exec: don't WARN for racy path_noexec check
In the Linux kernel, the following vulnerability has been resolved: exec: don't WARN for racy path_noexec check Both i_mode and noexec checks wrapped in WARN_ON stem from an artifact of the previous implementation. They used to legitimately check for the condition, but that got moved up in two commits: 633fb6ac3980 ("exec: move S_ISREG() check earlier") 0fd338b2d2cd ("exec: move path_noexec() check earlier") Instead of being removed said checks are WARN_ON'ed instead, which has some debug value. However, the spurious path_noexec check is racy, resulting in unwarranted warnings should someone race with setting the noexec flag. One can note there is more to perm-checking whether execve is allowed and none of the conditions are guaranteed to still hold after they were tested for. Additionally this does not validate whether the code path did any perm checking to begin with -- it will pass if the inode happens to be regular. Keep the redundant path_noexec() check even though it's mindless nonsense checking for guarantee that isn't given so drop the WARN. Reword the commentary and do small tidy ups while here. [brauner: keep redundant path_noexec() check]
CVE-2024-50010
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-2024-50010
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": "0fd338b2d2cdf827091ae819ae90ad760b94ad0c",
"lessThan": "c9b77438077d5a20c79ead95bcdaf9bd4797baaf",
"versionType": "git"
},
{
"status": "affected",
"version": "0fd338b2d2cdf827091ae819ae90ad760b94ad0c",
"lessThan": "b723f96407a0a078cf75970e4dbf16b46d286a61",
"versionType": "git"
},
{
"status": "affected",
"version": "0fd338b2d2cdf827091ae819ae90ad760b94ad0c",
"lessThan": "0bdf77be2330062b3a64f2bec39f62ab874a6796",
"versionType": "git"
},
{
"status": "affected",
"version": "0fd338b2d2cdf827091ae819ae90ad760b94ad0c",
"lessThan": "0d16f53c91111cec914f0811fcc526a2ba77b20d",
"versionType": "git"
},
{
"status": "affected",
"version": "0fd338b2d2cdf827091ae819ae90ad760b94ad0c",
"lessThan": "0d196e7589cefe207d5d41f37a0a28a1fdeeb7c6",
"versionType": "git"
}
],
"programFiles": [
"fs/exec.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.9"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.9",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.229",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.170",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.115",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.59",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/exec.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2024-50010
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #26771 · Revision 1
- Added to Heist Feed
- Publisher date