to offsets already past the block and writes rl_recs[index] out of bounds, which is an arbitrary kernel out-of-bounds write exploitable for control-flow hijacking.\nA:H - The same OOB access was reproduced as a KASAN fault in __ocfs2_increase_refcount()/ocfs2_insert_refcount_rec() and causes a kernel oops or panic, fully denying availability on the affected node."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/ocfs2/refcounttree.c"], "versions": [{"version": "f2c870e3b12e38da6d9b5b17c4c8ae56a0ed68e4", "lessThan": "f882e9e32d017a6569b2996c63ba3864717788e6", "status": "affected", "versionType": "git"}, {"version": "f2c870e3b12e38da6d9b5b17c4c8ae56a0ed68e4", "lessThan": "5593b63028cb43a6cda75a65ce1db95f00ea6857", "status": "affected", "versionType": "git"}, {"version": "f2c870e3b12e38da6d9b5b17c4c8ae56a0ed68e4", "lessThan": "c8b02f4ee91e757b3fff556c7168b24b7ae55132", "status": "affected", "versionType": "git"}, {"version": "f2c870e3b12e38da6d9b5b17c4c8ae56a0ed68e4", "lessThan": "97584e93fc49a2d59252ac60467e9279f11b1b5b", "status": "affected", "versionType": "git"}, {"version": "f2c870e3b12e38da6d9b5b17c4c8ae56a0ed68e4", "lessThan": "af56e90cb546cb0c47bef059335365283f61d6a4", "status": "affected", "versionType": "git"}, {"version": "f2c870e3b12e38da6d9b5b17c4c8ae56a0ed68e4", "lessThan": "0761d2c9494424469a0d30a9da3496ca010b0b2d", "status": "affected", "versionType": "git"}, {"version": "f2c870e3b12e38da6d9b5b17c4c8ae56a0ed68e4", "lessThan": "04ead708e13ddcb9c39319cbe02a18cef99cb823", "status": "affected", "versionType": "git"}, {"version": "f2c870e3b12e38da6d9b5b17c4c8ae56a0ed68e4", "lessThan": "4ca62df6bc0708947b48da3f6a712ecb8e73929c", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/ocfs2/refcounttree.c"], "versions": [{"version": "2.6.32", "status": "affected"}, {"version": "0", "lessThan": "2.6.32", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.270", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.221", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.188", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.157", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.109", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.50", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.4", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.32", "versionEndExcluding": "5.10.270"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.32", "versionEndExcluding": "5.15.221"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.32", "versionEndExcluding": "6.1.188"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.32", "versionEndExcluding": "6.6.157"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.32", "versionEndExcluding": "6.12.109"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.32", "versionEndExcluding": "6.18.50"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.32", "versionEndExcluding": "7.2.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.32", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/f882e9e32d017a6569b2996c63ba3864717788e6"}, {"url": "https://git.kernel.org/stable/c/5593b63028cb43a6cda75a65ce1db95f00ea6857"}, {"url": "https://git.kernel.org/stable/c/c8b02f4ee91e757b3fff556c7168b24b7ae55132"}, {"url": "https://git.kernel.org/stable/c/97584e93fc49a2d59252ac60467e9279f11b1b5b"}, {"url": "https://git.kernel.org/stable/c/af56e90cb546cb0c47bef059335365283f61d6a4"}, {"url": "https://git.kernel.org/stable/c/0761d2c9494424469a0d30a9da3496ca010b0b2d"}, {"url": "https://git.kernel.org/stable/c/04ead708e13ddcb9c39319cbe02a18cef99cb823"}, {"url": "https://git.kernel.org/stable/c/4ca62df6bc0708947b48da3f6a712ecb8e73929c"}], "title": "ocfs2: validate rl_used against rl_count in refcount block validator", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/ocfs2/refcounttree.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "f882e9e32d017a6569b2996c63ba3864717788e6", "status": "affected", "version": "f2c870e3b12e38da6d9b5b17c4c8ae56a0ed68e4", "versionType": "git"}, {"lessThan": "5593b63028cb43a6cda75a65ce1db95f00ea6857", "status": "affected", "version": "f2c870e3b12e38da6d9b5b17c4c8ae56a0ed68e4", "versionType": "git"}, {"lessThan": "c8b02f4ee91e757b3fff556c7168b24b7ae55132", "status": "affected", "version": "f2c870e3b12e38da6d9b5b17c4c8ae56a0ed68e4", "versionType": "git"}, {"lessThan": "97584e93fc49a2d59252ac60467e9279f11b1b5b", "status": "affected", "version": "f2c870e3b12e38da6d9b5b17c4c8ae56a0ed68e4", "versionType": "git"}, {"lessThan": "af56e90cb546cb0c47bef059335365283f61d6a4", "status": "affected", "version": "f2c870e3b12e38da6d9b5b17c4c8ae56a0ed68e4", "versionType": "git"}, {"lessThan": "0761d2c9494424469a0d30a9da3496ca010b0b2d", "status": "affected", "version": "f2c870e3b12e38da6d9b5b17c4c8ae56a0ed68e4", "versionType": "git"}, {"lessThan": "04ead708e13ddcb9c39319cbe02a18cef99cb823", "status": "affected", "version": "f2c870e3b12e38da6d9b5b17c4c8ae56a0ed68e4", "versionType": "git"}, {"lessThan": "4ca62df6bc0708947b48da3f6a712ecb8e73929c", "status": "affected", "version": "f2c870e3b12e38da6d9b5b17c4c8ae56a0ed68e4", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/ocfs2/refcounttree.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "2.6.32"}, {"lessThan": "2.6.32", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.270", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.221", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.188", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.157", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.109", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.50", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nocfs2: validate rl_used against rl_count in refcount block validator\n\nocfs2_find_refcount_rec_in_rl() walks the on-disk refcount record array\nwith:\n\n\tfor (; i < le16_to_cpu(rb->rf_records.rl_used); i++) {\n\t\trec = &rb->rf_records.rl_recs[i];\n\t\t...\n\nrl_recs[] lives in a single metadata block (4096 bytes on the common\nconfiguration), so its real capacity is fixed by\nocfs2_refcount_recs_per_rb(sb) (247 records for a 4K block with the\n16-byte ocfs2_refcount_rec). rl_used and rl_count are both read directly\noff disk by ocfs2_validate_refcount_block() and are never checked against\nthat capacity, nor against each other, before any refcount/reflink/CoW\noperation walks the array.\n\nA crafted (or corrupted) refcount block with rl_used == 0xffff makes the\nloop above walk far past the end of the block, dereferencing rl_recs[i]\nfor i up to 65534. The resulting index is then handed to the sibling\nocfs2_insert_refcount_rec(), whose insert-shift does:\n\n\tif (index < le16_to_cpu(rf_list->rl_used))\n\t\tmemmove(&rf_list->rl_recs[index + 1],\n\t\t\t&rf_list->rl_recs[index],\n\t\t\t(le16_to_cpu(rf_list->rl_used) - index) *\n\t\t\t sizeof(struct ocfs2_refcount_rec));\n\ni.e. a memmove() of up to (0xffff - index) * 16 bytes (~1 MiB) from an\noffset already past the block. This is reachable from an ordinary reflink\n(FICLONE) against a crafted/corrupted ocfs2 image: attaching an extent\nwhose cpos sorts past every real record in the leaf forces the lookup to\nrun off the end instead of returning early on a match. The attacker model\nis local: CAP_SYS_ADMIN mounting a crafted or corrupted ocfs2 image, or a\nraw write to the block device backing an already-mounted ocfs2 filesystem.\n\nocfs2_validate_refcount_block() already validates the block's ECC,\nsignature, rf_blkno and rf_fs_generation, but never rl_count/rl_used\nagainst the block's actual on-disk capacity. This is the same class of\ngap that ocfs2_validate_extent_block() (fs/ocfs2/alloc.c) already closes\nfor the sibling extent-list header, which checks both the record capacity\nand the \"used\" bound before any code walks h_list.l_recs[]:\n\n\tif (le16_to_cpu(eb->h_list.l_count) != ocfs2_extent_recs_per_eb(sb)) {\n\t\trc = ocfs2_error(...);\n\t\tgoto bail;\n\t}\n\n\tif (le16_to_cpu(eb->h_list.l_next_free_rec) >\n\t le16_to_cpu(eb->h_list.l_count)) {\n\t\trc = ocfs2_error(...);\n\t\tgoto bail;\n\t}\n\nAdd the equivalent pair of checks to ocfs2_validate_refcount_block():\nreject a refcount block whose rl_count does not match the fixed per-block\ncapacity returned by ocfs2_refcount_recs_per_rb(), and reject rl_used >\nrl_count. Both checks are skipped when OCFS2_REFCOUNT_TREE_FL is set,\nbecause in that case the same union bytes hold an ocfs2_extent_list\n(rf_list), not the refcount record list (rf_records) -- that layout is\nalready validated separately by ocfs2_validate_extent_block() when the\nreferenced extent block is read. This mirrors the existing\n\"!(rb->rf_flags & OCFS2_REFCOUNT_TREE_FL)\" guard used elsewhere in this\nfile (e.g. ocfs2_get_refcount_rec()) to decide whether rf_records or\nrf_list is the live member of the union.\n\nWith this in place, a forged rl_used/rl_count is caught at block\nvalidation time (ocfs2_error()), consistent with every other corruption\ncheck in this function, instead of driving an out-of-bounds read in\nocfs2_find_refcount_rec_in_rl() and a subsequent out-of-bounds memmove()\nin ocfs2_insert_refcount_rec().\n\nVerified against a crafted image on a v6.19 KASAN (KASAN_GENERIC) build:\nreplaying the same reflink (FICLONE) reliably hit a KASAN report in\n__ocfs2_increase_refcount()/ocfs2_insert_refcount_rec() before this patch,\nand triggers no report once ocfs2_validate_refcount_block() rejects the\nforged rl_used/rl_count."}], "id": "CVE-2026-89493", "lastModified": "2026-10-19T09:17:43.197", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-09-11T20:19:31.220", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/04ead708e13ddcb9c39319cbe02a18cef99cb823"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0761d2c9494424469a0d30a9da3496ca010b0b2d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4ca62df6bc0708947b48da3f6a712ecb8e73929c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5593b63028cb43a6cda75a65ce1db95f00ea6857"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/97584e93fc49a2d59252ac60467e9279f11b1b5b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/af56e90cb546cb0c47bef059335365283f61d6a4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c8b02f4ee91e757b3fff556c7168b24b7ae55132"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f882e9e32d017a6569b2996c63ba3864717788e6"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: ocfs2: Memory corruption due to insufficient refcount block validation", "id": "2532390", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532390"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.7", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:H", "status": "draft"}, "cwe": "CWE-787", "details": ["A flaw was found in the Linux kernel's ocfs2 component. A local attacker with CAP_SYS_ADMIN privileges could exploit this by mounting a crafted or corrupted ocfs2 image, or by performing a raw write to the block device backing an already-mounted ocfs2 filesystem. This vulnerability arises from insufficient validation of rl_used against rl_count in the refcount block validator, allowing an out-of-bounds read and write operation. Successful exploitation could lead to memory corruption and system instability."], "name": "CVE-2026-89493", "public_date": "2026-09-11T19:43:44Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-89493\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-89493\nhttps://git.kernel.org/stable/c/04ead708e13ddcb9c39319cbe02a18cef99cb823\nhttps://git.kernel.org/stable/c/0761d2c9494424469a0d30a9da3496ca010b0b2d\nhttps://git.kernel.org/stable/c/4ca62df6bc0708947b48da3f6a712ecb8e73929c\nhttps://git.kernel.org/stable/c/af56e90cb546cb0c47bef059335365283f61d6a4"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f2c870e3b12e38da6d9b5b17c4c8ae56a0ed68e4,af56e90cb546cb0c47bef059335365283f61d6a4)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f2c870e3b12e38da6d9b5b17c4c8ae56a0ed68e4,0761d2c9494424469a0d30a9da3496ca010b0b2d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f2c870e3b12e38da6d9b5b17c4c8ae56a0ed68e4,04ead708e13ddcb9c39319cbe02a18cef99cb823)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f2c870e3b12e38da6d9b5b17c4c8ae56a0ed68e4,4ca62df6bc0708947b48da3f6a712ecb8e73929c)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.6.32"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,2.6.32)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.109,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.50,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.4,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-12T16:30:13.326092+00:00", "updated": "2026-09-15T22:45:07.202066+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}