CVE-2025-40022
published 2025-10-24CVE-2025-40022: In the Linux kernel, the following vulnerability has been resolved: crypto: af_alg - Fix incorrect boolean values in af_alg_ctx Commit 1b34cbbf4f01 ("crypto…
PriorityP419
EPSS
0.22%
12.4th percentile
In the Linux kernel, the following vulnerability has been resolved:
crypto: af_alg - Fix incorrect boolean values in af_alg_ctx
Commit 1b34cbbf4f01 ("crypto: af_alg - Disallow concurrent writes in
af_alg_sendmsg") changed some fields from bool to 1-bit bitfields of
type u32.
However, some assignments to these fields, specifically 'more' and
'merge', assign values greater than 1. These relied on C's implicit
conversion to bool, such that zero becomes false and nonzero becomes
true.
With a 1-bit bitfields of type u32 instead, mod 2 of the value is taken
instead, resulting in 0 being assigned in some cases when 1 was intended.
Fix this by restoring the bool type.
Affected
21 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 6.1.158-1 (bookworm) | linux 6.1.158-1 (bookworm) |
| debian | linux-6.1 | < linux 6.1.158-1 (bookworm) | linux 6.1.158-1 (bookworm) |
| linux | linux | >= 0f28c4adbc4a97437874c9b669fd7958a8c6d6ce < 3a21698ace915a445bce2d0dcfc84b6d2199baf7 | 3a21698ace915a445bce2d0dcfc84b6d2199baf7 |
| linux | linux | >= 1b34cbbf4f011a121ef7b2d7d6e6920a036d5285 < d0ca0df179c4b21e2a6c4a4fb637aa8fa14575cb | d0ca0df179c4b21e2a6c4a4fb637aa8fa14575cb |
| linux | linux | >= 1f323a48e9b5ebfe6dc7d130fdf5c3c0e92a07c8 < 54506c6335690f4ef1b9f154e34f5a604c72c1ed | 54506c6335690f4ef1b9f154e34f5a604c72c1ed |
| linux | linux | >= 45bcf60fe49b37daab1acee57b27211ad1574042 < fbe96bd25423e61273d8831e995260b429d850b6 | fbe96bd25423e61273d8831e995260b429d850b6 |
| linux | linux | >= 6.1.154 < 6.1.155 | 6.1.155 |
| linux | linux | >= 6.12.49 < 6.12.50 | 6.12.50 |
| linux | linux | >= 6.16.9 < 6.16.10 | 6.16.10 |
| linux | linux | >= 6.6.108 < 6.6.109 | 6.6.109 |
| linux | linux | >= 7c4491b5644e3a3708f3dbd7591be0a570135b84 < 8703940bd30b5ad94408d28d7192db2491cd3592 | 8703940bd30b5ad94408d28d7192db2491cd3592 |
| linux | linux | >= 9aee87da5572b3a14075f501752e209801160d3d < 316b090c2fee964c307a634fecc7df269664b158 | 316b090c2fee964c307a634fecc7df269664b158 |
| linux | linux | >= e4c1ec11132ec466f7362a95f36a506ce4dc08c9 < d382d6daf0184490f366562469a5673f65ee2662 | d382d6daf0184490f366562469a5673f65ee2662 |
| linux | linux_kernel | >= 0 < 5.10.247-1 | 5.10.247-1 |
| linux | linux_kernel | >= 0 < 6.1.158-1 | 6.1.158-1 |
| linux | linux_kernel | >= 0 < 6.12.57-1 | 6.12.57-1 |
| linux | linux_kernel | >= 0 < 6.16.10-1 | 6.16.10-1 |
| linux | linux_kernel | >= 6.1.154 < 6.1.155 | 6.1.155 |
| linux | linux_kernel | >= 6.12.49 < 6.12.50 | 6.12.50 |
| linux | linux_kernel | >= 6.16.9 < 6.16.10 | 6.16.10 |
| linux | linux_kernel | >= 6.6.108 < 6.6.109 | 6.6.109 |
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OSV
crypto: af_alg - Fix incorrect boolean values in af_alg_ctx
osv·2025-10-24
CVE-2025-40022 crypto: af_alg - Fix incorrect boolean values in af_alg_ctx
crypto: af_alg - Fix incorrect boolean values in af_alg_ctx
In the Linux kernel, the following vulnerability has been resolved:
crypto: af_alg - Fix incorrect boolean values in af_alg_ctx
Commit 1b34cbbf4f01 ("crypto: af_alg - Disallow concurrent writes in
af_alg_sendmsg") changed some fields from bool to 1-bit bitfields of
type u32.
However, some assignments to these fields, specifically 'more' and
'merge', assign values greater than 1. These relied on C's implicit
conversion to bool, such that zero becomes false and nonzero becomes
true.
With a 1-bit bitfields of type u32 instead, mod 2 of the value is taken
instead, resulting in 0 being assigned in some cases when 1 was intended.
Fix this by restoring the bool type.
OSV
CVE-2025-40022: In the Linux kernel, the following vulnerability has been resolved: crypto: af_alg - Fix incorrect boolean values in af_alg_ctx Commit 1b34cbbf4f01 ("
osv·2025-10-24
CVE-2025-40022 CVE-2025-40022: In the Linux kernel, the following vulnerability has been resolved: crypto: af_alg - Fix incorrect boolean values in af_alg_ctx Commit 1b34cbbf4f01 ("
In the Linux kernel, the following vulnerability has been resolved: crypto: af_alg - Fix incorrect boolean values in af_alg_ctx Commit 1b34cbbf4f01 ("crypto: af_alg - Disallow concurrent writes in af_alg_sendmsg") changed some fields from bool to 1-bit bitfields of type u32. However, some assignments to these fields, specifically 'more' and 'merge', assign values greater than 1. These relied on C's implicit conversion to bool, such that zero becomes false and nonzero becomes true. With a 1-bit bitfields of type u32 instead, mod 2 of the value is taken instead, resulting in 0 being assigned in some cases when 1 was intended. Fix this by restoring the bool type.
GHSA
GHSA-rjhr-rr92-fh8c: In the Linux kernel, the following vulnerability has been resolved:
crypto: af_alg - Fix incorrect boolean values in af_alg_ctx
Commit 1b34cbbf4f01
ghsa_unreviewed·2025-10-24
CVE-2025-40022 GHSA-rjhr-rr92-fh8c: In the Linux kernel, the following vulnerability has been resolved:
crypto: af_alg - Fix incorrect boolean values in af_alg_ctx
Commit 1b34cbbf4f01
In the Linux kernel, the following vulnerability has been resolved:
crypto: af_alg - Fix incorrect boolean values in af_alg_ctx
Commit 1b34cbbf4f01 ("crypto: af_alg - Disallow concurrent writes in
af_alg_sendmsg") changed some fields from bool to 1-bit bitfields of
type u32.
However, some assignments to these fields, specifically 'more' and
'merge', assign values greater than 1. These relied on C's implicit
conversion to bool, such that zero becomes false and nonzero becomes
true.
With a 1-bit bitfields of type u32 instead, mod 2 of the value is taken
instead, resulting in 0 being assigned in some cases when 1 was intended.
Fix this by restoring the bool type.
Red Hat
kernel: crypto: af_alg - Fix incorrect boolean values in af_alg_ctx
vendor_redhat·2025-10-24
CVE-2025-40022 kernel: crypto: af_alg - Fix incorrect boolean values in af_alg_ctx
kernel: crypto: af_alg - Fix incorrect boolean values in af_alg_ctx
In the Linux kernel, the following vulnerability has been resolved:
crypto: af_alg - Fix incorrect boolean values in af_alg_ctx
Commit 1b34cbbf4f01 ("crypto: af_alg - Disallow concurrent writes in
af_alg_sendmsg") changed some fields from bool to 1-bit bitfields of
type u32.
However, some assignments to these fields, specifically 'more' and
'merge', assign values greater than 1. These relied on C's implicit
conversion to bool, such that zero becomes false and nonzero becomes
true.
With a 1-bit bitfields of type u32 instead, mod 2 of the value is taken
instead, resulting in 0 being assigned in some cases when 1 was intended.
Fix this by restoring the bool type.
Package: kernel (Red Hat Enterprise Linux 10) - Not affected
Debian
CVE-2025-40022: linux - In the Linux kernel, the following vulnerability has been resolved: crypto: af_...
vendor_debian·2025
CVE-2025-40022 CVE-2025-40022: linux - In the Linux kernel, the following vulnerability has been resolved: crypto: af_...
In the Linux kernel, the following vulnerability has been resolved: crypto: af_alg - Fix incorrect boolean values in af_alg_ctx Commit 1b34cbbf4f01 ("crypto: af_alg - Disallow concurrent writes in af_alg_sendmsg") changed some fields from bool to 1-bit bitfields of type u32. However, some assignments to these fields, specifically 'more' and 'merge', assign values greater than 1. These relied on C's implicit conversion to bool, such that zero becomes false and nonzero becomes true. With a 1-bit bitfields of type u32 instead, mod 2 of the value is taken instead, resulting in 0 being assigned in some cases when 1 was intended. Fix this by restoring the bool type.
Scope: local
bookworm: resolved (fixed in 6.1.158-1)
bullseye: resolved (fixed in 5.10.247-1)
forky: resolved (fixed in 6.16.10-1)
No detection rules found.
No public exploits indexed.
https://git.kernel.org/stable/c/316b090c2fee964c307a634fecc7df269664b158https://git.kernel.org/stable/c/3a21698ace915a445bce2d0dcfc84b6d2199baf7https://git.kernel.org/stable/c/54506c6335690f4ef1b9f154e34f5a604c72c1edhttps://git.kernel.org/stable/c/8703940bd30b5ad94408d28d7192db2491cd3592https://git.kernel.org/stable/c/d0ca0df179c4b21e2a6c4a4fb637aa8fa14575cbhttps://git.kernel.org/stable/c/d382d6daf0184490f366562469a5673f65ee2662https://git.kernel.org/stable/c/fbe96bd25423e61273d8831e995260b429d850b6https://cert-portal.siemens.com/productcert/html/ssa-019113.htmlhttps://cert-portal.siemens.com/productcert/html/ssa-082556.html
2025-10-24
Published