CVE-2026-31435
published 2026-04-22CVE-2026-31435: In the Linux kernel, the following vulnerability has been resolved: netfs: Fix read abandonment during retry Under certain circumstances, all the remaining…
PriorityP344high8.8CVSS 3.1
AVNACLPRNUIRSUCHIHAH
EPSS
0.34%
26.9th percentile
In the Linux kernel, the following vulnerability has been resolved:
netfs: Fix read abandonment during retry
Under certain circumstances, all the remaining subrequests from a read
request will get abandoned during retry. The abandonment process expects
the 'subreq' variable to be set to the place to start abandonment from, but
it doesn't always have a useful value (it will be uninitialised on the
first pass through the loop and it may point to a deleted subrequest on
later passes).
Fix the first jump to "abandon:" to set subreq to the start of the first
subrequest expected to need retry (which, in this abandonment case, turned
out unexpectedly to no longer have NEED_RETRY set).
Also clear the subreq pointer after discarding superfluous retryable
subrequests to cause an oops if we do try to access it.
Affected
8 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| linux | linux | — | — |
| linux | linux | >= ee4cdf7ba857a894ad1650d6ab77669cbbfa329e < 3e5fd8f53b575ff2188f82071da19c977ca56c41 | 3e5fd8f53b575ff2188f82071da19c977ca56c41 |
| linux | linux | >= ee4cdf7ba857a894ad1650d6ab77669cbbfa329e < 8f2f2bd128a8d9edbc1e785760da54ada3df69b7 | 8f2f2bd128a8d9edbc1e785760da54ada3df69b7 |
| linux | linux | >= ee4cdf7ba857a894ad1650d6ab77669cbbfa329e < 7e57523490cd2efb52b1ea97f2e0a74c0fb634cd | 7e57523490cd2efb52b1ea97f2e0a74c0fb634cd |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 6.12 < 6.18.21 | 6.18.21 |
| linux | linux_kernel | >= 6.19 < 6.19.11 | 6.19.11 |
CVSS provenance
nvdv3.18.8HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
vendor_redhat7.0MEDIUM
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Red Hat
kernel: netfs: Fix read abandonment during retry
vendor_redhat·2026-04-22·CVSS 7.0
CVE-2026-31435 [MEDIUM] CWE-824 kernel: netfs: Fix read abandonment during retry
kernel: netfs: Fix read abandonment during retry
A flaw was found in the Linux kernel's netfs component. Under certain circumstances, during a read retry operation, the system may incorrectly abandon subrequests. This issue arises because a pointer (`subreq`) used in the abandonment process can be uninitialized or point to invalid memory. An attacker could potentially exploit this to trigger a kernel oops, leading to a system crash and a Denial of Service (DoS).
Package: kernel (Red Hat Enterprise Linux 10) - Affected
Package: kernel (Red Hat Enterprise Linux 6) - Not affected
Package: kernel (Red Hat Enterprise Linux 7) - Not affected
Package: kernel-rt (Red Hat Enterprise Linux 7) - Not affected
Package: kernel (Red Hat Enterprise Linux 8) - Not affected
Package: kernel-rt (Red Ha
VulDB
Linux Kernel up to 6.18.20/6.19.10 netfs infinite loop (WID-SEC-2026-1252)
vuldb·2026-04-23
CVE-2026-31435 [CRITICAL] Linux Kernel up to 6.18.20/6.19.10 netfs infinite loop (WID-SEC-2026-1252)
A vulnerability was found in Linux Kernel up to 6.18.20/6.19.10. It has been declared as critical. Affected by this issue is some unknown functionality of the component netfs. The manipulation results in infinite loop.
This vulnerability is cataloged as CVE-2026-31435. The attack must originate from the local network. There is no exploit available.
It is recommended to upgrade the affected component.
GHSA
GHSA-qfvq-ggc7-jqgw: In the Linux kernel, the following vulnerability has been resolved:
netfs: Fix read abandonment during retry
Under certain circumstances, all the re
ghsa_unreviewed·2026-04-22
CVE-2026-31435 GHSA-qfvq-ggc7-jqgw: In the Linux kernel, the following vulnerability has been resolved:
netfs: Fix read abandonment during retry
Under certain circumstances, all the re
In the Linux kernel, the following vulnerability has been resolved:
netfs: Fix read abandonment during retry
Under certain circumstances, all the remaining subrequests from a read
request will get abandoned during retry. The abandonment process expects
the 'subreq' variable to be set to the place to start abandonment from, but
it doesn't always have a useful value (it will be uninitialised on the
first pass through the loop and it may point to a deleted subrequest on
later passes).
Fix the first jump to "abandon:" to set subreq to the start of the first
subrequest expected to need retry (which, in this abandonment case, turned
out unexpectedly to no longer have NEED_RETRY set).
Also clear the subreq pointer after discarding superfluous retryable
subrequests to cause an oops if we do tr
No detection rules found.
No public exploits indexed.
2026-04-22
Published