ext4: refresh inline data size before write operations
In the Linux kernel, the following vulnerability has been resolved: ext4: refresh inline data size before write operations The cached ei->i_inline_size can become stale between the initial size check and when ext4_update_inline_data()/ext4_create_inline_data() use it. Although ext4_get_max_inline_size() reads the correct value at the time of the check, concurrent xattr operations can modify i_inline_size before ext4_write_lock_xattr() is acquired. This causes ext4_update_inline_data() and ext4_create_inline_data() to work with stale capacity values, leading to a BUG_ON() crash in ext4_write_inline_data(): kernel BUG at fs/ext4/inline.c:1331! BUG_ON(pos + len > EXT4_I(inode)->i_inline_size); The race window: 1. ext4_get_max_inline_size() reads i_inline_size = 60 (correct) 2. Size check passes for 50-byte write 3. [Another thread adds xattr, i_inline_size changes to 40] 4. ext4_write_lock_xattr() acquires lock 5. ext4_update_inline_data() uses stale i_inline_size = 60 6. Attempts to write 50 bytes but only 40 bytes actually available 7. BUG_ON() triggers Fix this by recalculating i_inline_size via ext4_find_inline_data_nolock() immediately after acquiring xattr_sem. This ensures ext4_update_inline_data() and ext4_create_inline_data() work with current values that are protected from concurrent modifications. This is similar to commit a54c4613dac1 ("ext4: fix race writing to an inline_data file while its xattrs are changing") which fixed i_inline_off staleness. This patch address
CVE-2025-68264
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-2025-68264
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": "67cf5b09a46f72e048501b84996f2f77bc42e947",
"lessThan": "54ab81ae5f218452e64470cd8a8139bb5880fe2b",
"versionType": "git"
},
{
"status": "affected",
"version": "67cf5b09a46f72e048501b84996f2f77bc42e947",
"lessThan": "43bf001f0fe4e59bba47c897505222f959f4a1cc",
"versionType": "git"
},
{
"status": "affected",
"version": "67cf5b09a46f72e048501b84996f2f77bc42e947",
"lessThan": "89c2c41f0974e530b2d032c3695095aa0559adb1",
"versionType": "git"
},
{
"status": "affected",
"version": "67cf5b09a46f72e048501b84996f2f77bc42e947",
"lessThan": "1687a055a555347b002f406676a1aaae4668f242",
"versionType": "git"
},
{
"status": "affected",
"version": "67cf5b09a46f72e048501b84996f2f77bc42e947",
"lessThan": "210ac60a86a3ad2c76ae60e0dc71c34af6e7ea0b",
"versionType": "git"
},
{
"status": "affected",
"version": "67cf5b09a46f72e048501b84996f2f77bc42e947",
"lessThan": "ca43ea29b4c4d2764aec8a26cffcfb677a871e6e",
"versionType": "git"
},
{
"status": "affected",
"version": "67cf5b09a46f72e048501b84996f2f77bc42e947",
"lessThan": "58df743faf21ceb1880f930aa5dd428e2a5e415d",
"versionType": "git"
},
{
"status": "affected",
"version": "67cf5b09a46f72e048501b84996f2f77bc42e947",
"lessThan": "892e1cf17555735e9d021ab036c36bc7b58b0e3b",
"versionType": "git"
}
],
"programFiles": [
"fs/ext4/inline.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3.8"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "3.8",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.248",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "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"
}
]- Related CVEs
- CVE-2025-68264
Source reference:
/cveMetadata/cveId
Publisher severity
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- Event
- #27115 · Revision 1
- Added to Heist Feed
- Publisher date