CVE-2025-68261 (GCVE-0-2025-68261)
Vulnerability from cvelistv5 – Published: 2025-12-16 14:45 – Updated: 2026-09-08 08:43
VLAI
EPSS
VEX
Title
ext4: add i_data_sem protection in ext4_destroy_inline_data_nolock()
Summary
In the Linux kernel, the following vulnerability has been resolved:
ext4: add i_data_sem protection in ext4_destroy_inline_data_nolock()
Fix a race between inline data destruction and block mapping.
The function ext4_destroy_inline_data_nolock() changes the inode data
layout by clearing EXT4_INODE_INLINE_DATA and setting EXT4_INODE_EXTENTS.
At the same time, another thread may execute ext4_map_blocks(), which
tests EXT4_INODE_EXTENTS to decide whether to call ext4_ext_map_blocks()
or ext4_ind_map_blocks().
Without i_data_sem protection, ext4_ind_map_blocks() may receive inode
with EXT4_INODE_EXTENTS flag and triggering assert.
kernel BUG at fs/ext4/indirect.c:546!
EXT4-fs (loop2): unmounting filesystem.
invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:ext4_ind_map_blocks.cold+0x2b/0x5a fs/ext4/indirect.c:546
Call Trace:
<TASK>
ext4_map_blocks+0xb9b/0x16f0 fs/ext4/inode.c:681
_ext4_get_block+0x242/0x590 fs/ext4/inode.c:822
ext4_block_write_begin+0x48b/0x12c0 fs/ext4/inode.c:1124
ext4_write_begin+0x598/0xef0 fs/ext4/inode.c:1255
ext4_da_write_begin+0x21e/0x9c0 fs/ext4/inode.c:3000
generic_perform_write+0x259/0x5d0 mm/filemap.c:3846
ext4_buffered_write_iter+0x15b/0x470 fs/ext4/file.c:285
ext4_file_write_iter+0x8e0/0x17f0 fs/ext4/file.c:679
call_write_iter include/linux/fs.h:2271 [inline]
do_iter_readv_writev+0x212/0x3c0 fs/read_write.c:735
do_iter_write+0x186/0x710 fs/read_write.c:861
vfs_iter_write+0x70/0xa0 fs/read_write.c:902
iter_file_splice_write+0x73b/0xc90 fs/splice.c:685
do_splice_from fs/splice.c:763 [inline]
direct_splice_actor+0x10f/0x170 fs/splice.c:950
splice_direct_to_actor+0x33a/0xa10 fs/splice.c:896
do_splice_direct+0x1a9/0x280 fs/splice.c:1002
do_sendfile+0xb13/0x12c0 fs/read_write.c:1255
__do_sys_sendfile64 fs/read_write.c:1323 [inline]
__se_sys_sendfile64 fs/read_write.c:1309 [inline]
__x64_sys_sendfile64+0x1cf/0x210 fs/read_write.c:1309
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x35/0x80 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x6e/0xd8
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-16 16:25 UTC
Assigner
References
9 references
Impacted products
5 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
c755e251357a0cee0679081f08c3f4ba797a8009 , < b322bac9f01d03190b5abc52be5d9dd9f22a2b41
(git)
Affected: c755e251357a0cee0679081f08c3f4ba797a8009 , < 61e03dc3794ebf77a706b85e5a36c9c6d70be6de (git) Affected: c755e251357a0cee0679081f08c3f4ba797a8009 , < 5b266cf6851ce72b11b067fe02adf5a8687104ad (git) Affected: c755e251357a0cee0679081f08c3f4ba797a8009 , < 144c48da33a01d92995aeccd8208eb47d2a8e659 (git) Affected: c755e251357a0cee0679081f08c3f4ba797a8009 , < 22a76b0861ae61a299c8e126c1aca8c4fda820fd (git) Affected: c755e251357a0cee0679081f08c3f4ba797a8009 , < ba8aeff294ac7ff6dfe293663d815c54c5ee218c (git) Affected: c755e251357a0cee0679081f08c3f4ba797a8009 , < 5cad18e527ba8a9ca5463cc170073eeb5a4826f4 (git) Affected: c755e251357a0cee0679081f08c3f4ba797a8009 , < 0cd8feea8777f8d9b9a862b89c688b049a5c8475 (git) Affected: 3e96c3fdcfccb321a9e1623f78cc71b44593e965 (git) Affected: 5781ac24bbd998ebb1ff30143bb06244d847af48 (git) Affected: 9b06cce3ca4d60d442c39bfa7c058b71b1cee6c2 (git) Affected: da1e40237f8f3516581b534c484c236a79ccfd14 (git) Affected: 7cf6b709b6412afd1d93b2c4b37163c3602e3b95 (git) Affected: 3.16.44 , < 3.17 (semver) Affected: 3.18.107 , < 3.19 (semver) Affected: 4.4.129 , < 4.5 (semver) Affected: 4.9.14 , < 4.10 (semver) Affected: 4.10.2 , < 4.11 (semver) |
guessed | |
| Linux | Linux |
Affected:
4.11
Unaffected: 0 , < 4.11 (semver) Unaffected: 5.10.248 , ≤ 5.10.* (semver) Unaffected: 5.15.198 , ≤ 5.15.* (semver) Unaffected: 6.1.160 , ≤ 6.1.* (semver) Unaffected: 6.6.120 , ≤ 6.6.* (semver) Unaffected: 6.12.62 , ≤ 6.12.* (semver) Unaffected: 6.17.12 , ≤ 6.17.* (semver) Unaffected: 6.18.1 , ≤ 6.18.* (semver) Unaffected: 6.19 , ≤ * (original_commit_for_fix) |
guessed | |
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP |
Affected:
V3.1.6 , < *
(custom)
|
guessed | |
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP |
Affected:
V3.1.6 , < *
(custom)
|
guessed | |
| Siemens | SIPLUS S7-1500 CPU 1518-4 PN/DP MFP |
Affected:
V3.1.6 , < *
(custom)
|
guessed |
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: add i_data_sem protection in ext4_destroy_inline_data_nolock()\n\nFix a race between inline data destruction and block mapping.\n\nThe function ext4_destroy_inline_data_nolock() changes the inode data\nlayout by clearing EXT4_INODE_INLINE_DATA and setting EXT4_INODE_EXTENTS.\nAt the same time, another thread may execute ext4_map_blocks(), which\ntests EXT4_INODE_EXTENTS to decide whether to call ext4_ext_map_blocks()\nor ext4_ind_map_blocks().\n\nWithout i_data_sem protection, ext4_ind_map_blocks() may receive inode\nwith EXT4_INODE_EXTENTS flag and triggering assert.\n\nkernel BUG at fs/ext4/indirect.c:546!\nEXT4-fs (loop2): unmounting filesystem.\ninvalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014\nRIP: 0010:ext4_ind_map_blocks.cold+0x2b/0x5a fs/ext4/indirect.c:546\n\nCall Trace:\n \u003cTASK\u003e\n ext4_map_blocks+0xb9b/0x16f0 fs/ext4/inode.c:681\n _ext4_get_block+0x242/0x590 fs/ext4/inode.c:822\n ext4_block_write_begin+0x48b/0x12c0 fs/ext4/inode.c:1124\n ext4_write_begin+0x598/0xef0 fs/ext4/inode.c:1255\n ext4_da_write_begin+0x21e/0x9c0 fs/ext4/inode.c:3000\n generic_perform_write+0x259/0x5d0 mm/filemap.c:3846\n ext4_buffered_write_iter+0x15b/0x470 fs/ext4/file.c:285\n ext4_file_write_iter+0x8e0/0x17f0 fs/ext4/file.c:679\n call_write_iter include/linux/fs.h:2271 [inline]\n do_iter_readv_writev+0x212/0x3c0 fs/read_write.c:735\n do_iter_write+0x186/0x710 fs/read_write.c:861\n vfs_iter_write+0x70/0xa0 fs/read_write.c:902\n iter_file_splice_write+0x73b/0xc90 fs/splice.c:685\n do_splice_from fs/splice.c:763 [inline]\n direct_splice_actor+0x10f/0x170 fs/splice.c:950\n splice_direct_to_actor+0x33a/0xa10 fs/splice.c:896\n do_splice_direct+0x1a9/0x280 fs/splice.c:1002\n do_sendfile+0xb13/0x12c0 fs/read_write.c:1255\n __do_sys_sendfile64 fs/read_write.c:1323 [inline]\n __se_sys_sendfile64 fs/read_write.c:1309 [inline]\n __x64_sys_sendfile64+0x1cf/0x210 fs/read_write.c:1309\n do_syscall_x64 arch/x86/entry/common.c:51 [inline]\n do_syscall_64+0x35/0x80 arch/x86/entry/common.c:81\n entry_SYSCALL_64_after_hwframe+0x6e/0xd8"
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 7.5,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
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"scenarios": [
{
"lang": "en",
"value": "AV:N - A remote client can reach the race through a ksmbd WRITE plus FLUSH/write-through request or an NFS WRITE plus COMMIT when an inline-data ext4 filesystem backs the exported share.\nAC:L - The attacker controls both sides by issuing concurrent writes and flushes or commits and can retry until the race succeeds; the inline-data filesystem feature is a deployment precondition rather than an uncontrollable race condition.\nPR:N - A guest-writable SMB share or anonymous writable NFS export permits the required file creation and write operations without authentication or prior privileges.\nUI:N - The attacker performs all required file operations directly, with no victim action needed after the filesystem and network share are available.\nS:U - The failure affects the host kernel and filesystem within their existing security authority and does not cross a virtualization, sandbox, or IOMMU boundary.\nC:N - The demonstrated failure is an assertion-triggered BUG with no information returned to the attacker, out-of-bounds read, use-after-free, or established disclosure primitive.\nI:N - The unconditional assertion occurs at the entry to ext4_ind_map_blocks() before that mapper modifies block mappings, and no arbitrary-write or memory-corruption primitive is established.\nA:H - The failed assertion executes BUG(), causing a kernel oops and potentially a full panic when panic-on-oops is enabled, allowing repeated denial of service."
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"epss": {
"cve": "CVE-2025-68261",
"date": "2026-09-16",
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(loop2): unmounting filesystem.\\ninvalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI\\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014\\nRIP: 0010:ext4_ind_map_blocks.cold+0x2b/0x5a fs/ext4/indirect.c:546\\n\\nCall Trace:\\n \u003cTASK\u003e\\n ext4_map_blocks+0xb9b/0x16f0 fs/ext4/inode.c:681\\n _ext4_get_block+0x242/0x590 fs/ext4/inode.c:822\\n ext4_block_write_begin+0x48b/0x12c0 fs/ext4/inode.c:1124\\n ext4_write_begin+0x598/0xef0 fs/ext4/inode.c:1255\\n ext4_da_write_begin+0x21e/0x9c0 fs/ext4/inode.c:3000\\n generic_perform_write+0x259/0x5d0 mm/filemap.c:3846\\n ext4_buffered_write_iter+0x15b/0x470 fs/ext4/file.c:285\\n ext4_file_write_iter+0x8e0/0x17f0 fs/ext4/file.c:679\\n call_write_iter include/linux/fs.h:2271 [inline]\\n do_iter_readv_writev+0x212/0x3c0 fs/read_write.c:735\\n do_iter_write+0x186/0x710 fs/read_write.c:861\\n vfs_iter_write+0x70/0xa0 fs/read_write.c:902\\n iter_file_splice_write+0x73b/0xc90 fs/splice.c:685\\n do_splice_from 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"redhat_vex": {
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"current_release_date": "2026-07-30T08:33:42+00:00",
"cve": "CVE-2025-68261",
"id": "CVE-2025-68261",
"initial_release_date": "2025-12-16T00:00:00+00:00",
"product_status:known_affected": "232",
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"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: Linux kernel: Denial of Service in ext4 due to a race condition",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-68261.json",
"version": "3"
},
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"product_status:first_fixed": "2",
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"product_status:recommended": "332",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2025-68261",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-68261.json",
"version": "40"
},
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\"unaffected\", \"version\": \"5.15.198\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.160\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.120\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.12.62\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.12.*\"}, {\"status\": \"unaffected\", \"version\": \"6.17.12\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.17.*\"}, {\"status\": \"unaffected\", \"version\": \"6.18.1\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.18.*\"}, {\"status\": \"unaffected\", \"version\": \"6.19\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"fs/ext4/inline.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/b322bac9f01d03190b5abc52be5d9dd9f22a2b41\"}, {\"url\": \"https://git.kernel.org/stable/c/61e03dc3794ebf77a706b85e5a36c9c6d70be6de\"}, {\"url\": \"https://git.kernel.org/stable/c/5b266cf6851ce72b11b067fe02adf5a8687104ad\"}, {\"url\": \"https://git.kernel.org/stable/c/144c48da33a01d92995aeccd8208eb47d2a8e659\"}, {\"url\": \"https://git.kernel.org/stable/c/22a76b0861ae61a299c8e126c1aca8c4fda820fd\"}, {\"url\": \"https://git.kernel.org/stable/c/ba8aeff294ac7ff6dfe293663d815c54c5ee218c\"}, {\"url\": \"https://git.kernel.org/stable/c/5cad18e527ba8a9ca5463cc170073eeb5a4826f4\"}, {\"url\": \"https://git.kernel.org/stable/c/0cd8feea8777f8d9b9a862b89c688b049a5c8475\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\next4: add i_data_sem protection in ext4_destroy_inline_data_nolock()\\n\\nFix a race between inline data destruction and block mapping.\\n\\nThe function ext4_destroy_inline_data_nolock() changes the inode data\\nlayout by clearing EXT4_INODE_INLINE_DATA and setting EXT4_INODE_EXTENTS.\\nAt the same time, another thread may execute ext4_map_blocks(), which\\ntests EXT4_INODE_EXTENTS to decide whether to call ext4_ext_map_blocks()\\nor ext4_ind_map_blocks().\\n\\nWithout i_data_sem protection, ext4_ind_map_blocks() may receive inode\\nwith EXT4_INODE_EXTENTS flag and triggering assert.\\n\\nkernel BUG at fs/ext4/indirect.c:546!\\nEXT4-fs (loop2): unmounting filesystem.\\ninvalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI\\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014\\nRIP: 0010:ext4_ind_map_blocks.cold+0x2b/0x5a fs/ext4/indirect.c:546\\n\\nCall Trace:\\n \u003cTASK\u003e\\n ext4_map_blocks+0xb9b/0x16f0 fs/ext4/inode.c:681\\n _ext4_get_block+0x242/0x590 fs/ext4/inode.c:822\\n ext4_block_write_begin+0x48b/0x12c0 fs/ext4/inode.c:1124\\n ext4_write_begin+0x598/0xef0 fs/ext4/inode.c:1255\\n ext4_da_write_begin+0x21e/0x9c0 fs/ext4/inode.c:3000\\n generic_perform_write+0x259/0x5d0 mm/filemap.c:3846\\n ext4_buffered_write_iter+0x15b/0x470 fs/ext4/file.c:285\\n ext4_file_write_iter+0x8e0/0x17f0 fs/ext4/file.c:679\\n call_write_iter include/linux/fs.h:2271 [inline]\\n do_iter_readv_writev+0x212/0x3c0 fs/read_write.c:735\\n do_iter_write+0x186/0x710 fs/read_write.c:861\\n vfs_iter_write+0x70/0xa0 fs/read_write.c:902\\n iter_file_splice_write+0x73b/0xc90 fs/splice.c:685\\n do_splice_from fs/splice.c:763 [inline]\\n direct_splice_actor+0x10f/0x170 fs/splice.c:950\\n splice_direct_to_actor+0x33a/0xa10 fs/splice.c:896\\n do_splice_direct+0x1a9/0x280 fs/splice.c:1002\\n do_sendfile+0xb13/0x12c0 fs/read_write.c:1255\\n __do_sys_sendfile64 fs/read_write.c:1323 [inline]\\n __se_sys_sendfile64 fs/read_write.c:1309 [inline]\\n __x64_sys_sendfile64+0x1cf/0x210 fs/read_write.c:1309\\n do_syscall_x64 arch/x86/entry/common.c:51 [inline]\\n do_syscall_64+0x35/0x80 arch/x86/entry/common.c:81\\n entry_SYSCALL_64_after_hwframe+0x6e/0xd8\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.248\", \"versionStartIncluding\": \"4.11\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.198\", \"versionStartIncluding\": \"4.11\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.160\", \"versionStartIncluding\": \"4.11\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.120\", \"versionStartIncluding\": \"4.11\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12.62\", \"versionStartIncluding\": \"4.11\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.17.12\", \"versionStartIncluding\": \"4.11\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.18.1\", \"versionStartIncluding\": \"4.11\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.19\", \"versionStartIncluding\": \"4.11\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"3.16.44\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"3.18.107\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"4.4.129\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"4.9.14\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"4.10.2\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-08-05T12:10:33.475Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2025-68261\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-09-08T08:43:05.655Z\", \"dateReserved\": \"2025-12-16T13:41:40.267Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-12-16T14:45:03.252Z\", \"assignerShortName\": \"Linux\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- 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.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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