CVE-2022-49649
xen/netback: avoid entering xenvif_rx_next_skb() with an empty rx queue
En bref
- Source
- NVD
- EPSS
- EPSS 0.27 % · centile 18 ()
- État
- PUBLISHED
- Publiée
- Mise à jour
- Attribuée par
- Linux
- Statut NVD
- Modified
Description
In the Linux kernel, the following vulnerability has been resolved: xen/netback: avoid entering xenvif_rx_next_skb() with an empty rx queue xenvif_rx_next_skb() is expecting the rx queue not being empty, but in case the loop in xenvif_rx_action() is doing multiple iterations, the availability of another skb in the rx queue is not being checked. This can lead to crashes: [40072.537261] BUG: unable to handle kernel NULL pointer dereference at 0000000000000080 [40072.537407] IP: xenvif_rx_skb+0x23/0x590 [xen_netback] [40072.537534] PGD 0 P4D 0 [40072.537644] Oops: 0000 [#1] SMP NOPTI [40072.537749] CPU: 0 PID: 12505 Comm: v1-c40247-q2-gu Not tainted 4.12.14-122.121-default #1 SLE12-SP5 [40072.537867] Hardware name: HP ProLiant DL580 Gen9/ProLiant DL580 Gen9, BIOS U17 11/23/2021 [40072.537999] task: ffff880433b38100 task.stack: ffffc90043d40000 [40072.538112] RIP: e030:xenvif_rx_skb+0x23/0x590 [xen_netback] [40072.538217] RSP: e02b:ffffc90043d43de0 EFLAGS: 00010246 [40072.538319] RAX: 0000000000000000 RBX: ffffc90043cd7cd0 RCX: 00000000000000f7 [40072.538430] RDX: 0000000000000000 RSI: 0000000000000006 RDI: ffffc90043d43df8 [40072.538531] RBP: 000000000000003f R08: 000077ff80000000 R09: 0000000000000008 [40072.538644] R10: 0000000000007ff0 R11: 00000000000008f6 R12: ffffc90043ce2708 [40072.538745] R13: 0000000000000000 R14: ffffc90043d43ed0 R15: ffff88043ea748c0 [40072.538861] FS: 0000000000000000(0000) GS:ffff880484600000(0000) knlGS:0000000000000000 [40072.538988] CS: e033 DS: 0000 ES: 0000 CR0: 0000000080050033 [40072.539088] CR2: 0000000000000080 CR3: 0000000407ac8000 CR4: 0000000000040660 [40072.539211] Call Trace: [40072.539319] xenvif_rx_action+0x71/0x90 [xen_netback] [40072.539429] xenvif_kthread_guest_rx+0x14a/0x29c [xen_netback] Fix that by stopping the loop in case the rx queue becomes empty.
Faiblesses (CWE)
- CWE-476 — Déréférencement de pointeur nul
Références
- https://git.kernel.org/stable/c/c0fcceb5f3f1ec197c014fe218c2f28108cacd27
- https://git.kernel.org/stable/c/d5320c6a27aa975aff740f9cb481dcbde48f4348
- https://git.kernel.org/stable/c/5a071aefd6414af5a20321ab58a0557b81993687
- https://git.kernel.org/stable/c/7425479d20f9e96f7c3ec8e8a93fe0d7478724cb
- https://git.kernel.org/stable/c/b9c32a6886af79d6e0ad87a7b01800ed079cdd02
- https://git.kernel.org/stable/c/b99174ac57fe5d8867448c03b23828e63f24cb1c
- https://git.kernel.org/stable/c/f0b5c819b062df8bf5f2acf4697e3871cb3722da
- https://git.kernel.org/stable/c/94e8100678889ab428e68acadf042de723f094b9
Scores
| Version | Score | Vecteur | Évalué par |
|---|---|---|---|
| CVSS 3.1 | MEDIUM 5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H | CISA-ADP |
| CVSS 3.1 | MEDIUM 5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H | NVD · nvd@nist.gov (Primary) |
| CVSS 3.1 | MEDIUM 5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H | NVD · 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary) |
Références européennes
- ENISA EUVD · EUVD-2022-54583
- GCVE · GCVE-0-2022-49649
Avis du CERT-FR
- CERTFR-2025-AVI-0336 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0307 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0252 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
Configurations affectées (CPE NVD)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 4.9 < 4.9.324cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 4.10 < 4.14.289cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 4.15 < 4.19.253cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 4.20 < 5.4.207cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.5 < 5.10.132cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.11 < 5.15.56cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.16 < 5.18.13cpe:2.3:o:linux:linux_kernel:5.19:rc1:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:5.19:rc2:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:5.19:rc3:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:5.19:rc4:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:5.19:rc5:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:5.19:rc6:*:*:*:*:*:*
Produits affectés
| Produit | Versions |
|---|---|
| Linux · Linux | affected 98f6d57ced73b723551568262019f1d6c8771f20 < c0fcceb5f3f1ec197c014fe218c2f28108cacd27 ; affected 98f6d57ced73b723551568262019f1d6c8771f20 < d5320c6a27aa975aff740f9cb481dcbde48f4348 ; affected 98f6d57ced73b723551568262019f1d6c8771f20 < 5a071aefd6414af5a20321ab58a0557b81993687 ; affected 98f6d57ced73b723551568262019f1d6c8771f20 < 7425479d20f9e96f7c3ec8e8a93fe0d7478724cb ; affected 98f6d57ced73b723551568262019f1d6c8771f20 < b9c32a6886af79d6e0ad87a7b01800ed079cdd02 ; affected 98f6d57ced73b723551568262019f1d6c8771f20 < b99174ac57fe5d8867448c03b23828e63f24cb1c |
| Linux · Linux | affected 4.9 ; unaffected 0 < 4.9 ; unaffected 4.9.324 ≤ 4.9.* ; unaffected 4.14.289 ≤ 4.14.* ; unaffected 4.19.253 ≤ 4.19.* ; unaffected 5.4.207 ≤ 5.4.* |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |