CVE-2025-21887 (GCVE-0-2025-21887)
Vulnerability from cvelistv5
Published
2025-03-27 14:57
Modified
2025-05-04 13:06
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: ovl: fix UAF in ovl_dentry_update_reval by moving dput() in ovl_link_up The issue was caused by dput(upper) being called before ovl_dentry_update_reval(), while upper->d_flags was still accessed in ovl_dentry_remote(). Move dput(upper) after its last use to prevent use-after-free. BUG: KASAN: slab-use-after-free in ovl_dentry_remote fs/overlayfs/util.c:162 [inline] BUG: KASAN: slab-use-after-free in ovl_dentry_update_reval+0xd2/0xf0 fs/overlayfs/util.c:167 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114 print_address_description mm/kasan/report.c:377 [inline] print_report+0xc3/0x620 mm/kasan/report.c:488 kasan_report+0xd9/0x110 mm/kasan/report.c:601 ovl_dentry_remote fs/overlayfs/util.c:162 [inline] ovl_dentry_update_reval+0xd2/0xf0 fs/overlayfs/util.c:167 ovl_link_up fs/overlayfs/copy_up.c:610 [inline] ovl_copy_up_one+0x2105/0x3490 fs/overlayfs/copy_up.c:1170 ovl_copy_up_flags+0x18d/0x200 fs/overlayfs/copy_up.c:1223 ovl_rename+0x39e/0x18c0 fs/overlayfs/dir.c:1136 vfs_rename+0xf84/0x20a0 fs/namei.c:4893 ... </TASK>
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3594aad97e7be2557ca9fa9c931b206b604028c8Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4b49d939b5a79117f939b77cc67efae2694d9799Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/60b4b5c1277fc491da9e1e7abab307bfa39c2db7Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/64455c8051c3aedc71abb7ec8d47c80301f99f00Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a7c41830ffcd17b2177a95a9b99b270302090c35Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c84e125fff2615b4d9c259e762596134eddd2f27Patch
Impacted products
Vendor Product Version
Linux Linux Version: 62f29ca45f832e281fc14966ac25f6ff3bd121ca
Version: e4f2a1feebb3f209a0fca82aa53507a5b8be4d53
Version: b07d5cc93e1b28df47a72c519d09d0a836043613
Version: b07d5cc93e1b28df47a72c519d09d0a836043613
Version: b07d5cc93e1b28df47a72c519d09d0a836043613
Version: b07d5cc93e1b28df47a72c519d09d0a836043613
Version: 714ba10a6dd19752a349e59aa875f3288ccb59b9
Version: 33ab4dd6202f359558a0a2678b94d1b9994c17e5
Version: 1ecdc55e5cd9f70f8d7513802971d4cffb9f77af
 Create a notification for this product.
   Linux Linux Version: 6.5
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\novl: fix UAF in ovl_dentry_update_reval by moving dput() in ovl_link_up\n\nThe issue was caused by dput(upper) being called before\novl_dentry_update_reval(), while upper-\u003ed_flags was still\naccessed in ovl_dentry_remote().\n\nMove dput(upper) after its last use to prevent use-after-free.\n\nBUG: KASAN: slab-use-after-free in ovl_dentry_remote fs/overlayfs/util.c:162 [inline]\nBUG: KASAN: slab-use-after-free in ovl_dentry_update_reval+0xd2/0xf0 fs/overlayfs/util.c:167\n\nCall Trace:\n \u003cTASK\u003e\n __dump_stack lib/dump_stack.c:88 [inline]\n dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114\n print_address_description mm/kasan/report.c:377 [inline]\n print_report+0xc3/0x620 mm/kasan/report.c:488\n kasan_report+0xd9/0x110 mm/kasan/report.c:601\n ovl_dentry_remote fs/overlayfs/util.c:162 [inline]\n ovl_dentry_update_reval+0xd2/0xf0 fs/overlayfs/util.c:167\n ovl_link_up fs/overlayfs/copy_up.c:610 [inline]\n ovl_copy_up_one+0x2105/0x3490 fs/overlayfs/copy_up.c:1170\n ovl_copy_up_flags+0x18d/0x200 fs/overlayfs/copy_up.c:1223\n ovl_rename+0x39e/0x18c0 fs/overlayfs/dir.c:1136\n vfs_rename+0xf84/0x20a0 fs/namei.c:4893\n...\n \u003c/TASK\u003e"
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      "title": "ovl: fix UAF in ovl_dentry_update_reval by moving dput() in ovl_link_up",
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    "cveId": "CVE-2025-21887",
    "datePublished": "2025-03-27T14:57:14.524Z",
    "dateReserved": "2024-12-29T08:45:45.782Z",
    "dateUpdated": "2025-05-04T13:06:40.293Z",
    "state": "PUBLISHED"
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    "nvd": "{\"cve\":{\"id\":\"CVE-2025-21887\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-03-27T15:15:56.603\",\"lastModified\":\"2025-04-01T15:45:08.943\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\novl: fix UAF in ovl_dentry_update_reval by moving dput() in ovl_link_up\\n\\nThe issue was caused by dput(upper) being called before\\novl_dentry_update_reval(), while upper-\u003ed_flags was still\\naccessed in ovl_dentry_remote().\\n\\nMove dput(upper) after its last use to prevent use-after-free.\\n\\nBUG: KASAN: slab-use-after-free in ovl_dentry_remote fs/overlayfs/util.c:162 [inline]\\nBUG: KASAN: slab-use-after-free in ovl_dentry_update_reval+0xd2/0xf0 fs/overlayfs/util.c:167\\n\\nCall Trace:\\n \u003cTASK\u003e\\n __dump_stack lib/dump_stack.c:88 [inline]\\n dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114\\n print_address_description mm/kasan/report.c:377 [inline]\\n print_report+0xc3/0x620 mm/kasan/report.c:488\\n kasan_report+0xd9/0x110 mm/kasan/report.c:601\\n ovl_dentry_remote fs/overlayfs/util.c:162 [inline]\\n ovl_dentry_update_reval+0xd2/0xf0 fs/overlayfs/util.c:167\\n ovl_link_up fs/overlayfs/copy_up.c:610 [inline]\\n ovl_copy_up_one+0x2105/0x3490 fs/overlayfs/copy_up.c:1170\\n ovl_copy_up_flags+0x18d/0x200 fs/overlayfs/copy_up.c:1223\\n ovl_rename+0x39e/0x18c0 fs/overlayfs/dir.c:1136\\n vfs_rename+0xf84/0x20a0 fs/namei.c:4893\\n...\\n \u003c/TASK\u003e\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ovl: Se corrige el UAF en ovl_dentry_update_reval moviendo dput() en ovl_link_up. El problema se deb\u00eda a que dput(upper) se llamaba antes de ovl_dentry_update_reval(), mientras que se segu\u00eda accediendo a upper-\u0026gt;d_flags en ovl_dentry_remote(). Se mueve dput(upper) despu\u00e9s de su \u00faltimo uso para evitar el use-after-free. ERROR: KASAN: slab-use-after-free en ovl_dentry_remote fs/overlayfs/util.c:162 [en l\u00ednea] ERROR: KASAN: slab-use-after-free en ovl_dentry_update_reval+0xd2/0xf0 fs/overlayfs/util.c:167 Rastreo de llamadas:  __dump_stack lib/dump_stack.c:88 [en l\u00ednea] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114 print_address_description mm/kasan/report.c:377 [en l\u00ednea] print_report+0xc3/0x620 mm/kasan/report.c:488 kasan_report+0xd9/0x110 mm/kasan/report.c:601 ovl_dentry_remote fs/overlayfs/util.c:162 [en l\u00ednea] ovl_dentry_update_reval+0xd2/0xf0 fs/overlayfs/util.c:167 ovl_link_up fs/overlayfs/copy_up.c:610 [en l\u00ednea] ovl_copy_up_one+0x2105/0x3490 fs/overlayfs/copy_up.c:1170 ovl_copy_up_flags+0x18d/0x200 fs/overlayfs/copy_up.c:1223 ovl_rename+0x39e/0x18c0 fs/overlayfs/dir.c:1136 vfs_rename+0xf84/0x20a0 fs/namei.c:4893 ... \"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"weaknesses\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-416\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.10.188\",\"versionEndExcluding\":\"5.11\",\"matchCriteriaId\":\"6D42E8C7-CD33-432A-AC09-DC524C88ECE4\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.15.121\",\"versionEndExcluding\":\"5.15.179\",\"matchCriteriaId\":\"C9B8E6A5-F0A2-421F-A00D-2CCDFDC86847\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.1.39\",\"versionEndExcluding\":\"6.1.130\",\"matchCriteriaId\":\"262D590B-5E13-4E7C-A88A-4C5A41908A0E\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.3.13\",\"versionEndExcluding\":\"6.4\",\"matchCriteriaId\":\"9058C05B-5440-4D83-834D-2E94FC46621C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.4.4\",\"versionEndExcluding\":\"6.6.81\",\"matchCriteriaId\":\"D6B5A28B-A3A7-4D06-830C-DF7654268C9D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.12.18\",\"matchCriteriaId\":\"3D5C8D9A-4013-4C1A-810F-AA540BB5737C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.13\",\"versionEndExcluding\":\"6.13.6\",\"matchCriteriaId\":\"64F12D9B-71C2-4CD7-A288-0D5EF1709620\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.14:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"186716B6-2B66-4BD0-852E-D48E71C0C85F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.14:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"0D3E781C-403A-498F-9DA9-ECEE50F41E75\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.14:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"66619FB8-0AAF-4166-B2CF-67B24143261D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.14:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"D3D6550E-6679-4560-902D-AF52DCFE905B\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/3594aad97e7be2557ca9fa9c931b206b604028c8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/4b49d939b5a79117f939b77cc67efae2694d9799\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/60b4b5c1277fc491da9e1e7abab307bfa39c2db7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/64455c8051c3aedc71abb7ec8d47c80301f99f00\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/a7c41830ffcd17b2177a95a9b99b270302090c35\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/c84e125fff2615b4d9c259e762596134eddd2f27\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 7.8, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"HIGH\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2025-21887\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2025-03-27T16:59:58.510815Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-416\", \"description\": \"CWE-416 Use After Free\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-03-27T16:59:59.833Z\"}}], \"cna\": {\"title\": \"ovl: fix UAF in ovl_dentry_update_reval by moving dput() in ovl_link_up\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"62f29ca45f832e281fc14966ac25f6ff3bd121ca\", \"lessThan\": \"4b49d939b5a79117f939b77cc67efae2694d9799\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"e4f2a1feebb3f209a0fca82aa53507a5b8be4d53\", \"lessThan\": \"a7c41830ffcd17b2177a95a9b99b270302090c35\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"b07d5cc93e1b28df47a72c519d09d0a836043613\", \"lessThan\": \"64455c8051c3aedc71abb7ec8d47c80301f99f00\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"b07d5cc93e1b28df47a72c519d09d0a836043613\", \"lessThan\": \"3594aad97e7be2557ca9fa9c931b206b604028c8\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"b07d5cc93e1b28df47a72c519d09d0a836043613\", \"lessThan\": \"60b4b5c1277fc491da9e1e7abab307bfa39c2db7\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"b07d5cc93e1b28df47a72c519d09d0a836043613\", \"lessThan\": \"c84e125fff2615b4d9c259e762596134eddd2f27\", \"versionType\": \"git\"}], \"programFiles\": [\"fs/overlayfs/copy_up.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"6.5\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"6.5\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.15.179\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.130\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.81\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.12.18\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.12.*\"}, {\"status\": \"unaffected\", \"version\": \"6.13.6\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.13.*\"}, {\"status\": \"unaffected\", \"version\": \"6.14\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"fs/overlayfs/copy_up.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/4b49d939b5a79117f939b77cc67efae2694d9799\"}, {\"url\": \"https://git.kernel.org/stable/c/a7c41830ffcd17b2177a95a9b99b270302090c35\"}, {\"url\": \"https://git.kernel.org/stable/c/64455c8051c3aedc71abb7ec8d47c80301f99f00\"}, {\"url\": \"https://git.kernel.org/stable/c/3594aad97e7be2557ca9fa9c931b206b604028c8\"}, {\"url\": \"https://git.kernel.org/stable/c/60b4b5c1277fc491da9e1e7abab307bfa39c2db7\"}, {\"url\": \"https://git.kernel.org/stable/c/c84e125fff2615b4d9c259e762596134eddd2f27\"}], \"x_generator\": {\"engine\": \"bippy-5f407fcff5a0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\novl: fix UAF in ovl_dentry_update_reval by moving dput() in ovl_link_up\\n\\nThe issue was caused by dput(upper) being called before\\novl_dentry_update_reval(), while upper-\u003ed_flags was still\\naccessed in ovl_dentry_remote().\\n\\nMove dput(upper) after its last use to prevent use-after-free.\\n\\nBUG: KASAN: slab-use-after-free in ovl_dentry_remote fs/overlayfs/util.c:162 [inline]\\nBUG: KASAN: slab-use-after-free in ovl_dentry_update_reval+0xd2/0xf0 fs/overlayfs/util.c:167\\n\\nCall Trace:\\n \u003cTASK\u003e\\n __dump_stack lib/dump_stack.c:88 [inline]\\n dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114\\n print_address_description mm/kasan/report.c:377 [inline]\\n print_report+0xc3/0x620 mm/kasan/report.c:488\\n kasan_report+0xd9/0x110 mm/kasan/report.c:601\\n ovl_dentry_remote fs/overlayfs/util.c:162 [inline]\\n ovl_dentry_update_reval+0xd2/0xf0 fs/overlayfs/util.c:167\\n ovl_link_up fs/overlayfs/copy_up.c:610 [inline]\\n ovl_copy_up_one+0x2105/0x3490 fs/overlayfs/copy_up.c:1170\\n ovl_copy_up_flags+0x18d/0x200 fs/overlayfs/copy_up.c:1223\\n ovl_rename+0x39e/0x18c0 fs/overlayfs/dir.c:1136\\n vfs_rename+0xf84/0x20a0 fs/namei.c:4893\\n...\\n \u003c/TASK\u003e\"}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-03-27T14:57:14.524Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2025-21887\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-03-27T17:08:22.888Z\", \"dateReserved\": \"2024-12-29T08:45:45.782Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-03-27T14:57:14.524Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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