{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2024-50265", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2024-50265", "idYear": 2024, "status": "PUBLISHED", "publishedAt": "2024-11-19T01:30:00.861Z", "updatedAt": "2026-05-11T20:48:46.700Z", "importedAt": "2026-10-24T01:57:20.494Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "ocfs2: remove entry once instead of null-ptr-dereference in ocfs2_xa_remove()", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nocfs2: remove entry once instead of null-ptr-dereference in ocfs2_xa_remove()\n\nSyzkaller is able to provoke null-ptr-dereference in ocfs2_xa_remove():\n\n[ 57.319872] (a.out,1161,7):ocfs2_xa_remove:2028 ERROR: status = -12\n[ 57.320420] (a.out,1161,7):ocfs2_xa_cleanup_value_truncate:1999 ERROR: Partial truncate while removing xattr overlay.upper. Leaking 1 clusters and removing the entry\n[ 57.321727] BUG: kernel NULL pointer dereference, address: 0000000000000004\n[...]\n[ 57.325727] RIP: 0010:ocfs2_xa_block_wipe_namevalue+0x2a/0xc0\n[...]\n[ 57.331328] Call Trace:\n[ 57.331477] \n[...]\n[ 57.333511] ? do_user_addr_fault+0x3e5/0x740\n[ 57.333778] ? exc_page_fault+0x70/0x170\n[ 57.334016] ? asm_exc_page_fault+0x2b/0x30\n[ 57.334263] ? __pfx_ocfs2_xa_block_wipe_namevalue+0x10/0x10\n[ 57.334596] ? ocfs2_xa_block_wipe_namevalue+0x2a/0xc0\n[ 57.334913] ocfs2_xa_remove_entry+0x23/0xc0\n[ 57.335164] ocfs2_xa_set+0x704/0xcf0\n[ 57.335381] ? _raw_spin_unlock+0x1a/0x40\n[ 57.335620] ? ocfs2_inode_cache_unlock+0x16/0x20\n[ 57.335915] ? trace_preempt_on+0x1e/0x70\n[ 57.336153] ? start_this_handle+0x16c/0x500\n[ 57.336410] ? preempt_count_sub+0x50/0x80\n[ 57.336656] ? _raw_read_unlock+0x20/0x40\n[ 57.336906] ? start_this_handle+0x16c/0x500\n[ 57.337162] ocfs2_xattr_block_set+0xa6/0x1e0\n[ 57.337424] __ocfs2_xattr_set_handle+0x1fd/0x5d0\n[ 57.337706] ? ocfs2_start_trans+0x13d/0x290\n[ 57.337971] ocfs2_xattr_set+0xb13/0xfb0\n[ 57.338207] ? dput+0x46/0x1c0\n[ 57.338393] ocfs2_xattr_trusted_set+0x28/0x30\n[ 57.338665] ? ocfs2_xattr_trusted_set+0x28/0x30\n[ 57.338948] __vfs_removexattr+0x92/0xc0\n[ 57.339182] __vfs_removexattr_locked+0xd5/0x190\n[ 57.339456] ? preempt_count_sub+0x50/0x80\n[ 57.339705] vfs_removexattr+0x5f/0x100\n[...]\n\nReproducer uses faultinject facility to fail ocfs2_xa_remove() ->\nocfs2_xa_value_truncate() with -ENOMEM.\n\nIn this case the comment mentions that we can return 0 if\nocfs2_xa_cleanup_value_truncate() is going to wipe the entry\nanyway. But the following 'rc' check is wrong and execution flow do\n'ocfs2_xa_remove_entry(loc);' twice:\n* 1st: in ocfs2_xa_cleanup_value_truncate();\n* 2nd: returning back to ocfs2_xa_remove() instead of going to 'out'.\n\nFix this by skipping the 2nd removal of the same entry and making\nsyzkaller repro happy.", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "399ff3a748cf4c8c853e96dd477153202636527b", "status": "affected", "versionType": "git", "lessThan": "38cbf13b2e7a31362babe411f7c2c3c52cd2734b" }, { "version": "399ff3a748cf4c8c853e96dd477153202636527b", "status": "affected", "versionType": "git", "lessThan": "168a9b8303fcb0317db4c06b23ce1c0ce2af4e10" }, { "version": "399ff3a748cf4c8c853e96dd477153202636527b", "status": "affected", "versionType": "git", "lessThan": "6a7e6dcf90fe7721d0863067b6ca9a9442134692" }, { "version": "399ff3a748cf4c8c853e96dd477153202636527b", "status": "affected", "versionType": "git", "lessThan": "dcc8fe8c83145041cb6c80cac21f6173a3ff0204" }, { "version": "399ff3a748cf4c8c853e96dd477153202636527b", "status": "affected", "versionType": "git", "lessThan": "86dd0e8d42828923c68ad506933336bcd6f2317d" }, { "version": "399ff3a748cf4c8c853e96dd477153202636527b", "status": "affected", "versionType": "git", "lessThan": "dd73c942eed76a014c7a5597e6926435274d2c4c" }, { "version": "399ff3a748cf4c8c853e96dd477153202636527b", "status": "affected", "versionType": "git", "lessThan": "2b5369528ee63c88371816178a05b5e664c87386" }, { "version": "399ff3a748cf4c8c853e96dd477153202636527b", "status": "affected", "versionType": "git", "lessThan": "0b63c0e01fba40e3992bc627272ec7b618ccaef7" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "2.6.34", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "2.6.34" }, { "version": "4.19.324", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "4.19.*" }, { "version": "5.4.286", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.4.*" }, { "version": "5.10.230", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.172", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.117", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.61", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.11.8", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.11.*" }, { "version": "6.12", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }