{ "schema_version": "1.6.1", "id": "RPI-CVE-2023-52436", "modified": "2026-10-09T11:39:44Z", "upstream": [ "CVE-2023-52436" ], "published": "2024-02-20T18:55:31Z", "summary": "f2fs: explicitly null-terminate the xattr list", "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: explicitly null-terminate the xattr list\n\nWhen setting an xattr, explicitly null-terminate the xattr list. This\neliminates the fragile assumption that the unused xattr space is always\nzeroed.", "severity": [ { "type": "CVSS_V3", "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H" } ], "affected": [ { "package": { "ecosystem": "Raspberry Pi OS:12", "name": "linux" }, "versions": [ "1:6.1.21-1+rpt1", "1:6.1.47-1+rpt2", "1:6.1.47-1+rpt4", "1:6.1.54-1+rpt2", "1:6.1.58-1+rpt2", "1:6.1.63-1+rpt1", "1:6.1.73-1+rpt1" ], "ecosystem_specific": { "binaries": [ { "binary_name": "linux-image-6.1.0-rpi1-rpi-v6", "binary_version": "1:6.1.21-1+rpt1" }, { "binary_name": "linux-image-6.1.0-rpi1-rpi-v7", "binary_version": "1:6.1.21-1+rpt1" }, { "binary_name": "linux-image-6.1.0-rpi1-rpi-v7l", "binary_version": "1:6.1.21-1+rpt1" }, { "binary_name": "linux-image-6.1.0-rpi1-rpi-v8", "binary_version": "1:6.1.21-1+rpt1" }, { "binary_name": "linux-image-6.1.0-rpi2-rpi-v6", "binary_version": "1:6.1.47-1+rpt2" }, { "binary_name": "linux-image-6.1.0-rpi2-rpi-v7", "binary_version": "1:6.1.47-1+rpt2" }, { "binary_name": "linux-image-6.1.0-rpi2-rpi-v7l", "binary_version": "1:6.1.47-1+rpt2" }, { "binary_name": "linux-image-6.1.0-rpi2-rpi-v8", "binary_version": "1:6.1.47-1+rpt2" }, { "binary_name": "linux-image-6.1.0-rpi3-rpi-2712", "binary_version": "1:6.1.47-1+rpt4" }, { "binary_name": "linux-image-6.1.0-rpi3-rpi-v6", "binary_version": "1:6.1.47-1+rpt4" }, { "binary_name": "linux-image-6.1.0-rpi3-rpi-v7", "binary_version": "1:6.1.47-1+rpt4" }, { "binary_name": "linux-image-6.1.0-rpi3-rpi-v7l", "binary_version": "1:6.1.47-1+rpt4" }, { "binary_name": "linux-image-6.1.0-rpi3-rpi-v8", "binary_version": "1:6.1.47-1+rpt4" }, { "binary_name": "linux-image-6.1.0-rpi4-rpi-2712", "binary_version": "1:6.1.54-1+rpt2" }, { "binary_name": "linux-image-6.1.0-rpi4-rpi-v6", "binary_version": "1:6.1.54-1+rpt2" }, { "binary_name": "linux-image-6.1.0-rpi4-rpi-v7", "binary_version": "1:6.1.54-1+rpt2" }, { "binary_name": "linux-image-6.1.0-rpi4-rpi-v7l", "binary_version": "1:6.1.54-1+rpt2" }, { "binary_name": "linux-image-6.1.0-rpi4-rpi-v8", "binary_version": "1:6.1.54-1+rpt2" }, { "binary_name": "linux-image-6.1.0-rpi6-rpi-2712", "binary_version": "1:6.1.58-1+rpt2" }, { "binary_name": "linux-image-6.1.0-rpi6-rpi-v6", "binary_version": "1:6.1.58-1+rpt2" }, { "binary_name": "linux-image-6.1.0-rpi6-rpi-v7", "binary_version": "1:6.1.58-1+rpt2" }, { "binary_name": "linux-image-6.1.0-rpi6-rpi-v7l", "binary_version": "1:6.1.58-1+rpt2" }, { "binary_name": "linux-image-6.1.0-rpi6-rpi-v8", "binary_version": "1:6.1.58-1+rpt2" }, { "binary_name": "linux-image-6.1.0-rpi7-rpi-2712", "binary_version": "1:6.1.63-1+rpt1" }, { "binary_name": "linux-image-6.1.0-rpi7-rpi-v6", "binary_version": "1:6.1.63-1+rpt1" }, { "binary_name": "linux-image-6.1.0-rpi7-rpi-v7", "binary_version": "1:6.1.63-1+rpt1" }, { "binary_name": "linux-image-6.1.0-rpi7-rpi-v7l", "binary_version": "1:6.1.63-1+rpt1" }, { "binary_name": "linux-image-6.1.0-rpi7-rpi-v8", "binary_version": "1:6.1.63-1+rpt1" }, { "binary_name": "linux-image-6.1.0-rpi8-rpi-2712", "binary_version": "1:6.1.73-1+rpt1" }, { "binary_name": "linux-image-6.1.0-rpi8-rpi-v6", "binary_version": "1:6.1.73-1+rpt1" }, { "binary_name": "linux-image-6.1.0-rpi8-rpi-v7", "binary_version": "1:6.1.73-1+rpt1" }, { "binary_name": "linux-image-6.1.0-rpi8-rpi-v7l", "binary_version": "1:6.1.73-1+rpt1" }, { "binary_name": "linux-image-6.1.0-rpi8-rpi-v8", "binary_version": "1:6.1.73-1+rpt1" } ] }, "database_specific": { "per_version": { "1:6.1.21-1+rpt1": { "linux_commit": "0afb5e98488aed7017b9bf321b575d0177feb7ed", "upstream_version": "6.1.21", "assessment": "commit ancestry (strak rule)", "upstream_fixed": "6.1.74" }, "1:6.1.47-1+rpt2": { "linux_commit": "655fc658a15ae7a6f37103754adb39ba52a9a14e", "upstream_version": "6.1.47", "assessment": "commit ancestry (strak rule)", "upstream_fixed": "6.1.74" }, "1:6.1.47-1+rpt4": { "linux_commit": "655fc658a15ae7a6f37103754adb39ba52a9a14e", "upstream_version": "6.1.47", "assessment": "commit ancestry (strak rule)", "upstream_fixed": "6.1.74", "compiled_filter": false }, "1:6.1.54-1+rpt2": { "linux_commit": "2906f7abdc03d4a92b6b0e2e0c87ea2a9dffe8f7", "upstream_version": "6.1.54", "assessment": "commit ancestry (strak rule)", "upstream_fixed": "6.1.74" }, "1:6.1.58-1+rpt2": { "linux_commit": "ccf1586ad0663fa91238ac56abf6340d6d740d18", "upstream_version": "6.1.58", "assessment": "commit ancestry (strak rule)", "upstream_fixed": "6.1.74" }, "1:6.1.63-1+rpt1": { "linux_commit": null, "upstream_version": "6.1.63", "assessment": "upstream version (no usable Linux commit)", "upstream_fixed": "6.1.74" }, "1:6.1.73-1+rpt1": { "linux_commit": null, "upstream_version": "6.1.73", "assessment": "upstream version (no usable Linux commit)", "upstream_fixed": "6.1.74" } } } } ], "references": [ { "type": "ADVISORY", "url": "https://www.cve.org/CVERecord?id=CVE-2023-52436" }, { "type": "FIX", "url": "https://git.kernel.org/stable/c/16ae3132ff7746894894927c1892493693b89135" }, { "type": "FIX", "url": "https://git.kernel.org/stable/c/12cf91e23b126718a96b914f949f2cdfeadc7b2a" }, { "type": "FIX", "url": "https://git.kernel.org/stable/c/3e47740091b05ac8d7836a33afd8646b6863ca52" }, { "type": "FIX", "url": "https://git.kernel.org/stable/c/32a6cfc67675ee96fe107aeed5af9776fec63f11" }, { "type": "FIX", "url": "https://git.kernel.org/stable/c/5de9e9dd1828db9b8b962f7ca42548bd596deb8a" }, { "type": "FIX", "url": "https://git.kernel.org/stable/c/2525d1ba225b5c167162fa344013c408e8b4de36" }, { "type": "FIX", "url": "https://git.kernel.org/stable/c/f6c30bfe5a49bc38cae985083a11016800708fea" }, { "type": "FIX", "url": "https://git.kernel.org/stable/c/e26b6d39270f5eab0087453d9b544189a38c8564" } ], "database_specific": { "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git", "upstream_modified": "2026-08-15T12:24:41Z", "severity": { "source": "kernel CNA", "cvss_v3_score": 7.8, "cvss_v3_severity": "High", "scenario": "AV:L - The vulnerable path is reached via local setxattr/lsetxattr/fsetxattr (or setfacl\u2192ACL xattrs) into f2fs_setxattr/__f2fs_setxattr; it is not reachable from the network stack or remote filesystem servers.\nAC:L - An attacker who can write xattrs on an f2fs inode can reliably invoke the buggy set path; exploitation does not depend on a race or other condition outside the attacker\u2019s influence once residual non-zero unused xattr bytes exist (common on flash/corrupt or previously dirty xattr regions).\nPR:L - user.* xattrs are enabled by default and only require an unprivileged caller with MAY_WRITE on their own file/dir (typical Android app on f2fs userdata); CAP_SYS_ADMIN is not required.\nUI:N - On a system where f2fs is already mounted (e.g., Android /data), the attacker triggers the bug directly via syscalls with no victim action such as mounting a malicious image.\nS:U - Impact stays within the host kernel\u2019s authority (local memory corruption / privilege boundary of the same OS); this is not a VM, IOMMU, or other cross-authority escape.\nC:H - An unterminated xattr list causes out-of-bounds reads while walking entries (historically KASAN slab-OOB in getxattr and leakage via listxattr), which can disclose arbitrary kernel memory when bounds checks are absent or bypassed.\nI:H - Out-of-bounds parsing of attacker-influenced leftover xattr bytes can corrupt adjacent kernel memory and is treated as enabling write/control-flow impact under the overestimate-severity rule for memory-corruption bugs.\nA:H - The same OOB walks have caused kernel page faults/oopses and hard failures in related f2fs xattr corruption bugs, so availability impact is a full kernel crash." } } }