CVE-2024-26757
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2024-26757
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-26757.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2024-26757
- Downstream
- Related
- Published
- 2024-04-03T17:00:41Z
- Modified
- 2025-10-21T18:12:46.990418Z
- Severity
-
- 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- md: Don't ignore read-only array in md_check_recovery()
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
md: Don't ignore read-only array in mdcheckrecovery()
Usually if the array is not read-write, mdcheckrecovery() won't register new syncthread in the first place. And if the array is read-write and syncthread is registered, mdsetreadonly() will unregister sync_thread before setting the array read-only. md/raid follow this behavior hence there is no problem.
After commit f52f5c71f3d4 ("md: fix stopping sync thread"), following hang can be triggered by test shell/integrity-caching.sh:
1) array is read-only. dm-raid update super block: rsupdatesbs ro = mddev->ro mddev->ro = 0 -> set array read-write mdupdatesb
2) register new sync thread concurrently.
3) dm-raid set array back to read-only: rsupdatesbs mddev->ro = ro
4) stop the array: raiddtr mdstop stopsyncthread setbit(MDRECOVERYINTR, &mddev->recovery); mdwakeupthreaddirectly(mddev->syncthread); waitevent(..., !testbit(MDRECOVERY_RUNNING, &mddev->recovery))
5) sync thread done: mddosync setbit(MDRECOVERYDONE, &mddev->recovery); mdwakeup_thread(mddev->thread);
6) daemon thread can't unregister sync thread: mdcheckrecovery if (!mdisrdwr(mddev) && !testbit(MDRECOVERYNEEDED, &mddev->recovery)) return; -> -> MDRECOVERY_RUNNING can't be cleared, hence step 4 hang;
The root cause is that dm-raid manipulate 'mddev->ro' by itself, however, dm-raid really should stop sync thread before setting the array read-only. Unfortunately, I need to read more code before I can refacter the handler of 'mddev->ro' in dm-raid, hence let's fix the problem the easy way for now to prevent dm-raid regression.
- References
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedecbfb9f118bce49f571675929160e4ecef91cc8aFixed2ea169c5a0b1134d573d07fc27a16f327ad0e7d3
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedecbfb9f118bce49f571675929160e4ecef91cc8aFixed55a48ad2db64737f7ffc0407634218cc6e4c513b
Affected versions
v4.*
v4.10
v4.10-rc1
v4.10-rc2
v4.10-rc3
v4.10-rc4
v4.10-rc5
v4.10-rc6
v4.10-rc7
v4.10-rc8
v4.11
v4.11-rc1
v4.11-rc2
v4.11-rc3
v4.11-rc4
v4.11-rc5
v4.11-rc6
v4.11-rc7
v4.11-rc8
v4.12
v4.12-rc1
v4.12-rc2
v4.12-rc3
v4.12-rc4
v4.12-rc5
v4.12-rc6
v4.12-rc7
v4.13
v4.13-rc1
v4.13-rc2
v4.13-rc3
v4.13-rc4
v4.13-rc5
v4.13-rc6
v4.13-rc7
v4.14
v4.14-rc1
v4.14-rc2
v4.14-rc3
v4.14-rc4
v4.14-rc5
v4.14-rc6
v4.14-rc7
v4.14-rc8
v4.15
v4.15-rc1
v4.15-rc2
v4.15-rc3
v4.15-rc4
v4.15-rc5
v4.15-rc6
v4.15-rc7
v4.15-rc8
v4.15-rc9
v4.16
v4.16-rc1
v4.16-rc2
v4.16-rc3
v4.16-rc4
v4.16-rc5
v4.16-rc6
v4.16-rc7
v4.17
v4.17-rc1
v4.17-rc2
v4.17-rc3
v4.17-rc4
v4.17-rc5
v4.17-rc6
v4.17-rc7
v4.18
v4.18-rc1
v4.18-rc2
v4.18-rc3
v4.18-rc4
v4.18-rc5
v4.18-rc6
v4.18-rc7
v4.18-rc8
v4.19
v4.19-rc1
v4.19-rc2
v4.19-rc3
v4.19-rc4
v4.19-rc5
v4.19-rc6
v4.19-rc7
v4.19-rc8
v4.20
v4.20-rc1
v4.20-rc2
v4.20-rc3
v4.20-rc4
v4.20-rc5
v4.20-rc6
v4.20-rc7
v4.7
v4.7-rc3
v4.7-rc4
v4.7-rc5
v4.7-rc6
v4.7-rc7
v4.8
v4.8-rc1
v4.8-rc2
v4.8-rc3
v4.8-rc4
v4.8-rc5
v4.8-rc6
v4.8-rc7
v4.8-rc8
v4.9
v4.9-rc1
v4.9-rc2
v4.9-rc3
v4.9-rc4
v4.9-rc5
v4.9-rc6
v4.9-rc7
v4.9-rc8
v5.*
v5.0
v5.0-rc1
v5.0-rc2
v5.0-rc3
v5.0-rc4
v5.0-rc5
v5.0-rc6
v5.0-rc7
v5.0-rc8
v5.1
v5.1-rc1
v5.1-rc2
v5.1-rc3
v5.1-rc4
v5.1-rc5
v5.1-rc6
v5.1-rc7
v5.10
v5.10-rc1
v5.10-rc2
v5.10-rc3
v5.10-rc4
v5.10-rc5
v5.10-rc6
v5.10-rc7
v5.11
v5.11-rc1
v5.11-rc2
v5.11-rc3
v5.11-rc4
v5.11-rc5
v5.11-rc6
v5.11-rc7
v5.12
v5.12-rc1
v5.12-rc1-dontuse
v5.12-rc2
v5.12-rc3
v5.12-rc4
v5.12-rc5
v5.12-rc6
v5.12-rc7
v5.12-rc8
v5.13
v5.13-rc1
v5.13-rc2
v5.13-rc3
v5.13-rc4
v5.13-rc5
v5.13-rc6
v5.13-rc7
v5.14
v5.14-rc1
v5.14-rc2
v5.14-rc3
v5.14-rc4
v5.14-rc5
v5.14-rc6
v5.14-rc7
v5.15
v5.15-rc1
v5.15-rc2
v5.15-rc3
v5.15-rc4
v5.15-rc5
v5.15-rc6
v5.15-rc7
v5.16
v5.16-rc1
v5.16-rc2
v5.16-rc3
v5.16-rc4
v5.16-rc5
v5.16-rc6
v5.16-rc7
v5.16-rc8
v5.17
v5.17-rc1
v5.17-rc2
v5.17-rc3
v5.17-rc4
v5.17-rc5
v5.17-rc6
v5.17-rc7
v5.17-rc8
v5.18
v5.18-rc1
v5.18-rc2
v5.18-rc3
v5.18-rc4
v5.18-rc5
v5.18-rc6
v5.18-rc7
v5.19
v5.19-rc1
v5.19-rc2
v5.19-rc3
v5.19-rc4
v5.19-rc5
v5.19-rc6
v5.19-rc7
v5.19-rc8
v5.2
v5.2-rc1
v5.2-rc2
v5.2-rc3
v5.2-rc4
v5.2-rc5
v5.2-rc6
v5.2-rc7
v5.3
v5.3-rc1
v5.3-rc2
v5.3-rc3
v5.3-rc4
v5.3-rc5
v5.3-rc6
v5.3-rc7
v5.3-rc8
v5.4
v5.4-rc1
v5.4-rc2
v5.4-rc3
v5.4-rc4
v5.4-rc5
v5.4-rc6
v5.4-rc7
v5.4-rc8
v5.5
v5.5-rc1
v5.5-rc2
v5.5-rc3
v5.5-rc4
v5.5-rc5
v5.5-rc6
v5.5-rc7
v5.6
v5.6-rc1
v5.6-rc2
v5.6-rc3
v5.6-rc4
v5.6-rc5
v5.6-rc6
v5.6-rc7
v5.7
v5.7-rc1
v5.7-rc2
v5.7-rc3
v5.7-rc4
v5.7-rc5
v5.7-rc6
v5.7-rc7
v5.8
v5.8-rc1
v5.8-rc2
v5.8-rc3
v5.8-rc4
v5.8-rc5
v5.8-rc6
v5.8-rc7
v5.9
v5.9-rc1
v5.9-rc2
v5.9-rc3
v5.9-rc4
v5.9-rc5
v5.9-rc6
v5.9-rc7
v5.9-rc8
v6.*
v6.0
v6.0-rc1
v6.0-rc2
v6.0-rc3
v6.0-rc4
v6.0-rc5
v6.0-rc6
v6.0-rc7
v6.1
v6.1-rc1
v6.1-rc2
v6.1-rc3
v6.1-rc4
v6.1-rc5
v6.1-rc6
v6.1-rc7
v6.1-rc8
v6.2
v6.2-rc1
v6.2-rc2
v6.2-rc3
v6.2-rc4
v6.2-rc5
v6.2-rc6
v6.2-rc7
v6.2-rc8
v6.3
v6.3-rc1
v6.3-rc2
v6.3-rc3
v6.3-rc4
v6.3-rc5
v6.3-rc6
v6.3-rc7
v6.4
v6.4-rc1
v6.4-rc2
v6.4-rc3
v6.4-rc4
v6.4-rc5
v6.4-rc6
v6.4-rc7
v6.5
v6.5-rc1
v6.5-rc2
v6.5-rc3
v6.5-rc4
v6.5-rc5
v6.5-rc6
v6.5-rc7
v6.6
v6.6-rc1
v6.6-rc2
v6.6-rc3
v6.6-rc4
v6.6-rc5
v6.6-rc6
v6.6-rc7
v6.7
v6.7-rc1
v6.7-rc2
v6.7-rc3
v6.7-rc4
v6.7-rc5
v6.7-rc6
v6.7-rc7
v6.7-rc8
v6.7.1
v6.7.2
v6.7.3
v6.7.4
v6.7.5
v6.7.6
v6.8-rc1
Database specific
vanir_signatures
[
{
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@2ea169c5a0b1134d573d07fc27a16f327ad0e7d3",
"target": {
"file": "drivers/md/md.c"
},
"signature_type": "Line",
"deprecated": false,
"digest": {
"line_hashes": [
"51875062674802639080570421002082963039",
"147455009612227496026495345361000513064",
"55480160997835376006104180814619795462",
"54429319178508415129169784273894243440",
"292695598806442858279603530327060121534",
"103655806225354460819757461454612397659",
"121731383947216411940526209643721882787",
"305370741200640733564105121776174256721",
"3655471596903549166711772230272375140",
"99173623455851864578781785359200165655",
"100370895212316450994542936397033578767",
"251439056819072176145933305309328076004",
"205900849428195336889892884369371200053",
"115073152923557056178636903805526942931",
"243498305889229961142404203537846717663",
"166354700164272485453831897349571417315",
"249615055233655078594258931477727507667",
"336175119148437467853156373827887432988",
"11814822628225411001378232750110566339",
"329862472169024019918216111133601653124",
"162337090225286619361869858817377940323"
],
"threshold": 0.9
},
"signature_version": "v1",
"id": "CVE-2024-26757-4e606d85"
},
{
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@55a48ad2db64737f7ffc0407634218cc6e4c513b",
"target": {
"function": "md_check_recovery",
"file": "drivers/md/md.c"
},
"signature_type": "Function",
"deprecated": false,
"digest": {
"function_hash": "147946770650260144420238322102292393165",
"length": 2836.0
},
"signature_version": "v1",
"id": "CVE-2024-26757-89e5d037"
},
{
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@55a48ad2db64737f7ffc0407634218cc6e4c513b",
"target": {
"file": "drivers/md/md.c"
},
"signature_type": "Line",
"deprecated": false,
"digest": {
"line_hashes": [
"51875062674802639080570421002082963039",
"147455009612227496026495345361000513064",
"55480160997835376006104180814619795462",
"54429319178508415129169784273894243440",
"292695598806442858279603530327060121534",
"103655806225354460819757461454612397659",
"121731383947216411940526209643721882787",
"305370741200640733564105121776174256721",
"3655471596903549166711772230272375140",
"99173623455851864578781785359200165655",
"100370895212316450994542936397033578767",
"251439056819072176145933305309328076004",
"205900849428195336889892884369371200053",
"115073152923557056178636903805526942931",
"243498305889229961142404203537846717663",
"166354700164272485453831897349571417315",
"249615055233655078594258931477727507667",
"336175119148437467853156373827887432988",
"11814822628225411001378232750110566339",
"329862472169024019918216111133601653124",
"162337090225286619361869858817377940323"
],
"threshold": 0.9
},
"signature_version": "v1",
"id": "CVE-2024-26757-8cfd1a52"
},
{
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@2ea169c5a0b1134d573d07fc27a16f327ad0e7d3",
"target": {
"function": "md_check_recovery",
"file": "drivers/md/md.c"
},
"signature_type": "Function",
"deprecated": false,
"digest": {
"function_hash": "147946770650260144420238322102292393165",
"length": 2836.0
},
"signature_version": "v1",
"id": "CVE-2024-26757-c6199722"
}
]