CVE-2022-26362
published 2022-06-09CVE-2022-26362: x86 pv: Race condition in typeref acquisition Xen maintains a type reference count for pages, in addition to a regular reference count. This scheme is used to…
PriorityP427medium6.4CVSS 3.1
AVLACHPRHUINSUCHIHAH
EPSS
0.38%
30.1th percentile
x86 pv: Race condition in typeref acquisition Xen maintains a type reference count for pages, in addition to a regular reference count. This scheme is used to maintain invariants required for Xen's safety, e.g. PV guests may not have direct writeable access to pagetables; updates need auditing by Xen. Unfortunately, the logic for acquiring a type reference has a race condition, whereby a safely TLB flush is issued too early and creates a window where the guest can re-establish the read/write mapping before writeability is prohibited.
Affected
8 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | debian_linux | — | — |
| debian | xen | < xen 4.16.2-1 (bookworm) | xen 4.16.2-1 (bookworm) |
| fedoraproject | fedora | — | — |
| fedoraproject | fedora | — | — |
| xen | xen | >= 0 < 4.14.5+24-g87d90d511c-1 | 4.14.5+24-g87d90d511c-1 |
| xen | xen | >= 0 < 4.16.2-1 | 4.16.2-1 |
| xen | xen | >= 0 < 4.16.2-1 | 4.16.2-1 |
| xen | xen | >= 0 < 4.16.2-1 | 4.16.2-1 |
CVSS provenance
nvdv3.16.4MEDIUMCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
nvdv2.06.9MEDIUMAV:L/AC:M/Au:N/C:C/I:C/A:C
osv6.4MEDIUM
vendor_debian6.4MEDIUM
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Debian
CVE-2022-26362: xen - x86 pv: Race condition in typeref acquisition Xen maintains a type reference cou...
vendor_debian·2022·CVSS 6.4
CVE-2022-26362 [MEDIUM] CVE-2022-26362: xen - x86 pv: Race condition in typeref acquisition Xen maintains a type reference cou...
x86 pv: Race condition in typeref acquisition Xen maintains a type reference count for pages, in addition to a regular reference count. This scheme is used to maintain invariants required for Xen's safety, e.g. PV guests may not have direct writeable access to pagetables; updates need auditing by Xen. Unfortunately, the logic for acquiring a type reference has a race condition, whereby a safely TLB flush is issued too early and creates a window where the guest can re-establish the read/write mapping before writeability is prohibited.
Scope: local
bookworm: resolved (fixed in 4.16.2-1)
bullseye: resolved (fixed in 4.14.5+24-g87d90d511c-1)
forky: resolved (fixed in 4.16.2-1)
sid: resolved (fixed in 4.16.2-1)
trixie: resolved (fixed in 4.16.2-1)
GHSA
GHSA-2mfj-vmvj-q937: x86 pv: Race condition in typeref acquisition Xen maintains a type reference count for pages, in addition to a regular reference count
ghsa_unreviewed·2022-06-10
CVE-2022-26362 [MEDIUM] CWE-362 GHSA-2mfj-vmvj-q937: x86 pv: Race condition in typeref acquisition Xen maintains a type reference count for pages, in addition to a regular reference count
x86 pv: Race condition in typeref acquisition Xen maintains a type reference count for pages, in addition to a regular reference count. This scheme is used to maintain invariants required for Xen's safety, e.g. PV guests may not have direct writeable access to pagetables; updates need auditing by Xen. Unfortunately, the logic for acquiring a type reference has a race condition, whereby a safely TLB flush is issued too early and creates a window where the guest can re-establish the read/write mapping before writeability is prohibited.
OSV
CVE-2022-26362: x86 pv: Race condition in typeref acquisition Xen maintains a type reference count for pages, in addition to a regular reference count
osv·2022-06-09·CVSS 6.4
CVE-2022-26362 [MEDIUM] CVE-2022-26362: x86 pv: Race condition in typeref acquisition Xen maintains a type reference count for pages, in addition to a regular reference count
x86 pv: Race condition in typeref acquisition Xen maintains a type reference count for pages, in addition to a regular reference count. This scheme is used to maintain invariants required for Xen's safety, e.g. PV guests may not have direct writeable access to pagetables; updates need auditing by Xen. Unfortunately, the logic for acquiring a type reference has a race condition, whereby a safely TLB flush is issued too early and creates a window where the guest can re-establish the read/write mapping before writeability is prohibited.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
http://packetstormsecurity.com/files/167718/Xen-TLB-Flush-Bypass.htmlhttp://www.openwall.com/lists/oss-security/2022/06/09/3http://xenbits.xen.org/xsa/advisory-401.htmlhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OH65U6FTTB5MLH5A6Q3TW7KVCGOG4MYI/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RKRXZ4LHGCGMOG24ZCEJNY6R2BTS4S2Q/https://security.gentoo.org/glsa/202208-23https://www.debian.org/security/2022/dsa-5184https://xenbits.xenproject.org/xsa/advisory-401.txthttp://packetstormsecurity.com/files/167718/Xen-TLB-Flush-Bypass.htmlhttp://www.openwall.com/lists/oss-security/2022/06/09/3http://xenbits.xen.org/xsa/advisory-401.htmlhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OH65U6FTTB5MLH5A6Q3TW7KVCGOG4MYI/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RKRXZ4LHGCGMOG24ZCEJNY6R2BTS4S2Q/https://security.gentoo.org/glsa/202208-23https://www.debian.org/security/2022/dsa-5184https://xenbits.xenproject.org/xsa/advisory-401.txt
2022-06-09
Published