CVE-2023-52564
published 2024-03-02CVE-2023-52564: In the Linux kernel, the following vulnerability has been resolved: Revert "tty: n_gsm: fix UAF in gsm_cleanup_mux" This reverts commit…
PriorityP419medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.24%
14.8th percentile
In the Linux kernel, the following vulnerability has been resolved:
Revert "tty: n_gsm: fix UAF in gsm_cleanup_mux"
This reverts commit 9b9c8195f3f0d74a826077fc1c01b9ee74907239.
The commit above is reverted as it did not solve the original issue.
gsm_cleanup_mux() tries to free up the virtual ttys by calling
gsm_dlci_release() for each available DLCI. There, dlci_put() is called to
decrease the reference counter for the DLCI via tty_port_put() which
finally calls gsm_dlci_free(). This already clears the pointer which is
being checked in gsm_cleanup_mux() before calling gsm_dlci_release().
Therefore, it is not necessary to clear this pointer in gsm_cleanup_mux()
as done in the reverted commit. The commit introduces a null pointer
dereference:
? __die+0x1f/0x70
? page_fault_oops+0x156/0x420
? search_exception_tables+0x37/0x50
? fixup_exception+0x21/0x310
? exc_page_fault+0x69/0x150
? asm_exc_page_fault+0x26/0x30
? tty_port_put+0x19/0xa0
gsmtty_cleanup+0x29/0x80 [n_gsm]
release_one_tty+0x37/0xe0
process_one_work+0x1e6/0x3e0
worker_thread+0x4c/0x3d0
? __pfx_worker_thread+0x10/0x10
kthread+0xe1/0x110
? __pfx_kthread+0x10/0x10
ret_from_fork+0x2f/0x50
? __pfx_kthread+0x10/0x10
ret_from_fork_asm+0x1b/0x30
The actual issue is that nothing guards dlci_put() from being called
multiple times while the tty driver was triggered but did not yet finished
calling gsm_dlci_free().
Affected
21 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 6.1.64-1 (bookworm) | linux 6.1.64-1 (bookworm) |
| linux | linux | — | — |
| linux | linux | — | — |
| linux | linux | >= 5.10.190 < 5.10.198 | 5.10.198 |
| linux | linux | >= 5.15.124 < 5.15.134 | 5.15.134 |
| linux | linux | >= 5138c228311a863c3cf937b94a3ab4c87f1f70c4 < a48d2bcd23f2c98d575bc2f9b7a3fbd16aeea9eb | a48d2bcd23f2c98d575bc2f9b7a3fbd16aeea9eb |
| linux | linux | >= 6.1.43 < 6.1.56 | 6.1.56 |
| linux | linux | >= 6.4.8 < 6.5 | 6.5 |
| linux | linux | >= 8fc0eabaa73bbd9bd705577071564616da5c8c61 < 6d5c8862932d31a810b6545f7d69ecc124402c6e | 6d5c8862932d31a810b6545f7d69ecc124402c6e |
| linux | linux | >= 9615ca54bc138e35353a001e8b5d4824dce72188 < c61d0b87a7028c2c10faffc524d748334c7b9827 | c61d0b87a7028c2c10faffc524d748334c7b9827 |
| linux | linux | >= 9b9c8195f3f0d74a826077fc1c01b9ee74907239 < 2bff660e0ff349dee84dc4f6f6d10da4497f5b28 | 2bff660e0ff349dee84dc4f6f6d10da4497f5b28 |
| linux | linux | >= 9b9c8195f3f0d74a826077fc1c01b9ee74907239 < 29346e217b8ab8a52889b88f00b268278d6b7668 | 29346e217b8ab8a52889b88f00b268278d6b7668 |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 0 < 5.10.205-1 | 5.10.205-1 |
| linux | linux_kernel | >= 0 < 6.1.64-1 | 6.1.64-1 |
| linux | linux_kernel | >= 0 < 6.5.6-1 | 6.5.6-1 |
| linux | linux_kernel | >= 0 < 6.5.6-1 | 6.5.6-1 |
| linux | linux_kernel | >= 5.10.190 < 5.10.198 | 5.10.198 |
| linux | linux_kernel | >= 5.15.124 < 5.15.134 | 5.15.134 |
| linux | linux_kernel | >= 6.1.43 < 6.1.56 | 6.1.56 |
| linux | linux_kernel | >= 6.5 < 6.5.6 | 6.5.6 |
CVSS provenance
nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv5.5MEDIUM
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
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Red Hat
kernel: tty: n_gsm: use-after-free in gsm_cleanup_mux()
vendor_redhat·2024-03-02·CVSS 5.5
CVE-2023-52564 [MEDIUM] CWE-416 kernel: tty: n_gsm: use-after-free in gsm_cleanup_mux()
kernel: tty: n_gsm: use-after-free in gsm_cleanup_mux()
In the Linux kernel, the following vulnerability has been resolved:
Revert "tty: n_gsm: fix UAF in gsm_cleanup_mux"
This reverts commit 9b9c8195f3f0d74a826077fc1c01b9ee74907239.
The commit above is reverted as it did not solve the original issue.
gsm_cleanup_mux() tries to free up the virtual ttys by calling
gsm_dlci_release() for each available DLCI. There, dlci_put() is called to
decrease the reference counter for the DLCI via tty_port_put() which
finally calls gsm_dlci_free(). This already clears the pointer which is
being checked in gsm_cleanup_mux() before calling gsm_dlci_release().
Therefore, it is not necessary to clear this pointer in gsm_cleanup_mux()
as done in the reverted commit. The commit introduces a null pointer
dere
Debian
CVE-2023-52564: linux - In the Linux kernel, the following vulnerability has been resolved: Revert "tty...
vendor_debian·2023·CVSS 5.5
CVE-2023-52564 [MEDIUM] CVE-2023-52564: linux - In the Linux kernel, the following vulnerability has been resolved: Revert "tty...
In the Linux kernel, the following vulnerability has been resolved: Revert "tty: n_gsm: fix UAF in gsm_cleanup_mux" This reverts commit 9b9c8195f3f0d74a826077fc1c01b9ee74907239. The commit above is reverted as it did not solve the original issue. gsm_cleanup_mux() tries to free up the virtual ttys by calling gsm_dlci_release() for each available DLCI. There, dlci_put() is called to decrease the reference counter for the DLCI via tty_port_put() which finally calls gsm_dlci_free(). This already clears the pointer which is being checked in gsm_cleanup_mux() before calling gsm_dlci_release(). Therefore, it is not necessary to clear this pointer in gsm_cleanup_mux() as done in the reverted commit. The commit introduces a null pointer dereference: ? __die+0x1f/0x70 ? page_fault_oops+0x156/0x420
GHSA
GHSA-g7pr-gf5r-fx64: In the Linux kernel, the following vulnerability has been resolved:
Revert "tty: n_gsm: fix UAF in gsm_cleanup_mux"
This reverts commit 9b9c8195f3f0
ghsa_unreviewed·2024-03-03
CVE-2023-52564 [MEDIUM] CWE-476 GHSA-g7pr-gf5r-fx64: In the Linux kernel, the following vulnerability has been resolved:
Revert "tty: n_gsm: fix UAF in gsm_cleanup_mux"
This reverts commit 9b9c8195f3f0
In the Linux kernel, the following vulnerability has been resolved:
Revert "tty: n_gsm: fix UAF in gsm_cleanup_mux"
This reverts commit 9b9c8195f3f0d74a826077fc1c01b9ee74907239.
The commit above is reverted as it did not solve the original issue.
gsm_cleanup_mux() tries to free up the virtual ttys by calling
gsm_dlci_release() for each available DLCI. There, dlci_put() is called to
decrease the reference counter for the DLCI via tty_port_put() which
finally calls gsm_dlci_free(). This already clears the pointer which is
being checked in gsm_cleanup_mux() before calling gsm_dlci_release().
Therefore, it is not necessary to clear this pointer in gsm_cleanup_mux()
as done in the reverted commit. The commit introduces a null pointer
dereference:
? __die+0x1f/0x70
? page_fault_oops+0x156/0
OSV
CVE-2023-52564: In the Linux kernel, the following vulnerability has been resolved: Revert "tty: n_gsm: fix UAF in gsm_cleanup_mux" This reverts commit 9b9c8195f3f0d7
osv·2024-03-02·CVSS 5.5
CVE-2023-52564 [MEDIUM] CVE-2023-52564: In the Linux kernel, the following vulnerability has been resolved: Revert "tty: n_gsm: fix UAF in gsm_cleanup_mux" This reverts commit 9b9c8195f3f0d7
In the Linux kernel, the following vulnerability has been resolved: Revert "tty: n_gsm: fix UAF in gsm_cleanup_mux" This reverts commit 9b9c8195f3f0d74a826077fc1c01b9ee74907239. The commit above is reverted as it did not solve the original issue. gsm_cleanup_mux() tries to free up the virtual ttys by calling gsm_dlci_release() for each available DLCI. There, dlci_put() is called to decrease the reference counter for the DLCI via tty_port_put() which finally calls gsm_dlci_free(). This already clears the pointer which is being checked in gsm_cleanup_mux() before calling gsm_dlci_release(). Therefore, it is not necessary to clear this pointer in gsm_cleanup_mux() as done in the reverted commit. The commit introduces a null pointer dereference: ? __die+0x1f/0x70 ? page_fault_oops+0x156/0x420
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
https://git.kernel.org/stable/c/29346e217b8ab8a52889b88f00b268278d6b7668https://git.kernel.org/stable/c/2bff660e0ff349dee84dc4f6f6d10da4497f5b28https://git.kernel.org/stable/c/6d5c8862932d31a810b6545f7d69ecc124402c6ehttps://git.kernel.org/stable/c/a48d2bcd23f2c98d575bc2f9b7a3fbd16aeea9ebhttps://git.kernel.org/stable/c/c61d0b87a7028c2c10faffc524d748334c7b9827https://git.kernel.org/stable/c/29346e217b8ab8a52889b88f00b268278d6b7668https://git.kernel.org/stable/c/2bff660e0ff349dee84dc4f6f6d10da4497f5b28https://git.kernel.org/stable/c/6d5c8862932d31a810b6545f7d69ecc124402c6ehttps://git.kernel.org/stable/c/a48d2bcd23f2c98d575bc2f9b7a3fbd16aeea9ebhttps://git.kernel.org/stable/c/c61d0b87a7028c2c10faffc524d748334c7b9827
2024-03-02
Published