ext4: fix invalid free tracking in ext4_xattr_move_to_block()
In the Linux kernel, the following vulnerability has been resolved: ext4: fix invalid free tracking in ext4_xattr_move_to_block() In ext4_xattr_move_to_block(), the value of the extended attribute which we need to move to an external block may be allocated by kvmalloc() if the value is stored in an external inode. So at the end of the function the code tried to check if this was the case by testing entry->e_value_inum. However, at this point, the pointer to the xattr entry is no longer valid, because it was removed from the original location where it had been stored. So we could end up calling kvfree() on a pointer which was not allocated by kvmalloc(); or we could also potentially leak memory by not freeing the buffer when it should be freed. Fix this by storing whether it should be freed in a separate variable.
CVE-2023-54062
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-2023-54062
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": "c7851208abffe5ae4deb01cf48763911dc14fc67",
"lessThan": "76887be2a96193cd11be818551b8934ecdb3123f",
"versionType": "git"
},
{
"status": "affected",
"version": "f5cdc6a7339f250d44d4d469ed7a474ac0d6c7a7",
"lessThan": "f30f3391d089dc91aef91d08f4b04a6c0df2b067",
"versionType": "git"
},
{
"status": "affected",
"version": "3b28c799a1334adb5a19f42f03abe0d8cbb05938",
"lessThan": "ba04d6af5ac440a6d5a2d35dc1d8e2cb0323550a",
"versionType": "git"
},
{
"status": "affected",
"version": "d738789ae9ec47d3458a008788f3cdc862ebf0cb",
"lessThan": "1a8822343e67432b658145d2760a524c884da9d4",
"versionType": "git"
},
{
"status": "affected",
"version": "a6744e14ce7045ab1a728bde9595f62fbd39f1d2",
"lessThan": "8beaa3cb293a8f7bacf711cf52201d59859dbc40",
"versionType": "git"
},
{
"status": "affected",
"version": "8b6d06b3be7648b3b0f428558293ddf6e2cb94bf",
"lessThan": "c5fa4eedddd1c8342ce533cb401c0e693e55b4e3",
"versionType": "git"
},
{
"status": "affected",
"version": "d2efaf8c870c7067b8d1779773134f3481cd8f68",
"lessThan": "a18670395e5f28acddeca037c5e4bd2ea961b70a",
"versionType": "git"
},
{
"status": "affected",
"version": "1e9d62d252812575ded7c620d8fc67c32ff06c16",
"lessThan": "b2fab1807d26acd1c6115b95b5eddd697d84751b",
"versionType": "git"
},
{
"status": "affected",
"version": "1e9d62d252812575ded7c620d8fc67c32ff06c16",
"lessThan": "b87c7cdf2bed4928b899e1ce91ef0d147017ba45",
"versionType": "git"
},
{
"status": "affected",
"version": "4.14.308",
"lessThan": "4.14.315",
"versionType": "semver"
},
{
"status": "affected",
"version": "4.19.276",
"lessThan": "4.19.283",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.4.235",
"lessThan": "5.4.243",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.10.173",
"lessThan": "5.10.180",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.15.99",
"lessThan": "5.15.112",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.1.16",
"lessThan": "6.1.29",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.2.3",
"lessThan": "6.2.16",
"versionType": "semver"
}
],
"programFiles": [
"fs/ext4/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": "6.3"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.3",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "4.14.315",
"versionType": "semver",
"lessThanOrEqual": "4.14.*"
},
{
"status": "unaffected",
"version": "4.19.283",
"versionType": "semver",
"lessThanOrEqual": "4.19.*"
},
{
"status": "unaffected",
"version": "5.4.243",
"versionType": "semver",
"lessThanOrEqual": "5.4.*"
},
{
"status": "unaffected",
"version": "5.10.180",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.112",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.29",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.2.16",
"versionType": "semver",
"lessThanOrEqual": "6.2.*"
},
{
"status": "unaffected",
"version": "6.3.3",
"versionType": "semver",
"lessThanOrEqual": "6.3.*"
},
{
"status": "unaffected",
"version": "6.4",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/ext4/xattr.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2023-54062
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #30340 · Revision 1
- Added to Heist Feed
- Publisher date