jffs2: prevent xattr node from overflowing the eraseblock
In the Linux kernel, the following vulnerability has been resolved: jffs2: prevent xattr node from overflowing the eraseblock Add a check to make sure that the requested xattr node size is no larger than the eraseblock minus the cleanmarker. Unlike the usual inode nodes, the xattr nodes aren't split into parts and spread across multiple eraseblocks, which means that a xattr node must not occupy more than one eraseblock. If the requested xattr value is too large, the xattr node can spill onto the next eraseblock, overwriting the nodes and causing errors such as: jffs2: argh. node added in wrong place at 0x0000b050(2) jffs2: nextblock 0x0000a000, expected at 0000b00c jffs2: error: (823) do_verify_xattr_datum: node CRC failed at 0x01e050, read=0xfc892c93, calc=0x000000 jffs2: notice: (823) jffs2_get_inode_nodes: Node header CRC failed at 0x01e00c. {848f,2fc4,0fef511f,59a3d171} jffs2: Node at 0x0000000c with length 0x00001044 would run over the end of the erase block jffs2: Perhaps the file system was created with the wrong erase size? jffs2: jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00000010: 0x1044 instead This breaks the filesystem and can lead to KASAN crashes such as: BUG: KASAN: slab-out-of-bounds in jffs2_sum_add_kvec+0x125e/0x15d0 Read of size 4 at addr ffff88802c31e914 by task repro/830 CPU: 0 PID: 830 Comm: repro Not tainted 6.9.0-rc3+ #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Arch Linux 1.16.3-1-1 04/01/2014 Call Trace: dump_stac
CVE-2024-38599
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2024-38599
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "aa98d7cf59b5b0764d3502662053489585faf2fe",
"lessThan": "2904e1d9b64f72d291095e3cbb31634f08788b11",
"versionType": "git"
},
{
"status": "affected",
"version": "aa98d7cf59b5b0764d3502662053489585faf2fe",
"lessThan": "526235dffcac74c7823ed504dfac4f88d84ba5df",
"versionType": "git"
},
{
"status": "affected",
"version": "aa98d7cf59b5b0764d3502662053489585faf2fe",
"lessThan": "f0eea095ce8c959b86e1e57fe36ca4fea5ae54f8",
"versionType": "git"
},
{
"status": "affected",
"version": "aa98d7cf59b5b0764d3502662053489585faf2fe",
"lessThan": "a1d21bcd78cf4a4353e1e835789429c6b76aca8b",
"versionType": "git"
},
{
"status": "affected",
"version": "aa98d7cf59b5b0764d3502662053489585faf2fe",
"lessThan": "f06969df2e40ab1dc8f4364a5de967830c74a098",
"versionType": "git"
},
{
"status": "affected",
"version": "aa98d7cf59b5b0764d3502662053489585faf2fe",
"lessThan": "af82d8d2179b7277ad627c39e7e0778f1c86ccdb",
"versionType": "git"
},
{
"status": "affected",
"version": "aa98d7cf59b5b0764d3502662053489585faf2fe",
"lessThan": "8d431391320c5c5398ff966fb3a95e68a7def275",
"versionType": "git"
},
{
"status": "affected",
"version": "aa98d7cf59b5b0764d3502662053489585faf2fe",
"lessThan": "978a12c91b38bf1a213e567f3c20e2beef215f07",
"versionType": "git"
},
{
"status": "affected",
"version": "aa98d7cf59b5b0764d3502662053489585faf2fe",
"lessThan": "c6854e5a267c28300ff045480b5a7ee7f6f1d913",
"versionType": "git"
}
],
"programFiles": [
"fs/jffs2/xattr.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.18"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "2.6.18",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "4.19.316",
"versionType": "semver",
"lessThanOrEqual": "4.19.*"
},
{
"status": "unaffected",
"version": "5.4.278",
"versionType": "semver",
"lessThanOrEqual": "5.4.*"
},
{
"status": "unaffected",
"version": "5.10.219",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.161",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.93",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.33",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.8.12",
"versionType": "semver",
"lessThanOrEqual": "6.8.*"
},
{
"status": "unaffected",
"version": "6.9.3",
"versionType": "semver",
"lessThanOrEqual": "6.9.*"
},
{
"status": "unaffected",
"version": "6.10",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/jffs2/xattr.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2024-38599
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #26617 · Revision 1
- Added to Heist Feed
- Publisher date