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curl: set CVE_STATUS for CVE-2026-8458

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CVE-2026-8458 allows a Negotiate-authenticated connection to be
incorrectly reused for a request using a different SASL service name.

Scarthgap uses curl 8.7.1, which is within the affected version range.
The vulnerable code path on Linux requires both Negotiate authentication
and GSSAPI support, represented by the negotiate-auth and krb5
PACKAGECONFIG options.

The upstream fix [1] stores the SASL service name in struct Curl_creds
and includes it in connection-reuse comparisons. However, struct
Curl_creds was introduced by the credential-management rework in [2],
after curl 8.7.1. Therefore, the security fix cannot be cleanly
backported without introducing a substantial credential-management
refactor.

Use a conditional CVE_STATUS as the least invasive solution. Report the
CVE as unpatched when both krb5 and negotiate-auth are enabled. Otherwise,
mark it not-applicable-config because the vulnerable GSSAPI-backed
Negotiate implementation is not built. The default Scarthgap
configuration enables negotiate-auth but does not enable krb5.

References:
[1] https://github.com/curl/curl/commit/5e99b73cf441d9c369768b9cd48b5389b9a2503d
[2] https://github.com/curl/curl/commit/8f71d0fde515aa4c68002477356c35bd79927729
[3] https://curl.se/docs/CVE-2026-8458.html

(From OE-Core rev: e986fa2c8d74c1b943bb9069e47d1a9ae7dee9e0)

Signed-off-by: Devansh Patel <devanshp@cisco.com>
Signed-off-by: Yoann Congal <yoann.congal@smile.fr>
Signed-off-by: Paul Barker <paul@pbarker.dev>
This commit is contained in:
Devansh Patel authored and Paul Barker committed 2026-09-28 10:17:43 +01:00
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commit e5bbef52ba
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meta/recipes-support/curl/curl_8.7.1.bb
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@@ -57,6 +57,7 @@ CVE_STATUS[CVE-2025-0725] = "not-applicable-config: gzip decompression of conten
CVE_STATUS[CVE-2025-5025] = "${@bb.utils.contains('PACKAGECONFIG', 'openssl', 'not-applicable-config: applicable only with wolfssl','unpatched',d)}"
CVE_STATUS[CVE-2025-10966] = "${@bb.utils.contains('PACKAGECONFIG', 'openssl', 'not-applicable-config: applicable only with wolfssl','unpatched',d)}"
CVE_STATUS[CVE-2026-10536] = "${@bb.utils.contains('PACKAGECONFIG', 'nghttp2', 'unpatched', 'not-applicable-config: applicable only with HTTP/2', d)}"
CVE_STATUS[CVE-2026-8458] = "${@bb.utils.contains('PACKAGECONFIG', 'krb5 negotiate-auth', 'unpatched', 'not-applicable-config: applicable only with GSS-API-backed Negotiate authentication', d)}"
inherit autotools pkgconfig binconfig multilib_header ptest